Patent Description:
Examples of endoscopic surgical instruments include surgical staplers. Some such staplers are operable to clamp down on layers of tissue, cut through the clamped layers of tissue, and drive staples through the layers of tissue to substantially seal the severed layers of tissue together near the severed ends of the tissue layers. Merely exemplary surgical staplers are disclosed in <CIT>; <CIT>; and <CIT>.

Surgical staplers may also be used in open procedures and/or other non-endoscopic procedures. By way of example only, a surgical stapler may be inserted through a thoracotomy and thereby between a patient's ribs to reach one or more organs in a thoracic surgical procedure that does not use a trocar as a conduit for the stapler. For instance, the vessels leading to an organ may be severed and closed by a stapler before removal of the organ from the thoracic cavity. Of course, surgical staplers may be used in various other settings and procedures.

US patent application publication <CIT> discloses a fastener cartridge assembly for use with a surgical end effector. The fastener cartridge assembly can comprise a cartridge body having fastener cavities, fasteners removably positioned in the fastener cavities, a layer of material releasably secured relative to the cartridge body, a connector configured to secure the layer of material to the cartridge body at a location distal to at least one fastener cavity, and an actuator. The layer of material can be a tissue thickness compensator. When actuated, the actuator can overcome the connector, and can overcome the connector prior to the removal of the fasteners from the fastener cavities. The actuator can be actuated at a location proximal to at least one fastener cavity, and can extend distally past at least one fastener cavity toward the connector.

US patent application publication <CIT> discloses a staple cartridge assembly comprising a tissue thickness compensator. The tissue thickness compensator comprises a first fibrous, woven material and a second fibrous, woven material. The first fibrous, woven material comprises a density which is different than the density of the second fibrous, woven material. The tissue thickness compensator is configured to expand upon contact with a fluid in order to apply a compressive force to tissue captured within staples.

US patent application publication <CIT> discloses a buttress applied to an end effector of a surgical stapler. The buttress is loaded on a platform of a buttress applier cartridge. The end effector is closed upon the platform. An adhesive layer of the buttress secures the buttress to the end effector. The buttress is thus adhered to the end effector when the end effector is opened. The end effector is then actuated on tissue of a patient, thereby stapling the buttress to the tissue.

The present invention provides an apparatus as recited in claim <NUM>. Optional features are recited in the dependent claims.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate devices. Specific embodiments of the invention are shown in <FIG>. Together with the general description of the invention given above, and the detailed description of the embodiments given below, the drawings serve to explain the principles of the present invention.

For clarity of disclosure, the terms "proximal" and "distal" are defined herein relative to a human or robotic operator of the surgical instrument. The term "proximal" refers the position of an element closer to the human or robotic operator of the surgical instrument and further away from the surgical end effector of the surgical instrument. The term "distal" refers to the position of an element closer to the surgical end effector of the surgical instrument and further away from the human or robotic operator of the surgical instrument. In addition, the terms "upper," "lower," "lateral," "transverse," "bottom," "top," are relative terms to provide additional clarity to the figure descriptions provided below. The terms "upper," "lower," "lateral," "transverse," "bottom," "top," are thus not intended to unnecessarily limit the invention described herein.

<FIG> depict an exemplary surgical stapling and severing instrument (<NUM>) that is sized for insertion through a trocar cannula or an incision (e.g., thoracotomy, etc.) to a surgical site in a patient for performing a surgical procedure. Instrument (<NUM>) of the present example includes a handle portion (<NUM>) connected to a shaft (<NUM>), which distally terminates in an articulation joint (<NUM>), which is further coupled with an end effector (<NUM>). Once articulation joint (<NUM>) and end effector (<NUM>) are inserted through the cannula passageway of a trocar, articulation joint (<NUM>) may be remotely articulated, as depicted in phantom in <FIG>, by an articulation control (<NUM>), such that end effector (<NUM>) may be deflected from the longitudinal axis (LA) of shaft (<NUM>) at a desired angle (α). End effector (<NUM>) of the present example includes a lower jaw (<NUM>) that includes a staple cartridge (<NUM>), and an upper jaw in the form of a pivotable anvil (<NUM>).

Handle portion (<NUM>) includes a pistol grip (<NUM>) and a closure trigger (<NUM>). Closure trigger (<NUM>) is pivotable toward pistol grip (<NUM>) to cause clamping, or closing, of the anvil (<NUM>) toward lower jaw (<NUM>) of end effector (<NUM>). Such closing of anvil (<NUM>) is provided through a closure tube (<NUM>) and a closure ring (<NUM>), which both longitudinally translate relative to handle portion (<NUM>) in response to pivoting of closure trigger (<NUM>) relative to pistol grip (<NUM>). Closure tube (<NUM>) extends along the length of shaft (<NUM>); and closure ring (<NUM>) is positioned distal to articulation joint (<NUM>). Articulation joint (<NUM>) is operable to communicate/transmit longitudinal movement from closure tube (<NUM>) to closure ring (<NUM>).

As shown in <FIG>, handle portion (<NUM>) also includes a firing trigger (<NUM>). An elongate member (not shown) longitudinally extends through shaft (<NUM>) and communicates a longitudinal firing motion from handle portion (<NUM>) to a firing beam (<NUM>) in response to actuation of firing trigger (<NUM>). This distal translation of firing beam (<NUM>) causes the stapling and severing of clamped tissue in end effector (<NUM>), as will be described in greater detail below.

As shown in <FIG>, end effector (<NUM>) employs a firing beam (<NUM>) that includes a transversely oriented upper pin (<NUM>), a firing beam cap (<NUM>), a transversely oriented middle pin (<NUM>), and a distally presented cutting edge (<NUM>). Upper pin (<NUM>) is positioned and translatable within a longitudinal anvil slot (<NUM>) of anvil (<NUM>). Firing beam cap (<NUM>) slidably engages a lower surface of lower jaw (<NUM>) by having firing beam (<NUM>) extend through lower jaw slot (<NUM>) (shown in <FIG>) that is formed through lower jaw (<NUM>). Middle pin (<NUM>) slidingly engages a top surface of lower jaw (<NUM>), cooperating with firing beam cap (<NUM>).

<FIG> shows firing beam (<NUM>) of the present example proximally positioned and anvil (<NUM>) pivoted to an open configuration, allowing an unspent staple cartridge (<NUM>) to be removably installed into a channel of lower jaw (<NUM>). As best seen in <FIG>, staple cartridge (<NUM>) of the present example includes a cartridge body (<NUM>), which presents an upper deck (<NUM>) and is coupled with a lower cartridge tray (<NUM>). As best seen in <FIG>, a vertical slot (<NUM>) extends longitudinally through a portion of staple cartridge body (<NUM>). As also best seen in <FIG>, three rows of staple apertures (<NUM>) are formed through upper deck (<NUM>) on each lateral side of vertical slot (<NUM>). As shown in <FIG>, a wedge sled (<NUM>) and a plurality of staple drivers (<NUM>) are captured between cartridge body (<NUM>) and tray (<NUM>), with wedge sled (<NUM>) being located proximal to staple drivers (<NUM>). Wedge sled (<NUM>) is movable longitudinally within staple cartridge (<NUM>); while staple drivers (<NUM>) are movable vertically within staple cartridge (<NUM>). Staples (<NUM>) are also positioned within cartridge body (<NUM>), above corresponding staple drivers (<NUM>). Each staple (<NUM>) is driven vertically within cartridge body (<NUM>) by a staple driver (<NUM>) to drive staple (<NUM>) out through an associated staple aperture (<NUM>). As best seen in <FIG> and <FIG>, wedge sled (<NUM>) presents inclined cam surfaces that urge staple drivers (<NUM>) upwardly as wedge sled (<NUM>) is driven distally through staple cartridge (<NUM>).

With end effector (<NUM>) closed, as depicted in <FIG> by distally advancing closure tube (<NUM>) and closure ring (<NUM>), firing beam (<NUM>) is then advanced distally into engagement with anvil (<NUM>) by having upper pin (<NUM>) enter longitudinal anvil slot (<NUM>). A pusher block (<NUM>) (shown in <FIG>) located at the distal end of firing beam (<NUM>) pushes wedge sled (<NUM>) distally as firing beam (<NUM>) is advanced distally through staple cartridge (<NUM>) when firing trigger (<NUM>) is actuated. During such firing, cutting edge (<NUM>) of firing beam (<NUM>) enters vertical slot (<NUM>) of staple cartridge (<NUM>), severing tissue clamped between staple cartridge (<NUM>) and anvil (<NUM>). As shown in <FIG>, middle pin (<NUM>) and pusher block (<NUM>) together actuate staple cartridge (<NUM>) by entering into vertical slot (<NUM>) within staple cartridge (<NUM>), driving wedge sled (<NUM>) into upward camming contact with staple drivers (<NUM>), which in turn drives staples (<NUM>) out through staple apertures (<NUM>) and into forming contact with staple forming pockets (<NUM>) (shown in <FIG>) on the inner surface of anvil (<NUM>). <FIG> depicts firing beam (<NUM>) fully distally translated after completing severing and stapling of tissue. Staple forming pockets (<NUM>) are intentionally omitted from the view in <FIG> but are shown in <FIG>. Anvil (<NUM>) is intentionally omitted from the view in <FIG>.

<FIG> shows end effector (<NUM>) having been actuated through a single firing stroke through tissue (<NUM>). Cutting edge (<NUM>) (obscured in <FIG>) has cut through tissue (<NUM>), while staple drivers (<NUM>) have driven three alternating rows of staples (<NUM>) through the tissue (<NUM>) on each side of the cut line produced by cutting edge (<NUM>). After the first firing stroke is complete, end effector (<NUM>) is withdrawn from the patient, spent staple cartridge (<NUM>) is replaced with a new staple cartridge (<NUM>), and end effector (<NUM>) is then again inserted into the patient to reach the stapling site for further cutting and stapling. This process may be repeated until the desired quantity and pattern of firing strokes across the tissue (<NUM>) has been completed.

Instrument (<NUM>) may be further constructed and operable in accordance with any of the teachings of the following references: <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; and/or <CIT>.

In some instances, it may be desirable to equip end effector (<NUM>) of surgical instrument (<NUM>) with an adjunct material, such as a buttress, to reinforce the mechanical fastening of tissue provided by staples (<NUM>). Such a buttress may prevent the applied staples (<NUM>) from pulling through the tissue and may otherwise reduce a risk of tissue tearing at or near the site of applied staples (<NUM>). In addition to or as an alternative to providing structural support and integrity to a line of staples (<NUM>), a buttress may provide various other kinds of effects such as spacing or gap-filling, administration of therapeutic agents, and/or other effects. In some instances, a buttress may be provided on upper deck (<NUM>) of staple cartridge (<NUM>). As described above, deck (<NUM>) houses staples (<NUM>), which are driven by staple driver (<NUM>). In some other instances, a buttress may be provided on the surface of anvil (<NUM>) that faces staple cartridge (<NUM>). It should also be understood that a first buttress may be provided on upper deck (<NUM>) of staple cartridge (<NUM>) while a second buttress is provided on anvil (<NUM>) of the same end effector (<NUM>).

Various examples of forms that a buttress may take will be described in greater detail below. Various ways in which a buttress may be secured to a staple cartridge (<NUM>) or an anvil (<NUM>) will also be described in greater detail below. Exemplary buttress assemblies, exemplary materials and techniques for applying buttress assemblies, and exemplary buttress applier cartridges may be configured in accordance with at least some of the teachings of <CIT>; and/or in <CIT>.

<FIG> shows an exemplary pair of buttress assemblies (<NUM>, <NUM>) (each also referred to individually as a "buttress"). Buttress assembly (<NUM>) of this example comprises a buttress body (<NUM>) and an upper adhesive layer (<NUM>). Similarly, buttress assembly (<NUM>) comprises a buttress body (<NUM>) and a lower adhesive layer (<NUM>). In the present example, each buttress body (<NUM>, <NUM>) comprises a strong yet flexible material configured to structurally support a line of staples (<NUM>). By way of example only, each buttress body (<NUM>, <NUM>) may comprise a mesh of polyglactin <NUM> material by Ethicon, Inc. of Somerville, New Jersey. Alternatively, any other suitable materials or combinations of materials may be used in addition to or as an alternative to polyglactin <NUM> material to form each buttress body (<NUM>, <NUM>).

Each buttress body (<NUM>, <NUM>) may comprise a material including, for example, a hemostatic agent such as fibrin to assist in coagulating blood and reduce bleeding at the severed and/or stapled surgical site along tissue (T<NUM>, T<NUM>). As another merely illustrative example, each buttress body (<NUM>, <NUM>) may comprise other adjuncts or hemostatic agents such as thrombin may be used such that each buttress body (<NUM>, <NUM>) may assist to coagulate blood and reduce the amount of bleeding at the surgical site. Other adjuncts or reagents that may be incorporated into each buttress body (<NUM>, <NUM>) may further include but are not limited to medical fluid or matrix components.

In the present example, adhesive layer (<NUM>) is provided on buttress body (<NUM>) to adhere buttress body (<NUM>) to underside (<NUM>) of anvil (<NUM>). Similarly, adhesive layer (<NUM>) is provided on buttress body (<NUM>) to adhere buttress body (<NUM>) to upper deck (<NUM>) of staple cartridge (<NUM>). Such an adhesive material may provide proper positioning of buttress body (<NUM>, <NUM>) before and during actuation of end effector (<NUM>); then allow buttress body (<NUM>, <NUM>) to separate from end effector (<NUM>) after end effector (<NUM>) has been actuated, without causing damage to buttress body (<NUM>, <NUM>) that is substantial enough to compromise the proper subsequent functioning of buttress body (<NUM>, <NUM>).

<FIG> show an exemplary sequence in which surgical stapler end effector (<NUM>), which has been loaded with buttress assemblies (<NUM>, <NUM>), is actuated to drive staples (<NUM>) through two opposed layers of tissue (T<NUM>, T<NUM>), with buttress assemblies (<NUM>, <NUM>) being secured to the same layers of tissue (T<NUM>, T<NUM>) by staples (<NUM>). In particular, <FIG> shows layers of tissue (T<NUM>, T<NUM>) positioned between anvil (<NUM>) and staple cartridge (<NUM>), with anvil (<NUM>) in the open position. Buttress assembly (<NUM>) is adhered to underside (<NUM>) of anvil (<NUM>) via adhesive layer (<NUM>); while buttress assembly (<NUM>) is adhered to upper deck (<NUM>) of staple cartridge (<NUM>) via adhesive layer (<NUM>). Layers of tissue (T<NUM>, T<NUM>) are thus interposed between buttress assemblies (<NUM>, <NUM>). Next, closure trigger (<NUM>) is pivoted toward pistol grip (<NUM>) to drive closure tube (<NUM>) and closure ring (<NUM>) distally. This drives anvil (<NUM>) to the closed position as shown in <FIG>. At this stage, layers of tissue (T<NUM>, T<NUM>) are compressed between anvil (<NUM>) and staple cartridge (<NUM>), with buttress assemblies (<NUM>, <NUM>) engaging opposite surfaces of tissue layers (T<NUM>, T<NUM>). End effector (<NUM>) is then actuated as described above, driving staple (<NUM>) through buttress assemblies (<NUM>, <NUM>) and tissue (T<NUM>, T<NUM>). As shown in FIG. 13C, crown (<NUM>) of driven staple (<NUM>) captures and retains buttress assembly (<NUM>) against layer of tissue (T<NUM>). Deformed legs (<NUM>) of staple (<NUM>) capture and retain buttress assembly (<NUM>) against layer of tissue (T<NUM>).

A series of staples (<NUM>) similarly capture and retain buttress assemblies (<NUM>, <NUM>) against layers of tissue (T<NUM>, T<NUM>), thereby securing buttress assemblies (<NUM>, <NUM>) to tissue (T<NUM>, T<NUM>) as shown in <FIG>. As end effector (<NUM>) is pulled away from tissue (T<NUM>, T<NUM>) after deploying staples (<NUM>) and buttress assemblies (<NUM>, <NUM>), buttress assemblies (<NUM>, <NUM>) disengage end effector such that buttress assemblies (<NUM>, <NUM>) remain secured to tissue (T<NUM>, T<NUM>) with staples (<NUM>). Buttresses (<NUM>, <NUM>) thus provides structural reinforcement to the lines of staples (<NUM>) formed in tissue (T<NUM>, T<NUM>). As can also be seen in <FIG>, distally presented cutting edge (<NUM>) of firing beam (<NUM>) also cuts through a centerline of buttress tissue assemblies (<NUM>, <NUM>), separating each buttress assembly (<NUM>, <NUM>) into a corresponding pair of sections, such that each section remains secured to a respective severed region of tissue (T<NUM>, T<NUM>).

Because end effector (<NUM>) of surgical instrument (<NUM>) may be actuated multiple times during a single surgical procedure, it may be desirable to enable an operator to repeatedly and easily load buttress assemblies (<NUM>, <NUM>) onto end effector jaws (<NUM>, <NUM>) during that single surgical procedure. <FIG> show an exemplary buttress applier cartridge (<NUM>) (also referred to as a "buttress applicator") that may be used to support, protect, and apply adjunct material, such as buttress assemblies (<NUM>, <NUM>), to end effector (<NUM>). As best seen in <FIG>, cartridge (<NUM>) of this example comprises an open end (<NUM>) and a closed end (<NUM>). Open end (<NUM>) is configured to receive end effector (<NUM>) as will be described in greater detail below. Cartridge (<NUM>) further includes a first housing (216a) and a second housing (216b), which each collectively generally define a "U" shape to present open end (<NUM>). A platform (<NUM>) and a sled retainer (<NUM>) are interposed between first and second housings (216a, 216b).

Platform (<NUM>) of the present example is configured to support a pair of buttress assemblies (<NUM>) on one side of platform (<NUM>) and another pair of buttress assemblies (<NUM>) on the other side of platform (<NUM>). Platform (<NUM>) is exposed in recesses that are formed between the prongs of the "U" configuration of first and second housings (216a, 216b). Each buttress assembly (<NUM>, <NUM>) is provided in a respective pair of portions that are separated to avoid spanning across slots (<NUM>, <NUM>) of anvil (<NUM>) and staple cartridge (<NUM>), respectively, though platform (<NUM>) may just as easily support wide versions of buttress assemblies (<NUM>, <NUM>) that unitarily span across slots (<NUM>, <NUM>) of anvil (<NUM>) and staple cartridge (<NUM>), respectively. More specifically, the outer edges of platform (<NUM>) include retention features (<NUM>) in the form of ridges that further engage first and second housings (216a, 216b) to prevent platform (<NUM>) from sliding relative to first and second housings (216a, 216b).

First and second housings (216a, 216b) include integral gripping features (<NUM>) and indicator plates (<NUM>) positioned to correspond with windows (<NUM>) formed in first and second housings (216a, 216b), such that indicator plates (<NUM>) are visible through windows (<NUM>) at different times. Arms (<NUM>) of the present example are configured to selectively secure buttress assemblies (<NUM>, <NUM>) to platform (<NUM>). In the present example, arms (<NUM>) are resilient and are thus configured to resiliently bear against buttress assemblies (<NUM>, <NUM>), thereby pinching buttress assemblies (<NUM>, <NUM>) against platform (<NUM>). Buttress applier cartridge (<NUM>) includes a pair of tapered cam surfaces (<NUM>) and a respective pair of housing engagement features (<NUM>) positioned to engage corresponding surfaces of first and second housings (216a, 216b). First and second housings (216a, 216b) include proximal guide features (<NUM>) and distal guide features (<NUM>) configured to assist in providing proper alignment of end effector (<NUM>) with cartridge (<NUM>).

<FIG> shows cartridge (<NUM>) in a configuration where retainer arms (<NUM>) are positioned to hold buttress assemblies (<NUM>, <NUM>) against platform (<NUM>); while <FIG> shows cartridge (<NUM>) in a configuration where retainer arms (<NUM>) are positioned to release buttress assemblies (<NUM>, <NUM>) from platform (<NUM>). While <FIG> only show buttress assembly (<NUM>) on platform (<NUM>), buttress assembly (<NUM>) would be retained on and released from platform (<NUM>) in an identical fashion. To use cartridge (<NUM>) to load end effector (<NUM>), the operator would first position cartridge (<NUM>) and end effector (<NUM>) such that end effector is aligned with open end (<NUM>) of cartridge (<NUM>) as shown in <FIG>. The operator would then advance end effector (<NUM>) distally, and/or advance cartridge (<NUM>) proximally, to position platform (<NUM>) and buttress assemblies (<NUM>, <NUM>) between anvil (<NUM>) and staple cartridge (<NUM>) as shown in <FIG>. Closure trigger (<NUM>) of instrument (<NUM>) is then squeezed by the operator to close end effector jaws (<NUM>, <NUM>) on platform (<NUM>), thereby adhesively attaching buttress assemblies (<NUM>, <NUM>) to anvil (<NUM>) and staple cartridge (<NUM>), and simultaneously depressing cam surface (<NUM>). Depression of cam surface (<NUM>) actuates retainer arms (<NUM>) laterally outwardly to thereby release buttress assemblies (<NUM>, <NUM>) from platform (<NUM>), such that end effector jaws (<NUM>, <NUM>) may be disengaged from platform (<NUM>) while buttress assemblies (<NUM>, <NUM>) remain adhered to anvil (<NUM>) and staple cartridge (<NUM>).

In some instances, it may be desirable to provide an applicator device that is configured to apply a staple reinforcing adjunct element to one or both jaws of a surgical stapler end effector while the jaws remain in an open state, or otherwise without closing the jaws via actuation of the stapler's end effector closure system, such as via actuation of closure trigger (<NUM>) of surgical stapler (<NUM>). The exemplary applicator devices described below provide such functionality, such that each applicator device is configured to be manipulated relative to an end effector to apply an adjunct element to one or both jaws without requiring actuated closure of the jaws like that shown in <FIG> described above. Additionally, the exemplary applicator devices described below may be operable to apply a minimum pressure to appropriately seat the adjunct material on the desired jaw (e.g., lower jaw (<NUM>) or anvil (<NUM>)).

In addition, in such examples, it may also be desirable for such applicator devices to include certain features to promote alignment between the applicator device and the jaws of the end effector. Such features may additionally, or in the alternative, be used to prevent reuse of such applicator devices, the end effector, or both. Such features may additionally, or in the alternative, be used to authenticate such applicator devices with a given end effector to promote use of such applicator devices with only a specific predetermined end effector or end effectors having a specific predetermined configuration.

It will be appreciated that any of the exemplary applicator devices described below may be configured to apply an adjunct element in the form of a buttress, such as buttresses (<NUM>, <NUM>) described above, or a tissue thickness compensator, for example of the type disclosed in <CIT> and now abandoned. Additionally, application of a staple reinforcement element to an end effector jaw may be achieved with adhesive features as described above and/or with mechanical coupling features, for example of the type disclosed in <CIT>. Furthermore, any of the exemplary applicator devices described below may be suitably constructed for a single use or for multiple uses.

<FIG> shows an exemplary alternative buttress applier cartridge (<NUM>) (also referred to as a "buttress applicator") that may be used to support, protect, and apply adjunct material, such as buttress assemblies (<NUM>, <NUM>), to end effector (<NUM>). Buttress applier cartridge (<NUM>) of the present example is substantially similar to buttress applier cartridge (<NUM>) described above except where otherwise explicitly described herein. For instance, as with cartridge, cartridge (<NUM>) of this example comprises an open end (<NUM>) and a closed end (<NUM>). As with open end (<NUM>) described above, open end (<NUM>) of this example is configured to receive end effector (<NUM>) as will be described in greater detail below. Similarly, cartridge (<NUM>) of this example further includes a first housing (416a) and a second housing (416b), which each collectively generally define a "U" shape to present open end (<NUM>). A platform (<NUM>) is similarly interposed between first and second housings (416a, 416b).

As with platform (<NUM>) described above, platform (<NUM>) of the present example is configured to support a pair of buttress assemblies (<NUM>) on one side of platform (<NUM>) and another pair of buttress assemblies (<NUM>) on the other side of platform (<NUM>). Platform (<NUM>) is exposed in recesses that are formed between the prongs of the "U" configuration of first and second housings (416a, 416b). Each buttress assembly (<NUM>, <NUM>) is provided in a respective pair of portions that are separated to avoid spanning across slots (<NUM>, <NUM>) of anvil (<NUM>) and staple cartridge (<NUM>), respectively, though platform (<NUM>) may just as easily support wide versions of buttress assemblies (<NUM>, <NUM>) that unitarily span across slots (<NUM>, <NUM>) of anvil (<NUM>) and staple cartridge (<NUM>), respectively.

Unlike platform (<NUM>) described above, platform (<NUM>) of this example is generally configured to expand in one or more directions for application of buttress assemblies (<NUM>, <NUM>). As will be described in greater detail below, this functionality may be achieved by platform (<NUM>) operating as an expandable wedge. By way of example only, this functionality can be accomplished in some examples by configuring platform (<NUM>) or other suitable features of cartridge (<NUM>) in accordance with the teachings of <CIT>, entitled "Apparatus and Method to Apply Buttress to End Effector of Surgical Stapler via Driven Member," filed on even date herewith.

As with cartridge (<NUM>) described above, first and second housings (416a, 416b) include gripping features (<NUM>). However, unlike gripping features (<NUM>) described above, gripping features (<NUM>) of the present example are movable to selectively expand platform (<NUM>). As will be described in greater detail below, gripping features (<NUM>) are generally configured for translation relative to housings (416a, 416b) to thereby activate expansion of platform (<NUM>). As will also be described in greater detail below, it should be understood in certain configurations, gripping features (<NUM>) can be locked to prevent expansion of platform or otherwise lockout application of buttress assemblies (<NUM>, <NUM>) using cartridge (<NUM>).

Unlike cartridge (<NUM>) described above, cartridge (<NUM>) of the present example includes a lockout assembly (<NUM>) disposed within housings (416a, 416b). Lockout assembly (<NUM>) is generally configured to prevent expansion of platform (<NUM>) until cartridge (<NUM>) is properly positioned within end effector (<NUM>) to thereby prevent misapplication of buttress assemblies (<NUM>, <NUM>). In other words, lockout assembly (<NUM>) is generally configured to permit deployment of buttress assemblies (<NUM>, <NUM>) only when a predetermined portion of end effector (<NUM>) engages lockout assembly (<NUM>). Such engagement can then be used to permit movement of gripping features (<NUM>) to activate expansion or other movement of platform (<NUM>).

Lockout assembly (<NUM>) of the present example is positioned proximate open end (<NUM>) and includes two actuators (<NUM>) extending inwardly into open end (<NUM>) from either side of cartridge (<NUM>) thereof. Each actuator (<NUM>) includes an engagement portion (<NUM>), a spring collar (<NUM>), a release opening (<NUM>), and a lock end (<NUM>). Although not shown, it should be understood that each actuator (<NUM>) in the present example is configured as an elongate rod, I-beam, or other elongate structure. Of course, various other suitable cross-sectional shapes may be used for each actuator (<NUM>) as will be apparent to those of ordinary skill in the art in view of the teachings herein.

Engagement portion (<NUM>) of each actuator (<NUM>) defines a length suitable for extending into open end (<NUM>) from housings (416a, 416b). In the present example, this length of extension for each engagement portion (<NUM>) is generally equivalent to half of the lateral length of open end (<NUM>). Thus, engagement portions (<NUM>) of each actuator (<NUM>) extend towards each other to collectively occupy the entire lateral length of open end (<NUM>). Alternatively, engagement portions (<NUM>) of each actuator (<NUM>) may collectively occupy most of the lateral length of open end (<NUM>) to define a slight gap at the end of each engagement portion (<NUM>). As will be described in greater detail below, such a gap between engagement portions (<NUM>) may be desirable to promote movement of each actuator (<NUM>) through engagement with a portion of end effector (<NUM>).

Spring collar (<NUM>) is positioned along the length of each actuator (<NUM>) between a respective engagement portion (<NUM>) and release opening (<NUM>). Spring collar (<NUM>) is generally configured to engage a spring (<NUM>) disposed within one or more of housings (416a, 416b) to bias each actuator (<NUM>) towards a predetermined position. In the present example, the combination of spring collar (<NUM>) and spring (<NUM>) is configured to bias each actuator (<NUM>) towards a locked position corresponding to the configuration shown in <FIG>. As will be described in greater detail below, each actuator (<NUM>) is positioned to prevent movement of a corresponding gripping feature (<NUM>) when in the locked position.

Release opening (<NUM>) is defined within each actuator (<NUM>) proximate lock end (<NUM>). As will be described in greater detail below, release opening (<NUM>) is generally configured to receive a portion of a corresponding gripping feature (<NUM>). To facilitation such a configuration, each release opening (<NUM>) corresponding to each actuator (<NUM>) extends through actuator (<NUM>) from one side to another. Thus, each release opening (<NUM>) is configured as a through hole extending through a corresponding actuator (<NUM>).

Adjacent to release opening (<NUM>), lock end (<NUM>) of each actuator (<NUM>) is positioned on the outermost end thereof. Each lock end (<NUM>) is generally configured to block movement of a portion of a corresponding gripping feature (<NUM>). Thus, it should be understood that lock end (<NUM>) is of a generally solid configuration. As will be described in greater detail below, each actuator (<NUM>) is generally configured to transition laterally within cartridge (<NUM>) to transition engagement between a portion of gripping feature (<NUM>) and lock end (<NUM>), or the portion of gripping feature (<NUM>) and release opening (<NUM>).

To promote engagement between gripping features (<NUM>) and lock assembly (<NUM>), each gripping feature (<NUM>), each gripping feature (<NUM>) includes a lock arm (<NUM>). In particular, each lock arm extends axially or proximally through cartridge (<NUM>) from a body of each gripping feature (<NUM>) towards each actuator (<NUM>). Each lock arm (<NUM>) is generally configured as an elongate rod or beam having a cross-section corresponding to the shape of a respective release opening (<NUM>). As will be described in greater detail below, each lock arm (<NUM>) is configured for receipt within a respective release opening (<NUM>) to permit movement of gripping feature (<NUM>).

As best seen in <FIG> and <FIG>, lockout assembly (<NUM>) is generally responsive to a predetermined portion of end effector (<NUM>) to lock and unlock movement of gripping features (<NUM>). As can be seen in <FIG>, the unlocking movement of gripping features (<NUM>) permits activation of cartridge (<NUM>) by gripping features (<NUM>) to expand platform (<NUM>). Thus, lockout assembly (<NUM>) is configured to transition from a locked configuration shown in <FIG> to an unlocked configuration in <FIG>. This transition results in griping features (<NUM>) being usable to activate expansion of platform (<NUM>), as can be seen in <FIG>.

As can be seen in <FIG>, in the locked configuration, each actuator (<NUM>) of lockout assembly (<NUM>) is positioned inwardly such that each engagement portion (<NUM>) is nearly in contact (or alternatively in contact) with the opposite engagement portion (<NUM>). Correspondingly, each lock end (<NUM>) is positioned adjacent to a proximal end of a corresponding lock arm (<NUM>). Thus, each lock end (<NUM>) blocks movement of each gripping feature (<NUM>) via lock arm (<NUM>) when lockout assembly (<NUM>) is in the locked configuration. Additionally, it should be understood that lockout assembly (<NUM>) is biased by spring (<NUM>) and spring collar (<NUM>) towards the locked configuration.

Transition of lockout assembly (<NUM>) from the locked configuration to the unlocked configuration is shown in <FIG>. As can be seen, the transition of lockout assembly (<NUM>) is driven by a predetermined portion of end effector (<NUM>). In the present example, this transition is driven by cutting edge (<NUM>) of end effector (<NUM>). Use of cutting edge (<NUM>) in the present example is generally desirable because the particular shape, size, and position of cutting edge (<NUM>) can be unique to end effector (<NUM>). Thus, use of cutting edge (<NUM>) as described herein can function as a lockout feature to promote use of cartridge (<NUM>) with only certain specific end effectors corresponding to end effector (<NUM>) described above. In other words, end effectors having a different configuration than end effector (<NUM>) described above may not be useable with cartridge (<NUM>). The use of cutting edge (<NUM>) as described herein is further desirable to prevent deployment of buttress assemblies (<NUM>, <NUM>) until cartridge (<NUM>) is properly positioned within end effector (<NUM>). Although cutting edge (<NUM>) is shown and described herein as being usable to drive lockout assembly (<NUM>), it should be understood that in other examples, various alternative portions of end effector (<NUM>) can be used to drive the transition of lockout assembly (<NUM>). As will be understood, suitable portions of end effectors (<NUM>) may include any portion of end effector (<NUM>) that is unique or varied relative to other end effector configurations or styles.

Returning to the present example, lockout assembly (<NUM>) is transitioned by engagement between engagement portion (<NUM>) of each actuator (<NUM>) with cutting edge (<NUM>) of end effector (<NUM>). In particular, cartridge (<NUM>) is inserted into/onto end effector (<NUM>) (or end effector (<NUM>) is inserted into/onto cartridge (<NUM>)) to bring cutting edge (<NUM>) into contact with each engagement portion (<NUM>). This contact pushes each actuator (<NUM>) outwardly away from the opposite actuator (<NUM>) by a predetermined distance. Once this predetermined distance is reached as shown in <FIG>, each release opening (<NUM>) is positioned adjacent to the proximal end of a corresponding lock arm (<NUM>). This permits each lock arm (<NUM>) to be received within a corresponding release opening (<NUM>). As a result, each gripping feature may be translated proximally relative to housings (416a, 416b).

As shown in <FIG>, once lockout assembly (<NUM>) is transitioned to the unlocked configuration, each gripping feature (<NUM>) can be moved proximally to activate expansion of platform (<NUM>). This expansion pushes platform (<NUM>) towards upper deck (<NUM>) and anvil (<NUM>) of end effector (<NUM>) for deployment of buttress assembly (<NUM>, <NUM>) thereon. Although not shown, it should be understood that gripping features (<NUM>) can be in communication with one or more features suitable to activate expansion of platform (<NUM>). In the present example, gripping features (<NUM>) are used to drive a linkage assembly to expand platform (<NUM>). As discussed above, expansion of platform (<NUM>) can be accomplished using a variety of mechanical and/or electrical configuration.

<FIG> shows another exemplary buttress applier cartridge (<NUM>) (also referred to as a "buttress applicator") that may be used to support, protect, and apply adjunct material, such as buttress assemblies (<NUM>, <NUM>), to an end effector. Buttress applier cartridge (<NUM>) of the present example is substantially similar to buttress applier cartridge (<NUM>, <NUM>) described above except where otherwise explicitly described herein. For instance, as with cartridge (<NUM>), cartridge (<NUM>) of this example comprises a housing (not shown) defining an open end (not shown) and a closed end (not shown). A platform (<NUM>) is similarly interposed between one or more portions of the housing.

As with platform (<NUM>) described above, platform (<NUM>) of the present example is configured to support a pair of buttress assemblies (<NUM>) on one side of platform (<NUM>) and another pair of buttress assemblies (<NUM>) on the other side of platform (<NUM>). Also as with platform (<NUM>), platform (<NUM>) of the present example is generally configured to be expandable to apply buttress assemblies (<NUM>, <NUM>). To support such expandability, platform (<NUM>) includes an upper support (<NUM>), and a lower support (<NUM>) connected with a hinge (<NUM>). Upper support (<NUM>) comprises an elongate flat surface configured for support of buttress assembly (<NUM>). Meanwhile, lower support (<NUM>) also comprises an elongate flat surface configured for support of buttress assembly (<NUM>).

Upper support (<NUM>) is connected to lower support (<NUM>) at hinge (<NUM>). Hinge (<NUM>) is positioned at the proximal end of each support (<NUM>, <NUM>) such that hinge (<NUM>) is generally configured for insertion into an end effector (<NUM>), as will be described in greater detail below. Hinge (<NUM>) is generally configured to permit pivoting of upper support (<NUM>) relative to lower support (<NUM>).

Platform (<NUM>) of the present example is configured to expand automatically (e.g., without an operator pushing or pulling portions of platform (<NUM>)). To facilitate such automatic expansion, platform (<NUM>) of the present example further includes a resilient member or torsion spring (<NUM>) and a dashpot (<NUM>). Torsion spring (<NUM>) is configured to provide an outward force against upper support (<NUM>) and lower support (<NUM>) to bias platform (<NUM>) towards an expanded configuration. Meanwhile, dashpot (<NUM>) is generally configured to provide a controlled force opposite of torsion spring (<NUM>) (e.g., an inwardly oriented force). As will be understood, dashpot (<NUM>) is generally configured to act as a damper to prevent torsion spring (<NUM>) from expanding platform (<NUM>) at an undesirable rate. By way of example only, this functionality can be accomplished in some examples by configuring platform (<NUM>) or other suitable features of cartridge (<NUM>) in accordance with the teachings of <CIT>, entitled "Apparatus and Method to Apply Buttress to End Effector of Surgical Stapler via Driven Member," filed on even date herewith.

To activate expansion of platform (<NUM>), cartridge (<NUM>) of the present example further includes a release assembly (<NUM>). Release assembly (<NUM>) is generally configured to engage a predetermined portion of end effector (<NUM>) to activate expansion of platform (<NUM>) upon such engagement. Thus, release assembly (<NUM>) is similar to lockout assembly (<NUM>) described above in that release assembly (<NUM>) promotes use of cartridge (<NUM>) with only certain end effectors and also promote activation of cartridge (<NUM>) only when cartridge (<NUM>) is properly positioned within such end effectors.

Release assembly (<NUM>) of the present example comprises a probe (<NUM>) and a latch (<NUM>). Probe (<NUM>) includes a keyed end (<NUM>) and an elongate pusher (<NUM>) extending from keyed end (<NUM>). A portion of probe (<NUM>) extends proximally from hinge (<NUM>) such that keyed end (<NUM>) protrudes from a proximal end of cartridge (<NUM>). As will be described in greater detail below, the particular position of probe (<NUM>) is configured to permit engagement between keyed end (<NUM>) and a predetermined portion of end effector (<NUM>) when lower support (<NUM>) is properly seated within end effector (<NUM>).

Elongate pusher (<NUM>) extends distally from hinge (<NUM>) and keyed end (<NUM>) towards torsion spring (<NUM>) and latch (<NUM>). Elongate pusher (<NUM>) is generally responsive to movement of keyed end (<NUM>) such that movement of keyed end (<NUM>) results in corresponding movement of elongate pusher (<NUM>). As will be described in greater detail below, movement of elongate pusher (<NUM>) is configured to actuate latch (<NUM>), which releases torsion spring (<NUM>) and thereby expanding platform (<NUM>).

Latch (<NUM>) is generally configured to selectively engage torsion spring (<NUM>) to hold torsion spring (<NUM>) in a compressed configuration. In the present example, latch (<NUM>) comprises an elongate rod, or wire that includes coupler (<NUM>) and a release (<NUM>). Coupler (<NUM>) is pivotably coupled to lower support (<NUM>) to permit latch (<NUM>) to pivot relative to lower support (<NUM>). Release (<NUM>) is positioned opposite of coupler (<NUM>) as is configured to releasably engage torsion spring (<NUM>) and/or a portion of upper support (<NUM>) to hold torsion spring (<NUM>) in the compressed configuration. As will be described in greater detail below, elongate pusher (<NUM>) is generally configured to engage latch (<NUM>) to pivot latch (<NUM>) about coupler (<NUM>) to disengage release (<NUM>) from torsion spring (<NUM>) and/or a portion of upper support (<NUM>).

Although release assembly (<NUM>) is shown as having a specific configuration, it should be understood that in other examples, a variety of alternative configurations may be used. For instance, in some examples other mechanical release mechanisms can be used to permit selective expansion of platform (<NUM>) via torsion spring (<NUM>) or other mechanisms configured for storage of potential energy. In other examples, release assembly (<NUM>) can use various electrical/mechanical components such as solenoids, motors, push-buttons, sensors, and/or etc. Of course, still various other suitable configurations for release assembly (<NUM>) as will be apparent to those of ordinary skill in the art in view of the teachings herein.

As can be seen in <FIG>, cartridge (<NUM>) of the present example is configured for use with end effector (<NUM>). End effector (<NUM>) of the present example is substantially similar to end effector (<NUM>) described above except where otherwise explicitly noted herein. For instance, like with end effector (<NUM>) described above, end effector (<NUM>) of the present example employs a firing beam (<NUM>) that may be used to sever and staple tissue in a single stroke. As with firing beam (<NUM>) described above, firing beam (<NUM>) of the present example may be driven relative to an anvil (not shown) (similar to anvil (<NUM>)) and an unspent staple cartridge (not shown) (similar to staple cartridge (<NUM>)) to sever and staple tissue. As with staple cartridge (<NUM>), the staple cartridge of end effector (<NUM>) is removably installed into a channel of a lower jaw (<NUM>).

Unlike end effector (<NUM>) described above, end effector (<NUM>) of the present example includes a cartridge lockout (<NUM>) integrated into end effector (<NUM>). Lockout (<NUM>) is generally configured to mate with certain corresponding components of a staple cartridge. Such a mating arrangement moves lockout (<NUM>) into a predetermined position and unlocks certain operations of end effector (<NUM>) such as movement of firing beam (<NUM>) and closure of the anvil. Thus, it should be understood that lockout (<NUM>) is configured to prevent use of end effector (<NUM>) when no staple cartridge is installed, an improper (e.g., lacking mating features) staple cartridge is installed, or a staple cartridge is improperly installed. In some examples, lockout (<NUM>) and other associated features of end effector (<NUM>) and the staple cartridge can be configured in accordance with the teachings of <CIT>.

Use of buttress applier cartridge (<NUM>) with end effector (<NUM>) is shown in <FIG>. As can be best seen in <FIG>, cartridge (<NUM>) may be first inserted into end effector (<NUM>) to position lower support (<NUM>) into alignment with lower jaw (<NUM>) of end effector (<NUM>). The direction of insertion is such that hinge (<NUM>) and keyed end (<NUM>) are inserted into end effector (<NUM>) first towards lockout (<NUM>).

Once cartridge (<NUM>) is fully inserted into end effector (<NUM>), keyed end (<NUM>) engages a portion of lockout (<NUM>) as can be seen in <FIG>. In some examples, the particular geometry of keyed end (<NUM>) may be configured to correspond to a specific geometric feature of lockout (<NUM>) to further promote precise positioning of cartridge (<NUM>) relative to end effector (<NUM>). Regardless, upon engagement between keyed end (<NUM>) and lockout (<NUM>), keyed end (<NUM>) pushes probe (<NUM>) distally.

As best seen in <FIG>, upon distal movement of probe (<NUM>), elongate pusher (<NUM>) engages latch (<NUM>). Latch (<NUM>) is correspondingly pushed by elongate pusher (<NUM>) to pivot about coupler (<NUM>), thereby disengaging release (<NUM>) from torsion spring (<NUM>) and/or upper support (<NUM>). With torsion spring (<NUM>) released, platform (<NUM>) can expand at a controlled pace using the force applied by torsion spring (<NUM>) and dashpot (<NUM>) to apply buttress assemblies (<NUM>, <NUM>) to end effector (<NUM>).

<FIG> and <FIG> depict yet another exemplary alternative buttress applier cartridge (<NUM>) (also referred to as a "buttress applicator") that may be used to support, protect, and apply adjunct material, such as buttress assemblies (<NUM>, <NUM>), to an end effector. Buttress applier cartridge (<NUM>) of the present example is substantially similar to buttress applier cartridge (<NUM>, <NUM>, <NUM>) described above except where otherwise explicitly described herein. For instance, as with cartridge (<NUM>), cartridge (<NUM>) of this example comprises a housing (<NUM>) defining an open end (<NUM>) and a closed end (<NUM>). A platform (<NUM>) is similarly interposed between one or more portions of the housing.

As with platform (<NUM>) described above, platform (<NUM>) of the present example is configured to support a pair of buttress assemblies (<NUM>) on one side of platform (<NUM>) and another pair of buttress assemblies (<NUM>) on the other side of platform (<NUM>). Also as with platform (<NUM>), platform (<NUM>) of the present example is generally configured to be expandable to apply buttress assemblies (<NUM>, <NUM>). To support such expandability, platform (<NUM>) includes certain mechanisms generally configured to promote expansion thereof. By way of example only, platform (<NUM>) of the present example includes an expandable wedge driven by a linkage mechanism similar to platform (<NUM>) described above. However, it should be understood that in other examples, other suitable mechanisms may be used such as an expandable balloon, a spring-loaded wedge, a lead screw driven mechanism, and/or etc. In still other examples, platform (<NUM>) may be configured in accordance with one or more of the teachings of <CIT>, entitled "Apparatus and Method to Apply Buttress to End Effector of Surgical Stapler via Driven Member," filed on even date herewith.

Unlike platform (<NUM>) described above, expandability of platform (<NUM>) in the present example is motor driven rather than being manually driven by an operator. In particular, as best seen in <FIG>, the interior of cartridge (<NUM>) includes a motor (<NUM>), a power source (<NUM>), and a switch (<NUM>), all incorporated into a circuit. Although not shown, it should be understood that motor (<NUM>) of the present example may be in communication with one or more features of platform (<NUM>) to drive expansion of platform (<NUM>). For instance, as noted above, platform (<NUM>) of the present example can use a linkage mechanism to provide expansion thereof. Thus, in such an example, motor (<NUM>) can be configured to rotate a lead screw or other drive mechanism to move platform (<NUM>) from a flat configuration to an expanded configuration. Of course, in other configurations where alternative expansion mechanisms are used, motor (<NUM>) may be varied as needed. For instance, in some examples motor (<NUM>) can include a vacuum pump, a linear actuator, and/or etc..

Switch (<NUM>) is in communication with motor (<NUM>) and power source (<NUM>) to selectively activate and deactivate power supplied to motor (<NUM>) via power source (<NUM>). Power source (<NUM>) of the present example is shown as a battery, although any other suitable source of power may be used including direct and/or alternating current sources. Although not shown, it should be understood that motor (<NUM>), power source (<NUM>) and switch (<NUM>) can be connected to other electrical circuitry such as microcontrollers, controllers, relays, diodes, capacitors, inductors, resistors, inverters, and/or etc..

Returning to <FIG>, cartridge (<NUM>) further includes an RFID module (<NUM>). As will be described in greater detail below, RFID module (<NUM>) is generally configured to respond to one or more corresponding RFID components of end effector (<NUM>). This relationship is generally desirable to provide both confirmation that cartridge (<NUM>) is used with a suitable end effector similar to end effector (<NUM>), and confirmation that cartridge (<NUM>) is properly positioned prior to deployment of buttress assemblies (<NUM>, <NUM>) via platform (<NUM>).

As can be seen, RFID module (<NUM>) is in communication with switch (<NUM>). In the present example, RFID module (<NUM>) is configured to trip or otherwise actuate switch between an open and closed circuit configuration. As will be understood, this configuration permits RFID module (<NUM>) to activate motor (<NUM>) and thereby expand platform (<NUM>) for deployment of buttress assemblies (<NUM>, <NUM>) only when RFID module (<NUM>) is in proximity with certain corresponding features of end effector (<NUM>).

RFID module (<NUM>) of the present example is positioned adjacent to the proximal end of cartridge (<NUM>) proximate open end (<NUM>). Although only a single RFID module (<NUM>) is visible, it should be understood that an additional RFID module (<NUM>) may be disposed on each side of cartridge (<NUM>) (e.g., one on the side out of the page in <FIG> and one on the side into the page in <FIG>). As will be described in greater detail below, this proximal positioning is generally desirable to confirm proper positioning of cartridge (<NUM>) within end effector (<NUM>). In other examples, any suitable number of RFID modules (<NUM>) may be used. For instance, in some examples, four RFID modules (<NUM>) can be used with two on the proximal end of cartridge (<NUM>) and two on the distal end of cartridge (<NUM>). Such a configuration may be desirable to provide improved position confirmation. Thus, in other examples, even more RFID modules (<NUM>) may be used as will be apparent to those of ordinary skill in the art in view of the teachings herein. Additionally, it should be understood that in examples where multiple RFID modules (<NUM>) are used, all such RFID modules (<NUM>) may be in communication with switch (<NUM>) such that all RFID models (<NUM>) may be used to transition switch (<NUM>) between the open and closed circuit configurations.

As seen in <FIG>, cartridge (<NUM>) is usable with end effector (<NUM>). End effector (<NUM>) of the present example is substantially similar to end effector (<NUM>) described above except where otherwise explicitly noted herein. For instance, like with end effector (<NUM>) described above, end effector (<NUM>) of the present example employs a firing beam (<NUM>) that may be used to sever and staple tissue in a single stroke. As with firing beam (<NUM>) described above, firing beam (<NUM>) of the present example may be driven relative to an anvil (<NUM>) and an unspent staple cartridge (<NUM>) to sever and staple tissue. As with staple cartridge (<NUM>), staple cartridge (<NUM>) is removably installed into a channel of a lower jaw (<NUM>).

Unlike end effector (<NUM>) described above, end effector (<NUM>) of the present example includes an RFID module (<NUM>) positioned adjacent to the crotch formed by anvil (<NUM>) and lower jaw (<NUM>). RFID module (<NUM>) of end effector (<NUM>) is generally configured to communicate with RFID module (<NUM>) of cartridge (<NUM>). By way of example only, RFID module (<NUM>) of end effector (<NUM>) is configured as an RFID sensor or antenna. Meanwhile, RFID module (<NUM>) of cartridge (<NUM>) is configured as an RFID chip or transmitter for transmission of radio frequencies to RFID module (<NUM>) of end effector (<NUM>). Of course, in other examples, this configuration can be reversed and RFID module (<NUM>) can be configured as a chip or transmitter, while RFID module (<NUM>) can be configured as a sensor or antenna.

Although end effector (<NUM>) of the present example is shown as having a single RFID module (<NUM>), it should be understood that in other examples, end effector (<NUM>) can include any suitable number of RFID modules (<NUM>). For instance, in some examples, an array of RFID modules (<NUM>) can be used in end effector (<NUM>), with groups of RFID modules (<NUM>) being configured to serve certain specific purposes. In such configurations, one group of RFID modules (<NUM>) may be used to detect and authenticate the presence of a specific staple cartridge similar to staple cartridge (<NUM>). Meanwhile, another group of RFID modules (<NUM>) may be used to detect and authenticate the presence of a specific buttress applier cartridge similar to buttress applier cartridge (<NUM>). Still another group of RFID modules (<NUM>) may be used to detect other and authenticate the presence (or lack thereof) of other ancillary components such as staple cartridge retainer. In some examples, suitable configurations for RFID module (<NUM>) may be in accordance with at least some of the teachings of <CIT>.

An exemplary use of the present example is shown in <FIG>. As can be seen, end effector (<NUM>) is initially moved relatively to cartridge (<NUM>) to insert cartridge (<NUM>) into end effector (<NUM>). <FIG> shows switch (<NUM>) of cartridge (<NUM>) as being in the open configuration during insertion. This open configuration corresponds to platform (<NUM>) being in a non-expanded configuration. Although not shown, it should be understood that in some uses, end effector (<NUM>) may be electronically locked prior to and during insertion of cartridge (<NUM>). For instance, RFID module (<NUM>) may generate a signal corresponding to cartridge (<NUM>) not being detected. This signal may then be communicated with electronic circuity within end effector (<NUM>) or other portions of the instrument (not shown) to physically or electronically lock portions of the instrument or end effector (<NUM>) from moving (e.g., to prevent distal advancement of firing beam (<NUM>)).

Once cartridge (<NUM>) is fully inserted into end effector (<NUM>), RFID module (<NUM>) of cartridge (<NUM>) is adjacent to RFID module (<NUM>) of end effector (<NUM>) as can be seen in <FIG>. RFID module (<NUM>) then responds to the presence of RFID module (<NUM>) by transitioning switch (<NUM>) from the open configuration to the closed configuration as shown in <FIG>. This transition of switch (<NUM>) causes motor (<NUM>) to activate and thereby expand platform (<NUM>), which results in application of buttress assemblies (<NUM>, <NUM>) to anvil (<NUM>) and staple cartridge (<NUM>) of end effector (<NUM>).

In some uses, RFID module (<NUM>) may also respond to the presence of RFID module (<NUM>). For instance, RFID module (<NUM>) may generate one or more signals upon detection of the presence of RFID module (<NUM>). Such signals may then be transmitted to other portions of end effector (<NUM>) or the instrument to release or otherwise disengage certain lockout features. Alternatively, such lockout features may remain active, but may be disengaged after either a predetermined amount of time or until the presence of RFID module (<NUM>) is no longer detected.

<FIG> depicts yet another exemplary alternative buttress applier cartridge (<NUM>) (also referred to as a "buttress applicator") that may be used to support, protect, and apply adjunct material, such as buttress assemblies (<NUM>, <NUM>), to an end effector. Buttress applier cartridge (<NUM>) of the present example is substantially similar to buttress applier cartridge (<NUM>, <NUM>, <NUM>, <NUM>) described above except where otherwise explicitly described herein. For instance, as with cartridge (<NUM>), cartridge (<NUM>) of this example comprises a housing (<NUM>) defining an open end (<NUM>) and a closed end (<NUM>). A platform (<NUM>) is similarly interposed between one or more portions of housing (<NUM>).

Unlike platform (<NUM>) described above, expandability of platform (<NUM>) in the present example is motor driven rather than being manually driven by an operator. In particular, as best seen in <FIG>, cartridge (<NUM>) includes a power input or keyed driver (<NUM>). Power input (<NUM>) is shown as being in communication with one or more features of platform (<NUM>) to drive expansion of platform (<NUM>). Such features of platform (<NUM>) can be driven by power input (<NUM>) in a variety of ways. For instance, as noted above, platform (<NUM>) of the present example can use a linkage mechanism to provide expansion thereof. Thus, in such an example, power input (<NUM>) can be configured to rotate a lead screw or other drive mechanism to move platform (<NUM>) from a flat configuration to an expanded configuration. Of course, in other configurations where alternative expansion mechanisms are used, power input (<NUM>) may be varied as needed. For instance, in some examples power input (<NUM>) can include a vacuum pump, a linear actuator, and/or etc..

Power input (<NUM>) is configured to communicate with certain features of an end effector (<NUM>). As will be described in greater detail below, in some examples, end effector (<NUM>) can include certain power output or rotary drive features that can be used to power, drive, or actuate certain accessory components configured for use with end effector (<NUM>). Accordingly, it should be understood that cartridge (<NUM>) of the present example does not need an internal power source to operate. Instead, cartridge (<NUM>) can be driven by an external power source including, but not limited to, certain rotary drive components integrated into end effector (<NUM>).

Unlike end effector (<NUM>) described above, end effector (<NUM>) of the present example includes a power output or rotary driver (<NUM>) positioned adjacent to the crotch formed by anvil (<NUM>) and lower jaw (<NUM>). Power output (<NUM>) of end effector (<NUM>) is generally configured to engage power input (<NUM>) of cartridge (<NUM>) to transfer power from end effector (<NUM>) to cartridge (<NUM>). By way of example only, power output (<NUM>) of the present example is configured to communicate rotary motion to cartridge (<NUM>) via power input (<NUM>). As best seen in <FIG>, both power input (<NUM>) and power output (<NUM>) are keyed relative to each other to facilitate communication of such rotary motion.

Although power input (<NUM>) and power output (<NUM>) of the present example are configured for communication of mechanical rotary power, it should be understood that in other examples various forms of energy can be communicated between power input (<NUM>) and power output (<NUM>). For instance, in some examples, power output (<NUM>) may be configured to transmit translational motion to power input (<NUM>). In other examples, power output (<NUM>) may be configured to transmit electrical, hydraulic, or pneumatic power to power input (<NUM>). In such examples, cartridge (<NUM>) can include other components suitable to use such electrical, hydraulic, or pneumatic power such as motors, pumps, valves, filters, and/or etc. Of course, in still other examples, various alternative power transfer mechanisms may be used as will be apparent to those of ordinary skill in the art in view of the teachings herein.

<FIG> show an exemplary use of buttress applier cartridge (<NUM>) with end effector (<NUM>). As can be seen in <FIG>, cartridge (<NUM>) and end effector (<NUM>) are initially separated. In the position, platform (<NUM>) is in the flat configuration. In addition, power input (<NUM>) is not in communication with power output (<NUM>), so platform (<NUM>) cannot be transitioned to the expanded configuration. Thus, when cartridge (<NUM>) and end effector (<NUM>) are initially separated, power input (<NUM>) and power output (<NUM>) functionally act as a functional lockout feature to prevent inadvertent or premature deployment of buttress assemblies (<NUM>, <NUM>).

Next, as can be seen in <FIG>, cartridge (<NUM>) is moved into position within end effector (<NUM>) by either moving end effector (<NUM>) relative to cartridge (<NUM>) or cartridge relative to end effector (<NUM>). In this position, open end (<NUM>) of cartridge (<NUM>) is inserted into end effector (<NUM>) to permit engagement between power input (<NUM>) and power output (<NUM>). Once power input (<NUM>) and power output (<NUM>) are engaged, platform (<NUM>) can be expanded by rotating power input (<NUM>) via power output (<NUM>) to deploy buttress assemblies (<NUM>, <NUM>) onto anvil (<NUM>) and staple cartridge (<NUM>). Because engagement between power input (<NUM>) and power output (<NUM>) is needed for expansion of platform (<NUM>), it should be understood that power input (<NUM>) and power output (<NUM>) act as an alignment features to promote proper placement of buttress assemblies (<NUM>, <NUM>).

In some uses, power output (<NUM>) may be incorporated into the drive for firing beam (<NUM>) and/or other operational components of end effector (<NUM>). In such examples, it should be understood that power output (<NUM>) may rotate in one direction to drive firing beam (<NUM>) and/or other operational components of end effector (<NUM>). Meanwhile, power output (<NUM>) may rotate in an opposite direction to drive expansion of platform (<NUM>) via power input (<NUM>). In some examples, such an operational feature may be desirable to prevent inadvertent operation of end effector (<NUM>) (e.g., firing of firing beam (<NUM>)) prematurely such as during deployment of buttress assemblies (<NUM>, <NUM>).

<FIG> shows another exemplary buttress applier cartridge (<NUM>) (also referred to as a "buttress applicator") that may be used to support, protect, and apply adjunct material, such as buttress assemblies (<NUM>, <NUM>), to an end effector. Buttress applier cartridge (<NUM>) of the present example is substantially similar to buttress applier cartridge (<NUM>) described above except where otherwise explicitly described herein. For instance, as with cartridge (<NUM>), cartridge (<NUM>) of this example comprises a platform (<NUM>) configured to expand or otherwise move to apply buttress assemblies (<NUM>, <NUM>) to an end effector. Although not shown, it should be understood that in other examples, cartridge (<NUM>) may also include other additional features similar to housing.

Unlike platform (<NUM>) described above, platform (<NUM>) of the present example is configured to expand manually through actuation by an operator. To facilitate such manual expansion, platform (<NUM>) of the present example further includes a manipulation tab (<NUM>) and a lock tab (<NUM>). Manipulation tab (<NUM>) extends distally from upper support (<NUM>) and is generally configured for gasping by an operator to manually pull or otherwise manipulate upper support (<NUM>) about hinge (<NUM>).

Lock tab (<NUM>) extends distally from lower support (<NUM>). As will be described in greater detail below, lock tab (<NUM>) is generally configured to fasten to staple cartridge (<NUM>) of end effector (<NUM>) to secure lower support (<NUM>) to staple cartridge (<NUM>). To facilitate such fastening, lock tab (<NUM>) is generally shaped to correspond to the shape of the distal end of staple cartridge (<NUM>). In addition, lock tab (<NUM>) includes a lock tooth (<NUM>) extending proximally from a distal end of lock tab (<NUM>). As will be understood, lock tooth (<NUM>) is generally configured to engage a portion of staple cartridge (<NUM>) to releasably secure lock tab (<NUM>) to staple cartridge (<NUM>).

Platform (<NUM>) further includes an upper insert (<NUM>) and a lower insert (<NUM>) extending from upper support (<NUM>) and lower support (<NUM>), respectively. As will be described in greater detail below, both upper insert (<NUM>) and lower insert (<NUM>) are configured to engage portions of end effector (<NUM>)/staple cartridge (<NUM>) to provide a locating feature or mechanical ground to ensure proper positioning of cartridge (<NUM>) within end effector (<NUM>). Lower support (<NUM>) is additionally beneficial to detect certain features of end effector (<NUM>) (e.g., wedge sled (<NUM>)) to prevent use of cartridge (<NUM>) with end effector (<NUM>) in an improper state (e.g., after firing of wedge sled (<NUM>)).

Upper insert (<NUM>) extends upwardly from an upper surface of upper support (<NUM>). The particular size and shape of upper insert (<NUM>) is generally configured to permit receipt of upper insert (<NUM>) into longitudinal anvil slot (<NUM>) of anvil (<NUM>). As will be understood, this configuration permits upper insert (<NUM>) to ensure proper positioning of upper support (<NUM>) relative to anvil (<NUM>) for proper application of buttress assembly (<NUM>). In other words, upper insert (<NUM>) is configured to act similarly to a go-no-go gauge to prevent application of buttress assembly (<NUM>) when cartridge (<NUM>) is mis-aligned or used with an improper end effector (<NUM>) entirely.

Lower insert (<NUM>) extends downwardly from a lower surface of lower support (<NUM>). The particular size and shape of lower insert (<NUM>) is generally configured to permit receipt of lower insert (<NUM>) into vertical slot (<NUM>) of staple cartridge (<NUM>). As will be understood, this configuration permits lower insert (<NUM>) to ensure proper positioning of lower support (<NUM>) relative to staple cartridge (<NUM>). In addition, lower insert (<NUM>) is configured to prevent use of cartridge (<NUM>) when staple cartridge (<NUM>) is in a fired state. As will be understood, this functionality is generally provided by lower insert (<NUM>) being shaped to avoid wedge sled (<NUM>) when wedge sled (<NUM>) is in a home or unfired position. Meanwhile, lower insert (<NUM>) is also shaped to contact wedge sled (<NUM>) when wedge sled (<NUM>) is in a fired position to thereby block full insertion of cartridge (<NUM>) into end effector (<NUM>).

<FIG> show an exemplary use of cartridge (<NUM>) with end effector (<NUM>) to apply buttress assemblies (<NUM>, <NUM>) to end effector (<NUM>)/staple cartridge (<NUM>). As can be seen in <FIG>, cartridge (<NUM>) can initially be installed onto staple cartridge (<NUM>) prior to insertion of staple cartridge (<NUM>) into lower jaw (<NUM>) of end effector (<NUM>). Cartridge (<NUM>) can be installed onto staple cartridge (<NUM>) by inserting lower inert (<NUM>) into vertical slot (<NUM>) of staple cartridge (<NUM>) and then snapping lock tab (<NUM>) onto the distal end of staple cartridge (<NUM>). Incidentally, the step of installing cartridge (<NUM>) onto staple cartridge (<NUM>) may also include application of buttress assembly (<NUM>) to upper deck (<NUM>) of staple cartridge (<NUM>).

Although the present use shows cartridge (<NUM>) being installed onto staple cartridge (<NUM>) prior to insertion of staple cartridge (<NUM>) into lower jaw (<NUM>) of end effector (<NUM>), it should be understood that in other uses, staple cartridge (<NUM>) may be readily inserted into lower jaw (<NUM>) first. In such an alternative use, cartridge (<NUM>) may then be installed onto staple cartridge (<NUM>) once staple cartridge (<NUM>) is inserted into lower jaw (<NUM>).

Regardless of the particular order of installation of cartridge (<NUM>) to staple cartridge (<NUM>) and staple cartridge (<NUM>) to lower jaw (<NUM>), once both components are installed, upper support (<NUM>) of cartridge (<NUM>) may be used to apply buttress assembly (<NUM>). In particular, and as best seen in <FIG>, buttress assembly (<NUM>) can be applied by an operator grasping manipulation tab (<NUM>) and pivoting upper support (<NUM>) about hinge (<NUM>) upwardly towards anvil (<NUM>). Upper insert (<NUM>) can then be received by longitudinal anvil slot (<NUM>) to ensure proper alignment between upper support (<NUM>) and anvil (<NUM>). Upon receipt of upper insert (<NUM>) into longitudinal anvil slot (<NUM>), upper support (<NUM>) may be further pivoted about hinge (<NUM>) to apply buttress assembly (<NUM>) to anvil (<NUM>).

After buttress assembly (<NUM>) is applied to anvil (<NUM>) as described above, cartridge (<NUM>) can be removed from end effector (<NUM>) as shown in <FIG>. With cartridge (<NUM>) removed, end effector (<NUM>) may then be used in a procedure.

In some buttress applier cartridges similar to buttress applier cartridge (<NUM>) described above, it may be desirable to include certain features to prevent or discourage reuse of the cartridge after application of buttress assemblies (<NUM>, <NUM>). <FIG> shows an exemplary alternative buttress applier cartridge (<NUM>) that is substantially similar to buttress applier cartridge (<NUM>) described above unless otherwise explicitly described herein. For instance, like with cartridge (<NUM>), cartridge (<NUM>) of this example includes a platform (<NUM>) having an upper support (<NUM>) and a lower support (<NUM>). Although not shown, it should be understood that upper support (<NUM>) and lower support (<NUM>) may include structures similar manipulation tab (<NUM>), lock tab (<NUM>), upper insert (<NUM>) and lower insert (<NUM>).

Cartridge (<NUM>) also includes a hinge (<NUM>) similar to hinge (<NUM>) described above. However, unlike hinge (<NUM>), hinge (<NUM>) of the present example includes a one-way stop (<NUM>). One-way stop (<NUM>) is generally configured to act as a ratchet mechanism by permitting hinge (<NUM>) to open, while preventing complete re-closure after opening. In the present example, one-way stop (<NUM>) is configured as a protrusion or detent feature integrated into a portion of hinge (<NUM>) to permit rotation of upper support (<NUM>) in one direction, but prevent rotation of upper support (<NUM>) in another direction after upper support (<NUM>) has passed a certain predetermined point of rotation.

Although one-way stop (<NUM>) is shown in the present example as being integrated into hinge (<NUM>), it should be understood that in other examples, one-way stop (<NUM>) can be readily integrated into other components of cartridge (<NUM>). Alternatively, in other examples, one-way stop (<NUM>) can be an entirely separate component attached to one or more elements of cartridge (<NUM>). Various alternative configurations for one-way stop (<NUM>) will be apparent to those of ordinary skill in the art in view of the teachings herein.

In use, cartridge (<NUM>) can be used as similarly described above with respect to cartridge (<NUM>). For instance, cartridge (<NUM>) can be first installed onto staple cartridge (<NUM>). The combination of cartridge (<NUM>) and staple cartridge (<NUM>) can then be inserted into lower jaw (<NUM>) of end effector (<NUM>). Upper support (<NUM>) can then be pivoted about hinge relative to lower support (<NUM>) to apply buttress assembly (<NUM>). However, unlike the use described above, it should be understood that once support (<NUM>) is pivoted past a certain point, one-way stop (<NUM>) functions to prevent pivoting in the reverse direction. Thus, upon removal of cartridge (<NUM>) after application of buttress assemblies (<NUM>, <NUM>), cartridge (<NUM>) may remain in an at least partially open state to provide an affirmative indication of previous use and thereby discourage reuse thereof. Although one-way stop (<NUM>) prevents some reverse pivoting of upper support (<NUM>), it should be understood that at least some reverse pivoting may still be permitted to permit removal of cartridge (<NUM>) from end effector (<NUM>) after application of buttress assemblies (<NUM>, <NUM>).

In examples, it may be desirable to use buttress assemblies (<NUM>, <NUM>) described above with a single-use pre-applied liner. Such a liner may be desirable to protect buttress assemblies (<NUM>, <NUM>) until application thereof onto an end effector. As can be seen in <FIG> shows buttress applier cartridge (<NUM>) described above with an added liner (<NUM>) disposed over buttress assembly (<NUM>). Although liner (<NUM>) is described herein as being used with cartridge (<NUM>), it should be understood that liner (<NUM>) described below can be alternatively used with any other cartridge (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) described herein.

Liner (<NUM>) of the present example is a single material covering that is configured to cover buttress assembly (<NUM>). In the present example, liner (<NUM>) comprises a material of paper or polymer. In other examples, various alterative materials can be used. Additionally, in addition or in the alternative, such materials of liner (<NUM>) can be coated with one or more coating layers of various materials such as wax, polymer, alloy, combinations of different materials, and/or etc..

Liner (<NUM>) includes a cover portion (<NUM>) and an excess portion (<NUM>). Cover portion (<NUM>) corresponds to the size and shape of buttress assembly (<NUM>) to cover buttress assembly (<NUM>). Meanwhile, excess portion (<NUM>) extends proximally from buttress assembly (<NUM>). As will be described in greater detail below, excess portion (<NUM>) is generally configured to engage a portion of end effector (<NUM>) to provide a visual cue for removal of liner (<NUM>).

<FIG> show an exemplary use of cartridge (<NUM>) with liner (<NUM>). It should be understood that use of cartridge (<NUM>) with liner (<NUM>) is substantially similar to the use described above with respect to <FIG>, unless otherwise explicitly described herein. For instance, as described above, cartridge (<NUM>) may be first installed onto staple cartridge (<NUM>) and then both cartridge (<NUM>) and staple cartridge (<NUM>) can be inserted into lower jaw (<NUM>) of end effector (<NUM>). However, unlike the use described above, in the use here, liner (<NUM>) is pre-applied to cartridge (<NUM>) such that liner (<NUM> is also inserted into lower jaw (<NUM>) along with cartridge (<NUM>) and staple cartridge (<NUM>) as can be seen in <FIG>.

As cartridge (<NUM>) is inserted into lower jaw (<NUM>), excess portion (<NUM>) engages the crotch of end effector (<NUM>) formed at the intersection of lower jaw (<NUM>) and anvil (<NUM>). This engagement causes excess portion (<NUM>) of liner (<NUM>) to compact, roll, or bunch-up in the space between the crotch of end effector (<NUM>) and buttress assembly (<NUM>). This change of excess portion (<NUM>) may provide an operator with a visual cue to remind the operator to remove liner (<NUM>) prior to proceeding. Although not show, it should be understood that in some examples such functionality of excess portion (<NUM>) can be added by excess portion (<NUM>) including a T-shaped or otherwise expanded proximal end to avoid the possibility of excess portion (<NUM>) remaining longitudinally extended by entering portions of end effector (<NUM>).

Liner (<NUM>) can next be removed by an operator gasping excess portion (<NUM>) or other portions of liner (<NUM>) configured to aid removal (e.g., a removal tab). Once liner (<NUM>) is removed, buttress assembly (<NUM>) can then be applied to anvil (<NUM>) by an operator gasping manipulation tab (<NUM>) and pivoting upper support (<NUM>) as similarly described above with respect to <FIG>. Cartridge (<NUM>) can then be removed and end effector (<NUM>) can be readily used in a procedure.

Furthermore, any one or more of the teachings herein may be combined with any one or more of the teachings disclosed in <CIT>, entitled "Apparatus and Method to Apply Buttress to End Effector of Surgical Stapler via Fixed Base," filed on even date herewith; <CIT>, entitled "Apparatus and Method to Apply Buttress to End Effector of Surgical Stapler via Driven Member," filed on even date herewith; <CIT>, entitled "Apparatus and Method to Apply Buttresses Separately to Jaws of End Effector of Surgical Stapler," filed on even date herewith; <CIT>, entitled "Apparatus and Method to Close End Effector of Surgical Stapler onto Buttress," filed on even date herewith; <CIT>, entitled "Apparatus and Method to Detect Full Seating of Buttress Applicator in End Effector of Surgical Stapler," filed on even date herewith; and/or <CIT>, entitled "Method of Applying Buttress to End Effector of Surgical Stapler," filed on even date herewith.

Claim 1:
An apparatus (<NUM>, <NUM>, <NUM>) comprising:
(a) a platform (<NUM>, <NUM>, <NUM>) including an upper support (<NUM>) and a lower support (<NUM>);
(b) an adjunct material (<NUM>) positioned on the upper support (<NUM>), wherein the upper support (<NUM>) is configured to move relative to the lower support (<NUM>) in a direction toward a jaw of an end effector (<NUM>, <NUM>, <NUM>) of a surgical stapler to apply the adjunct material (<NUM>) to the jaw; and
(c) an engagement feature (<NUM>, <NUM>, <NUM>), wherein the engagement feature (<NUM>, <NUM>, <NUM>) is configured to interact with a predetermined portion (<NUM>, <NUM>, <NUM>) of the end effector (<NUM>, <NUM>, <NUM>) to permit movement of the upper support (<NUM>) relative to the lower support (<NUM>) and thereby apply the adjunct material (<NUM>) to the jaw of the end effector, characterised in that the engagement feature (<NUM>, <NUM>, <NUM>) is configured to inhibit movement of the upper support (<NUM>) relative to the lower support (<NUM>) when the engagement feature (<NUM>, <NUM>, <NUM>) is disengaged from the predetermined portion (<NUM>, <NUM>, <NUM>) of the end effector (<NUM>, <NUM>, <NUM>).