Patent Description:
Ultrasonic surgical instruments are used in many applications in surgical procedures by virtue of their unique performance characteristics. In various instances, ultrasonic surgical instruments can be configured for use in open, laparoscopic, or endoscopic surgical procedures. Ultrasonic surgical instruments can be also configured for use in robotic-assisted surgical procedures. <CIT> relates to an ultrasonic probe which is used in an ultrasonic treatment device, and which is configured to perform longitudinal vibration having a vibration direction parallel to a central axis when ultrasonic vibration is transmitted thereto, and a manufacturing method of the ultrasonic probe. <CIT> relates to ultrasonic devices and, more particularly, to methods and devices that provide curved blades with reduced undesired lateral and torsion motion. <CIT> relates to an ultrasonic surgical tool, such as an ultrasonic laparoscopic tool for cutting soft body tissues. More particularly, but not exclusively, it relates to such a tool having an operative tip that is profiled to improve the ergonomics of its use.

The features of the various embodiments are set forth with particularity in the appended claims. The various embodiments, however, both as to organization and methods of operation, together with advantages thereof, may best be understood by reference to the following description, taken in conjunction with the accompanying drawings as follows:.

The invention is defined in the independent claim and other embodiments are listed in the dependent claims.

Numerous specific details are set forth to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. Well-known operations, components, and elements have not been described in detail so as not to obscure the embodiments described in the specification. The reader will understand that the embodiments described and illustrated herein are non-limiting examples, and thus it can be appreciated that the specific structural and functional details disclosed herein may be representative and illustrative. Variations and changes thereto may be made without departing from the scope of the claims.

The terms "comprise" (and any form of comprise, such as "comprises" and "comprising"), "have" (and any form of have, such as "has" and "having"), "include" (and any form of include, such as "includes" and "including") and "contain" (and any form of contain, such as "contains" and "containing") are open-ended linking verbs. As a result, a surgical system, device, or apparatus that "comprises," "has," "includes" or "contains" one or more elements possesses those one or more elements, but is not limited to possessing only those one or more elements. Likewise, an element of a system, device, or apparatus that "comprises," "has," "includes" or "contains" one or more features possesses those one or more features, but is not limited to possessing only those one or more features.

The terms "proximal" and "distal" are used herein with reference to a clinician manipulating the handle portion of the surgical instrument. The term "proximal" referring to the portion closest to the clinician and the term "distal" referring to the portion located away from the clinician. It will be further appreciated that, for convenience and clarity, spatial terms such as "vertical", "horizontal", "up", and "down" may be used herein with respect to the drawings. However, surgical instruments are used in many orientations and positions, and these terms are not intended to be limiting and/or absolute.

Various exemplary devices and methods are provided for performing laparoscopic and minimally invasive surgical procedures. However, the reader will readily appreciate that the various methods and devices disclosed herein can be used in numerous surgical procedures and applications including, for example, in connection with open surgical procedures. As the present Detailed Description proceeds, the reader will further appreciate that the various instruments disclosed herein can be inserted into a body in any way, such as through a natural orifice, through an incision or puncture hole formed in tissue, etc. The working portions or end effector portions of the instruments can be inserted directly into a patient's body or can be inserted through an access device that has a working channel through which the end effector and elongated shaft of a surgical instrument can be advanced.

Referring generally to <FIG>, an ultrasonic blade <NUM> is depicted in various perspective views taken at approximately <NUM>° intervals as the blade is rotated in the counterclockwise direction. The ultrasonic blade <NUM> comprises a body <NUM> that generally protrudes, or extends, from a base <NUM> in a distal direction terminating in a blunt, or at least substantially blunt, tip <NUM>. The body <NUM> generally includes a first face <NUM> and a second face <NUM> opposite, or at least substantially opposite, the first face <NUM>. The reader will appreciate that the blunt tip <NUM> can be fine but sufficiently atraumatic to allow for improved otomty creation and separation of tissue planes.

The first face <NUM> may include a tissue-treating surface <NUM>, a first side wall <NUM>, and a second side wall <NUM>, as best illustrated in <FIG>. The second face <NUM> includes a first tissue-cutting surface <NUM> and a second tissue-cutting surface <NUM> intersecting at a cutting edge <NUM>, as best illustrated in <FIG>. A first intermediate wall <NUM> may extend, at least partially, between the first side wall <NUM> and the first tissue-cutting surface <NUM>, as best illustrated in <FIG>. A second intermediate wall <NUM> may extend, at least partially, between the second side wall <NUM> and the second tissue-cutting surface <NUM>, as best illustrated in <FIG>.

The side walls <NUM>, <NUM> extend, or substantially extend, on opposite sides of the tissue-treating surface <NUM>, as best illustrated in <FIG>. In one embodiment, as illustrated in <FIG>, the tissue-treating surface <NUM> is beveled, or shaved, by the side walls <NUM>, <NUM>, which causes the tissue-treating surface <NUM> to be tapered, or narrowed, to a distal end <NUM> at a position proximal to the blunt tip <NUM>. Said another way, the tissue-treating surface <NUM> is defined between two contour lines <NUM>, <NUM> that extend proximally from the distal end <NUM>. The first contour line <NUM> extends between the first side wall <NUM> and the tissue-treating surface <NUM>. And, the second contour line <NUM> extends between the second side wall <NUM> and the tissue-treating surface <NUM>. The contour lines <NUM>, <NUM> follow separate and generally curved paths that intersect at the distal end <NUM>.

The tissue-treating surface <NUM> can be flat, or at least substantially flat, such that the contour lines <NUM>, <NUM> may extend, or substantially extend, in a single plane. The flatness of the tissue-treating surface <NUM> can facilitate using the tissue-treating surface <NUM> as a tissue sealing surface for sealing tissue captured against the tissue-treating surface <NUM>. A significant advantage of the blade <NUM> is its ability to seal relatively large blood vessel such as, vessels comprising a diameter in the order of <NUM>, for example, with relatively short transection time such as, for example, <NUM> seconds. The one or both of the contour lines <NUM>, <NUM> can be in the form of a sharp edge. Alternatively, one or both of the contour lines <NUM>, <NUM> can be in the form of shaved to yield a smooth transition from the side walls <NUM>, <NUM> to the tissue-treating surface <NUM>.

In the remaining distance between the distal end <NUM> and the blunt tip <NUM>, the side walls <NUM>, <NUM> may directly intersect, or at least partially intersect, each other, for example. In other embodiments, the distal end <NUM> can be positioned at the blunt tip <NUM>, or just proximal to the blunt tip <NUM>. In at least one embodiment, the distal end <NUM> can be positioned closer to the blunt tip <NUM> than the base <NUM>,as illustrated in <FIG>. In at least one embodiment, the position of the distal end <NUM> can be equidistant between the blunt tip <NUM> and the base <NUM>, for example.

An angle α1 can be defined between contour lines <NUM>, <NUM>, as illustrated in <FIG>. The angle α1 can be any angle selected from a range of about <NUM>° to about <NUM>°, for example. In one example, the angle α1 can be any angle selected from a range of about <NUM>° to about <NUM>°. In one example, the angle α1 can be about <NUM>°.

Referring to <FIG>, a longitudinal cross-section of the blade <NUM> is depicted. The blade <NUM>, as illustrated in <FIG>, has a length L1, and includes a straight, or a substantially straight, portion <NUM> comprising a length L2, and a curved, or arcuate, portion <NUM> comprising a length L3. As illustrated in <FIG>, the length L1 of the blade <NUM> is measured from the base <NUM> to the blunt tip <NUM>. In certain instances, the length L1 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the length L1 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the length L1 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the length L1 can be about <NUM> inch, for example.

The unit inch (") has the following transformation in SI units: <NUM> inch = <NUM>.

In certain instances, the length L2 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the length L2 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the length L1 can be about <NUM> inch, for example.

In certain instances, the length L3 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the length L2 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the length L3 can be about <NUM> inch, for example.

In certain instances, the length L3 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the length L3 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the length L3 can be about <NUM> inch, for example. Other values for the lengths L1, L2, and/or L3 are contemplated by the present disclosure.

Referring again to <FIG>, the blade <NUM> may comprise a width W1 at the base <NUM>, a maximum width W2 at an inflection region <NUM>, which is a distance L4 from the proximal end of the base <NUM>, and a minimum width W3 at the blunt tip <NUM>. As illustrated in <FIG>, the width of the blade <NUM> can be tapered gradually along a length of the blade <NUM> from the maximum width W2 at the inflection region <NUM> to the minimum width W3 at the blunt tip <NUM>, for example.

In certain instances, the width W1 can be any width selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the width W1 can be any width selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the width W1 can be about <NUM> inch, for example.

In certain instances, the width W2 can be any width selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the width W2 can be any width selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the width W2 can be about <NUM> inch, for example.

In certain instances, the width W3 can be any width selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the width W1 can be any width selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the width W3 can be about <NUM> inch, for example. Other values for the widths W1, W2, and/or W3 are contemplated by the present disclosure.

In certain instances, the length L4 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the length L4 can be any length selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the length L3 can be about <NUM> inch, for example. Other values for the length L4 are contemplated by the present disclosure.

Referring primarily to <FIG>, <FIG>, Cartesian coordinate system is defined such that in <FIG>, the X-axis of the Cartesian coordinate system extends away from the page. And in <FIG>, the Z-axis extends away from the page. In the embodiment illustrated in <FIG>, <FIG>, the X- and Z- axes of the Cartesian coordinate system define an XZ plane that transects the tissue-treating surface <NUM>. As illustrated in <NUM>, the XZ plane transects the tissue-treating surface <NUM> at an angle of <NUM>°, for example. In addition, the XZ plane extends along a centerline <NUM> (<FIG>) that extends through the base <NUM>.

The curved portion <NUM> of the blade <NUM> is designed to fit and be passed through a tubular channel such as, for example, a trocar (not shown) during use of the blade <NUM> in a laparoscopic procedure, for example. Accordingly, to maximize the curvature of the blade <NUM> while staying within a size limit dictated by the diameter of the trocar, for example, the curved portion <NUM> of the blade <NUM> follows a unique trajectory with respect to the XZ plane.

Essentially, the curved portion <NUM> comprises a substantially arcuate profile that begins, or substantially begins, on a first side of the XZ plane, as illustrated in <FIG>. The profile of the curved portion <NUM> then crosses the XZ plane to a second side of the XZ plane opposite the first side. Then, the profile of the curved portion <NUM> turns at an inflection region <NUM>, and returns once again to the first side such that the blunt tip <NUM> is completely positioned on the first side of the XZ plane, as illustrated in <FIG>. Accordingly, the profile of the curved portion <NUM> extends on both sides the XZ plane.

The cross-sectional area of the curved portion <NUM>, as illustrated in <FIG>, includes a proximal region <NUM>, an inflection region <NUM>, and a distal region <NUM>. The proximal and distal regions <NUM>, <NUM> can reside on the first side of the XZ plane, while the inflection region <NUM> resides mainly on the second side of the XZ plane.

In one example, more the <NUM>% of the width W2 at the inflection region <NUM> resides on the second side of the XZ plane. In another example, more the <NUM>% of the width W2 at the inflection region <NUM> resides on the second side of the XZ plane. In another example, more the <NUM>% of the width W2 at the inflection region <NUM> resides on the second side of the XZ plane. In another example, more the <NUM>% of the width W2 at the inflection region <NUM> resides on the second side of the XZ plane. In another example, more the <NUM>% of the width W2 at the inflection region <NUM> resides on the second side of the XZ plane.

In certain instances, the curved portion <NUM> has a tilted or uneven curved profile. As illustrated in <FIG>, the proximal and distal regions <NUM>, <NUM> can reside at different perpendicular distances from the XZ plane. For example, the distal region <NUM> may be positioned further away from the XZ plane than the proximal region <NUM>. Such a design is advantageous because it permits that blunt tip <NUM> of the blade <NUM> to extend or protrude outward, or to the side, beyond the base <NUM>, which enhances the visibility of the blunt tip <NUM> from a position proximal to the base <NUM>, as illustrated in <FIG>.

In the embodiment illustrated in <FIG>, the distal region <NUM> intersects the centerline <NUM> at an angle α3 selected from a range of about <NUM>° to about <NUM>°, for example. In one embodiment, angle α3 can be any angle selected from a range of about <NUM>° to about <NUM>°, for example. In one embodiment, the angle α3 can be about <NUM>°, for example. Other values for the angle α3 are contemplated by the present disclosure.

In one example, the perpendicular distance between the proximal region <NUM> and the XZ plane is about <NUM> inch, while the perpendicular distance between the distal region <NUM> and the XZ plane is about <NUM> inch. In this example, as illustrated in <FIG>, the perpendicular distance between the inflection region <NUM> and the XZ plane is about <NUM> inch.

In certain instances, the perpendicular distance between the proximal region <NUM> and the XZ plane is any distance selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the perpendicular distance between the proximal region <NUM> and the XZ plane is any distance selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the perpendicular distance between the distal region <NUM> and the XZ plane is any distance selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the perpendicular distance between the distal region <NUM> and the XZ plane is any distance selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the perpendicular distance between the infliction region <NUM> and the XZ plane is any distance selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the perpendicular distance between the infliction region <NUM> and the XZ plane is any distance selected from a range of about <NUM> inch to about <NUM> inch. Other values for the distances described above are contemplated by the present disclosure.

In certain instances, the ratio of the perpendicular distance between the proximal region <NUM> and the XZ plane to the perpendicular distance between the distal region <NUM> and the XZ plane is any value selected from a range of about one quarter to about three quarters. In certain instances, the ratio of the perpendicular distance between the proximal region <NUM> and the XZ plane to the perpendicular distance between the distal region <NUM> and the XZ plane is any value selected from a range of about one third to about two thirds.

Like the width of the curved portion <NUM>, the height of the curved portion <NUM> can be tapered as well. As illustrated in <FIG>, the height of the curved portion <NUM> can be tapered gradually along a length of the blade <NUM> from a maximum height H1 at a the proximal end of the curved portion <NUM> to a minimum height H2 at the blunt tip <NUM>, for example.

In certain instances, the height H1 can be any height selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the height H1 can be any height selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the height H1 can be about <NUM> inch, for example.

In certain instances, the height H2 can be any height selected from a range of about <NUM> inch to about <NUM> inch. In certain instances, the height H2 can be any height selected from a range of about <NUM> inch to about <NUM> inch. In one instance, the height H2 can be about <NUM> inch, for example.

In certain instances, the ratio of the height H2 to the height H1 is selected from a range of values between about <NUM> to about <NUM>. In certain instances, the ratio of the height H2 to the height H1 is selected from a range of values between about <NUM> to about <NUM>. In one example, the ratio of the height H2 to the height H1 is about <NUM>.

Referring primarily to <FIG>, <FIG>, the base <NUM> may comprise a generally cylindrical shape with a flat top region <NUM> that extends proximally from the tissue-treating surface <NUM>. As illustrated in <FIG>, the centerline <NUM> may extend through a central axis of the cylindrical base <NUM>. The curved portion <NUM> of the blade <NUM> crosses the centerline <NUM> causing the blunt tip <NUM> to extend, or protrude, laterally beyond the base <NUM> to enhance the visibility of the blunt tip <NUM> from a position proximal to the base <NUM>, as illustrated in <FIG>.

The blade <NUM> may include one or more acoustic balancing features. The acoustic balancing features are primarily sections of the blade <NUM> that are modified to acoustically balance the blade <NUM>. In certain instances, the acoustically balancing features can be sections of the blade <NUM> that are removed or shaved to acoustically balance the blade <NUM>.

Referring primarily to <FIG>, <FIG>, a first acoustic balancing feature <NUM> is provided on a first side of the blade <NUM>. The first acoustic balancing feature <NUM> encompasses a region that extends distally from a distal end of the base <NUM>. In the embodiment illustrated in <FIG>, the first acoustic balancing feature <NUM> has a first contour line <NUM> that intersects the tissue-treating surface <NUM>, the first side wall <NUM>, and first intermediate wall <NUM>.

As illustrated in <FIG>, the first contour line <NUM> of the acoustic balancing feature <NUM> interrupts the proximal extension of the of the first side wall <NUM> and the first intermediate wall <NUM> toward the base <NUM>. A second contour line <NUM> of the first acoustic balancing feature <NUM> intersects the first tissue-cutting surface <NUM>, as illustrated in <FIG>. The contour lines <NUM> and <NUM> may intersect at a distal tip <NUM>, as illustrated in <FIG>.

As best illustrated in <FIG>, the first contour line <NUM> of the first acoustic balancing feature <NUM> may interrupt the proximal extension of the first contour line <NUM> of the tissue-treating surface <NUM> thereby reducing or shaving the width of the tissue-treating surface <NUM> to create a narrowed proximal region <NUM>. The interruptions caused by the first acoustic balancing feature <NUM> modify the shape of the blade <NUM> to improve its acoustic balance which is crucial to the function of the blade <NUM>.

Referring primarily to <FIG>, the blade <NUM> may include a second acoustic balancing feature <NUM>. As illustrated in <FIG>, the second acoustic balancing feature <NUM> may intersect the second tissue-cutting surface <NUM> at a contour line <NUM>. In the embodiment illustrated in <FIG>, the second acoustic balancing feature <NUM> comprises a generally curved shape that terminates at a peak <NUM>.

Referring again to <FIG>, a third acoustic balancing feature <NUM> may intersect the first tissue-cutting surface <NUM> at a contour line <NUM>. Like the second acoustic balancing feature <NUM>, the third acoustic balancing feature <NUM> may comprises a generally curved shape that terminates at a peak <NUM>. In the embodiment illustrated in <FIG>, the second acoustic balancing feature <NUM> comprises a greater radius of curvature that third acoustic balancing feature <NUM>. In other embodiments, the third acoustic balancing feature <NUM> comprises a greater radius of curvature than the second acoustic balancing feature <NUM>. In other embodiment the second acoustic balancing feature <NUM> and the third acoustic balancing feature <NUM> comprise the same, or at least substantially the same, radius of curvature.

Referring primarily to <FIG>, a fourth acoustic balancing feature <NUM> extends further proximally from the second acoustic balancing feature <NUM> and the third acoustic balancing feature <NUM>. The fourth acoustic balancing feature <NUM> includes a first contour line <NUM> which comprises a curved shape and generally extends from the peak <NUM> to the peak70, as best illustrated in <FIG>. Additionally, the fourth acoustic balancing feature <NUM> includes a second contour line <NUM> that intersects the second acoustic balancing feature <NUM>, and a third contour line <NUM> that intersects the third acoustic balancing feature <NUM>.

In the embodiment illustrated in <FIG>, the contour lines <NUM>, <NUM> intersect each other at a proximal end <NUM> of the cutting edge <NUM>. Furthermore, the contour lines <NUM> and <NUM> may also intersect each other at the proximal end of the cutting edge <NUM>, as illustrated in <FIG>.

In one embodiment, the ultrasonic energy transmitted to tissue pressed against the cutting edge <NUM> can be employed to sever the tissue. In such embodiment, the blade <NUM> can be manipulated by an operator to position the cutting edge <NUM> against the tissue. Ultrasonic energy can then be transmitted to the tissue through the cutting edge <NUM> thereby causing the tissue to be severed or cut.

As best illustrated in <FIG>, the first tissue cutting surface <NUM> extends distally from the contour line <NUM> which defines a distal perimeter of the third acoustic balancing feature <NUM>. In a similar manner, the second tissue-cutting surface <NUM> extends distally from the contour line <NUM> which defines a distal perimeter of the second acoustic balancing feature <NUM>. In the embodiment illustrated in <FIG>, the cutting surfaces <NUM>, <NUM> extend distally in generally curved paths along side each other defining a generally curved contour line therebetween the produces the cutting edge <NUM>.

The reader will appreciate that the angle between the cutting surfaces <NUM>, <NUM> can, at least in part, determine the sharpness of the cutting edge <NUM>. In certain instances, the angle between the cutting surfaces <NUM>, <NUM> can be the same, or substantially the same, along the length of the cutting edge <NUM>. Alternatively, the angle between the cutting surfaces <NUM>, <NUM> can be varied along the length, or at least a portion of the length, of the cutting edge <NUM>. Accordingly, the sharpness of the cutting edge <NUM> can be varied along the length, or at least a portion of the length, of the cutting edge <NUM>. In one embodiment, a proximal portion of the cutting edge <NUM> can be sharper than a distal portion of the cutting edge <NUM>. Alternatively, a distal portion of the cutting edge <NUM> can be sharper than a proximal portion of the cutting edge <NUM>.

The angle(s) between the cutting surfaces <NUM>, <NUM> can be selected from a range of about <NUM>° to about <NUM>°. In one embodiment, the angle(s) between the cutting surfaces <NUM>, <NUM> can be selected from a range of about <NUM>° to about <NUM>°. In one embodiment, the angle(s) between the cutting surfaces <NUM>, <NUM> can be selected from a range of about <NUM>° to about <NUM>°. In one embodiment, the angle(s) between the cutting surfaces <NUM>, <NUM> can be selected from a range of about <NUM>° to about <NUM>°. Other values for the angle(s) between the cutting surfaces <NUM>, <NUM> can be contemplated by the present disclosure.

In one embodiment, referring primarily to <FIG>, an angle α2 between the cutting surfaces <NUM>, <NUM> at a distal end portion of the first acoustic balancing feature <NUM> may be selected from a range of about <NUM>° to about <NUM>°. In one instance, the angle α2 can be about <NUM>°, for example.

Referring primarily to <FIG>, a front view of one embodiment of the blade <NUM> is illustrated. In the embodiment illustrated in <FIG>, the blade <NUM> is tapered such that the proximal end <NUM> of the cutting edge <NUM> is further away from a plane defined by the tissue-treating surface <NUM> than the distal end <NUM> of the cutting edge <NUM>. Said another way, the proximal end <NUM> of the cutting edge <NUM> is vertically offset from the distal end <NUM> of the cutting edge <NUM>.

Furthermore, the proximal end <NUM> and the distal end <NUM> reside on opposite sides of the XZ plane. Said another way, the proximal end <NUM> of the cutting edge <NUM> can be horizontally offset from the distal end <NUM> of the cutting edge <NUM>. <FIG> illustrate a longitudinal cross-section of the blade <NUM> taken along the XZ plane. <FIG> depicts the first side of the XZ plane which includes the distal end <NUM> of the cutting edge <NUM>. <FIG> depicts the second side of the XZ plane which includes the proximal end <NUM> of the cutting edge <NUM>.

In various instances, the ultrasonic blade <NUM> can be incorporated into an ultrasonic surgical instrument. For example, the ultrasonic blade <NUM> can be incorporated into an ultrasonic surgical instrument that includes a clamp member that may be controlled by an operator of the ultrasonic surgical instrument to capture tissue between the clamp member the ultrasonic blade <NUM> to treat the captured tissue. Examples of such ultrasonic surgical instruments and their mechanisms of operation are depicted in <CIT>, and <CIT>.

<FIG> illustrates a right side view of one embodiment of an ultrasonic surgical instrument <NUM> suitable for use with the ultrasonic blade <NUM>. In the illustrated embodiment, the ultrasonic surgical instrument <NUM> may be employed in various surgical procedures including endoscopic or traditional open surgical procedures. In one example embodiment, the ultrasonic surgical instrument <NUM> comprises a handle assembly <NUM> extending proximally from an elongate shaft assembly <NUM>, and an end effector assembly <NUM> extending distally from the elongate shaft assembly <NUM>. An ultrasonic transmission waveguide <NUM> (<FIG>) may extend, or at least partially extend, through the elongate shaft assembly <NUM>. A distal end portion of the ultrasonic transmission waveguide <NUM> can be acoustically coupled (e.g., directly or indirectly mechanically coupled) to the blade10. A proximal end portion of the ultrasonic transmission waveguide <NUM> can be received within the handle assembly <NUM> for acoustic coupling to an ultrasonic transducer <NUM>.

The handle assembly <NUM> comprises a trigger <NUM>, a handle <NUM>, a distal rotation assembly <NUM>, and a switch assembly <NUM>. The elongated shaft assembly <NUM> comprises an end effector assembly <NUM> and actuating elements to actuate the end effector assembly <NUM>. The handle assembly <NUM> is adapted to receive the ultrasonic transducer <NUM> at the proximal end. The ultrasonic transducer <NUM> can be mechanically engaged to the elongated shaft assembly <NUM> and portions of the end effector assembly <NUM>. The ultrasonic transducer <NUM> can be electrically coupled to a generator <NUM> via a cable <NUM>. In certain instances, the generator <NUM> can be integrated with the handle assembly <NUM>, for example. A suitable generator is available as model number GEN11, from Ethicon Endo-Surgery, Inc. , Cincinnati, Ohio.

The ultrasonic transducer <NUM> may convert the electrical signal from the ultrasonic signal generator <NUM> into mechanical energy that results in primarily a standing acoustic wave of longitudinal vibratory motion of the ultrasonic transducer <NUM> and the blade <NUM> portion of the end effector assembly <NUM> at ultrasonic frequencies.

In various instances, the energy generated in the blade <NUM> can be employed to cut and/or coagulate tissue. In one embodiment, vibrating at high frequencies (e.g., <NUM>,<NUM> times per second), the ultrasonic blade <NUM> may denature protein in the tissue to form a sticky coagulum.

Although the majority of the drawings depict a multiple end effector assembly <NUM> for use in connection with laparoscopic surgical procedures, the ultrasonic surgical instrument <NUM> may be employed in more traditional open surgical procedures and in other embodiments, may be configured for use in endoscopic procedures.

In various embodiments, the generator <NUM> comprises several functional elements, such as modules and/or blocks. Different functional elements or modules may be configured for driving different kinds of surgical devices. For example, an ultrasonic generator module <NUM> may drive an ultrasonic device, such as the ultrasonic surgical instrument <NUM>. In some example embodiments, the generator <NUM> also comprises an electrosurgery/RF generator module <NUM> for driving an electrosurgical device. In the example embodiment illustrated in <FIG>, the generator <NUM> includes a control system <NUM>. When activated by the control system <NUM>, the generator <NUM> may provide energy to drive the blade <NUM> of the surgical instrument <NUM>.

Referring to <FIG>, the elongated shaft assembly <NUM> comprises a proximal end portion <NUM> adapted to mechanically engage the handle assembly <NUM> and the distal rotation assembly <NUM>, and a distal end portion <NUM> adapted to mechanically engage the end effector assembly <NUM>. The elongated shaft assembly <NUM> comprises an outer tubular sheath <NUM> and a reciprocating tubular actuating member <NUM> located within the outer tubular sheath <NUM>, as illustrated in <FIG>.

The proximal end of the tubular reciprocating tubular actuating member <NUM> is mechanically engaged to the trigger <NUM> of the handle assembly <NUM> to move in either direction 60A or 60B in response to the actuation and/or release of the trigger <NUM>. The pivotably moveable trigger <NUM> may generate reciprocating motion along the longitudinal axis "T. " Such motion may be used, for example, to actuate an end effector <NUM> of the end effector assembly <NUM>.

The distal end of the tubular reciprocating tubular actuating member <NUM> is mechanically engaged to the end effector <NUM> (<FIG>). In the illustrated embodiment, the distal end of the tubular reciprocating tubular actuating member <NUM> is mechanically engaged to a clamp member <NUM>, which is pivotable about a pivot point <NUM>, to open and close the clamp member <NUM> in response to the actuation and/or release of the trigger <NUM>. For example, in the illustrated embodiment, the clamp member <NUM> is movable in direction 162A from an open position to a closed position about a pivot point <NUM> when the trigger <NUM> is squeezed toward the handle <NUM>. The clamp member <NUM> is movable in direction 162B from a closed position to an open position about the pivot point <NUM> when the trigger <NUM> is released.

In the closed position, tissue such as, for example, a blood vessel may be captured between the tissue-treating surface <NUM> of the blade <NUM> and a tissue grasping feature <NUM> of the clamp member <NUM> of the end effector <NUM>. Pressure exerted on the captured tissue by the tissue-treating surface <NUM> may collapse the blood vessel and allow the coagulum resulting from application of the ultrasonic energy to form a hemostatic seal. A surgeon can control the cutting speed and coagulation by the force applied to the tissue by the end effector <NUM>, the time over which the force is applied and the selected excursion level of the end effector <NUM>.

Although the various embodiments of the devices have been described herein in connection with certain disclosed embodiments, many modifications and variations to those embodiments may be implemented. Also, where materials are disclosed for certain components, other materials may be used. Furthermore, according to various embodiments, a single component may be replaced by multiple components, and multiple components may be replaced by a single component, to perform a given function or functions.

The devices disclosed herein can be designed to be disposed of after a single use, or they can be designed to be used multiple times. In either case, however, the device can be reconditioned for reuse after at least one use. Reconditioning can include any combination of the steps of disassembly of the device, followed by cleaning or replacement of particular pieces, and subsequent reassembly. In particular, the device can be disassembled, and any number of the particular pieces or parts of the device can be selectively replaced or removed in any combination. Upon cleaning and/or replacement of particular parts, the device can be reassembled for subsequent use either at a reconditioning facility, or by a surgical team immediately prior to a surgical procedure. Those skilled in the art will appreciate that reconditioning of a device can utilize a variety of techniques for disassembly, cleaning/replacement, and reassembly.

By way of example only, aspects described herein may be processed before surgery. First, a new or used instrument may be obtained and when necessary cleaned. The instrument may then be sterilized. In one sterilization technique, the instrument is placed in a closed and sealed container, such as a plastic or TYVEK bag. The container and instrument may then be placed in a field of radiation that can penetrate the container, such as gamma radiation, x-rays, or high-energy electrons. The radiation may kill bacteria on the instrument and in the container. The sterilized instrument may then be stored in the sterile container. The sealed container may keep the instrument sterile until it is opened in a medical facility. A device also may be sterilized using any other technique known in the art, including but not limited to beta or gamma radiation, ethylene oxide, plasma peroxide, or steam.

Claim 1:
A surgical instrument, comprising:
an ultrasonic transducer (<NUM>);
an ultrasonic transmission waveguide (<NUM>) extending from the ultrasonic transducer; and
an ultrasonic blade (<NUM>) acoustically coupled to the ultrasonic transmission waveguide, wherein the ultrasonic blade comprises:
a base (<NUM>); and
a curved body extending distally from the base, wherein the curved body comprises:
a tissue-treating surface (<NUM>) extending on a first side of the curved body; and
a curved cutting edge (<NUM>) extending on a second side of the curved body opposite the first side, wherein the curved cutting edge comprises:
a proximal end (<NUM>); and
a distal end (<NUM>), wherein the proximal end is offset from the distal end in a first direction that results from the blade (<NUM>) being tapered such that the proximal end (<NUM>) of the cutting edge (<NUM>) is further away from a plane defined by the tissue-treating surface (<NUM>) than the distal end (<NUM>) of the cutting edge (<NUM>), wherein the proximal end is offset from the distal end in a second direction, and wherein the first direction is perpendicular to the second direction such that the proximal end and the distal end reside on opposites sides of an XZ plane, wherein the XZ plane transects the tissue-treating surface (<NUM>) at an angle of <NUM>° and extends along a centerline that extends through the base (<NUM>).