Patent Description:
A subcutaneous (SC) injection is a method of administering medication under the skin, commonly into fatty tissue between the skin and the muscle. The current trend toward subcutaneous injection for biologicals using auto-injectors such as, for example, reusable and disposable pens, auto-injectors, and patch injectors that adhere to the surface of the skin gives users the freedom to self-inject at home.

In many cases, reformulated drugs can be more concentrated, at times more viscous and the desired injection volume greater than <NUM>. For high viscosity products, delivery in under <NUM> seconds can lead to painful injections, which may result in users failing to follow their treatment regimen. It may be difficult at times for a user to keep a Pen or any other upright injector stationary and at a correct angle of injection during injections for periods of over <NUM> seconds or several minutes. Patch auto or self-injectors for self-administered SC injections are therefore becoming more common.

Additional background art includes <CIT>, <CIT>, international patent application no. <CIT> and <CIT>.

According to an aspect of some embodiments of the present invention there is provided an add-on for a self-injector according to appended independent claim <NUM>. Other advantageous features are defined in the dependent claims related to the add-on.

The present invention also relates to a self-injector coupling system according to independent claim <NUM>. Other advantageous features are defined in the dependent claims related to the system.

The present invention, in some embodiments thereof, relates to self-injectors and, more particularly, but not exclusively, to a patch self-injector.

An aspect of some embodiments of the invention relates to a self-injector sized and fitted to couple fluid reservoirs of variable sizes and tip types to the injector. In some embodiments, the self-injector comprises at least a needle-bearing portion and at least one fastener attachable to the injector and at least to a barrel of a fluid reservoir. In some embodiments, the needle bearing portion comprises a needle protective cap. In some embodiments, the self-injector and the fluid reservoir are provided sterile. For example, the reservoir, needle bearing portion and cap may be assembled and sterilized together. In some embodiments, the self-injector and the fluid reservoir are provided unsterile. In some embodiments, the self-injector and the fluid reservoir are sterilized prior to filling with an injectable. In some embodiments, post sterilization the sterile fluid reservoir is filled with an injectable and provided sterilely sealed and capped with a protective cap. In some embodiments, the distance between the needle-bearing portion and the fastener is adjustable. In some embodiments, the internal radius of the fastener is adjustable. In some embodiments, the injector comprises a patch type self-injector. In some embodiments, the injector comprises a bent needle. In some embodiments, the needle is bent at a <NUM> degree angle. In some embodiments, at least one portion of the injector comprises at least a bore sized and fitted to accommodate a fluid reservoir tip. In some embodiments, at least a portion of the needle extends through the bore. In some embodiments, the needle-bearing portion is fixed in place. In some embodiments the fluid reservoir comprises a syringe. In some embodiments, the fluid reservoir comprises a vial. In some embodiments the fluid reservoir comprises a prefilled cartridge.

In some embodiments, the self-injector is sized and fitted to accommodate refillable fluid reservoirs. In some embodiments, a self-injector is sized and fitted to accommodate prefilled fluid reservoirs. In some embodiments the prefilled fluid reservoir tips are sealed for sterility. In some embodiments, the injector comprises one or more adaptors that couple the needle to one or more fluid reservoir tip types. In some embodiments, the adaptor is sized and fitted for coupling the needle to a slip or push-on type fluid reservoir tip. In some embodiments, the adaptor is sized and fitted for coupling the needle to a Luer-lock type fluid reservoir tip. In some embodiments, the adaptor is sized and fitted for coupling the needle to a catheter type fluid reservoir tip. In some embodiments, the adaptor is sized and fitted for coupling the needle to a fluid reservoir with a centered tip. In some embodiments, the adaptor is sized and fitted for coupling the needle to a fluid reservoir with an eccentric tip.

An aspect of some embodiments of the invention relates to a self-injector comprising a modular fluid reservoir-injector coupling system. In some embodiments, the modular system comprises a support plate sized and fitted to accommodate variable types and sizes of fluid reservoirs. In some embodiments, the injector comprises a bent needle. In some embodiments, the needle is bent at a <NUM> degree angle. In some embodiments, the support plater comprises one or more notches configured to accommodate fasteners that fix the fluid reservoir to the injector. In some embodiments, at least a portion of one or more fasteners is fixedly coupled to a self-injector support plate. In some embodiments, at least a portion of one or more fasteners is releasably coupled to the self-injector support plate. In some embodiments, one or more fasteners comprises at least an aperture sized and fitted to accommodate a fluid reservoir tip. In some embodiments, at least one fastener comprises a bent needle. In some embodiments, at least one fastener comprises at least a bore sized and fitted to accommodate a fluid reservoir tip. In some embodiments, at least a portion of the needle extends through the aperture or bore.

In some embodiments, at least one fastener comprises a latch and a hinge. In some embodiments, at least one fastener comprises one or more latches. In some embodiments, at least one fastener is sized and fitted to fasten a barrel of a fluid reservoir. In some embodiments, at least one fastener is sized and fitted to fasten a finger flange of a fluid reservoir. In some embodiments, at least one fastener comprises at least one fitting sized and fitted for a specific fluid reservoir barrel diameter. In some embodiments, at least one fastener is fitted with an at least partially resilient pad. In some embodiments, at least a portion of a fluid reservoir is urged against the resilient pad when locked into place in the injector. In some embodiments, the resilient pad stops leaks from the fluid reservoir tip-needle coupling. In some embodiments, the resilient pad comprises an aperture for a tip of a needle.

An aspect of some embodiments of the invention relates to a self-injector comprising a bent needle and having a Luer-lock coupling sized and fitted to receive a fluid reservoir with a male Luer-lock type tip. In some embodiments, the Luer-lock coupling comprises a cylinder coupled at one end to the injector and comprising a tabbed rim configured to screw into a male Leur-lock fluid reservoir tip. In some embodiments, at least a portion of the bent needle is disposed in a lumen of the cylinder. In some embodiments, at least a portion of the needle is attached to the inside wall of the cylinder. In some embodiments, at least a portion of the cylinder lumen between the portion of the needle and the inside wall comprises a seal. In some embodiments, at least one end of the bent needle extends beyond the cylinder tabbed rim. In some embodiments, the end of the bent needle extending beyond the cylinder tabbed rim comprises a protective sheath. In some embodiments, the protective sheath maintains sterility of the needle end. In some embodiments, the protective sheath maintains sterility of the portion of the needle inside the cylinder lumen up to and including the end of the needle extending beyond the tabbed rim. In some embodiments, upon coupling, the rim of the male luer lock urges the protective sheath against the tip of the needle. In some embodiments, the needle tip ruptures the protective sheath urged against the needle tip by the male luer lock rim.

An aspect of some embodiments of the invention relates to a self-injector sized and fitted to sterilely accommodate variable types and sizes of fluid reservoirs. In some embodiments, the self-injector comprises a coupling that maintains sterility of a pathway of an injectable during and after coupling to a fluid reservoir containing the injectable. In some embodiments, the injector coupling comprises an end of a needle at least partially isolated by at least one protective sheath. In some embodiments, during coupling a tip of a coupled fluid reservoir urges at least one sheath against the needle end rupturing the protective sheath. In some embodiments, a tip of a coupled fluid reservoir comprises a sealing membrane over an opening in the tip. In some embodiments, during coupling the injector needle is urged against the membrane and penetrates the fluid reservoir tip.

An aspect of some embodiments of the invention relates to a self-injector kit comprising a support plate and a plurality of fasteners and fittings sized and fitted to attach to the support plate. In some embodiments, the plurality of fasteners and fittings sized and fitted to sterilely accommodate variable types and sizes of fluid reservoirs. In some embodiments, the plurality of fasteners comprises quick attachment type coupling. In some embodiments, the plurality of fasteners comprises at least one one-click type coupling. In some embodiments, various fasteners can be coupled to the support place at various desired locations. In some embodiments, at least one fastener comprises a bent needle. In some embodiments, one or more fasteners are configured to accommodate at least one fitting. In some embodiments, one or more fasteners and/or fittings comprise one or more apertures at various internal diameters to fit at least one barrel and/or finger flange of at least one fluid reservoir.

An aspect of some embodiments of the invention relates to a method of loading variable types and sizes of fluid reservoirs a self-injector. In some embodiments, the method comprises one or more fasteners sized and fitted for a barrel and finger flange of a selected fluid reservoir. In some embodiments, the method comprises optionally, selecting at least one fitting sized and fitted for a barrel and finger flange of a selected fluid reservoir. In some embodiments, the method further comprises optionally sliding or coupling one or more fittings onto the barrel or finger flange of the fluid reservoir. In some embodiments, the method further comprises sliding or coupling one or more fasteners onto the barrel or finger flange of the fluid reservoir. In some embodiments, the method further comprises inserting a tip of a fluid reservoir into an aperture in a needle portion of the injector. In some embodiments, the method further comprises optionally inserting a tip of a fluid reservoir into an aperture in a needle-bearing fastener. In some embodiments, the method further comprises coupling the fasteners to a support plate. In some embodiments, the method further comprises connecting the fluid reservoir to a injector fluid reservoir plunger driving system.

Reference is now made to <FIG>, which is a side view simplified illustration of a patch type self-injector as described in US Provisional Patent Application <CIT> and is hereby incorporated in its entirety. Self-injector <NUM> comprises a bent needle <NUM>, e.g., bent at a <NUM> degree angle coupled to a cartridge <NUM>. Cartridge <NUM> may be pre-filled with an injectable. Cartridge <NUM> may be mounted on a support plate <NUM> and include a plunger <NUM> driven by electric motor driving gear <NUM>. Following an injection procedure, cartridge <NUM> may be disposed of and replaced by a new pre-filled cartridge.

The injector powertrain and plunger driving systems are explained in detail in the above referenced US Provisional Patent Application <CIT> and will therefore not be repeated herein.

Reference is now made to <FIG> and 2C, collectively referred to as <FIG>, which are side view simplified illustrations of optional exemplary embodiments of a modular patch type self-injector. As shown in <FIG>, a self-injector <NUM> may be sized and fitted to accommodate variable types and sizes of fluid reservoirs. As in the example of <FIG>, in some embodiments, auto-injector <NUM> comprises a bent needle <NUM>, e.g., bent at a <NUM> degree angle. As explained in greater detail elsewhere in the disclosure, in some embodiments, self-injector <NUM> comprises a support plate <NUM> and at least a needle <NUM>-bearing portion <NUM>. In some embodiments, needle-bearing portion <NUM> comprises at least a bore <NUM> sized and fitted to accommodate a fluid reservoir <NUM>/<NUM> tip <NUM>. In some embodiments, bore <NUM> comprises an aperture <NUM> leading to the bent portion <NUM> of needle <NUM>. In some embodiments, at least a portion of needle <NUM> sealingly extends through aperture <NUM> and into bore <NUM>. In some embodiments, needle-bearing portion <NUM> is fixed on support plate <NUM>.

In some embodiments, shown in <FIG>, bore <NUM> is disposed eccentrically within needle-bearing portion <NUM> to accommodate an eccentric tip fluid reservoir. In some embodiments, shown in <FIG>, bore <NUM> is disposed centrally within needle-bearing portion <NUM> to accommodate a regular (central) tip fluid reservoir.

Commonly used fluid reservoir tips include slip or push on tips and Luer lock type tips. Plastic fluid reservoirs comprise plastic tips of both types whereas glass fluid reservoir tips are commonly made of metal. Some glass fluid reservoirs comprise glass slip-on type tips. The commonly used fluid reservoir-needle coupling practice attempts to maintain a sterile injectable passageway however this may be challenging at times. The common practice is to store both fluid reservoirs and needles each in a sterile pouch to limit their exposure time to the environment from the moment of removal from the pouch until the moment of injection. This practice is not practical when it comes to self-injectors and especially patch-type self-injectors.

Reference is now made to <FIG>, collectively referred to as <FIG>, which are cross-section section and perspective view simplified illustrations of exemplary embodiments of injector- fluid reservoir couplings. The exemplary embodiments of <FIG> depict one or more adaptors that couple needle <NUM> to one or more various fluid reservoir tip types. For example, <FIG>, illustrates needle-bearing portion <NUM> comprising an adaptor <NUM> sized and fitted for coupling needle <NUM> to a slip or push-on type fluid reservoir tip <NUM>. A centrally disposed bore <NUM> opens on one side to an opening <NUM> facing a fluid reservoir to receive a fluid reservoir tip and ends on the opposite side at an aperture <NUM> on the opposite side sized to sealingly accommodate at least a portion of needle <NUM>. Optionally, in some embodiments, bore <NUM> comprises cone geometry. In some embodiments, bore <NUM> comprises cylinder geometry. Optionally and as also shown in <FIG>, in some embodiments, needle-bearing portion <NUM> may further comprise a resilient fitting <NUM> attached adhesively or by any other suitable method over opening <NUM>. In some embodiments, fitting <NUM> may comprise an aperture <NUM> sized to accommodate a correspondingly sized slide-on type fluid reservoir tip. In some embodiments, when at least a portion of a fluid reservoir <NUM> is urged against the resilient fitting when locked into place in the injector, resilient fitting <NUM> stops possible leaks from the fluid reservoir tip-needle coupling.

In some embodiments, fitting <NUM> may be made of a resilient type suitable material, e.g., Silicone to act as a seal and seal opening <NUM> when a fluid reservoir barrel <NUM> is urged against needle-bearing portion <NUM> as shown in <FIG>.

As illustrated in <FIG>, in some embodiments, end of needle <NUM> may at least partially extend into bore <NUM> and into a lumen of a fluid reservoir tip <NUM> when a fluid reservoir <NUM> is coupled to the self-injector. As shown in <FIG>, tips of a fluid reservoir <NUM> may be sealed for sterility. For example, an opening of a fluid reservoir tip <NUM> (<FIG>) may be sealed by a membrane <NUM>, or, alternatively, a fluid reservoir tip <NUM> (<FIG>) may be covered by a protective sheath <NUM>. In some embodiments, when coupled to a fluid reservoir <NUM>, end <NUM> of needle <NUM> extending into bore <NUM> is configured to break most types of fluid reservoir tip seals protecting sterility of the injectable inside fluid reservoir <NUM>. Ion some embodiments, and shown in <FIG>, fitting <NUM> aperture <NUM> may be sealed by a membranous seal <NUM>. In some embodiments, when self-injector <NUM> is coupled to a fluid reservoir <NUM>, a tip <NUM>/<NUM> of fluid reservoir <NUM> may break membranous seal <NUM>.

Referring now to <FIG> which illustrate self-injector <NUM> comprising bent needle <NUM> and Luer-lock coupling <NUM> sized and fitted to receive a fluid reservoir <NUM> with a male Luer-lock type tip <NUM>. In some embodiments, Luer-lock coupling <NUM> comprises a cylinder sealingly coupled at one end to needle <NUM> and injector <NUM> and comprising a tabbed rim <NUM> on the opposite end that opens toward bore <NUM> opening <NUM>. In some embodiments, tabbed rim <NUM> is configured to thread into a sleeve <NUM> on a male Leur-lock fluid reservoir tip <NUM>. <FIG> shows Luer-lock coupling <NUM> and Luer-lock type fluid reservoir <NUM> tip <NUM> in a fully mated configuration.

The exemplary embodiment depicted in <FIG> illustrates a Luer lock coupling system similar to that described elsewhere in the disclosure. Optionally, in some embodiments and as shown in <FIG>, end <NUM> of bent needle <NUM> extending beyond Luer-lock coupling <NUM> tabbed rim <NUM> comprises a protective sheath <NUM> configured to maintain sterility needle end <NUM>. In some embodiments, protective sheath <NUM> is made of a pliable membranous material e.g., rubber, polyurethane or any other suitable material. In some embodiments, when mated as shown in <FIG>, a rim <NUM> of male Luer lock fluid reservoir <NUM> tip <NUM> urges protective sheath <NUM> against needle end <NUM>. In some embodiments and as shown in <FIG>, needle end <NUM> breaks protective sheath <NUM> as it enters into the lumen <NUM> of fluid reservoir Luer lock tip <NUM>. <FIG> shows Luer-lock coupling <NUM> and Luer-lock type fluid reservoir <NUM> tip <NUM> in a fully mated configuration. Additionally and optionally, in some embodiments, fluid reservoir male Luer lock tip <NUM> comprises a seal similar to seal <NUM> of fluid reservoir tip <NUM>.

In some embodiments and as shown in <FIG>, self-injector may be comprise a bent needle adaptor <NUM> comprising a fluid reservoir coupling similar to the examples described elsewhere in the disclosure and a second coupling <NUM> at a second end of the adaptor <NUM>. In the example depicted ion <FIG> second coupling <NUM> comprises a Leur lock tip. A cover <NUM> protects second coupling <NUM> from the environment and maintains the sterility of needle adaptor <NUM>. In some embodiments, adapter <NUM> provides the freedom to couple a standard needle <NUM> to self-injector <NUM>. In the exemplary embodiment shown in <FIG>, protective cap <NUM> has been removed and a Leur lock tip needle <NUM> is coupled to needle adaptor <NUM> and fluid reservoir <NUM>.

As shown in <FIG>, an exemplary embodiment of bent needle adaptor <NUM> comprises a vial adaptor <NUM> such as, for example a Medimop Medical Projects Ltd. vial adaptor described in <CIT>. In some embodiments, bent needle adaptor <NUM> comprises a sterile cover <NUM>. In some embodiments, bent needle adaptor <NUM> comprises needle cap <NUM>. Optionally and alternatively and as shown in <FIG>, bent needle adaptor <NUM> may be attached to an empty vial <NUM> to form a single non-sterile self-injector cartridge unit <NUM>. In some embodiments, cartridge unit <NUM> can then be sterilized and filled with an injectable.

An aspect of some embodiments of the invention relates to a self-injector comprising a modular fluid reservoir-injector coupling system. Self-injectors and specifically patch self-injectors are designed to avoid movement of the injection needle in the tissue during the injection process and thus to minimize pain associated with the injection. This is achieved by various cou0pling methods that fixedly attach the injection needle and/or the fluid reservoir cartridge to the self-injector housing.

Reference is now made to <FIG>, collectively referred to as <FIG>, which are plan and perspective view simplified illustration of exemplary embodiments of a modular fluid reservoir-injector coupling system. In the examples depicted in <FIG>, self-injector <NUM> comprises one or more fasteners <NUM>, sized and fitted to accommodate at least a barrel <NUM> or a finger flange <NUM> of a fluid reservoir <NUM>. In some embodiments and as shown in <FIG>, injector <NUM> comprises one or more fasteners configured to couple variable types and sizes of fluid reservoirs to self-injector <NUM>. As shown in <FIG>, in some embodiments, a fastener <NUM> comprises ring geometry sized and fitted to slide onto a fluid reservoir barrel of a corresponding diameter. In some embodiments, fastener <NUM> further comprises at least one protrusion <NUM> extending from the periphery of fastener <NUM>. In the exemplary embodiment depicted in <FIG> protrusion <NUM> extends tangentially from the ring of fastener <NUM>, however protrusion <NUM> may extend radially or in any other suitable geometric configuration. In In some embodiments, protrusion <NUM> is oriented parallel at least to a surface <NUM> of a support plate <NUM>. In the exemplary embodiment illustrated in <FIG>, at least one protrusion <NUM> is fixedly coupled to the support plate <NUM> by at least one retention member. In the example shown in <FIG>, the attachment member comprises a retention cantilever <NUM>. In some embodiments, retention cantilever <NUM> is elastic and/or comprises at least an elastic coupling to support plate <NUM>. However, the attachment member may comprise any type of suitable attachment mechanism. In some embodiments, retention cantilever <NUM> is configured to releasably couple fastener <NUM> protrusion <NUM> to support plate. <FIG> illustrate an exemplary embodiment in which fastener <NUM> comprises an inverted U geometry. In some embodiments, support plate <NUM> a plurality of notches <NUM> configured to accommodate legs <NUM> of fastener <NUM>. In some embodiments, support plate <NUM> notches <NUM> comprise retention cantilevers <NUM> configured to releasably couple fastener <NUM> to support plate by fitting into one or more corresponding recesses <NUM> in legs <NUM>. Optionally, a plurality of recesses <NUM> supports adjustment of the internal radius of fastener <NUM> by adjusting the depth of insertion of fastener <NUM> one or more legs <NUM> into support plate <NUM>. Thus, a plurality of recesses <NUM> renders fastener <NUM> to be configured to size and fit a variety of fluid reservoir sizes.

As shown in <FIG>, in some embodiments, support plate <NUM> comprises a plurality of attachment points <NUM>/<NUM> distributed in a fashion that allows fasteners <NUM>/<NUM>/<NUM> to be coupled to support plate <NUM> at varying distances from needle portion <NUM> to accommodate fluid reservoirs of varying lengths. In some embodiments, attachment points <NUM>/<NUM> optionally comprise cantilevers <NUM> of the type shown in <FIG>. In some embodiments, attachment points <NUM>/<NUM> optionally comprise notches <NUM> and retention cantilevers <NUM> configured to releasably couple fasteners of the type depicted in <FIG>. In some embodiments, attachment points <NUM>/<NUM> optionally comprise sliding hinges and retention levers in a configuration shown in <FIG> and4F. Additionally and optionally, attachment points <NUM>/<NUM> may comprise any similar suitable attachment mechanism other than the exemplary embodiments described herein.

<FIG> illustrate an exemplary embodiment in which fastener <NUM> comprises a hinged inverted U geometry. In the example in <FIG> one leg <NUM> comprises a sliding hinge <NUM> configured to form a large gap when open to release or receive a fluid reservoir barrel <NUM>. In the closed configuration shown in <FIG>, fastener <NUM> non-hinged leg <NUM> is locked in place by a retention cantilever <NUM>.

In some embodiments, at least one of fasteners <NUM>/<NUM>/<NUM> comprises the same size to fit onto the same support plate <NUM>. In some embodiments and as shown in <FIG>, fasteners <NUM>/<NUM>/<NUM> are fitted with one or more ring geometry fittings <NUM> (<FIG>) at various diameters sized and fitted to a corresponding diameter of a specific fluid reservoir barrel. In some embodiments, fittings <NUM> are configured to slide onto a barrel <NUM> of a fluid reservoir <NUM> and provide sufficient friction when a fastener, e.g. fasteners <NUM>/<NUM> is in the closed configuration to prevent axial slippage and movement of fluid reservoir barrel <NUM> in respect to support plate <NUM>.

<FIG> depict a fastener of the type illustrated in <FIG>, however fittings <NUM> may be fitted in any one of the fasteners described herein or any other similar type of fastener.

In order to secure fixed coupling of a fluid reservoir to a self-injector, fasteners such as fasteners <NUM>/<NUM>/<NUM> need to be adjusted to a length of a fluid reservoir barrel in addition to fixing the fluid reservoir to a surface such as support plate <NUM>. In most cases this can be achieved by sliding the fastener along the fluid reservoir barrel as described elsewhere in the disclosure and/or couple a fastener to a finger flange of the fluid reservoir. The structure of modular support plate <NUM> described elsewhere in the disclosure allows for positioning a fastener at almost any desired location when fitted to a fluid reservoir barrel or finger flange. Reference is now made to <FIG>, which are part sectional side view simplified illustrations of positioning of fasteners coupling a fluid reservoir to a self-injector.

In the exemplary embodiment depicted in <FIG> an empty fluid reservoir <NUM> is coupled to a needle-bearing portion <NUM> to form a single integral self-injector cartridge unit <NUM>. In some embodiments, cartridge unit <NUM> is sterile. In some embodiments, cartridge unit <NUM> is non-sterile. In some embodiments, cartridge unit <NUM> is sterilized, filled with an injectable in a sterile fashion and provided sterile, sealed and ready for use. As shown in the exemplary embodiments illustrated in <FIG>, a sterilely pre-filled cartridge unit <NUM> is coupled to support plate <NUM> by one or more fasteners <NUM> (<FIG>). In some embodiments, cartridge unit <NUM> comprises a plunger <NUM> and is sealed after filling for sterility with a seal <NUM>. In some embodiments, cartridge unit <NUM> is delivered unsterile for sterilization and filling in an envelope e.g., a plastic blister <NUM>. As shown in <FIG>, a fluid reservoir <NUM> e.g., 20cc fluid reservoir, comprising a slip-on tip is mounted onto self-injector <NUM>. In the exemplary embodiment shown in <FIG> tip <NUM> is shown to be inserted into a needle-bearing portion <NUM> in a fashion described elsewhere in the disclosure and will not be repeated. In the exemplary embodiment depicted in <FIG>, needle-bearing portion <NUM> comprises a coupling similar to that of fastener <NUM> and is reversibly coupled to support plate <NUM>. In some embodiments, one or more fasteners <NUM> of a form and function of which is described elsewhere in the disclosure and will not be repeated are positioned along barrel <NUM> at least one of which abutting a finger flange <NUM> coupling a barrel <NUM> of fluid reservoir <NUM> to support plate <NUM>. In some embodiments, when closed, fastener <NUM> provides sufficient friction against barrel <NUM> to prevent axial slippage and movement of barrel <NUM> in respect to support plate <NUM>. Alternatively and optionally, in some embodiments, a fitting of a type described elsewhere in the disclosure may be fitted inside fastener <NUM> and provide sufficient friction against barrel <NUM> to prevent axial slippage and movement of barrel <NUM> in respect to support plate <NUM>.

Alternatively and optionally and as shown in <FIG>, in some embodiments, a fastener <NUM> comprises a radial slot <NUM> along an internal wall <NUM> sized and fitted to accommodate a corresponding sized fluid reservoir finger flange <NUM>. Alternatively and optionally and as shown in <FIG>, in some embodiments, a fastener of the type of fastener <NUM> comprises a fitting <NUM> fitted inside fastener <NUM> comprising a radial slot <NUM> along an internal wall of fitting <NUM> is sized and fitted to accommodate a corresponding sized fluid reservoir finger flange <NUM>. In some embodiments, fitting <NUM> provides sufficient friction against finger flange <NUM> to prevent axial slippage and movement of barrel <NUM> in respect to support plate <NUM>. In <FIG> a fluid reservoir plunger has been replaced with a plunger <NUM> configured to be driven by a self-injector <NUM> plunger driving system (not shown).

Alternatively and optionally, modular fluid reservoir-injector coupling system is shown in <FIG> coupling a small sized fluid reservoir <NUM> e.g., 5cc fluid reservoir to self-injector <NUM>. fluid reservoir <NUM> slip-on tip is shown to be inserted into a needle-bearing portion <NUM> in a fashion described elsewhere in the disclosure and will not be repeated. In some embodiments, one or more fasteners <NUM> of a form and function of which is described elsewhere in the disclosure and will not be repeated are positioned along barrel <NUM> at least one of which abutting a finger flange <NUM> coupling a barrel <NUM> of fluid reservoir <NUM> to support plate <NUM>. In some embodiments, when closed, fastener <NUM> provides sufficient friction against barrel <NUM> to prevent axial slippage and movement of barrel <NUM> in respect to support plate <NUM>. Alternatively and optionally, in some embodiments, a fitting <NUM> of a type described elsewhere in the disclosure may be fitted inside fastener <NUM> and provide sufficient friction against barrel <NUM> to prevent axial slippage and movement of barrel <NUM> in respect to support plate <NUM>.

In the embodiment shown in <FIG>, a fitting <NUM> fitted inside fastener <NUM> is sized and fitted to accommodate corresponding sized fluid reservoir finger flange <NUM>. As shown in <FIG>, needle-bearing portion <NUM> comprises a coupling <NUM> to support plate similar to that of fasteners <NUM> or any type of fastener coupling described elsewhere in the disclosure and is reversibly coupled to support plate <NUM>. As shown in <FIG>, in some embodiments, a finger-flangeless fluid reservoir <NUM> is sealingly attached to needle-bearing portion <NUM>. In the exemplary embodiment depicted in <FIG>, fluid reservoir <NUM> is a pre-filled vial attached to needle-bearing portion <NUM> and fitted with a fastener <NUM> (<FIG>) to be mounted onto support plate <NUM> as explained elsewhere in the disclosure. In some embodiments, needle-bearing portion <NUM> comprises a needle <NUM> protective cap <NUM>. In some embodiments, fluid reservoir <NUM> is sealed for sterility with a seal <NUM>. In some embodiments, pre-filled fluid reservoir <NUM> attached to needle-bearing portion <NUM> is delivered in an envelope e.g., a plastic blister <NUM>. Reference is now made to <FIG>, which is a plan view simplified illustration of a home kit for self-injection. As shown in <FIG>, in some embodiments a kit <NUM> comprises a self-injector, represented in <FIG> by a modular support plate <NUM>, a plurality of fasteners <NUM> and a variety of fittings <NUM> comprising various internal diameters.

Additionally and optionally, in some embodiments kit <NUM> may comprise markings that assist a user to select the correct fastener or fitting for the corresponding selected fluid reservoir. For example, in the exemplary embodiment depicted in <FIG>, for a selected 50cc fluid reservoir the user may select only fasteners to sufficiently couple the fluid reservoir to the self-injector. For a smaller sized fluid reservoir, e.g., 10cc fluid reservoir the user may select a fastener and a fitting marked "10cc" to be inserted into the fastener. In some embodiments, kit <NUM> comprises clearly marked indicators as to fitting sizes and types of fasteners and fittings e.g., "5cc", "10cc", "20cc", "50cc", "tip", "Flange", etc..

In some embodiments, a user would use kit <NUM> to couple a fluid reservoir to a self-injector by removing the self-injector from the kit and opening a cover to expose support plate <NUM>. In some embodiments, the method further comprises coupling needle bearing portion <NUM> to the fluid reservoir. In some embodiments, needle bearing portion <NUM> comprises a needle protective cap <NUM>. In some embodiments, the method further comprises selecting one or more fasteners <NUM> and sliding one or more fasteners on a barrel <NUM>/<NUM> of a fluid reservoir. Alternatively and optionally the method comprises coupling one or more fasteners <NUM> to support plate <NUM>. Optionally, the method comprises inserting one or more fittings <NUM> into one or more fasteners <NUM> before sliding onto a barrel <NUM>/<NUM> of a fluid reservoir. Additionally and optionally, the method comprises selecting a finger flange fastener <NUM> and coupling the fluid reservoir flange to support plate <NUM>. Optionally, the method comprises inserting one or more finger flange fittings <NUM> into one or more fasteners <NUM> before coupling the fluid reservoir flange to support plate <NUM>. Optionally, the method comprises selecting at least one attachment points <NUM>/<NUM> and attaching a fastener <NUM>/<NUM> to the selected attachment points <NUM>/<NUM>.

The terms "comprises", "comprising", "includes", "including", "has", "having" and their conjugates mean "including but not limited to".

As used herein, the singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise.

Throughout this application, embodiments of this invention may be presented with reference to a range format. For example, description of a range such as "from <NUM> to <NUM>" should be considered to have specifically disclosed subranges such as "from <NUM> to <NUM>", "from <NUM> to <NUM>", "from <NUM> to <NUM>", "from <NUM> to <NUM>", "from <NUM> to <NUM>", "from <NUM> to <NUM>", etc.; as well as individual numbers within that range, for example, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM>.

Unless otherwise indicated, numbers used herein and any number ranges based thereon are approximations within the accuracy of reasonable measurement and rounding errors as understood by persons skilled in the art.

Claim 1:
An add-on for a self-injector (<NUM>, <NUM>) comprising:
an adaptor (<NUM>) comprising at a first end a first fluid reservoir coupling (<NUM>) sized and shaped to couple said adaptor (<NUM>) to a fluid reservoir (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) and a second coupling (<NUM>) at a second end of the adaptor, at least a portion of said reservoir (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) being made of glass or a plastic material, and
a hollow needle (<NUM>) that is bent at a <NUM>-degree angle to define a bent fluid path between the first fluid reservoir coupling (<NUM>) and the second coupling (<NUM>),
wherein the second coupling (<NUM>) is a Luer lock coupling and is configured to couple to a needle (<NUM>), and
wherein said add-on coupled to said fluid reservoir (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) forms an integral self-injector cartridge unit (<NUM>, <NUM>) configured to be sterilized and filled with an injectable.