US20200254192A1 - Pen Needle with Outer Cover - Google Patents
Pen Needle with Outer Cover Download PDFInfo
- Publication number
- US20200254192A1 US20200254192A1 US16/859,801 US202016859801A US2020254192A1 US 20200254192 A1 US20200254192 A1 US 20200254192A1 US 202016859801 A US202016859801 A US 202016859801A US 2020254192 A1 US2020254192 A1 US 2020254192A1
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- United States
- Prior art keywords
- hub
- needle
- outer cover
- pen
- proximal end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/002—Packages specially adapted therefor, e.g. for syringes or needles, kits for diabetics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3293—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles characterised by features of the needle hub
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5086—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile for indicating if defective, used, tampered with or unsterile
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4416—Network booting; Remote initial program loading [RIPL]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0876—Network architectures or network communication protocols for network security for authentication of entities based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
- H04W12/069—Authentication using certificates or pre-shared keys
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
- A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
- A61M2005/3254—Shielding of proximal needles, e.g. for pen needles
Definitions
- the invention is the field of medication delivery devices, and in particular, the invention is directed to medication pens, and specifically, a pen needle having an outer cover that facilitates installation of the pen needle on a medication pen body and subsequent removal of the pen needle after use with simultaneous protection of the non-patient end cannula.
- Pen needles are widely used in medication delivery systems for self-administered injectable drugs.
- the pen needle is provided in an outer cap which is sealed with a layered paper and foil “teardrop label.”
- the user removes the heat sealed tear-drop label from the outer cap to expose the proximal or “non-patient’ end needle located in a cavity on the proximal end of the needle-bearing hub.
- the exposed needle-bearing hub is then threaded onto a medication pen such that the non-patient end of the needle pierces the closure of the drug storage compartment of the medication pen.
- the cap is removed, and a smaller needle shield, which slides over a post on the hub supporting the patient-end needle, is also removed prior to performing an injection.
- the cap may also be used to remove the needle-hub assembly.
- one object of the invention is to provide a pen needle that self-aligns on the medication pen during installation.
- Another object of the invention is to provide a cover over the non-patient end needle that may be re-closed after use or after opening but prior to installation on the pen.
- the outer cover in this embodiment may be provided with a cut out defining a flexible strip in a sidewall of the outer cover inboard of the open proximal end.
- a radially inward facing projection on the strip engages contours on a radially outward surface of the hub, so that when the outer cover is rotated with respect to the hub the projection generates an audible sound or tactile sensation as the projection on the strip snaps against the contours on the hub.
- the strip is oriented circumferentially and acts as a pawl mechanism, resisting rotation in the counterclockwise direction.
- a pen needle is provided with an outer cover having a closed distal end with tapered sides affording a finger hold and an open proximal end receiving a needle-bearing hub.
- the hub has longitudinal cutouts extending to the proximal edge of the outer cover defining a plurality of projections extending proximally from the proximal open end and curved radially outwardly from the hub.
- the projections In the initial state, with the needle-bearing hub contained in the outer cover, the projections extend beyond the proximal end of the hub and flex slightly inward to protect the user from needle stick from the non-patient end needle.
- projections flex outwardly to release the needle bearing hub during installation and flex inwardly to contain the needle bearing hub for storage.
- the invention is directed to a pen needle outer cover with an extended proximal end side wall, such that the outer cover side wall on the proximal end extends beyond the end of the non-patient end needle. Therefore, the needle is recessed in a cavity on the proximal end of the pen needle and the hub cannot be mated with the medication pen until the needle is axially aligned with the medication pen. This arrangement ensures that the hub is self-aligned with the medication pen, and that the non-patient end needle is always in the proper axial orientation with respect to the medication pen before the hub is mated onto the medication pen.
- FIG. 1 depicts an outer cover and hub assembly according to an embodiment of the invention.
- FIG. 4 is a cutaway view of the interior of the outer cover of FIG. 3 .
- FIG. 5 is a perspective view of a hub assembly according to an embodiment of the invention.
- FIG. 7 is an exploded view of the assembly of FIG. 6 .
- FIG. 10 is a pen needle outer cover having an extended side wall.
- FIG. 11 is hub adapted to be received in the pen needle outer cover of FIG. 10 .
- FIG. 12 shows the engagement of a medication pen with a hub according to FIG. 11 received in pen needle outer cover according to FIG. 10 .
- distal direction is in the direction of the injection site, and the “proximal direction” is the opposite direction.
- the “axial” direction is along the longitudinal axis of the injection device and a “diameter” is generally a diameter with respect to a longitudinal axis.
- the cannula is generally arranged axially in the device.
- “Radially” is a direction perpendicular to the axial direction.
- “radially inward” generally means closer to the needle.
- An element extending in the “circumferential direction” means that the element extends around the circumference; for example threads on a medication pen are arranged circumferentially on the distal end of the pen.
- Medical pen is used broadly herein to refer to any prefilled medication delivery device. However, in the most preferred embodiments a medication pen is characterized by having a pen-shaped body and a proximally located thumb button adapted for automatic dosing.
- a “cut-out” refers to a feature on a surface defined by through-openings in the surface (inner and outer sides of the surface); a cut-out is said to be “inboard” if the opening(s) do not extend to the edge of the surface.
- Non-patient end needle 26 is adapted to pierce the septum of a medication cartridge within a medication pen body when the hub is installed, and preferably needle 26 does not project beyond the plane formed by proximal edge 29 of the opening of hub 10 .
- the patient end needle and the non-patient end needle are opposite ends of a single stainless steel cannula which is beveled to a point on each end and is affixed in an axial bore in the hub by adhesive or other means.
- Reference to a “patient end needle” and a “non-patient end needle” refers to the needle points—typically (but not necessarily) they are opposite ends of the same cannula.
- guard flap 28 is attached to proximal edge 29 of hub 10 by hinge 27 which is capable of maintaining at least two positions: a first open position for installing the hub and a second closed position for transporting the hub or discarding after use.
- hinge 27 is capable of maintaining at least two positions: a first open position for installing the hub and a second closed position for transporting the hub or discarding after use.
- flap 28 shields the non-patient end needle 26 from accidental needle stick.
- the flap 28 In the open state shown in FIG. 2 , non-patient end needle 26 is exposed, the flap 28 is parallel with the axis of the needle, and the hub can be threaded onto a medication delivery device.
- Plastic camming and locking elements may be provided on the hinge, bearing against the hub or outer cover to retain the flap in the first or second position and providing resistance when the flap is moved from the first to the second position or from the second position to the first.
- Various hinge constructions are known in the art which can be adapted for use with injection molded parts, such as a one-piece living hinge, which may be molded with hub 10 , including flap 28 in the same process.
- Hinges, including camming elements and locking fixtures are disclosed, for example, in U.S. Pat. No. 8,887,912, which is incorporated by reference for this purpose.
- the hinge design may be left to the person of ordinary skill in the art.
- flap 28 may be hinged to outer cover 12 instead of the hub.
- flap 28 may be provided with two closed positions: a first closed position where the flap is held releasably (against the resistance of a camming surface, for example), which allows the hub to be transported and later opened, so that the needle-bearing hub can be installed on a medication pen; and a second position in which the flap is permanently locked in the closed position for disposal. As shown in FIG. 1 , a portion 30 of the flap 28 may project outwardly beyond an outer periphery of the outer cover 12 in the first and/or second closed position.
- outer surface of hub 10 is preferably provided with a series of longitudinally arranged grooves 24 which cooperate with a strip 33 formed on outer cover 12 to provide an audible indication when the hub is fully installed on the medication pen.
- strip 32 is formed between cuts 34 formed at the open proximal end of the outer cover 12 such that the strip 32 can be flexed with respect to the outer cover 12 .
- the inside of the outer cover 12 includes a projection 38 formed on a radially inward surface of the strip 32 .
- a similar projection may be provided on a radially inward surface of strip 33 in the embodiment of FIG. 9 .
- the hub and outer cover initially rotate in unison. This may be ensured by providing an interference fit between hub 10 and outer cover 12 .
- longitudinal ribs 36 on an interior surface of outer cover 12 engage hub 10 to provide the interference fit.
- turning the outer cover further causes the outer cover 12 to rotate with respect to the hub.
- Flexible strip 32 flexes as the projection 38 is dragged across the grooves 24 making an audible ratchet sound and/or providing a tactile sensation which indicates that the hub is fully installed on the medication pen.
- strip 33 is oriented circumferentially on the outer cover inboard of the open proximal end, so that strip 33 acts as a pawl mechanism.
- an inward facing projection on strip 33 (not shown in FIG. 9 ) is dragged across contours 24 on the hub when the outer cover is rotated in a clockwise direction after the hub is fully seated on a medication pen, but reversing the direction causes outer cover 12 and hub 10 to rotate together when hub 10 is uninstalled from the medication pen for disposal.
- Distal face 52 of needle-bearing hub 10 is shown in FIG. 5 and FIG. 8 .
- distal face 52 of hub 10 is predominately flat, from the needle to the periphery of the hub, except for an annular channel 54 around the needle.
- a needle bearing post is recessed in the hub and the annular channel 54 is formed radially around patient end needle 22 .
- This annular channel 54 receives an inner needle shield 72 which is provided with flange 137 (inner shield 72 including flange 137 may be substantially identical to the embodiment shown in FIG. 7 ) to situate the inner shield 72 in the annular channel 54 .
- a hub with a flat pressure pad area is disclosed in U.S. Patent Application Publication No. 2009/0069755, which is incorporated by reference in its entirety for this purpose.
- flap 28 is opened from the closed position shown in FIG. 1 , until it aligns with the longitudinal axis of the pen needle, in the position shown in FIG. 9 .
- the user holds the hub by outer cover 12 and installs internally threaded hub 10 on a medication pen by rotating the assembly clockwise onto the threaded end of the pen.
- outer cover 12 rotates with respect to hub 10 after the hub has been fully installed, and the projection on strip 33 makes a ratchet sound as it drags across the grooves 24 on the hub.
- the outer cover is removed by pulling distally, leaving the hub secured on the medication pen.
- the medication pen is readied for administering an injection.
- the outer cover is replaced and turned counterclockwise to remove the hub from the pen. Flap 28 may thereafter be closed to prevent accidental needle stick during disposal.
- FIG. 6 depicts another embodiment of the invention wherein the open proximal end of outer cover 60 assists in grasping the pen needle.
- Outer cover 60 has tapered sides adapted to be gripped by thumb and forefinger, meeting at a curved closed distal end 61 .
- the tapered sides are gently concave to provide a finger hold, as in the previous embodiment.
- the tapered sides on the outer cover may be provided with ribs 82 to enhance the user's finger hold, meeting at a curved distal end, as shown in FIG. 6 .
- the open proximal end is configured with longitudinal cut-outs 62 extending to the proximal edge of the outer cover defining a plurality of projections 64 extending proximally and curved radially outwardly from the hub.
- projections 64 extend beyond the hub in the proximal direction when the hub is received fully within the outer cover, which protects the user from accidental needle stick from the non-patient end needle. Projections 64 are formed to flex outwardly when cover 60 is pulled off the hub, for example.
- FIG. 7 shows hub 10 aligned with inner needle shield 72 in the orientation that these elements are inserted in outer cover 60 .
- the outer radial surface of hub 10 may be provided with contours.
- cut-out 84 forms a flap 104 inboard of the open proximal end.
- the flap is provided with a projection facing radially inward toward the hub (not shown in the Figure).
- the circumferential orientation of inboard flap 104 acts as a pawl, resisting rotation of the outer cover with respect to the hub in the counterclockwise direction.
- Distal patient-facing side 52 of hub 10 is shown in FIG. 8 .
- the effective penetration depth of the needle is not critical and may be 4 mm to 8 mm, or other standard length known in the art, or a non-standard length.
- the hub post 57 bearing the needle is embedded in the hub.
- Annular slot 54 is provided around the hub post to accommodate inner needle shield 72 .
- Inner needle shield is provided with a flange 137 to fit securely in the annular slot.
- the installation sequence for the needle-bearing hub with the outer cover of FIG. 6 is similar to the sequence for the outer cover of FIG. 1 .
- hub 10 is within outer cover 60 and projections 64 on outer cover 60 extend beyond the distal end of the hub and bend slightly inwardly to protect the user from the non-patient end of the needle on the hub. Pressing outer cover 60 onto the threaded end of a medication pen causes projections 64 to flare outward, which allows medication pen to access hub 10 and for hub 10 to be threaded onto a pen with a clockwise turn of outer cover 60 .
- outer cover 60 causes outer cover 60 to rotate with respect to hub 10 , creating an audible and/or tactile indication as the flexible strip 104 on the sidewall of the outer cover drags across the contoured surface of hub 10 .
- outer cover 60 can be removed by pulling it in the distal direction. The user removes inner shield 72 covering the needle and the pen is injection-ready.
- cover 60 is placed proximally over the hub, rotated counter-clockwise, and pulled distally with hub 10 substantially enclosed within projections 64 of the outer cover.
- FIG. 10 A further aspect of the invention is depicted in FIG. 10 through FIG. 13 .
- outer cover 100 is provided with an extended proximal side wall 101 extending beyond the tip of non-patient end needle 126 when hub 110 is received in outer cover 100 .
- FIG. 11 depicts hub 110 , which, in this embodiment, is likewise provided with an extension 111 beyond proximal end of non-patient end needle 126 .
- Extended side wall 101 prevents inadvertent contact of medication pen 120 with non-patient end needle 126 .
- the extended flange features 101 , 111 are provided so that cover 100 and hub 110 , assembled together, self-align when installed on medication pen 120 .
- the diameter of the proximal end side wall of the outer cover is larger than the diameter of the proximal end of the hub.
- extended side wall 101 orients the medication pen as it is inserted in the opening. Any extension of the outer cover in the proximal direction beyond the proximal end of the hub will assist in guiding outer cover 100 , and therefore hub 110 , onto a medication pen.
- an extended side wall of 0.01 inch to 1.00 inch is operable.
- the side wall extends about 0.20 inch to about 1.00 inch beyond the needle, and more preferably the extended flange has a length of about 0.25 inch to about 0.50 inch beyond the proximal end of the non-patient end needle.
- proximal end flange portions of cover 101 and proximal end flange portion of hub 111 slopeped sides 121 on an internal surface of cover 100 between proximal end sidewall 101 and a distal portion of cover 100 guide medication pen 120 into place irrespective of the angle at which the user initially places the assembly on medication pen 120 .
- hub 110 is provided with extended proximal end sidewall 111
- engagement of hub extended sidewall 111 and outer cover extended sidewall 101 prevents hub 110 from moving during installation on a medication pen.
- a friction fit may be provided between hub 110 and cover 100 , for example using sloped inward projecting ribs on cover 100 which fit against hub 110 .
- a locking feature such as a protuberance or groove on hub 110 may cooperate with a cooperating feature on outer cover 100 to retain hub 110 in place during installation.
- a locking feature, if used, may be overcome by pulling the outer cover distally from the hub after installation.
- Cover 100 may be made transparent so a user can view the status of the medication in pen 120 .
- the installed state is depicted in FIG. 13 .
- the plastic parts described herein, including the hub and outer cover in all the embodiments, are made of polymers suitable for injection molding, including without limitation, polypropylene and others known in the art. Likewise, techniques for injection molding, draw molding and the like, are well known to those having skill in the art of manufacturing medication pens. However, the invention is not limited to any particular production method.
- the needle is typically a standard gauge surgical stainless steel part. Pen needles according to the invention are designed to be user-friendly, adapted for self-administered medications, such as insulin, but the invention is not limited to any particular medication.
- the 4 mm-8 mm injection depth needle described above is suited for subcutaneous injection, the invention may also be adapted for use with intradermal injection.
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Abstract
Description
- This application is a division of U.S. patent application Ser. No. 15/100,279, filed on May 27, 2016, which is the U.S. national stage under 35 U.S.C. 371 of International Patent Application No. PCT/US2014/068567, filed on Dec. 4, 2014, which claims the benefit of U.S. Provisional Patent Application No. 61/912,538, filed on Dec. 5, 2013, all of said prior applications being expressly incorporated herein by reference.
- The invention is the field of medication delivery devices, and in particular, the invention is directed to medication pens, and specifically, a pen needle having an outer cover that facilitates installation of the pen needle on a medication pen body and subsequent removal of the pen needle after use with simultaneous protection of the non-patient end cannula.
- Pen needles are widely used in medication delivery systems for self-administered injectable drugs. In one popular arrangement, the pen needle is provided in an outer cap which is sealed with a layered paper and foil “teardrop label.” The user removes the heat sealed tear-drop label from the outer cap to expose the proximal or “non-patient’ end needle located in a cavity on the proximal end of the needle-bearing hub. The exposed needle-bearing hub is then threaded onto a medication pen such that the non-patient end of the needle pierces the closure of the drug storage compartment of the medication pen. The cap is removed, and a smaller needle shield, which slides over a post on the hub supporting the patient-end needle, is also removed prior to performing an injection. The cap may also be used to remove the needle-hub assembly. Although this system has garnered public acceptance, it is nevertheless desirable to enhance ease of use.
- To avoid difficulty aligning the non-patient end needle with the medication pen to thread the pen needle on the pen, one object of the invention is to provide a pen needle that self-aligns on the medication pen during installation. Another object of the invention is to provide a cover over the non-patient end needle that may be re-closed after use or after opening but prior to installation on the pen.
- According to one embodiment of the invention, the foregoing objectives are achieved using a pen needle comprising: an outer cover having a closed distal end with gently concave sides affording a finger hold and an open proximal end receiving a needle-bearing hub. The needle bearing hub according to this embodiment has an open proximal end defined by a proximal edge aligned with the open proximal end of the outer cover in the initial state. A flap hinged to the proximal edge of the hub (or to the open end of the outer cover) has an open position permitting installation of the hub on the medication pen and a closed position enclosing the non-patient end of the needle within the hub (or within the outer cover).
- The outer cover in this embodiment may be provided with a cut out defining a flexible strip in a sidewall of the outer cover inboard of the open proximal end. A radially inward facing projection on the strip engages contours on a radially outward surface of the hub, so that when the outer cover is rotated with respect to the hub the projection generates an audible sound or tactile sensation as the projection on the strip snaps against the contours on the hub. In some embodiments, the strip is oriented circumferentially and acts as a pawl mechanism, resisting rotation in the counterclockwise direction.
- In another embodiment according to the invention, a pen needle is provided with an outer cover having a closed distal end with tapered sides affording a finger hold and an open proximal end receiving a needle-bearing hub. The hub has longitudinal cutouts extending to the proximal edge of the outer cover defining a plurality of projections extending proximally from the proximal open end and curved radially outwardly from the hub. In the initial state, with the needle-bearing hub contained in the outer cover, the projections extend beyond the proximal end of the hub and flex slightly inward to protect the user from needle stick from the non-patient end needle. Thus, in this embodiment, projections flex outwardly to release the needle bearing hub during installation and flex inwardly to contain the needle bearing hub for storage.
- As in the previous embodiment, a flexible strip may be formed in a sidewall of the outer cover, provided inboard of the open proximal end, with an inward-facing projection on the strip engaging contours on a radially outward surface of the hub, so that when the outer cover is rotated with respect to the hub, the projection provides sensory feedback as it contacts the contours on the hub surface. The strip is oriented circumferentially, so that it acts as a pawl mechanism, resisting rotation in the counterclockwise direction.
- In another aspect, the invention is directed to a pen needle outer cover with an extended proximal end side wall, such that the outer cover side wall on the proximal end extends beyond the end of the non-patient end needle. Therefore, the needle is recessed in a cavity on the proximal end of the pen needle and the hub cannot be mated with the medication pen until the needle is axially aligned with the medication pen. This arrangement ensures that the hub is self-aligned with the medication pen, and that the non-patient end needle is always in the proper axial orientation with respect to the medication pen before the hub is mated onto the medication pen.
-
FIG. 1 depicts an outer cover and hub assembly according to an embodiment of the invention. -
FIG. 2 depicts the outer cover and hub assembly ofFIG. 1 in an exploded view. -
FIG. 3 depicts a perspective view of an outer cover according to an embodiment of the invention. -
FIG. 4 is a cutaway view of the interior of the outer cover ofFIG. 3 . -
FIG. 5 is a perspective view of a hub assembly according to an embodiment of the invention. -
FIG. 6 is a perspective view of an outer cover according to another embodiment of the invention. -
FIG. 7 is an exploded view of the assembly ofFIG. 6 . -
FIG. 8 is a view of the needle-bearing hub according to one embodiment of the invention, showing the distal patient-facing side with a slot for receiving an inner needle shield. -
FIG. 9 is a view of the outer cover and hub assembly ofFIG. 1 in the open position. -
FIG. 10 is a pen needle outer cover having an extended side wall. -
FIG. 11 is hub adapted to be received in the pen needle outer cover ofFIG. 10 . -
FIG. 12 shows the engagement of a medication pen with a hub according toFIG. 11 received in pen needle outer cover according toFIG. 10 . -
FIG. 13 shows the assembly ofFIG. 12 with the hub seated on the medication pen. - The figures are schematic for the purpose of illustrating the invention and not drawn to scale. Features may be enlarged, made smaller, simplified, or eliminated to show how the parts operate according to the invention.
- As used herein, the “distal” direction is in the direction of the injection site, and the “proximal direction” is the opposite direction. The “axial” direction is along the longitudinal axis of the injection device and a “diameter” is generally a diameter with respect to a longitudinal axis. The cannula is generally arranged axially in the device. “Radially” is a direction perpendicular to the axial direction. Thus, “radially inward” generally means closer to the needle. An element extending in the “circumferential direction” means that the element extends around the circumference; for example threads on a medication pen are arranged circumferentially on the distal end of the pen. “Medication pen” is used broadly herein to refer to any prefilled medication delivery device. However, in the most preferred embodiments a medication pen is characterized by having a pen-shaped body and a proximally located thumb button adapted for automatic dosing. A “cut-out” refers to a feature on a surface defined by through-openings in the surface (inner and outer sides of the surface); a cut-out is said to be “inboard” if the opening(s) do not extend to the edge of the surface.
- The pen needles according to the invention are provided with a cover that has tapered sides to facilitate gripping and means to engage the hub in the outer cover so that the two elements rotate together as the hub is installed on a pen needle. The tapered sides are gently concave to conform approximately to a user's fingers to provide a finger hold. In multiple embodiments, the outer cover is provided with a flexing strip which contacts contours on the radially outer surface of the hub to provide an audible indication when the outer cover rotates with respect to the hub after the needle-bearing hub is installed on a medication pen. The strip may have a pawl mechanism so that the outer cover resists rotation with respect to the hub in the counter-clockwise direction when the hub is being removed.
- In the embodiment of
FIG. 1 ,outer cover 12 has closeddistal end 14 formed by concavetapered sides 16 terminating atcorners 13. A side of the closed distal end opposite the corners is rounded. The taperedsides 16 prompt and facilitate gripping with the thumb and index finger, and may be provided withribs 18 for this purpose.Sides 16 are described as “gently concave” which is intended to convey that they are shaped to hold with the fingers.Hub 10 is received in the proximal end of theouter cover 12. The exploded view ofFIG. 2 shows the orientation of thehub 10 as it fits in theouter cover 12, such that thepatient end needle 22 projects from the patient-facing surface ofhub 10 into the inside ofouter cover 12. The open end of needle-bearinghub 10 is adapted to be attached to a medication pen. Typically, the hub is adapted with threads, mating with corresponding threads on the medication pen. However, the hub may be adapted with one or more groove(s) and/or protuberance(s) mating with a corresponding groove(s) and/or protuberance(s) on the medication pen allowing the hub to be installed, with or without rotation, and snapped in place. A friction fit between the hub and medication pen may also be employed. The attachment means are left to the skill of the artisan to select.Proximal edge 29 defining the open end ofhub 10 is aligned with the open end of thehub cover 12 in the assembled state.Non-patient end needle 26 is adapted to pierce the septum of a medication cartridge within a medication pen body when the hub is installed, and preferably needle 26 does not project beyond the plane formed byproximal edge 29 of the opening ofhub 10. Typically, the patient end needle and the non-patient end needle are opposite ends of a single stainless steel cannula which is beveled to a point on each end and is affixed in an axial bore in the hub by adhesive or other means. Reference to a “patient end needle” and a “non-patient end needle” refers to the needle points—typically (but not necessarily) they are opposite ends of the same cannula. - In the embodiment depicted,
guard flap 28 is attached toproximal edge 29 ofhub 10 byhinge 27 which is capable of maintaining at least two positions: a first open position for installing the hub and a second closed position for transporting the hub or discarding after use. In the closed position, shown inFIG. 1 ,flap 28 shields thenon-patient end needle 26 from accidental needle stick. In the open state shown inFIG. 2 ,non-patient end needle 26 is exposed, theflap 28 is parallel with the axis of the needle, and the hub can be threaded onto a medication delivery device. Plastic camming and locking elements (not shown) may be provided on the hinge, bearing against the hub or outer cover to retain the flap in the first or second position and providing resistance when the flap is moved from the first to the second position or from the second position to the first. Various hinge constructions are known in the art which can be adapted for use with injection molded parts, such as a one-piece living hinge, which may be molded withhub 10, includingflap 28 in the same process. Hinges, including camming elements and locking fixtures, are disclosed, for example, in U.S. Pat. No. 8,887,912, which is incorporated by reference for this purpose. The hinge design may be left to the person of ordinary skill in the art. In embodiments,flap 28 may be hinged toouter cover 12 instead of the hub. - In embodiments,
flap 28 may be provided with two closed positions: a first closed position where the flap is held releasably (against the resistance of a camming surface, for example), which allows the hub to be transported and later opened, so that the needle-bearing hub can be installed on a medication pen; and a second position in which the flap is permanently locked in the closed position for disposal. As shown inFIG. 1 , aportion 30 of theflap 28 may project outwardly beyond an outer periphery of theouter cover 12 in the first and/or second closed position. - In the embodiment shown in
FIG. 9 , outer surface ofhub 10 is preferably provided with a series of longitudinally arrangedgrooves 24 which cooperate with astrip 33 formed onouter cover 12 to provide an audible indication when the hub is fully installed on the medication pen. In the embodiment shown inFIG. 3 ,strip 32 is formed betweencuts 34 formed at the open proximal end of theouter cover 12 such that thestrip 32 can be flexed with respect to theouter cover 12. As shown in the interior cutaway view ofFIG. 4 , the inside of theouter cover 12 includes aprojection 38 formed on a radially inward surface of thestrip 32. A similar projection (not shown) may be provided on a radially inward surface ofstrip 33 in the embodiment ofFIG. 9 . In the case where the hub is attached to the medication pen by rotating the hub onto a threaded connection, the hub and outer cover initially rotate in unison. This may be ensured by providing an interference fit betweenhub 10 andouter cover 12. Optionally,longitudinal ribs 36 on an interior surface ofouter cover 12 engagehub 10 to provide the interference fit. However, oncehub 10 is fully threaded onto the medication pen, turning the outer cover further causes theouter cover 12 to rotate with respect to the hub.Flexible strip 32 flexes as theprojection 38 is dragged across thegrooves 24 making an audible ratchet sound and/or providing a tactile sensation which indicates that the hub is fully installed on the medication pen. - In
FIG. 9 ,strip 33 is oriented circumferentially on the outer cover inboard of the open proximal end, so thatstrip 33 acts as a pawl mechanism. In this configuration an inward facing projection on strip 33 (not shown inFIG. 9 ) is dragged acrosscontours 24 on the hub when the outer cover is rotated in a clockwise direction after the hub is fully seated on a medication pen, but reversing the direction causesouter cover 12 andhub 10 to rotate together whenhub 10 is uninstalled from the medication pen for disposal. -
Distal face 52 of needle-bearinghub 10 according to different embodiments of the invention is shown inFIG. 5 andFIG. 8 . As seen inFIG. 5 andFIG. 8 ,distal face 52 ofhub 10 is predominately flat, from the needle to the periphery of the hub, except for anannular channel 54 around the needle. A needle bearing post is recessed in the hub and theannular channel 54 is formed radially aroundpatient end needle 22. Thisannular channel 54 receives aninner needle shield 72 which is provided with flange 137 (inner shield 72 includingflange 137 may be substantially identical to the embodiment shown inFIG. 7 ) to situate theinner shield 72 in theannular channel 54. A hub with a flat pressure pad area is disclosed in U.S. Patent Application Publication No. 2009/0069755, which is incorporated by reference in its entirety for this purpose. - To install a
needle bearing hub 10 onto a medication pen using the outer cover ofFIG. 1 ,flap 28 is opened from the closed position shown inFIG. 1 , until it aligns with the longitudinal axis of the pen needle, in the position shown inFIG. 9 . In this state, the user holds the hub byouter cover 12 and installs internally threadedhub 10 on a medication pen by rotating the assembly clockwise onto the threaded end of the pen. At a certain point, whenhub 10 is fully seated,outer cover 12 rotates with respect tohub 10 after the hub has been fully installed, and the projection onstrip 33 makes a ratchet sound as it drags across thegrooves 24 on the hub. The outer cover is removed by pulling distally, leaving the hub secured on the medication pen. In this state, the medication pen is readied for administering an injection. The outer cover is replaced and turned counterclockwise to remove the hub from the pen.Flap 28 may thereafter be closed to prevent accidental needle stick during disposal. -
FIG. 6 depicts another embodiment of the invention wherein the open proximal end ofouter cover 60 assists in grasping the pen needle.Outer cover 60 has tapered sides adapted to be gripped by thumb and forefinger, meeting at a curved closeddistal end 61. The tapered sides are gently concave to provide a finger hold, as in the previous embodiment. The tapered sides on the outer cover may be provided withribs 82 to enhance the user's finger hold, meeting at a curved distal end, as shown inFIG. 6 . The open proximal end is configured with longitudinal cut-outs 62 extending to the proximal edge of the outer cover defining a plurality ofprojections 64 extending proximally and curved radially outwardly from the hub. Theprojections 64 extend beyond the hub in the proximal direction when the hub is received fully within the outer cover, which protects the user from accidental needle stick from the non-patient end needle.Projections 64 are formed to flex outwardly whencover 60 is pulled off the hub, for example. - The exploded view of
FIG. 7 showshub 10 aligned withinner needle shield 72 in the orientation that these elements are inserted inouter cover 60. As in the previous embodiment and as shown inFIG. 7 , the outer radial surface ofhub 10 may be provided with contours. As shown inFIG. 6 , cut-out 84 forms aflap 104 inboard of the open proximal end. The flap is provided with a projection facing radially inward toward the hub (not shown in the Figure). The circumferential orientation ofinboard flap 104 acts as a pawl, resisting rotation of the outer cover with respect to the hub in the counterclockwise direction. - Distal patient-facing
side 52 ofhub 10 according to one embodiment of the invention is shown inFIG. 8 . The effective penetration depth of the needle is not critical and may be 4 mm to 8 mm, or other standard length known in the art, or a non-standard length. In the embodiment shown, thehub post 57 bearing the needle is embedded in the hub.Annular slot 54 is provided around the hub post to accommodateinner needle shield 72. Inner needle shield is provided with aflange 137 to fit securely in the annular slot. - The installation sequence for the needle-bearing hub with the outer cover of
FIG. 6 is similar to the sequence for the outer cover ofFIG. 1 . Before use,hub 10 is withinouter cover 60 andprojections 64 onouter cover 60 extend beyond the distal end of the hub and bend slightly inwardly to protect the user from the non-patient end of the needle on the hub. Pressingouter cover 60 onto the threaded end of a medication pen causesprojections 64 to flare outward, which allows medication pen to accesshub 10 and forhub 10 to be threaded onto a pen with a clockwise turn ofouter cover 60. Turningouter cover 60 beyond the point at which the hub is fully installed on the pen, causesouter cover 60 to rotate with respect tohub 10, creating an audible and/or tactile indication as theflexible strip 104 on the sidewall of the outer cover drags across the contoured surface ofhub 10. At this point,outer cover 60 can be removed by pulling it in the distal direction. The user removesinner shield 72 covering the needle and the pen is injection-ready. To remove andstore hub 10 for disposal,cover 60 is placed proximally over the hub, rotated counter-clockwise, and pulled distally withhub 10 substantially enclosed withinprojections 64 of the outer cover. - A further aspect of the invention is depicted in
FIG. 10 throughFIG. 13 . InFIG. 10 ,outer cover 100 is provided with an extendedproximal side wall 101 extending beyond the tip ofnon-patient end needle 126 whenhub 110 is received inouter cover 100.FIG. 11 depictshub 110, which, in this embodiment, is likewise provided with anextension 111 beyond proximal end ofnon-patient end needle 126.Extended side wall 101 prevents inadvertent contact ofmedication pen 120 withnon-patient end needle 126. As shown inFIG. 12 andFIG. 13 , the extended flange features 101, 111 are provided so thatcover 100 andhub 110, assembled together, self-align when installed onmedication pen 120. Some clearance is provided betweencover 100 andmedication pen 120 to permithub 110 to be installed onmedication pen 120, by threading or the like. Therefore, the diameter of the proximal end side wall of the outer cover is larger than the diameter of the proximal end of the hub. - In order to prevent
non-patient end needle 126 from enteringmedication pen 120 at an angle, bending, and possibly failing to reach medication in a medication compartment therein,extended side wall 101 orients the medication pen as it is inserted in the opening. Any extension of the outer cover in the proximal direction beyond the proximal end of the hub will assist in guidingouter cover 100, and thereforehub 110, onto a medication pen. For example, an extended side wall of 0.01 inch to 1.00 inch is operable. Preferably the side wall extends about 0.20 inch to about 1.00 inch beyond the needle, and more preferably the extended flange has a length of about 0.25 inch to about 0.50 inch beyond the proximal end of the non-patient end needle. These dimensions apply to the proximal end flange portions ofcover 101 and proximal end flange portion ofhub 111. Sloped sides 121 on an internal surface ofcover 100 betweenproximal end sidewall 101 and a distal portion ofcover 100guide medication pen 120 into place irrespective of the angle at which the user initially places the assembly onmedication pen 120. Wherehub 110 is provided with extendedproximal end sidewall 111, engagement of hub extendedsidewall 111 and outer cover extendedsidewall 101 preventshub 110 from moving during installation on a medication pen. Alternatively, or in addition, for this purpose, a friction fit may be provided betweenhub 110 and cover 100, for example using sloped inward projecting ribs oncover 100 which fit againsthub 110. Alternatively a locking feature such as a protuberance or groove onhub 110 may cooperate with a cooperating feature onouter cover 100 to retainhub 110 in place during installation. A locking feature, if used, may be overcome by pulling the outer cover distally from the hub after installation. - Cover 100 may be made transparent so a user can view the status of the medication in
pen 120. The installed state is depicted inFIG. 13 . - The plastic parts described herein, including the hub and outer cover in all the embodiments, are made of polymers suitable for injection molding, including without limitation, polypropylene and others known in the art. Likewise, techniques for injection molding, draw molding and the like, are well known to those having skill in the art of manufacturing medication pens. However, the invention is not limited to any particular production method. The needle is typically a standard gauge surgical stainless steel part. Pen needles according to the invention are designed to be user-friendly, adapted for self-administered medications, such as insulin, but the invention is not limited to any particular medication. Likewise, although the 4 mm-8 mm injection depth needle described above is suited for subcutaneous injection, the invention may also be adapted for use with intradermal injection.
- The foregoing description of the preferred embodiments is not to be deemed to limit the invention, which is defined by the following claims. The different embodiments are related, such that features recited in the dependent claims are capable of combination with each other, with other independent claims, and with other embodiments.
Claims (6)
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US201615100279A | 2016-05-27 | 2016-05-27 | |
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EP3077020A4 (en) * | 2013-12-05 | 2017-07-19 | Becton, Dickinson and Company | Pen needle outer cover concepts |
USD819198S1 (en) | 2016-04-28 | 2018-05-29 | Amgen Inc. | Autoinjector with removable cap |
KR102544588B1 (en) * | 2017-03-07 | 2023-06-19 | 사노피-아벤티스 도이칠란트 게엠베하 | A drug delivery device including a cap assembly for a drug delivery device, a cap assembly kit, a method for assembling a cap, and a cap assembly |
CN110404132B (en) * | 2018-04-27 | 2023-09-12 | 恩贝克塔公司 | Container for storing pen needles |
EP3643346A1 (en) * | 2018-10-23 | 2020-04-29 | Tecpharma Licensing AG | Infusion set for an infusion device |
USD1010811S1 (en) | 2019-09-30 | 2024-01-09 | Amgen Inc. | Handheld drug delivery device |
USD1030040S1 (en) | 2020-01-14 | 2024-06-04 | Amgen Inc. | Handheld drug delivery device |
USD1030041S1 (en) | 2020-01-14 | 2024-06-04 | Amgen Inc. | Handheld drug delivery device |
USD973866S1 (en) | 2020-11-05 | 2022-12-27 | Amgen Inc. | Handheld drug delivery device |
USD962423S1 (en) | 2020-11-05 | 2022-08-30 | Amgen Inc. | Handheld drug delivery device |
USD974547S1 (en) | 2020-11-05 | 2023-01-03 | Amgen Inc. | Handheld drug delivery device |
USD985117S1 (en) | 2021-03-10 | 2023-05-02 | Amgen Inc. | Handheld drug delivery device |
USD985116S1 (en) | 2021-03-10 | 2023-05-02 | Amgen Inc. | Handheld drug delivery device |
USD985118S1 (en) | 2021-03-10 | 2023-05-02 | Amgen Inc. | Handheld drug delivery device |
USD985119S1 (en) | 2021-03-30 | 2023-05-02 | Amgen Inc. | Handheld drug delivery device |
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- 2014-12-04 WO PCT/US2014/068567 patent/WO2015085068A1/en active Application Filing
- 2014-12-04 CA CA3139649A patent/CA3139649A1/en active Pending
- 2014-12-04 CA CA3139652A patent/CA3139652A1/en active Pending
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2019
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JP6849771B2 (en) | 2021-03-31 |
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CA3139649A1 (en) | 2015-06-11 |
JP6980381B2 (en) | 2021-12-15 |
US20200254191A1 (en) | 2020-08-13 |
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