CA2465502A1 - Pneumatic powered autoinjector - Google Patents

Pneumatic powered autoinjector Download PDF

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Publication number
CA2465502A1
CA2465502A1 CA002465502A CA2465502A CA2465502A1 CA 2465502 A1 CA2465502 A1 CA 2465502A1 CA 002465502 A CA002465502 A CA 002465502A CA 2465502 A CA2465502 A CA 2465502A CA 2465502 A1 CA2465502 A1 CA 2465502A1
Authority
CA
Canada
Prior art keywords
medicament
needle
force
viscous
dispenser
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.)
Granted
Application number
CA002465502A
Other languages
French (fr)
Other versions
CA2465502C (en
Inventor
Pedro De La Serna
Scott Jay Gilbert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alza Corp
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23321842&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2465502(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2465502A1 publication Critical patent/CA2465502A1/en
Application granted granted Critical
Publication of CA2465502C publication Critical patent/CA2465502C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M5/2053—Media being expelled from injector by pressurised fluid or vacuum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/0002—Galenical forms characterised by the drug release technique; Application systems commanded by energy
    • A61K9/0004—Osmotic delivery systems; Sustained release driven by osmosis, thermal energy or gas
    • 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
    • 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
    • A61M5/48—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 varying, regulating, indicating or limiting injection pressure
    • A61M5/482—Varying injection pressure, e.g. by varying speed of injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
    • F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/01—Control of flow without auxiliary power
    • G05D7/0126—Control of flow without auxiliary power the sensing element being a piston or plunger associated with one or more springs
    • G05D7/0133—Control of flow without auxiliary power the sensing element being a piston or plunger associated with one or more springs within the flow-path
    • 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
    • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
    • A61M5/281—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule
    • A61M5/282—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule by compression of deformable ampoule or carpule wall
    • 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
    • A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
    • 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
    • A61M5/46—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 controlling depth of insertion

Abstract

The present invention provides a pneumatic injector that includes a pressurized gas source, an actuator, a driver, and a dispenser. The dispenser of the injector includes a reservoir for containing a desired amount of a chosen medicament and a needle, such as a hypodermic needle, suitable for subcutaneous, intramuscular, or intra-articular delivery of the chosen medicament. The actuator actuates the transmission of pressurized gas from the pressurized gas source to the driver, and as pressurized gas is delivered to the driver, the driver exerts at least an injection force. The injection force is of sufficient magnitude to expel a chosen medicament through the needle of the dispenser within a desired amount of time. Advantageously, the design of the injector of the present invention is extremely flexible, allowing the injector to the designed to deliver a wide range of medicaments in virtually any human or veterinary context calling for the injection of the subcutaneous, intramuscular, or intra-articular injection of medicament.

Claims (26)

1. A device for injecting a viscous medicament comprising a needle suitable for injecting the medicament, wherein the gauge of the needle is equal to or greater than about 21 gauge and the device is configured to drive the viscous medicament through the needle with sufficient force to cause injection of the medicament.
2. The device of claim 1, further comprising a pressurized gas source, an actuator, a driver, and a dispenser, wherein the pressurized gas source, the driver, and the dispenser are configured to inject the viscous medicament through the needle upon triggering the actuator.
3. The device of claim 1, wherein the viscous medicament has a viscosity greater than about 5 poise.
4. The device of claim 1, wherein the viscous medicament has a viscosity greater than about 10 poise.
5. The device of claim 1, wherein the viscous medicament has a viscosity greater than about 50 poise.
6. The device of claim 1, wherein the viscous medicament has a viscosity greater than about 100 poise.
7. The device of claim 2, wherein the driver comprises a multistage piston configured to exert at least a first force and a second force against the dispenser.
8. The device of claim 2, wherein the driver comprises a multistage piston configured to exert a first force and a second force against the dispenser, the second force being greater than the first force.
9. The device of claim 8, wherein the multistage piston is configured such that the first force is less than or equal to about 7 lbs and the second force is sufficient to inject the viscous medicament through the needle.
10. The device of claim 1, wherein the gauge of the needle ranges from about 27 gauge to about 31 gauge.
11. The device of claim 1, wherein the device is configured to inject up to about 0.5 cc of the viscous medicament through the needle within about 10 seconds.
12. The device of claim 1, wherein the device is configured to inject up to about 0.5 cc of the viscous medicament through the needle within about 5 seconds.
13. The device of claim 2, wherein the dispenser comprises a reservoir and the needle and the pressurized gas source, multistage piston, and dispenser are configured to inject up to about 0.5 cc of the viscous medicament through the needle within about 10 seconds
14. The device of claim 13, wherein the pressurized gas source, multistage piston, and dispenser are configured to expel up to about 0.5 cc of the viscous medicament through the needle within about 5 seconds.
15. A method for injecting a viscous medicament, the method comprising:
providing a viscous medicament;
providing a needle for injecting the viscous medicament, the needle having a needle gauge that is equal to or greater than about 21 gauge; and injecting the viscous medicament through the needle.
16. The method according to claim 15, wherein providing the viscous medicament comprises providing a medicament exhibiting a viscosity equal to or greater than about 5 poise.
17. The method according to claim 15, wherein providing the viscous medicament comprises providing a medicament exhibiting a viscosity equal to or greater than about 10 poise.
18. The method according to claim 15, wherein providing the viscous medicament comprises providing a medicament exhibiting a viscosity equal to or greater than about 50 poise.
19. The method according to claim 15, wherein providing the viscous medicament comprises providing a medicament exhibiting a viscosity equal to or greater than about 100 poise.
20. The method according to claim 15, wherein providing the needle comprises providing a needle having a needle gauge equal to or greater than about 27 gauge.
21. The method according to claim 15, wherein providing the needle comprises providing a needle having a needle gauge equal to about 31 gauge.
22. A device for injecting a medicament comprising:
a trigger;
a dispenser comprising a reservoir containing the medicament and a needle for injecting the medicament; and a driver comprising a multistage piston, the device for injecting the medicament being configured such that, upon actuation of the trigger, the multistage piston exerts at least a first force and a second force against the dispenser.
23. The device of claim 22, further comprising a pressurized gas source and wherein the device is configured such that actuation of the trigger causes pressurized gas from the pressurized gas source to act against the multistage piston.
24. The device of claim 22, wherein the multistage piston of the device is configured to exert a first force that is less than a second force.
25. The device of claim 24, wherein the multistage piston of the device is configured such that the first force is exerted prior to exertion of the second force.
26. The device of claim 22, wherein each stage of the multistage piston is characterized by a different surface area.
CA2465502A 2001-11-09 2002-11-08 Pneumatic powered autoinjector Expired - Fee Related CA2465502C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US33775301P 2001-11-09 2001-11-09
US60/337,753 2001-11-09
PCT/US2002/035978 WO2003039634A1 (en) 2001-11-09 2002-11-08 Pneumatic powered autoinjector

Publications (2)

Publication Number Publication Date
CA2465502A1 true CA2465502A1 (en) 2003-05-15
CA2465502C CA2465502C (en) 2011-03-22

Family

ID=23321842

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2465502A Expired - Fee Related CA2465502C (en) 2001-11-09 2002-11-08 Pneumatic powered autoinjector

Country Status (24)

Country Link
US (1) US7654983B2 (en)
EP (2) EP1441787B2 (en)
JP (1) JP4771508B2 (en)
KR (1) KR100900158B1 (en)
CN (1) CN1315544C (en)
AR (1) AR037305A1 (en)
AT (1) ATE473023T1 (en)
AU (1) AU2002363335B2 (en)
BR (1) BR0214026A (en)
CA (1) CA2465502C (en)
DE (1) DE60236949D1 (en)
DK (1) DK2221076T3 (en)
ES (2) ES2408971T3 (en)
HK (1) HK1147449A1 (en)
HU (1) HU226575B1 (en)
IL (2) IL161301A0 (en)
MX (1) MXPA04004462A (en)
NO (1) NO332994B1 (en)
NZ (1) NZ532147A (en)
PT (2) PT1441787E (en)
SI (1) SI2221076T1 (en)
TW (2) TWI224517B (en)
WO (1) WO2003039634A1 (en)
ZA (1) ZA200404551B (en)

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