WO1999020327A3 - Spring-actuated infusion syringe - Google Patents

Spring-actuated infusion syringe Download PDF

Info

Publication number
WO1999020327A3
WO1999020327A3 PCT/US1998/022083 US9822083W WO9920327A3 WO 1999020327 A3 WO1999020327 A3 WO 1999020327A3 US 9822083 W US9822083 W US 9822083W WO 9920327 A3 WO9920327 A3 WO 9920327A3
Authority
WO
WIPO (PCT)
Prior art keywords
barrel
housing
piston
distal end
proximal end
Prior art date
Application number
PCT/US1998/022083
Other languages
French (fr)
Other versions
WO1999020327A2 (en
Inventor
Charles J Mcphee
Original Assignee
I Flow Corp
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
Application filed by I Flow Corp filed Critical I Flow Corp
Priority to AU98095/98A priority Critical patent/AU9809598A/en
Publication of WO1999020327A2 publication Critical patent/WO1999020327A2/en
Publication of WO1999020327A3 publication Critical patent/WO1999020327A3/en

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
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • 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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/1454—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons spring-actuated, e.g. by a clockwork
    • 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
    • A61M2005/3114—Filling or refilling

Abstract

A spring-actuated infusion syringe includes a housing having an open distal end, with a spring-loaded piston disposed for axial translation in the housing. The piston is biased toward the distal end of the housing. The syringe also includes a barrel for containing a liquid medicament, the barrel having a distal end having a fluid passage therethrough and an open proximal end. A plunger is disposed in the barrel for axial translation therein. The proximal end of the barrel is axially insertable into the distal end of the housing, whereby the piston enters the proximal end of the barrel and engages the plunger. In use, the barrel is filled with a medicament through the fluid flow passage, and the flow of medicament from the syringe is obstructed. The proximal end of the barrel is inserted into the distal end of the housing, whereby the piston enters the proximal end of the barrel. The plunger, immobilized by the hydrostatic pressure of the liquid in the barrel, pushes the piston proximally against its biasing force. An engagement between an annular barrel flange and an internal housing thread retains the barrel at the desired axial position within the housing. To deliver the liquid from the syringe, the obstruction is removed. The hydrostatic pressure in the barrel being relieved, the biasing force of the piston pushes the plunger distally into the barrel, displacing the liquid therefrom through the fluid flow passage.
PCT/US1998/022083 1997-10-21 1998-10-19 Spring-actuated infusion syringe WO1999020327A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU98095/98A AU9809598A (en) 1997-10-21 1998-10-19 Spring-actuated infusion syringe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/957,970 1997-10-21
US08/957,970 US6019747A (en) 1997-10-21 1997-10-21 Spring-actuated infusion syringe

Publications (2)

Publication Number Publication Date
WO1999020327A2 WO1999020327A2 (en) 1999-04-29
WO1999020327A3 true WO1999020327A3 (en) 1999-07-01

Family

ID=25500426

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/022083 WO1999020327A2 (en) 1997-10-21 1998-10-19 Spring-actuated infusion syringe

Country Status (3)

Country Link
US (1) US6019747A (en)
AU (1) AU9809598A (en)
WO (1) WO1999020327A2 (en)

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Also Published As

Publication number Publication date
US6019747A (en) 2000-02-01
WO1999020327A2 (en) 1999-04-29
AU9809598A (en) 1999-05-10

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