CA2151704A1 - Medication infusion pump with improved pressure reservoir - Google Patents

Medication infusion pump with improved pressure reservoir

Info

Publication number
CA2151704A1
CA2151704A1 CA002151704A CA2151704A CA2151704A1 CA 2151704 A1 CA2151704 A1 CA 2151704A1 CA 002151704 A CA002151704 A CA 002151704A CA 2151704 A CA2151704 A CA 2151704A CA 2151704 A1 CA2151704 A1 CA 2151704A1
Authority
CA
Canada
Prior art keywords
pressure
pressure reservoir
reservoir
medication
pressure fluid
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
CA002151704A
Other languages
French (fr)
Other versions
CA2151704C (en
Inventor
Chad Srisathapat
Virote Indravudh
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.)
Medtronic Minimed Inc
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
Application filed by Individual filed Critical Individual
Publication of CA2151704A1 publication Critical patent/CA2151704A1/en
Application granted granted Critical
Publication of CA2151704C publication Critical patent/CA2151704C/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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
    • A61M5/14276—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body specially adapted for implantation

Abstract

An implantable medication infusion pump is provided of the type having a pressure reservoir with a selected pressure fluid therein for maintaining liquid medication in an adjacent medication chamber under a substantially constant pressure. The reservoir comprises a hollow structural enclosure defined by at least one movable wall and adapted to be filled with a selected quantity of the pressure fluid, particularly such as a selected fluorocarbon in a liquid-vapor state. The movable wall of the pressure reservoir is shared with and defines one side of the medication chamber, with the pressure fluid undergoing appropriate change of state to expand or contract the pressure reservoir in a manner maintaining the medication under substantially constant pressure. The improved pressure reservoir includes an internal spacer element to prevent contraction of the pressure reservoir beyond a minimum volume at least slightly greater than the liquid state volume of the pressure fluid therein.
With this construction, at least some pressure fluid within the pressure reservoir remains in a vapor state at all times.
CA002151704A 1994-06-14 1995-06-13 Medication infusion pump with improved pressure reservoir Expired - Fee Related CA2151704C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/259,440 US5514103A (en) 1994-06-14 1994-06-14 Medication infusion pump with improved pressure reservoir
US08/259,440 1994-06-14

Publications (2)

Publication Number Publication Date
CA2151704A1 true CA2151704A1 (en) 1995-12-15
CA2151704C CA2151704C (en) 2005-08-09

Family

ID=22984958

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002151704A Expired - Fee Related CA2151704C (en) 1994-06-14 1995-06-13 Medication infusion pump with improved pressure reservoir

Country Status (5)

Country Link
US (1) US5514103A (en)
EP (1) EP0687475B1 (en)
JP (1) JP3571804B2 (en)
CA (1) CA2151704C (en)
DE (1) DE69513448T2 (en)

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Also Published As

Publication number Publication date
US5514103A (en) 1996-05-07
JP3571804B2 (en) 2004-09-29
CA2151704C (en) 2005-08-09
EP0687475B1 (en) 1999-11-24
EP0687475A1 (en) 1995-12-20
DE69513448D1 (en) 1999-12-30
JPH0852222A (en) 1996-02-27
DE69513448T2 (en) 2000-05-25

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