CA2161222A1 - Ambulatory infusion pump - Google Patents

Ambulatory infusion pump

Info

Publication number
CA2161222A1
CA2161222A1 CA2161222A CA2161222A CA2161222A1 CA 2161222 A1 CA2161222 A1 CA 2161222A1 CA 2161222 A CA2161222 A CA 2161222A CA 2161222 A CA2161222 A CA 2161222A CA 2161222 A1 CA2161222 A1 CA 2161222A1
Authority
CA
Canada
Prior art keywords
drive shaft
pump
magnet
electric motor
pump chamber
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
CA2161222A
Other languages
French (fr)
Other versions
CA2161222C (en
Inventor
Robert L. Anderson
Jeffrey P. Castleberry
Steve W. Stracener
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.)
Baxter International Inc
Original Assignee
Robert L. Anderson
Jeffrey P. Castleberry
Steve W. Stracener
Baxter International Inc.
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 Robert L. Anderson, Jeffrey P. Castleberry, Steve W. Stracener, Baxter International Inc. filed Critical Robert L. Anderson
Publication of CA2161222A1 publication Critical patent/CA2161222A1/en
Application granted granted Critical
Publication of CA2161222C publication Critical patent/CA2161222C/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
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • A61M5/16854—Monitoring, detecting, signalling or eliminating infusion flow anomalies by monitoring line pressure
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
    • A61M39/281—Automatic tube cut-off devices, e.g. squeezing tube on detection of air
    • 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
    • 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
    • A61M2005/1401—Functional features
    • A61M2005/1404—Keep vein-open rate [KVO], i.e. low flow rate

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Pulmonology (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A medical infusion pump (10) including an improved electric motor assembly (256). The medical infusion pump (10) includes a pumping mechanism (250) and a pump chamber (132) in an operative position with respect to the pumping mechanism (250), the pumping mechanism (250), manipulating the pump chamber (132) to pump liquid through the pump chamber. An electric motor (256) having a rotatable drive shaft (316) is operably linked to the pump driving mechanism (250), and the pump driving mechanism (250) pumps a select amount of liquid through the pump chamber (132) on each rotation of the electric motor drive shaft (316). The improved electric motor assembly (256) includes a motor having a portion of a drive shaft (388) extending therefrom. A magnet (392) is attached to the extending portion of the drive shaft for rotation with the drive shaft. A flux gatherer (396) is spaced from and magnetically coupled to the magnet (392) for biasing the poles of the magnet in a select orientation relative to the flux gatherer (396) so as to stop the pump driving mechanism (250) in a select position. A magnetic position detector (400) is spaced from and magnetically coupled to the magnet (392) for emitting an electrical signal each rotation of the drive shaft (388).
CA002161222A 1994-03-09 1995-03-02 Ambulatory infusion pump Expired - Fee Related CA2161222C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/208,343 US5482438A (en) 1994-03-09 1994-03-09 Magnetic detent and position detector for fluid pump motor
US08/208,343 1994-03-09
PCT/US1995/002545 WO1995024229A2 (en) 1994-03-09 1995-03-02 Ambulatory infusion pump

Publications (2)

Publication Number Publication Date
CA2161222A1 true CA2161222A1 (en) 1995-09-14
CA2161222C CA2161222C (en) 2001-02-13

Family

ID=22774239

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002161222A Expired - Fee Related CA2161222C (en) 1994-03-09 1995-03-02 Ambulatory infusion pump

Country Status (6)

Country Link
US (1) US5482438A (en)
EP (1) EP0697898B1 (en)
JP (1) JP3525297B2 (en)
CA (1) CA2161222C (en)
DE (1) DE69522057T2 (en)
WO (1) WO1995024229A2 (en)

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Also Published As

Publication number Publication date
DE69522057D1 (en) 2001-09-13
EP0697898A1 (en) 1996-02-28
CA2161222C (en) 2001-02-13
US5482438A (en) 1996-01-09
WO1995024229A3 (en) 1995-10-26
WO1995024229A2 (en) 1995-09-14
EP0697898B1 (en) 2001-08-08
EP0697898A4 (en) 1997-04-02
JPH08509898A (en) 1996-10-22
JP3525297B2 (en) 2004-05-10
DE69522057T2 (en) 2002-04-25

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