CA2129551A1 - A thermodilution catheter having a safe, flexible heating element - Google Patents

A thermodilution catheter having a safe, flexible heating element

Info

Publication number
CA2129551A1
CA2129551A1 CA002129551A CA2129551A CA2129551A1 CA 2129551 A1 CA2129551 A1 CA 2129551A1 CA 002129551 A CA002129551 A CA 002129551A CA 2129551 A CA2129551 A CA 2129551A CA 2129551 A1 CA2129551 A1 CA 2129551A1
Authority
CA
Canada
Prior art keywords
heating filament
blood
filament
catheter
heating
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
CA002129551A
Other languages
French (fr)
Other versions
CA2129551C (en
Inventor
Michael D. Quinn
Mark L. Yelderman
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.)
Edwards Lifesciences Corp
Original Assignee
Michael D. Quinn
Mark L. Yelderman
Interflo Medical, Inc.
Baxter Healthcare Corporation
Baxter International Inc.
Edwards Lifesciences Corporation
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
Priority to PCT/US1992/001012 priority Critical patent/WO1993015652A1/en
Priority to EP92915443A priority patent/EP0637219B1/en
Priority to JP51400493A priority patent/JP3150151B2/en
Priority to DE69227526T priority patent/DE69227526T2/en
Priority to CA002129551A priority patent/CA2129551C/en
Application filed by Michael D. Quinn, Mark L. Yelderman, Interflo Medical, Inc., Baxter Healthcare Corporation, Baxter International Inc., Edwards Lifesciences Corporation filed Critical Michael D. Quinn
Priority to AU23339/92A priority patent/AU2333992A/en
Priority claimed from PCT/US1992/001012 external-priority patent/WO1993015652A1/en
Publication of CA2129551A1 publication Critical patent/CA2129551A1/en
Application granted granted Critical
Publication of CA2129551C publication Critical patent/CA2129551C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
    • A61B5/6852—Catheters
    • A61B5/6855—Catheters with a distal curved tip
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/026—Measuring blood flow
    • A61B5/0275—Measuring blood flow using tracers, e.g. dye dilution
    • A61B5/028—Measuring blood flow using tracers, e.g. dye dilution by thermo-dilution
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
    • A61B5/6852—Catheters
    • A61B5/6857—Catheters with a distal pigtail shape
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/58—Heating hoses; Heating collars
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/08—Sensors provided with means for identification, e.g. barcodes or memory chips

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Hematology (AREA)
  • Cardiology (AREA)
  • Physiology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

A thermodilution catheter (100) having a heating filament (400) which is fabricated so as to be thin and flexible enough to avoid contact with the patient's blood. The heating filament is either inserted in a preformed catheter lumen, incorporated into a wall of the catheter body itself, or wrapped around the catheter body wall and surrounded by an external sheath (404). Generally, the covering of the heating filament is minimally thin so as to allow the heat from the heating filament (400) to be transferred to the surrounding blood and to minimally increase the overal cross-sectional area. Since the heating filament (400) does not directly touch the patient's blood, the outer surface may he made smooth so as to prevent inducement of blood clots. In addition, the heat-ing filament (400) maybe maintained at a safe temperature by forming the heating element of a flexible material having a high temperature coefficient of resistance, law thermal capacitance and high thermal conductivity.
CA002129551A 1992-02-07 1992-02-07 A thermodilution catheter having a safe, flexible heating element Expired - Lifetime CA2129551C (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP92915443A EP0637219B1 (en) 1992-02-07 1992-02-07 A thermodilution catheter having a safe, flexible heating element
JP51400493A JP3150151B2 (en) 1992-02-07 1992-02-07 Thermodilution catheter with a safe and flexible heating element
DE69227526T DE69227526T2 (en) 1992-02-07 1992-02-07 HEAT DILUTION CATHETER WITH BENDABLE, SAFE HEATING ELEMENT
CA002129551A CA2129551C (en) 1992-02-07 1992-02-07 A thermodilution catheter having a safe, flexible heating element
PCT/US1992/001012 WO1993015652A1 (en) 1992-02-07 1992-02-07 A thermodilution catheter having a safe, flexible heating element
AU23339/92A AU2333992A (en) 1992-02-07 1992-02-07 A thermodilution catheter having a safe, flexible heating element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA002129551A CA2129551C (en) 1992-02-07 1992-02-07 A thermodilution catheter having a safe, flexible heating element
PCT/US1992/001012 WO1993015652A1 (en) 1992-02-07 1992-02-07 A thermodilution catheter having a safe, flexible heating element

Publications (2)

Publication Number Publication Date
CA2129551A1 true CA2129551A1 (en) 1993-08-19
CA2129551C CA2129551C (en) 2001-10-02

Family

ID=4154118

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002129551A Expired - Lifetime CA2129551C (en) 1992-02-07 1992-02-07 A thermodilution catheter having a safe, flexible heating element

Country Status (1)

Country Link
CA (1) CA2129551C (en)

Also Published As

Publication number Publication date
CA2129551C (en) 2001-10-02

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