FR2225060A5 - Transmission colorimetry inside the heart or blood vessels - uses catheter to carry light to internal detector - Google Patents

Transmission colorimetry inside the heart or blood vessels - uses catheter to carry light to internal detector

Info

Publication number
FR2225060A5
FR2225060A5 FR7312535A FR7312535A FR2225060A5 FR 2225060 A5 FR2225060 A5 FR 2225060A5 FR 7312535 A FR7312535 A FR 7312535A FR 7312535 A FR7312535 A FR 7312535A FR 2225060 A5 FR2225060 A5 FR 2225060A5
Authority
FR
France
Prior art keywords
catheter
heart
chamber
blood vessels
blood
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.)
Expired
Application number
FR7312535A
Other languages
French (fr)
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.)
Thomson Medical Telco SA
Original Assignee
Thomson Medical Telco SA
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 Thomson Medical Telco SA filed Critical Thomson Medical Telco SA
Priority to FR7312535A priority Critical patent/FR2225060A5/en
Application granted granted Critical
Publication of FR2225060A5 publication Critical patent/FR2225060A5/en
Expired 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
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/1459—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters invasive, e.g. introduced into the body by a catheter
    • 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
    • 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
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0233—Special features of optical sensors or probes classified in A61B5/00
    • A61B2562/0238—Optical sensor arrangements for performing transmission measurements on body tissue

Abstract

An in vitro catheter for transmission colorimetry of blood has two channels. One is used for perfusion of chemicals into the blood stream and exits at the side of the head. The second channel carries a bunch of optical fibres up which light from an external source is passed to the walls of a rigid transparent chamber. The other side of the chamber has a micro-miniature phototransistor built in, and its output leads pass back down the second channel to the outside of the body. Blood flows freely into the chamber through side windows which lie between the perfusion exit and the tip of the catheter. The system permits the use of very bright external lights such as lasers and of the desired wavelength.
FR7312535A 1973-04-06 1973-04-06 Transmission colorimetry inside the heart or blood vessels - uses catheter to carry light to internal detector Expired FR2225060A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7312535A FR2225060A5 (en) 1973-04-06 1973-04-06 Transmission colorimetry inside the heart or blood vessels - uses catheter to carry light to internal detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7312535A FR2225060A5 (en) 1973-04-06 1973-04-06 Transmission colorimetry inside the heart or blood vessels - uses catheter to carry light to internal detector

Publications (1)

Publication Number Publication Date
FR2225060A5 true FR2225060A5 (en) 1974-10-31

Family

ID=9117562

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7312535A Expired FR2225060A5 (en) 1973-04-06 1973-04-06 Transmission colorimetry inside the heart or blood vessels - uses catheter to carry light to internal detector

Country Status (1)

Country Link
FR (1) FR2225060A5 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132344A2 (en) * 1983-07-20 1985-01-30 Purdue Research Foundation Improved catheter based cardiac output sensor
EP0249822A1 (en) * 1986-06-16 1987-12-23 Siemens Aktiengesellschaft Frequency-controlled cardiac stimulator
EP0484547A1 (en) * 1990-05-18 1992-05-13 IWASAKI, Hitoshi Catheter for measurement and method of measuring oxygen saturation degree or flow speed of blood

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132344A2 (en) * 1983-07-20 1985-01-30 Purdue Research Foundation Improved catheter based cardiac output sensor
EP0132344A3 (en) * 1983-07-20 1986-01-22 Purdue Research Foundation Improved catheter based cardiac output sensor
EP0249822A1 (en) * 1986-06-16 1987-12-23 Siemens Aktiengesellschaft Frequency-controlled cardiac stimulator
EP0484547A1 (en) * 1990-05-18 1992-05-13 IWASAKI, Hitoshi Catheter for measurement and method of measuring oxygen saturation degree or flow speed of blood
EP0484547A4 (en) * 1990-05-18 1992-07-08 Mitsubishi Rayon Co., Ltd. Catheter for measurement and method of measuring oxygen saturation degree or flow speed of blood

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Legal Events

Date Code Title Description
ST Notification of lapse