Connect public, paid and private patent data with Google Patents Public Datasets

Blood flow determination process through vessels - adds fluid altering electrical conductivity and measures conductivity using HF

Info

Publication number
DE2819128A1
DE2819128A1 DE19782819128 DE2819128A DE2819128A1 DE 2819128 A1 DE2819128 A1 DE 2819128A1 DE 19782819128 DE19782819128 DE 19782819128 DE 2819128 A DE2819128 A DE 2819128A DE 2819128 A1 DE2819128 A1 DE 2819128A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
conductivity
blood
fluid
side
altering
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.)
Withdrawn
Application number
DE19782819128
Other languages
German (de)
Inventor
Ralph-Holger Dr Raben
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.)
RABEN RALPH HOLGER DR
Original Assignee
RABEN RALPH HOLGER DR
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

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radiowaves
    • A61B5/053Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0538Measuring electrical impedance or conductance of a portion of the body invasively, e.g. using a catheter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, 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
    • A61B5/026Measuring blood flow
    • A61B5/0275Measuring blood flow using tracers, e.g. dye dilution
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radiowaves
    • A61B5/053Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0535Measuring electrical impedance or conductance of a portion of the body impedance plethysmography

Abstract

The process determines the rate of blood flow through vessels by adding a fluid altering a physical characteristic of the blood on the inlet side and measuring the time for which this characteristic lasts on the outlet side. A fluid is used altering the electrical conductivity of the blood, this conductivity being measured, and the fluid used can be a physiological solution of common salt. The duration of the conductivity characteristic can also be measured on the inlet side following the point of introduction, and compared with that on the outlet side. A high frequency measuring system can be used, at a frequency above 10 khz.
DE19782819128 1978-04-29 1978-04-29 Blood flow determination process through vessels - adds fluid altering electrical conductivity and measures conductivity using HF Withdrawn DE2819128A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782819128 DE2819128A1 (en) 1978-04-29 1978-04-29 Blood flow determination process through vessels - adds fluid altering electrical conductivity and measures conductivity using HF

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782819128 DE2819128A1 (en) 1978-04-29 1978-04-29 Blood flow determination process through vessels - adds fluid altering electrical conductivity and measures conductivity using HF

Publications (1)

Publication Number Publication Date
DE2819128A1 true true DE2819128A1 (en) 1979-11-08

Family

ID=6038457

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782819128 Withdrawn DE2819128A1 (en) 1978-04-29 1978-04-29 Blood flow determination process through vessels - adds fluid altering electrical conductivity and measures conductivity using HF

Country Status (1)

Country Link
DE (1) DE2819128A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092438A2 (en) * 1982-04-21 1983-10-26 Purdue Research Foundation Method and apparatus for measuring cardiac output
EP0094749A2 (en) * 1982-04-23 1983-11-23 American Home Products Corporation Monitoring of capillary blood flow
EP0132344A2 (en) * 1983-07-20 1985-01-30 Purdue Research Foundation Improved catheter based cardiac output sensor
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
US5184621A (en) * 1991-05-29 1993-02-09 C. R. Bard, Inc. Steerable guidewire having electrodes for measuring vessel cross-section and blood flow

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092438A2 (en) * 1982-04-21 1983-10-26 Purdue Research Foundation Method and apparatus for measuring cardiac output
EP0092438A3 (en) * 1982-04-21 1986-01-22 Purdue Research Foundation Method and apparatus for measuring cardiac output
EP0094749A2 (en) * 1982-04-23 1983-11-23 American Home Products Corporation Monitoring of capillary blood flow
EP0094749A3 (en) * 1982-04-23 1984-04-11 American Home Products Corporation Monitoring of capillary blood flow
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
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
US5184621A (en) * 1991-05-29 1993-02-09 C. R. Bard, Inc. Steerable guidewire having electrodes for measuring vessel cross-section and blood flow

Similar Documents

Publication Publication Date Title
GB1599241A (en) Control and regulation device for glycemia
GB2012373A (en) Peristaltic infusion pump and disposable casette for use therewith
GB1506555A (en) Blood reservoir
DE2639992A1 (en) Infusion pump and flow meter - has single diaphragm for pump and inlet and outlet valves
Gawne et al. Estimating left ventricular offset volume using dual-frequency conductance catheters
DE2605528A1 (en) Monitor for blood pressure over long period - with pulse amplitude measurement for blocked flow simultaneous with pressure measurement
DE2544258A1 (en) Pumping system for haemodialysis appts. - controls rate of dialysis accurately and adjustably
DE2432173A1 (en) Locating of intracorporeal catheters already in place - using impulse generator linked to skin mounted electrodes
JPS6086104A (en) Polymerization of vinyl chloride
JPS5243487A (en) Method and apparatus for artial feeding of liquid sample
JPS52146451A (en) Dipping apparatus
JPS536430A (en) Preparation of anticoagulant soft material for medical use
DE2624384A1 (en) Urea determination in blood - with continuous monitoring for patients receiving artificial kidney treatment
DE3202582A1 (en) Drip chamber for monitoring blood in an extracorporeal circulation in haemodialysis by means of an artificial kidney
FR2242994A1 (en) Blood treatment and pressure measuring equipment - with proportional anti-coagulant metering
FR2289165A1 (en) Urine vol. measurement equipment - has support for urine bag connected to measuring device
JPS6426157A (en) Method and apparatus for measuring hematocrit in whole blood
JPS5217375A (en) Membrane separating apparatus
USD243038S (en) Electronic meter for determining human pulse rate from a fingertip
JPS54153301A (en) Automatic water supply method
JPS5410387A (en) Preparation of water-soluble polymer gel
DE2741344A1 (en) Automatic control of infusion pump used in child birth - uses body parameters measured digitised and evaluated in time to vary dosage rate
GB1122526A (en) A dialysis device for purifying blood or other liquids
JPH01110218A (en) Gas flowmeter and gas flow rate controller
JPS51145474A (en) A blood dialysis membrane with outstanding dialysis performance and a process for producing it

Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee