Accession Number : ADD012605
Title : Blood Flow Measuring Method.
Descriptive Note : Patent,Filed 15 Dec 83, patented 11 Nov 86
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC
Personal Author(s) : Bryant,Gordon H
Report Date : 11 Nov 1986
Pagination or Media Count : 4
Abstract : An illustrative embodiment of the invention measures blood flow through a vein or an artery. A balloon catheter is inserted into the vessel and is inflated until the balloon temporarily stops blood flow in order to measure the diameter of the vessel. The balloon is deflated a bit to reetablish flow through the vessel in the annulus that is formed between the outer surface of the balloon and the adjacent surface of the vessel. Apertures in the catheter on opposite ends of the balloon establish fluid communication with the blood to permit the change in blood pressure to be measured as it flows through the annulus in order to derive the blood flow in milliliters per minute (ml/min) or in some suitable parameter.
Descriptors : *PATENTS, *CATHETERS, *BLOOD CIRCULATION, *MEASURING INSTRUMENTS, SURFACES, BALLOONS, BLOOD PRESSURE, FLUIDS, EXTERNAL, BLOOD, MEASUREMENT, INVENTIONS, VEINS, ARTERIES, APERTURES
Subject Categories : Medical Facilities, Equipment and Supplies
Distribution Statement : APPROVED FOR PUBLIC RELEASE