Blood Flow Measuring Method.
Patent,Filed 15 Dec 83, patented 11 Nov 86
DEPARTMENT OF THE ARMY WASHINGTON DC
Pagination or Media Count:
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 mlmin or in some suitable parameter.
- Medical Facilities, Equipment and Supplies