A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
73/132, 340/140,
A61B 5/02 (2006.01)
Patent
CA 1240765
METHOD AND APPARATUS FOR MONITORING PERIPHERAL BLOOD FLOW ABSTRACT OF THIS DISCLOSURE A heat exchanger (31) cools at a programmed rate a prede- termined area of skin. The rate at which the area of skin changes in response to temperature change of the heat exchanger and the rate the skin temperature returns to normal are then measured and compared to standard rates over a number of cycles. Impaired peripheral blood flow is evident espe- cially on subsequent cycles as vascular disease slows the rate of return to normal temperature of the skin. The heat exchanger has a cooling chamber (110) with one side of the chamber being a cooling surface (111) adjacent the skin. An injector (130) is connected to a source of fluid (75) having a boiling point at ambient pressure less than the temperature to which the skin is to be cooled. The injector injects fluid into the chamber and onto the side of the cooling surface opposite the skin to boil the fluid on the surface to cool the surface and the skin.
450474
Hemodynamics Technology Inc.
Smart & Biggar
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