Effects of 2450 MHz Microwave Radiation on Human Blood Coagulation Processes

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Abstract
A relatively inexpensive and compact free-space microwave exposure system was designed and fabricated for irradiating in vitro platelet-rich human blood plasma to 2450 MHz CW radiation at varying power densities of up to 280 mW/cm2 and 75 mW of absorbed power. Investigation of the non-thermal effects, with temperatures remaining below normal body temperature of 37°C, shows that no significant changes occur to platelet count, coagulation time or clot strength at power densities up to 280 mW/cm2 for exposure times as high as 24 hr. Microwave heating to temperatures between 37 and 42 °Q produced little significant change in coagulation time and clot strength, whereas conventional heating to equivalent temperatures produced an expected and observed increase in coagulation time and corresponding decrease in clot strength.

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