Experimental Study of Sensing Technique for Blood Viscosity by Laser-induced Capillary Wave - 2nd Report, Application to Human Blood

摘要

We have developed an experimental apparatus for measurement of blood viscosity based on the laser-induced capillary wave method by using pulsed YAG laser (wavelength 1064 nm, pulse width 6 ns, power ～200mJ) as a heating light source. This method has the characteristics to measure blood viscosity, at high speed (～1ms) and in small sample volume (μl-order). In the present study, we showed the reliability of the present experimental apparatus by measuring viscosity and surface tension of pure liquid, such as toluene, acetone and water. We measured the time dependence of viscosity and surface tension of human blood over 100 min. at 35.5±0.3°C.