The Resistivity of the Live Human Skull - The Effect of Variation in Volume of Immersion Fluid

In the present study, the influence of the variation of immersion fluid volume (or air-drying time) on skull resistivity was studied. The results showed that the skull resistivity increased significantly with the increasing of air-drying time. For air-drying time of 10 min, the skull resistivity increased approximately 2 times, and for 30 min and 60 min, the skull resistivity increased significantly about 7 times and 19 times. This study suggests that we should pay more attention to the humidity of experimental environment to keep the natural immersion fluid from volatilizing in the measurement on skull resistivity. Preserving the freshly excised skull samples in gauze soaked with physiological saline can effectively keep the immersion fluid and maintain the natural physiological status.