Biomedical Engineering Reference
In-Depth Information
rate in the skin, digital arterial blood pressure, and skin sympathetic nerve
activity (SSNA). The measurement of SSNA was carried out from the me-
dian nerve by means of microneurography [183]. Details of the technique of
microneurography will be presented in another section. Skin blood flow was
measured using a laser Doppler blood flowmeter in the regions innervated by
the nerve from which SSNA activity was recorded. The blood pressure of a
digital artery was measured by a noninvasive continuous monitoring system
for arterial blood pressure.
SSNA and other physiological parameters were measured using the above-
mentioned system when the subjects were sitting in a fairly relaxed manner
and when they were exposed to a series of mental or physical stresses (electri-
cal stimulations, unpleasant white noise, and the sound of a firing revolver)
and recorded using a data recorder.
The Development of a Program for Controlling the Driving Para-
meters of an Artificial Heart System and the Results of the Control.
From the changes with respect to time in the above-mentioned measured pa-
rameters, the lapses between the time when a stimulus was given to the sub-
Fig. 4.51.
The experimental arrangement
