Winsor, Travis
February 1957
Angiology;Feb1957, Vol. 8 Issue 1, p87
Academic Journal
An electronic segmental pneumoplethysmograph for recording the volume changes of the extremities has been described. It is a standardized volume recorder which roads in terms of cubic centimeters of volume change per pulse beat. The instrument was developed to eliminate many of the errors inherent in oscillometry. Factors which introduce errors into conventional oscillometry such as the volume of air in the cuff, tightness of the cuff, and aging of the rubber in the pneumatic system) have been overcome by an accurate standardization and gain control. The segmental pneumoplethysmograph may be utilized with commonly employed recording instruments such as electrocardiographic machines and other instruments. The instrument has high sensitivity and may be employed for measuring volume changes of a segment of a limb or a digit.


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