STRAIN GAUGE AND PHOTO PLETHYSMOGRAPH; 100V - A mains powered plethysmograph instrument. The user can select between strain gauge and photo plethysmography modes. An analog meter on the front of the instrument indicates the signal level and is calibrated in % Volume Change for strain gauge applications. The plethysmograph signal is also available via analog and digital outputs, to a separate recording device.
A graphic recorder designed for determining and registering volume variations in the extremities (legs/toes and/or arms/fingers) as modified by the circulation of blood through them. It typically consists of flow and/or volume sensors and transducers attached to an electronic unit, which processes the data and displays the results. It may operate using one of several methods including venous occlusion (pneumatic), photoelectric, electrical impedance, or strain gauge. The device is typically used in peripheral vascular diagnostic investigations [e.g., for deep vein thrombosis (DVT) or arterial occlusive disease].
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