The PPG100C Pulse Plethysmogram Amplifier records the pulse pressure wave and provides an indication of blood pressure, blood density or vasoconstriction. Front panel controls allow selection of either absolute or relative plethysmographic measurements.
The PPG100C couples to a pulse plethysmogram (PPG) transducer (TSD200 or TSD200C*) to record the blood volume pulse waveform via optical (photoplethysmogram) methods. The TSD200 consists of a matched infrared emitter and photo diode detector, which transmits changes in infrared reflectance resulting from varying blood flow. Blood is highly reflective of near infrared light wavelengths, due to the heme subunit of hemoglobin. When the PPG transducer is placed on the skin, in proximity to capillaries, the reflectance of the infrared light from the emitter to the detector will change in accordance to capillary blood volume. The PPG waveform peaks when capillary blood volume is maximized.
Each PPG100C requires one pulse plethysmogram transducer:
TSD200 with Velcro for easy attachment to finger OR
TSD200C with ear clip
See also:
TCIPPG1 Interface for Geer photo-electric (IR)
* The older model TSD200B with adhesive collars is no longer sold but works with the PPG100.
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