The SS4A pulse plethysmogram (PPG) transducer operates with the TEL100C Telemetry System to record the blood volume pulse waveform via optical (photoplethysmogram) methods.
The SS4A 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.
Connect this transducer to a single TEL100C input channel to record a pulse pressure waveform. Attach it to a finger with the Velcro strap or tape it to other body locations. The ergonomic housing improves contact with the subject and reduces movement artifact.
See TSD200 for the MP150 or MP100 System equivalent.
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