Height Correction Unit: enables arm movements
All Finapres ® devices include a Height Correction Unit (HCU) to enable arm movements during measurements, for example during Head-Up Tilt (HUT) tests and Active Stand tests .
The HCU compensates for vertical movement of the hand relative to heart level and the concomitant pressure changes in the finger blood pressure.
The HCU consists of a liquid filled tube connected at one end to a pressure transducer. The reference ending is placed at the patients arm at heart level, while the other end is fixed to a finger cuff. The height signal is continuously recorded during measurements for monitoring and review purposes.
Using the HCU during measurements is highly recommended. In case no HCU is connected, the cuffed finger must remain at heart level during the whole measurement!
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