[Chronic blood pressure measurements in the rabbit aorta using a novel implantable pressure transducer]

A novel implantable pressure pickup is described for chronical blood pressure measurement at the rabbit aorta, which transmits the intravasal pressure via a short liquid column in a closed foil catheter transmurally to an extravasal pressure transducer. With a natural frequency of 250 Hz, the pressure slope steepness is 1834 kPa/sec. The pickups operate up to 40 kPa linearly with deviation of 2% of the whole scale. The pressure hysteresis is at 3% of the whole scale, the temperature coefficient at 93 Pa/degrees C. The pickups are well tolerated by the tissue; their manufacture is relatively simple, and they are much cheaper than the intravasal pressure transducers.