Implantable measuring probe for measuring the flow velocity of b

Details Implantable measuring probe for measuring the flow velocity of b Implantable measuring probe for measuring the flow velocity of b

1994-06-13

1996-06-04

Jaworski, Francis

Surgery

Truss

Pad

A61B 812

Patent

active

055223940

ABSTRACT:
An implantable measuring probe, preferably an ultrasonic probe, for measuring the flow velocity of blood in natural blood vessels or replacement blood vessels of humans and animals. The measuring probe is provided with a rod-shaped probe head arranged at the end of a probe cable and in which a sensor, preferably a piezoelectric crystal, is inserted, and with a device for holding the probe head on the blood vessel. The irradiating and receiving surface of the sensor has an elongate shape, its longitudinal extension being at least as large as the inner diameter of the blood vessel in which the measurement is to be carried out. This surface extends with its longitudinal extension substantially parallel to the longitudinal axis of the rod-shaped probe head. Furthermore, this surface is orientated in such a manner to the holding device that it extends in the case of the probe head secured to the vessel with its longitudinal extension approximately perpendicular to the blood flow direction in the vessel.

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Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, vol. 11, No. 4/6, Nov. 9, 1989, Seattle, pp. 1106-1107, "Implantable doppler ultrasonic vessel patency monitor."
"A Removable Extraluminal Doppler Probe for Continuous Monitoring of Changes in Cardiac Output," Doppler Monitoring of Cardiac Output--vol. 2, Aug., 1983, pp. 357-362.
"Doppler Ultrasound in the Diagnosis of Vascular Occlusion in Renal Transplantation," Transplantation, vol. 33, No. 5, 1982, pp. 547-551.

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