Noninvasive pulse transducer for simultaneously measuring pulse

Details Noninvasive pulse transducer for simultaneously measuring pulse Noninvasive pulse transducer for simultaneously measuring pulse

1994-03-11

1996-04-02

Sykes, Angela D.

Surgery

Truss

Pad

128690, A61B 502, A61B 806

Patent

active

055031560

ABSTRACT:
A pulse transducer is disclosed having a pressure sensor for detecting pulse pressure and a velocity sensor for simultaneously detecting pulse velocity in blood vessels. The present invention allows reproduction of pulse pressure and velocity waveforms. The present invention combines a conventional applanation tonometer with a mounted velocity sensor, such as a Doppler crystal. The velocity sensor is placed proximate to the pressure sensor to allow simultaneous detection of pulse velocity, in real time, at substantially the same location as the pulse pressure measurement. The sensing direction of the velocity sensor may be at an angle with respect to the sensing direction of the pressure sensor. The present invention may be applied vertically to a vessel for proper applanation, while ultrasound, traveling across the vessel, may be used to detect a major component of the velocity. The present invention further contemplates a method of simultaneously measuring pulse velocity and pressure with a pulse transducer.

REFERENCES:
patent: 4450843 (1984-05-01), Barney et al.
Eckerle, J. S., Tonometry, Arterial, Encyclopedia of Medical Devices and Instrumentation, vol. 4: 2270-2276 (1988).
Lee, Bok Y., Peripheral Vascular Noninvasive Measurements, Encyclopedia of Medical Devices and Instrumentation, vol. 4: 2220-2238 (1988).
O'Rourke, Michael F., Kelly, Raymond, and Avolio, Alberto, The Arterial Pulse, Lea & Febiger, Chpt. 3; pp. 35-37; p. 202; Chpt. 13; Chpt. 14 (1992).
Nichols, Wilmer W. and O'Rourke, Michael F., McDonald's Blood Flow in Arteries, Theoretical, Experimental and Clinical Principles, pp. 159-162, 216-250, 405-408, 430-431, (3rd Ed. 1990).

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