Surgery – Truss – Pad
Patent
1992-12-02
1994-04-26
Kamm, William E.
Surgery
Truss
Pad
310313B, A61B 812
Patent
active
053057589
ABSTRACT:
The present invention provides an apparatus that is useful in obtaining blood flow information. The device includes a carrier that, in preferred embodiments of the invention, includes either a catheter or guide wire. The device further includes at least one transducer that is capable of generating and/or receiving an ultrasonic signal that departs or is received, respectively, by the transducer at an angle to the surface of the transducer that is exposed to the blood flow. One embodiment of the apparatus employs a transducer that is capable of generating a surface acoustic wave (SAW) that, upon contact with blood, is converted into a "leaky" wave. Another embodiment of the device employs a transducer that utilizes the grating lobe effect to transmit and/or receive ultrasonic signals at an angle to the surface of the transducer that is exposed to the blood flow.
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Busse Lawrence J.
Dietz Dennis R.
Kamm William E.
Manuel George
Tetrad Corporation
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