Apparatus for the cannulation of blood vessels

Details Apparatus for the cannulation of blood vessels Apparatus for the cannulation of blood vessels

1991-12-23

1993-11-09

Jaworski, Francis

Surgery

Truss

Pad

12866205, A61B 1206

Patent

active

052593851

ABSTRACT:
An apparatus for use in cannulation of blood vessels which includes an ultrasonic flow sensing assembly. The assembly includes inner and outer elongated electrically conducting tubular members which are separated by an electrical insulator. A piezoelectric transducer capable of generating and receiving ultrasonic waves is located at the distal ends of the tubular members and is electrically connected to them. A power source is applied to the tubular members and to the piezoelectric transducer such that when a hollow needle containing the ultrasonic flow sensing assembly is advanced through tissue, emitted and detected ultrasonic waves can be employed to locate body vessels which can then be penetrated by the sharpened end of the hollow needle.

REFERENCES:
patent: 4354500 (1982-10-01), Colley et al.
patent: 4582067 (1986-04-01), Silverstein et al.
patent: 4665925 (1987-05-01), Millar
patent: 4887606 (1989-12-01), Yock et al.
patent: 4991588 (1991-02-01), Pfleuger et al.
patent: 5070882 (1991-12-01), Bui et al.
patent: 5109861 (1992-05-01), Walinsky et al.

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