Device for determining the patentcy of a blood vessel

Details Device for determining the patentcy of a blood vessel Device for determining the patentcy of a blood vessel

1977-12-27

1980-02-26

Stouffer, Richard T.

Surgery

Truss

Pad

128672, A61B 502

Patent

active

041900570

ABSTRACT:
An implanted device for determining the patentcy of a transplanted vein directly connecting the aorta to transfer blood to a coronary artery has a physiologically inert bulb of flexible material disposed and retained in pressure transferring relationship to the distal region of the transplanted vein. A cuff or non-expansible sleeve surrounds the bulb and the vein and is held in position. The bulb has a single opening leading into one end of an implanted catheter. The other end of the catheter opens through a single opening in a thick-walled reservoir implanted in a subcutaneous location convenient for piercing by a hypodermic needle. At least a part of the reservoir wall is able to close upon withdrawal of the needle. The bulb, catheter and reservoir are completely filled, without distention, by an appropriate, usually isotonic, liquid. There may be a break-away connection in the catheter and various radio-opaque indicia for X-ray monitoring.

REFERENCES:
patent: 598343 (1898-02-01), Hill et al.
patent: 3124132 (1964-03-01), Sullivan et al.
patent: 3240207 (1966-03-01), Barker et al.
patent: 3310051 (1967-03-01), Schulte
patent: 3585987 (1971-06-01), Svensson
patent: 3610228 (1971-10-01), Temkin
patent: 3625199 (1971-12-01), Summers
patent: 4006735 (1977-02-01), Hittman et al.
patent: 4011861 (1977-03-01), Enger
"A Nuclear Intracranial Pressure Sensor", IEEE Trans. on Nuclear Science, vol. 21, No. 1, Feb. 1974, pp. 697-701.

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