Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-09-16
1996-11-19
McDermott, Corrine M.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604247, 137539, 2511496, A61M 3100
Patent
active
055757677
ABSTRACT:
A method and apparatus is provided for high pressure one-way fluid valving in angiography. The method includes inhibiting the flow of a sterile saline solution through a catheter lumen using the pressure of an opaque dye injected therethrough. A one-way fluid valve connects a pressurized source of saline solution to an inlet fitting of a catheter Y adapter. A second inlet fitting of the Y adapter is connected to a high pressure opaque media source through a gate valve. The one-way fluid valve is sensitive to a pressure differential thereacross to selectively open and close in response to the pressure within the catheter lumen versus the pressure of the saline solution. The one-way fluid valve includes a stainless steel check ball, a stainless steel biasing spring and double sealing O-ring adapted for radial compression by the stainless steel biasing spring and the pressure differential across the valve. The biasing spring has a spring constant commensurate with the saline solution pressure in order to open substantially immediately after the opaque media injection terminates. A female end of the valve includes a 360.degree. luer fitting or hub for structural integrity and the male end of the valve includes a threaded cap member adapted to receive and engage a female 360.degree. luer fitting. Unthreading the cap member from the valve separates the female 360.degree. luer fitting from the tapered male surface of the valve.
REFERENCES:
patent: 3503385 (1970-03-01), Stevens
patent: 3570484 (1971-03-01), Steer
patent: 4681559 (1987-07-01), Hooven
patent: 5041087 (1991-08-01), Loo et al.
patent: 5401255 (1995-03-01), Sutherland et al.
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