Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1992-01-10
1993-07-13
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604167, 604256, A61M 1100
Patent
active
052268799
ABSTRACT:
An infusion device which permits transcutaneous access to an implanted catheter for use in introducing an external filament such as a optical fiber, external catheter, guide wire or rigid needle. In accordance with this invention the device includes a valve assembly including a first valve element defining an aperture with a sealing member which is normally to engage and seal against the aperture. The sealing element is made from a hard material such as a metal. Upon introduction of a rigid external introducer such as a needle, the needle directly contacts the sealing member plug unsealing it from the valve element aperture which then closes against the external element. The device enables repeated access using a sharp introduced element such as a needle without it contacting soft sealing elements which could be degraded by such repeated access.
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Rational Drug Therapy, May, 1988, vol. 22, No. 5, William D. Ensminger M.D. and Ira S. Wollner, M.D.
Andrews James C.
Ensminger William D.
Knol James A.
Mastroeni John J.
Andrews James C.
Ensminger William D.
Knol James A.
Yasko John D.
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