Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1991-05-01
1993-01-12
Hirsch, Paul J.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604158, 604265, A61M 2500, A61M 500
Patent
active
051786117
ABSTRACT:
The present invention is directed to a device for reducing the risk of infection associated with the establishment and/or maintenance of intravascular fluid communication between apparatus external to the body and an internal blood vessel. The device includes a first tube capable of penetrating both the layers of skin and tissues surrounding the blood vessel and a wall of the blood vessel, the first tube having a distal end portion operatively insertable into the blood vessel and a proximal end portion operatively disposed outside the blood vessel but within the body. A second tube is disposed within the first tube, the second tube having a distal end portion insertable into the blood vessel through an opening defined at the distal end of the first tube. The first and second tubes define therebetween a longitudinally coaxially disposed channel which establishes a fluid communication path for a first fluid. The first tube has a predeterminately-sized capillary aperture defined in a distal end portion and predeterminately sized so as to predeterminately control the flow of first fluid through the capillary aperture such that as the first fluid is delivered from the channel, outwardly through the aperture, the first fluid remains substantially on and along the outer surface of the first tube so as to coat the outer surface of the first tube with the first fluid, thereby creating an anti-infective barrier which surrounds the intravascular device as it lies beneath the skin and within a blood vessel.
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patent: 4737146 (1988-04-01), Amaki et al.
patent: 4846799 (1989-07-01), Tanaka et al.
patent: 4968306 (1990-11-01), Huss et al.
patent: 5021044 (1991-06-01), Sharkawy
patent: 5061255 (1991-10-01), Greenfeld et al.
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