Method of reducing infection utilizing an intravascular device h

Details Method of reducing infection utilizing an intravascular device h Method of reducing infection utilizing an intravascular device h

1979-10-19

1981-03-03

Michell, Robert W.

Surgery

Truss

Pad

A61M 2500

Patent

active

042534631

ABSTRACT:
An intravascular device such as a catheter, having a flexible outer tubular portion or cannula and a relatively rigid inner tubular portion or stylet of metal such as stainless steel with a sharp pointed distal end protruding from the distal end of the cannula to pierce the skin and permit entry of the cannula into the vein of a patient. The opposite, or proximal, end of the cannula includes a tubular adapter or fitting to accept a corresponding tubular adapter at the proximal end of the stylet when fully inserted into the cannula. After inserting the device into a patient's vein, the stylet is withdrawn and a connecting member of a container is connected to the tubular adapter of the cannula, either for withdrawing samples of blood or for feeding an intravenous substance into the patient's vein. The flexible outer tubular member which comprises the cannula of this invention is made of a flexible plastic material such as polyethylene and includes a metal coating to present a metal surface to the tissue of the patient at the entry point of the device into the patient's skin. A metal surface at such point has been found to minimize infection. In a modification of the device, the distal or free end portion of the cannula may be of a flexible plastic material while the opposite or proximal end portion which is in contact with the patient's tissue at the entry point when the cannula is fully inserted is made of metal.

REFERENCES:
patent: 3313299 (1967-04-01), Spademan
patent: 4106506 (1978-08-01), Koehn et al.

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