04897081 is referenced by 638 patents and cites 6 patents.

Disclosed is a percutaneous access device (PAD) for long-term skin penetration and use as an access port in the body of a patient. The buttonlike device includes a flat skirt for subdermal anchoring of the PAD and a neck through which a tube may extend for transmission of materials to or from the body. A two-stage porous bed covering the skirt and at least a portion of the neck promotes formation of a tight, infection-free barrier between the percutaneous access device and adjacent tissues, stabilizing the device for long-term use. The first stage of the bed retards downgrowth of epidermal cells for a time sufficient for mature collagen to form in the second stage, thereby permitting the tight dermal/biomaterial interface or barrier to form at a location near the junction of the two stages.

Title
Percutaneous access device
Application Number
613931
Publication Number
4897081
Application Date
February 17, 1987
Publication Date
January 30, 1990
Inventor
Benedict D T Daly
Wellesley
MA, US
Warren C Clay
Lynn
MA, US
Victor L Poirier
Chelmsford
MA, US
Agent
Herbert E Messenger
Assignee
TMCA Foundation
MA, US
Thermedics
MA, US
IPC
A61F 1/00
A61M 25/02
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