Percutaneous access device

Claim 1

A cutaneous device for interconnection of an internal space inside the body and an external space outside said body, comprising: a threaded cylinder substantially open at the top and having a smaller opening at the base; a subcutaneous base plate attached to said base of said threaded cylinder; a screw cap with an opening in the top and a threaded portion on the base for engaging with said threaded cylinder; a resilient, elastic seal enclosed in said screw cap with a passage formed therethrough in alignment with said opening in said top of said screw cap; an outer catheter having a rigid end portion passing through said opening in said screw cap and said passage, whereby said passage closes when said outer catheter is withdrawn therefrom; a plate with an opening, interposed between said base of said outer cylinder and said seal, said plate opening in alignment with said passage, a seat formed in the top of said plate adjacent to said opening for receiving the rigid end portion of said outer catheter, whereby said plate forms a support means for said seal and pressure on said seal is increased by advancing said threads of said screw cap onto said cutaneous device; and an inner catheter passing through said opening in said base of said outer cylinder and connected to said opening in the bottom of said plate, whereby said inner catheter is in communication with said passage.