초록 ▼

A T-shaped blood access device which is adapted for implantation into a patient and which has its stem portion extending outwardly above the skin of the patient. An elastomeric septum is positioned in sealing relationship in the stem adjacent the junction with the main conduit portion. The septum is

A T-shaped blood access device which is adapted for implantation into a patient and which has its stem portion extending outwardly above the skin of the patient. An elastomeric septum is positioned in sealing relationship in the stem adjacent the junction with the main conduit portion. The septum is compressed between a support extension within the device stem and a pressure plate above the septum. The septum is provided with pre-formed openings therethrough to provide a resealable pathway for a needle pair. The septum may have a concave edge to facilitate sealing along the interior device edges and to accommodate laterally displaced septum material during needle insertion. A needle assembly which includes a pair of round ended needles with side openings is preferably used with the T-shaped device. The needle assembly may include a pair of spring loaded sleeve members which normally surround the needles so as to cover the needle side openings during insertion through the septum but which expose the openings as the needles are pushed further downward into the blood stream. A cavity above the septum and a cooperating flanged snap-on cap are provided for keeping the assembly sterile between uses by use of a sterilizing fluid. The arms of the T may be connected directly to the circulatory system or by means of an intermediate polymeric vascular graft.

대표청구항 ▼

An implantable access device for providing access to the circulatory system comprising: a rigid body of biologically compatible material, said body having a generally T-shaped tubular configuration with the stem of the T joined to and in fluid communication with the arms of the T, support means inte

An implantable access device for providing access to the circulatory system comprising: a rigid body of biologically compatible material, said body having a generally T-shaped tubular configuration with the stem of the T joined to and in fluid communication with the arms of the T, support means internal to and at the junction of the stem and arms, a elastomeric septum member within the stem having first and second sides and positioned therein so that a portion of said first side is contiguous with and supported by said support means with the remaining portion of said first side that is exposed to the tube of said arms generally parallel with the upper inner surface of said arms, and septum retaining means within said stem member above said second side for compressively supporting said septum member therein in fixed relationship to said arms thereby sealing said stem opening when it is positioned within the cavity of said stem.