Blood access systems

Details Blood access systems Blood access systems

A - Human Necessities

61

M

128/80

A61M 5/00 (2006.01) A61M 1/00 (2006.01)

Patent

CA 1169731

IMPROVEMENTS IN BLOOD ACCESS SYSTEMS ABSTRACT Improvements and accessories for a septum closed T-shaped blood access device adapted for implantation into a patient. The implantable device has a stem portion extending above the skin of the patient and defining a septum closed opening into the device. The improvements include an improved septum having a groove in the side thereof encircling the septum and an elastomeric ring carried within the side groove, an improved needle assembly which provides access to the circulatory system through the septum, and a flexible cap for sealing the stem of the implantable device from the outside atmosphere which may be fitted in place or removed without the necessity of specialized tools. One of the accessories is a septum assembly insertion tool which simultaneously inserts the septum, a pressure plate and a retaining ring into the stem cavity of the implantable device. Another accessory is specialized forceps clamp for gripping the flanged upper edge of the stem of the implantable device. The clamp has curved finger holds which permit the stem of the implanted device to be stabilized during insertion of the septum assembly. Yet another accessory is a back-up septum system for plugging the cavity in the stem of the implanted device above the principal septum when the principal septum begins to fail. The back-up septum system comprises a specially designed spacer member, a septum conforming generally to the shape of the stem cavity above the retaining ring for the principal septum and a specially designed clamp for holding and compressing the back-up septum within the stem cavity. The back-up system permits continued access to the circulatory system until assistance can obtained in replacing the primary septum. A final accessory is a hemispherical implant cap which protects the stem cavity of the implantable device during implantation of the device in the body.

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