System for preventing needle displacement in subcutaneous...

Details System for preventing needle displacement in subcutaneous... System for preventing needle displacement in subcutaneous...

A - Human Necessities

61

M

A61M 31/00 (2006.01) A61M 37/00 (2006.01) A61M 39/02 (2006.01)

Patent

CA 2185764

A threaded, dual needle system is securely attached to a modified subcutaneous venous access port having an internal reservoir, used for intravenous drug therapy particularly in human cancer treatment. A hollow outer needle is paired with a removable, male-threaded solid inner point and inserted through the patient's tissue and through the port's protective, self-sealind silicon septum, and the solid inner needle is then removed, while the outer needle is left in place. Next, a hollow inner needle is threaded through the outer needle to a depth sufficient to interlock with a female-threaded port receptacle at the base of the port's fluidreservoir and rotated to install. Optional additional threading can permit securing the outer needle to the two inner needles. A breakaway system prevents displacement from unintented pulling of the flow-line. The system thus provides additional protection against needle displacement from venous access ports, the resulting leakage, and the problems caused thereby.

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