A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/127, 128/81
A61M 25/00 (2006.01) A61M 1/34 (2006.01) A61M 1/36 (2006.01)
Patent
CA 1334271
A patient dependent on extracorporeal treatments is subjected to minimal insertion trauma and pain both before and after a fistula operation. A phlebotomy method is disclosed using a veno-occlusive tourniquet or ligation occluding a venous segment at a location between the inlet and return openings of a dual lumen catheter so that a high blood flow rate can be obtained for an extracorporeal treatment system, thereby lessening or delaying the need for a fistula operation. Registration or alignment of the veno- occlusive tourniquet or ligation is ensured by an attachment to the catheter. Preferably the tourniquet or ligation includes an elastic band threaded to the attachment. If a fistula operation becomes necessary or has been performed, insertion trauma and pain is minimized by using a dual-lumen needle having a tapered distal end portion terminating in a beveled cutting edge. Preferably the needle has an outer tube of swaged stainless steel and an internal divider having a distal end portion matching and engaging with the reduced internal diameter of the tapered distal end portion of the outer tube.
616674
Mahurkar Sakharam D.
Marks & Clerk
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