Surgery – Blood drawn and replaced or treated and returned to body
Patent
1986-07-18
1988-09-13
Pellegrino, Stephen C.
Surgery
Blood drawn and replaced or treated and returned to body
604 44, 604 52, 604272, A61M 532
Patent
active
047706520
ABSTRACT:
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 cathter 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 attachemnt 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.
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Pellegrino Stephen C.
Rudisill Stephen G.
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