Method and apparatus for using dual-lumen catheters for extracor

Details Method and apparatus for using dual-lumen catheters for extracor Method and apparatus for using dual-lumen catheters for extracor

1988-04-19

1989-06-27

Pellegrino, Stephen C.

Surgery

Means for introducing or removing material from body for...

Material introduced into and removed from body through...

604115, 604280, A61M 2500

Patent

active

048425826

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 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.

REFERENCES:
patent: 2234961 (1941-03-01), Canada
patent: 3324854 (1967-06-01), Weese
patent: 4098275 (1978-07-01), Consalvo
patent: 4403983 (1983-09-01), Delman et al.
patent: 4643711 (1987-02-01), Bates

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