Methods and systems for subcutaneous graft implantation
First Claim
1. A method for recirculating blood to a patient, said method comprising:
- placing a draw catheter so that a distal tip thereof is positioned in a right atrium of the patient'"'"'s heart; and
placing a return catheter so that a distal tip thereof is positioned in a superior vena cava;
wherein extracorporeal blood flow from the draw catheter to the return catheter may be established;
wherein a draw lumen is disposed at a distal end of the draw catheter and wherein the draw lumen is disposed distally of a distal end of the return catheter by a distance between 5 cm to 10 cm.
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Accused Products
Abstract
The present invention provides improved methods for establishing vascular access to a patient'"'"'s body lumen or other target location, particularly blood vessels, for performing extracorporeal treatments, such as hemodialysis, hemofiltration, hemodiafiltration, plasmapheresis, apheresis, and the like, on circulating blood. In particular, the present invention provides improved methods which may enhance extracorporeal blood flow rates, reduce instances of fibrin sheath or thrombosis formation, and minimize recirculation effects. Methods for recirculating blood to a patient include placing a draw catheter so that a distal tip thereof is positioned in a right atrium of the patient'"'"'s heart. A return catheter is placed so that a distal tip thereof is positioned in a superior vena cava. Extracorporeal blood flow from the draw catheter to the return catheter may then be established.
115 Citations
21 Claims
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1. A method for recirculating blood to a patient, said method comprising:
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placing a draw catheter so that a distal tip thereof is positioned in a right atrium of the patient'"'"'s heart; and
placing a return catheter so that a distal tip thereof is positioned in a superior vena cava;
wherein extracorporeal blood flow from the draw catheter to the return catheter may be established;
wherein a draw lumen is disposed at a distal end of the draw catheter and wherein the draw lumen is disposed distally of a distal end of the return catheter by a distance between 5 cm to 10 cm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 19)
a draw catheter;
a return catheter; and
instructions to use the draw catheter and the return catheter to recirculate blood to a patient according to any of claims 1-3 or 16-18.
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- 16. An improved method for recirculating blood to a patient, wherein the improvement comprises passing a draw catheter and a return catheter into a superior vena cava and placing the draw catheter beyond a distal end of the return catheter for establishing extracorporeal blood flow from the draw catheter to the return catheter, wherein a distal end of the draw catheter is disposed distally of the distal end of the return catheter by a distance in a range from 5 to 10 cm.
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20. A method for recirculating blood to a patient, said method comprising:
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placing a draw catheter so that a distal tip thereof is positioned in a right atrium of the patient'"'"'s heart; and
placing a return catheter so that a distal tip thereof is positioned in a superior vena cava;
wherein extracorporeal blood flow from the draw catheter to the return catheter may be established;
wherein the draw catheter and the return catheter both pass into the superior vena cava, with the draw catheter extending beyond a distal end of the return catheter;
wherein the draw catheter and return catheter comprise elastomeric tubular bodies having substantially uniform diameters over their entire lengths, wherein a distal end of the draw catheter is chamfered.
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21. A method for recirculating blood to a patient, said method comprising:
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placing a draw catheter so that a distal tip thereof is positioned in a right atrium of the patient'"'"'s heart; and
placing a return catheter so that a distal tip thereof is positioned in a superior vena cava;
wherein extracorporeal blood flow from the draw catheter to the return catheter may be established;
wherein the draw catheter and the return catheter both pass into the superior vena cava, with the draw catheter extending beyond a distal end of the return catheter;
wherein the draw catheter and return catheter comprise elastomeric tubular bodies having substantially uniform diameters over their entire lengths, wherein the distal end of the return catheter is chamfered.
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Specification