Splitable tip catheter with bioresorbable adhesive
First Claim
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1. A method for hemodialysis, comprising:
- providing a multi-lumen catheter assembly with at least a blood extraction lumen and a blood return lumen extending longitudinally therethrough, having a proximal end adapted for coupling to a hemodialysis apparatus, and having a distal end terminating in separable distal tip portions for blood extraction and return, the distal tip portions joined together by a bioresorbable adhesive including a bonding element and a degradable element, at least a portion of the bioresorbable adhesive disposed between the distal tip portions;
inserting the distal end of the multi-lumen catheter assembly into a blood vessel; and
allowing the bioresorbable adhesive to degrade such that the distal tip portions separate from each other within the blood vessel.
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Abstract
Splitable-tip catheters are disclosed with bioresorbable adhesive to provide spatial separation of distal tip elements during use. The invention can be particularly useful in hemodialysis applications where it is desirable to separate blood extraction and return lumens. The adhesive facilitates insertion of the distal end of the catheter as an assembly, e.g., into a blood vessel using a single guidewire, while the bioresorbable nature of the adhesive allows the tip elements to separate in vivo.
693 Citations
20 Claims
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1. A method for hemodialysis, comprising:
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providing a multi-lumen catheter assembly with at least a blood extraction lumen and a blood return lumen extending longitudinally therethrough, having a proximal end adapted for coupling to a hemodialysis apparatus, and having a distal end terminating in separable distal tip portions for blood extraction and return, the distal tip portions joined together by a bioresorbable adhesive including a bonding element and a degradable element, at least a portion of the bioresorbable adhesive disposed between the distal tip portions; inserting the distal end of the multi-lumen catheter assembly into a blood vessel; and allowing the bioresorbable adhesive to degrade such that the distal tip portions separate from each other within the blood vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for hemodialysis, comprising:
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providing a multi-lumen catheter assembly with at least a blood extraction lumen and a blood return lumen extending longitudinally therethrough, having a proximal end adapted for coupling to a hemodialysis apparatus, and having a distal end terminating in separable distal tip portions for blood extraction and return, a memory gap formed between the blood extraction lumen and the blood return lumen, the distal tip portions joined together by a bioresorbable adhesive including a bonding element and a degradable element; and inserting the distal end of the multi-lumen catheter assembly into a blood vessel; and
allowing the adhesive to degrade such that the distal tip portions separate from each other within the blood vessel;wherein the memory gap facilitates the separation of the distal tip portions from each other to a pre-adhesive position following degradation of the adhesive.
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Specification