Splitable tip catheter with bioresorbable adhesive
First Claim
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1. A multi-lumen catheter device for hemodialysis, comprising:
- an elongate catheter body 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 adapted for insertion in a blood vessel, the distal end further comprising;
a distal extraction tip portion for fluidic coupling of the blood extraction lumen with the blood vessel;
a distal return tip portion for fluidic coupling of the blood return lumen with the blood vessel;
at least one gap between the distal extraction tip portion and the distal return tip portion that facilitates the entry of fluid between the distal tip portions; and
a bioresorbable adhesive located between the separable distal tip portions distal to the at least one gap, the adhesive configured to join the distal tip portions together for insertion into the blood vessel while maintaining the at least one gap between the distal tip portions, the bioresorbable adhesive dissolvable in blood of the blood vessel, thereby facilitating separation of the distal tip portions from each other following insertion.
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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.
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Citations
25 Claims
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1. A multi-lumen catheter device for hemodialysis, comprising:
an elongate catheter body 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 adapted for insertion in a blood vessel, the distal end further comprising; a distal extraction tip portion for fluidic coupling of the blood extraction lumen with the blood vessel; a distal return tip portion for fluidic coupling of the blood return lumen with the blood vessel; at least one gap between the distal extraction tip portion and the distal return tip portion that facilitates the entry of fluid between the distal tip portions; and a bioresorbable adhesive located between the separable distal tip portions distal to the at least one gap, the adhesive configured to join the distal tip portions together for insertion into the blood vessel while maintaining the at least one gap between the distal tip portions, the bioresorbable adhesive dissolvable in blood of the blood vessel, thereby facilitating separation of the distal tip portions from each other following insertion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
Specification