Splitable tip catheter with bioresorbable adhesive

摘要

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.

主权项

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 extraction lumen with the blood vessel,a distal return tip portion for fluidic coupling of the return lumen with the blood vessel, anda cyanoacrylate-free bioresorbable adhesive, comprising a bonding element and a degradable element, located between the separable distal tip portions to join the distal tip portions together prior to insertion into a blood vessel, the bioresorbable adhesive enabling the distal tip portions to separate following insertion;wherein at least one distal tip portion is made of a shape memory material to facilitate an angular separation of the distal tip portions from each other to a pre-adhesive position following degradation of the adhesive.