Systems, devices, and methods for the retrieval of an implant in the prostatic urethra
Systems, devices, and methods are provided for retrieval of an implant from the prostatic urethra. Embodiments of retrieval systems can include a device for insertion into the patient and a proximal control device for use in grasping a portion of the implant and withdrawing the implant into a lumen of the retrieval system.
1. A method of removing an implant from the urethra of a patient, the method comprising:
advancing a removal device within a urethra of a patient to a position near the implant, wherein the implant comprises a first portion, a second portion, and a third portion between the first portion and the second portion, wherein the removal device comprises an outer tubular member, an inner elongate tubular member within a lumen of the outer tubular member, an elongate actuating member within a lumen of the inner elongate tubular member, the elongate actuating member comprising a proximal end and a distal end, wherein the distal end comprises a grasper;
advancing the distal end of the elongate actuating member distal of a distal end of the inner elongate tubular member;
grabbing the third portion of the implant with the grasper; and
proximally withdrawing the elongate actuating member in the lumen of the inner elongate tubular member forming a bend in the third portion, wherein the first portion and the second portion of the implant are substantially straightened on either side of the bend within the lumen of the inner elongate tubular member.
2. The method of claim 1 , wherein the grasper comprises a hook.
3. The method of claim 2 , wherein the implant comprises an elongate wire and at least one enlarged end, and wherein the hook grasps the elongate wire.
4. The method of claim 2 , wherein a tip of the hook has a width between about 0.015″ to about 0.050″.
5. The method of claim 2 , wherein a tip portion of the hook is narrower than a back portion of the hook.
6. The method of claim 2 , wherein the inner elongate tubular member comprises a flexible distal region.
7. The method of claim 6 , wherein the flexible distal region comprises a laser cut tube.
8. The method of claim 2 , wherein the inner elongate tubular member is a hypotube.
9. The method of claim 2 , wherein the removal device further comprises a rigid member disposed over a distal region of the inner elongate tubular member.
10. The method of claim 2 , further comprising the step of viewing the hook with an imaging device after the hook is advanced distally beyond the distal end of the outer tubular member.
11. The method of claim 1 , wherein the bend forms in the implant as a result of a plurality of forces applied to the implant by a wall of the inner elongate tubular member and the hook.
12. The method of claim 1 , wherein the implant has an expanded helical shape.