Rapid exchange enteral stent delivery system
First Claim
1. A rapid exchange type stent delivery catheter comprising:
- an outer tubular member having a proximal end, a distal end, and a guidewire entry port positioned closer to the distal end than the proximal end;
an inner tubular member positioned at least partially inside a lumen defined by the outer tubular member, the inner tubular member extending distally from a location distal of the guidewire entry port and defining a guidewire lumen in communication with the guidewire entry port; and
an elongate pushing member attached to the inner tubular member and extending proximally from a location distal of the guidewire entry port to a location proximal of the proximal end of the outer tubular member;
wherein the inner tubular member and the outer tubular member are axially movable with respect to one another, wherein distal movement of the outer tubular member is limited by a distal end surface of the inner tubular member and proximal movement of the inner tubular member is limited by a distal end surface of the outer tubular member;
wherein the outer tubular member comprises a proximal section including a hypotube having an outer diameter and a distal section comprising a distal tubular member having an outer diameter that is larger than the outer diameter of the hypotube;
further comprising an intermediate tubular member, wherein a portion of the distal tubular member is crimped down to the intermediate tubular member and a portion of the elongate pushing member extends through the intermediate tubular member.
0 Assignments
0 Petitions
Accused Products
Abstract
Devices for palliating gastrointestinal strictures using rapid exchange type enteral stent placement catheters. The catheter may include an inner member and an outer member, with the two members being slidable with respect to one another. In various device embodiments, a ramp for directing a guidewire out from within the catheter is provided using portions of the outer member or a shaped mandrel. The inner member may take a number of forms, including a tubular distal portion, a skived or integrally attached elongate midsection, and a proximal portion. A mandrel can be used in a portion proximal of the guidewire ramp, with the mandrel taking one of several disclosed forms.
-
Citations
19 Claims
-
1. A rapid exchange type stent delivery catheter comprising:
-
an outer tubular member having a proximal end, a distal end, and a guidewire entry port positioned closer to the distal end than the proximal end; an inner tubular member positioned at least partially inside a lumen defined by the outer tubular member, the inner tubular member extending distally from a location distal of the guidewire entry port and defining a guidewire lumen in communication with the guidewire entry port; and an elongate pushing member attached to the inner tubular member and extending proximally from a location distal of the guidewire entry port to a location proximal of the proximal end of the outer tubular member; wherein the inner tubular member and the outer tubular member are axially movable with respect to one another, wherein distal movement of the outer tubular member is limited by a distal end surface of the inner tubular member and proximal movement of the inner tubular member is limited by a distal end surface of the outer tubular member; wherein the outer tubular member comprises a proximal section including a hypotube having an outer diameter and a distal section comprising a distal tubular member having an outer diameter that is larger than the outer diameter of the hypotube; further comprising an intermediate tubular member, wherein a portion of the distal tubular member is crimped down to the intermediate tubular member and a portion of the elongate pushing member extends through the intermediate tubular member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification