Rapid exchange enteral stent delivery system
AssigneeBoston Scientific Scimed, Inc.
InventorsGary A. Jordan, Gary J. Leanna, George Tom Roberts
Life of this patent
Estimating the term…
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.
Claims20
A stent delivery catheter comprising:
- an outer member having an outer member circumference and comprising a wall defining a lumen, the wall comprising:
- a distal section, wherein the wall extends around an entirety of the outer member circumference;
- a guidewire port section extending from the distal section, wherein the wall extends around only a portion of the outer member circumference to define a guidewire port;
- a proximal section proximal to the guidewire port section, wherein the wall extends around an entirety of the outer member circumference;
- an inner member having an inner member circumference and comprising a wall defining a lumen, the inner member positioned inside the lumen of the outer member, the wall comprising:
- a stent receiving section, wherein the wall extends around an entirety of the inner member circumference, the stent receiving section positioned inside the distal section of the outer member, wherein the lumen defined by the wall is a guidewire lumen;
- a mandrel positioned in the lumen of the outer member.
A stent delivery system comprising:
- an outer catheter, the outer catheter comprising an outer wall defining an outer lumen, the wall comprising a guidewire port section, the guidewire port section defining a guidewire port having a proximal edge at a first longitudinal position and a distal edge at a second longitudinal position, the guidewire port having a longitudinal length measured from the first longitudinal position and the second longitudinal position;
- an inner catheter longitudinally moveable relative to the outer catheter, the inner catheter positioned inside the outer lumen, the inner catheter comprising a stent receiving section defining a guidewire lumen in communication with the guidwire port and the outer lumen;
- a guidewire ramp extending at a downward angle from the proximal edge of the guidewire port;
- and
- a mandrel positioned within the outer lumen, wherein a distal end of the mandrel is positioned proximal to a proximal end of the inner catheter.
A stent delivery catheter comprising:
- an outer catheter, the outer catheter comprising an outer wall defining an outer lumen, the outer wall comprising a guidewire port section, the guidewire port section defining a guidewire port having a proximal edge at a first longitudinal position and a distal edge at a second longitudinal position, the guidewire port having a longitudinal length measured from the first longitudinal position and the second longitudinal position;
- an inner catheter positioned inside the outer lumen, the inner catheter comprising a wall defining an inner lumen, the wall defining a port section aligned with the guidewire port section of the outer catheter, the port section defining a port having a proximal edge at a first longitudinal position and a distal edge at a second longitudinal position, the port having a longitudinal length measured from the first longitudinal position and the second longitudinal position;
- a mandrel positioned partially inside the outer lumen and partially inside the inner lumen;
- and
- a ramp secured to a distal end of the mandrel, the ramp extending at a downward angle from the proximal edge of the guidewire port;
- wherein the port of the inner catheter is longitudinally slidable relative to the ramp.
Dependencies are inferred from the claim text.