Medical stent and related methods

• US 7,347,866 B2
• Filed: 03/10/2003
• Issued: 03/25/2008
• Est. Priority Date: 03/10/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Intoccia, Alfred P., Daignault, Kenneth J.
• Primary Examiner(s): Dawson; Glenn K.
• Application Number:
  US10/385,209
• Publication Number:
  US 20040181235A1
• Time in Patent Office: 1,842 Days
• Field of Search: 623 2364- 237
• US Class Current: 606/191
• CPC Class Codes: A61M 2210/1089 Urethra
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 27/008 pre-shaped, for use in the urethral or ureteral tract

Abstract

A stent includes a conduit defining a lumen; a first malecot adjacent the conduit, where the first malecot includes at least two members having at least one slit therebetween and where the at least one slit is in fluid communication with the lumen; and a second malecot including an annular structure surrounding and protruding from the conduit. A method for placing a stent includes inserting into a patient a stent and a stylet disposed within the stent, where the stylet includes an expandable member, expanding the expandable member, seating the stent, and removing the expandable member.

Claims

1. A stent comprising:

a first conduit defining a first lumen, a proximal end, and a distal end, the first conduit comprising a first malecot at the distal end comprising at least two members having at least one slit therebetween and in fluid communication with the first lumen, the first conduit further comprising a spring disposed within the first conduit and a second malecot at the proximal end comprising an enclosed annular structure surrounding and protruding from the first conduit, the enclosed annular structure being angled over the spring and disposed at an angle relative to the first conduit and pointed in a distal direction; and

a second conduit connected to the first conduit, the second conduit defining a second lumen, the second conduit comprising a third malecot comprising at least two members having at least one slit therebetween and in fluid communication with the second lumen.

2. The stent of claim 1 wherein the first malecot comprises a diameter larger than a diameter of the second malecot.

3. The stent of claim 1 wherein at least one of the first conduit, the first malecot, the second malecot, the second conduit, and the third malecot is formed from a material having a durometer value less then about 60 on a Shore A scale.

4. The stent of claim 1 wherein at least one of the first conduit, the first malecot, the second malecot, the second conduit, and the third malecot is formed from a material having a durometer value less than about 30 on a Shore A scale.

5. The stent of claim 1 wherein at least one of the first conduit, the first malecot, the second malecot, the second conduit, and the third malecot comprises a silicone polymer.

6. The stent of claim 1 wherein the at least two members of the first malecot are capable of folding such that the size of the at least one slit of the first malecot is larger when the at least two members of the first malecot are in a first position than when the at least two members of the first malecot are in a second position.

7. The stent of claim 1 wherein the second conduit is connected to the first conduit by at least one connector suture.

8. The stent of claim 1 wherein the spring is disposed within a wall of the first conduit.