Prostatic stent

• US 5,167,614 A
• Filed: 10/29/1991
• Issued: 12/01/1992
• Est. Priority Date: 10/29/1991
• Status: Expired due to Term

• Current Assignee: Cabot Corporation
• Original Assignee: Medical Engineering Corporation
• Inventors: Shimkus, John A., Friso, Gerald T., Goldberg, Jay R., Tessmann, Terri L.
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): GUALTIERI, GINA
• Application Number:
  US07/784,293
• Time in Patent Office: 399 Days
• Field of Search: 623/1, 604/8
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2210/0019 operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes

Abstract

A stent for maintaining fluid flow through a body passage in a patient comprises a tubular member having an inlet at one end, an outlet at the other end and a lumen extending from the inlet to the outlet. The preferred stent also includes at least one projection on the outer wall of the tubular member which enters the wall of the body passage when the stent is rotated in the proper direction. A kit also is disclosed which includes the stent and a tool for grasping and turning the stent from outside the patient'"'"'s body.

Claims

1. A stent for maintaining fluid flow through the urethra which has a wall, said stent comprising:

a. an elongated tube having an inlet at one end and an outlet at a second end, and a lumen extending from the inlet to the outlet so that fluid can flow therethrough;

b. a plurality of unidirectional hook-like members on an outside of said tube so that when the stent is rotated within the urethra in one direction the members will engage the wall of the urethra and when the stent is rotated in an opposite direction the members will be disengaged from the wall of urethra.

2. A kit for anchoring a stent for maintaining fluid flow through the urethra which has a wall, said kit comprising:

a. a tubular stent having an inlet and an outlet and a lumen through which fluid can flow, said stent having hook-like anchoring means which when the stent is rotated within the urethra will engage the wall of the urethra to prevent the stent from migrating; and

b. an elongated grasping tool for grasping the stent in the urethra and extending outside the urethra so that the stent can be rotated in the urethra from outside the urethra to either engage or disengage the anchoring means from the wall of the urethra.