Medical device with one or more helical coils

• US 6,332,892 B1
• Filed: 03/02/1999
• Issued: 12/25/2001
• Est. Priority Date: 03/02/1999
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Walls, Doug, Desmond, Joseph P. III
• Primary Examiner(s): Recla, Henry J.
• Assistant Examiner(s): HO, TAN-UYEN THI
• Application Number:
  US09/260,596
• Time in Patent Office: 1,029 Days
• Field of Search: 606/198, 604/588, 604/8, 604/10, 604/9, 604/280, 600/135, 600/139, 600/143, 600/144, 623/12, 623/14, 623/1.11, 623/1-2-
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/04 Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts A61F2/18, A61F2/20 take precedence; devices, other than stent-grafts, providing patency to, or preventing collapsing of, tubular structures of the body other than stent-grafts, e.g. stents A61F2/82; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/94 Stents retaining their form, i.e. not being deformable, after placement in the predetermined place
• CPC Class Codes: A61F 2002/047 Urethrae
• CPC Class Codes: A61M 27/008 pre-shaped, for use in the urethral or ureteral tract

Abstract

Medical devices, such as drainage stents, having coiled structures are useful in draining body fluids. A medical device has a first elongated section with a first cross-sectional area and a second elongated section with a second cross-sectional area. The second elongated section extends from the first elongated section. The second cross-sectional area is smaller than the first cross-sectional area. The second elongated section is or has at least one coiled structure with a plurality of turns, such as a helical coil tail.

Claims

1. A medical device for draining fluid, comprising:

(A) a first elongated section having a first cross-sectional area and comprising a tubular proximal section generally extending along an axis, the proximal section in connection with a distal section, the distal section comprising a curl offset from the axis; and

(B) a second elongated section having a second cross-sectional area and extending from the first elongated section, the second cross-sectional area being smaller than the first cross-sectional area and the second elongated section comprising two or more non-concentric coiled structures, at least two of the two or more coiled structures each having a plurality of turns.

2. The medical device of claim 1 wherein the proximal section defines a lumen.

3. The medical device of claim 2 wherein the plurality of turns of at least one of the at least two of the two or more coiled structures defines a passageway extending through the plurality of turns of the at least one of the at least two of the two or more coiled structures.

4. The medical device of claim 3 wherein the at least one of the at least two of the two or more coiled structures comprises a piece of solid material that is wound to form the plurality of turns of at least one of the at least two of the two or more coiled structures.

5. The medical device of claim 3 wherein the lumen communicates with the passageway.

6. The medical device of claim 1 wherein the distal segment comprises a retaining structure.

7. The medical device of claim 1 wherein the proximal segment comprises an elongated structure.

8. The medical device of claim 1 wherein the first section has at least one opening in a wall.

9. The medical device of claim 1 wherein at least one of the two or more coiled structures comprises a flexible material.

10. The medical device of claim 1 wherein the first and second elongated sections extend along a longitudinal axis.

11. The medical device of claim 1 wherein the medical device comprises a stent.

12. The medical device of claim 1 wherein the medical device comprises a ureteral drainage stent.

13. The medical device of claim 1 wherein at least one of the two or more coiled structures comprises a resilient material.