Controlled depth injection device and method

• US 6,613,017 B1
• Filed: 08/08/2000
• Issued: 09/02/2003
• Est. Priority Date: 08/08/2000
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Mickley, Timothy J.
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): Lam, Ann Y.
• Application Number:
  US09/633,924
• Time in Patent Office: 1,120 Days
• Field of Search: 604/117, 604/93.01, 604/164.01, 604/164.09, 604/164.1, 604/164.11, 604/164.13, 604/170.02, 604/264, 604/272
• US Class Current: 604/117
• CPC Class Codes: A61M 2025/0089 Single injection needle protruding axially, i.e. along the longitudinal axis of the catheter, from the distal tip
• CPC Class Codes: A61M 25/0069 Tip not integral with tube
• CPC Class Codes: A61M 25/0084 being one or more injection needles

Abstract

A catheter adapted to deliver therapeutic or diagnostic agents to a target tissue of a human body is disclosed. A catheter in accordance with the present invention comprises a first elongate shaft having a proximal end, a distal end, and a lumen extending therethrough, a second elongate shaft disposed within the lumen of the first elongate shaft, the first elongate shaft including a first helical member comprising a plurality of turns, the second elongate shaft including a second helical member comprising a plurality of turns.

Claims

1. A catheter, comprising:

a first elongate shaft having a proximal end, a distal end having a distal tip, and a lumen extending therethrough;

a second elongate shaft disposed within the lumen of the first elongate shaft;

the first elongate shaft including a first helical member comprising a plurality of turns; and

the second elongate shaft including a second helical member comprising a plurality of turns

wherein the first helical member is longitudinally slidable within the lumen and the second elongate shaft is longitudinally slidable within the lumen when the first helical member is engaged with the second helical member.

2. The catheter of claim 1, wherein at least one turn of the second helical member is at least partially disposed between a plurality of turns of the first helical member.

3. The catheter of claim 1, wherein the second helical member is disposed in threading engagement with the first helical member.

4. The catheter of claim 1, wherein the first helical member comprises a thread.

5. The catheter of claim 1, wherein the first helical member comprises a coil.

6. The catheter of claim 1, wherein the second helical member comprises a thread.

7. The catheter of claim 1 further comprising:

a stop coupled to the second helical member, the stop positioned to limit the travel of a distal tip of the second helical member outside of a distal tip of the first helical member.

8. A catheter, comprising:

a first elongate shaft having a proximal end, a distal end having a distal tip, and a lumen extending therethrough;

a second elongate shaft disposed within the lumen of the first elongate shaft;

a first helical member comprising a plurality of turns; and

a second helical member comprising a plurality of turns defined by the second elongate shaft

wherein the first helical member is longitudinally slidable within the lumen and the second helical member is longitudinally slidable within the lumen when the second helical member is engaged with the first helical member.

9. The catheter of claim 8, wherein at least one turn of the second helical member is at least partially disposed between a plurality of turns of the first helical member.

10. The catheter of claim 8, wherein the second helical member is disposed in threading engagement with the first helical member.

11. The catheter of claim 8, wherein the first helical member comprises a thread.

12. The catheter of claim 8, wherein the first helical member comprises a coil.

13. The catheter of claim 8, wherein the second helical member comprises a coil at its distal tip.

14. A catheter, comprising:

a first elongate shaft having a proximal end, a distal end having a distal tip, and a lumen extending therethrough;

a second elongate shaft disposed within the lumen of the first elongate shaft;

a first helical member comprising a plurality of turns fixed to the first elongate shaft; and

a second helical member comprising a plurality of turns fixed to the second elongate shaft

wherein the second elongate shaft is longitudinally slidable within the second helical member when the second helical member is engaged with the first helical member.

15. The catheter of claim 14, wherein at least one turn of the second helical member is at least partially disposed between a plurality of turns of the first helical member and wherein the distance of travel of the second helical member outside of the first helical member is limited by a stop.

16. The catheter of claim 14, wherein the second helical member is disposed in threading engagement with the first helical member.

17. The catheter of claim 14, wherein the first helical member comprises a coil.

18. The catheter of claim 14, wherein the second helical member comprises a thread.

19. The catheter of claim 14, wherein the second helical member comprises a coil at its distal tip.