Multilumen body for an implantable medical device

• US 20040097965A1
• Filed: 11/19/2002
• Published: 05/20/2004
• Est. Priority Date: 11/19/2002
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Gardeski, Kenneth C., Leners, Michael R.
• Granted Patent: US 7,130,700 B2
• Time in Patent Office: Days
• US Class Current: 606/129
• CPC Class Codes: A61M 2025/0036 with more than four lumina
• CPC Class Codes: A61M 25/0021 characterised by the form of the tubing A61M25/0054 takes precedence
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts

Abstract

A splined multilumen body for use in elongated medical devices is provided for carrying multiple conductors, wires or cables to multiple device components along the device body. Open lumens may be provided through which medical devices or therapies may be delivered. The multilumen body is constructed from a generally tubular outer member having inward-radiating splines that mate with outward-radiating splines on a generally tubular inner member. Lumens formed between sets of mated splines isolate conductors carried therein. Interaction of mated splines provides good torque transfer between outer and inner members. Materials for fabricating outer and inner members may be selected to achieve desired torque transfer properties, flexibility, and surface friction.

Claims

1. A multilumen body of an implantable medical device extending from a proximal end to a distal end, comprising:

a first tubular member having a first plurality of members; and

a second tubular member having a second plurality of members, pairs of one of the first plurality of members and the second plurality of members forming receiving portions receiving the other of the first plurality of members and the second plurality of members to fixedly engage the first tubular member and the second tubular member, wherein the first tubular member and the second tubular member form a plurality of lumens extending from the proximal end through the distal end of the multibody lumen, the plurality of lumens receiving elongated members therein.

2. The multilumen body of claim 1, further comprising a wall portion extending between adjacent members of the other of the first plurality of members and the second plurality of members, wherein the plurality of lumens are formed by the wall portion and adjacent pairs of the one of the first plurality of members and the second plurality of members forming the receiving portion.

3. The multilumen body of claim 1, wherein torque applied along the proximal end of the multilumen body is transferred to the distal end of the multilumen body through the first tubular member and the second tubular member.

4. The multilumen body of claim 1, wherein the first plurality of members extend radially inward and the second plurality of members extend radially outward.

5. The multilumen body of claim 4, further comprising an inner lumen formed centrally within the second tubular member for delivering one of a medical device and a therapy.

6. The multilumen body of claim 1, wherein the first tubular member is formed of a first material and the second tubular member is formed of a second material different from the first material.

7. The multilumen body of claim 1, further comprising a plurality of sensors axially spaced along the distal end of the multilumen body, wherein the elongated members include conductors coupled to the plurality of sensors.

8. The multilumen body of claim 7, wherein the plurality of sensors include one of a location sensor, a steering sensor, an absolute pressure sensor, a temperature sensor, an oxygen sensor, a pH sensor, and an acoustical sensor.

9. The multilumen body of claim 1, further comprising an anchoring member positioned along the distal end of the multilumen body, wherein the elongated members include a deflection member coupled to the anchoring member, the deflection member transferring tension applied along the proximal end of the multilumen body to advance the distal end of the multilumen body between a nondeflected position and a deflected position.

10. The multilumen body of claim 7, wherein the conductors include a first wire having a first distal segment and a second wire having a second distal segment forming twisted pair conductors, and the plurality of sensors include wound conductive wires extending from a first end to a second end, wherein a portion of the first end is helically engaged about the first distal segment and the second end is helically engaged about the second distal segment.

11. The multilumen body of claim 1, further comprising a plurality of electrodes axially spaced along the distal end of the multilumen body, wherein the elongated members include conductors coupled to the plurality of electrodes.

12. The multilumen body of claim 1, wherein the first tubular member includes a plurality of insulating segments, and wherein one or more of the plurality of insulating segments includes the first plurality of members formed thereon.

13. The multilumen body of claim 1, further comprising a plurality of anchoring members positioned along a plurality of longitudinal locations along the distal end of the multilumen body, wherein the elongated members include a plurality of deflection members coupled to the plurality of anchoring members, the plurality of deflection members transferring tension applied along the proximal end of the multilumen body to advance the distal end of the multilumen body between a non-deflected position and a deflected position.

14. The multilumen body of claim 1, further comprising:

a first anchoring member positioned along the distal end of the multilumen body; and

a second anchoring member positioned proximally from the first anchoring member along the distal end of the multilumen body, wherein the elongated members include a first deflection member and a second deflection member coupled to the first anchoring member, and a third deflection member and a fourth deflection member coupled to the second anchoring member, the first deflection member and the second deflection member advancing a first portion of the distal end of the multilumen body between a first portion non-deflected position and a first portion deflected position to form a first curved portion, and the third deflection member and the fourth deflection member advancing a second portion of the distal end of the multilumen body between a second non-deflected position and a second deflected position to form a second curved portion.

15. The multilumen body of claim 14, wherein the first portion and the second portion form a third curved portion along the distal end of the multilumen body.

16. The multilumen body of claim 15, wherein a first lumen of the plurality of lumens receiving the first deflection member is positioned approximately 180 degrees about the first tubular member and the second tubular member from a second lumen of the plurality of lumens receiving the second deflection member, and a third lumen of the plurality of lumens receiving the third deflection member is positioned approximately 180 degrees about the first tubular member and the second tubular member from a fourth lumen of the plurality of lumens receiving the fourth deflection member.

17. The multilumen body of claim 1, wherein the elongated members include one or more of a conductor, a fluid delivery needle, and a deflection member, the deflection member transferring tension applied along the proximal end of the multilumen body to advance the distal end of the multilumen body between a non-deflected position and a deflected position.

18. A multilumen body of an implantable medical device extending from a proximal end to a distal end, comprising:

a first tubular member having a first plurality of members;

a second tubular member having a second plurality of members, pairs of one of the first plurality of members and the second plurality of members forming receiving portions receiving the other of the first plurality of members and the second plurality of members to fixedly engage the first tubular member and the second tubular member;

a wall portion extending between adjacent members of the other of the first plurality of members and the second plurality of members; and

a plurality of lumens extending from the proximal end through the distal end of the multibody lumen and formed by the wall portion and adjacent pairs of the one of the first plurality of members and the second plurality of members forming the receiving portion, the plurality of lumens receiving elongated members therein.

19. The multilumen body of claim 18, wherein the first tubular member is formed of a first material and the second tubular member is formed of a second material different from the first material.

20. The multilumen body of claim 19, further comprising a plurality of sensors axially spaced along the distal end of the multilumen body, wherein the elongated members include conductors coupled to the plurality of sensors.

21. The multilumen body of claim 20, wherein the plurality of sensors include one of a location sensor, an absolute pressure sensor, a temperature sensor, an oxygen sensor, a pH sensor, and an acoustical sensor.

22. The multilumen body of claim 20, further comprising an anchoring member positioned along the distal end of the multilumen body, wherein the elongated members include a deflection member coupled to the anchoring member, the deflection member transferring tension applied along the proximal end of the multilumen body to advance the distal end of the multilumen body between a non-deflected and a deflected position.

23. The multilumen body of claim 22, wherein the conductors include a first wire having a first distal segment and a second wire having a second distal segment forming twisted pair conductors, and the plurality of sensors include wound conductive wires extending from a first end to a second end, wherein a portion of the first end is helically engaged about the first distal segment and the second end is helically engaged about the second distal segment.

24. The multilumen body of claim 19, further comprising a plurality of electrodes axially spaced along the distal end of the multilumen body, wherein the elongated members include conductors coupled to the plurality of electrodes.

25. The multilumen body of claim 24, further comprising a plurality of anchoring members positioned along a plurality of longitudinal locations along the distal end of the multilumen body, wherein the elongated members include a plurality of deflection members coupled to the plurality of anchoring members, the plurality of deflection members transferring tension applied along the proximal end of the multilumen body to advance the distal end of the multilumen body between a non-deflected position and a deflected position.

26. The multilumen body of claim 24, further comprising:

a first anchoring member positioned along the distal end of the multilumen body; and

a second anchoring member positioned proximally from the first anchoring member along the distal end of the multilumen body, wherein the elongated members include a first deflection member and a second deflection member coupled to the first anchoring member, and a third deflection member and a fourth deflection member coupled to the second anchoring member, the first deflection member and the second deflection member advancing a first portion of the distal end of the multilumen body between a first portion non-deflected position and a first portion deflected position to form a first curved portion, and the third deflection member and the fourth deflection member advancing a second portion of the distal end of the multilumen body between a second non-deflected position and a second deflected position to form a second curved portion.

27. The multilumen body of claim 26, wherein the first portion and the second portion form a third curved portion along the distal end of the multilumen body.

28. The multilumen body of claim 27, wherein a first lumen of the plurality of lumens receiving the first deflection member is positioned approximately 180 degrees about the first tubular member and the second tubular member from a second lumen of the plurality of lumens receiving the second deflection member, and a third lumen of the plurality of lumens receiving the third deflection member is positioned approximately 180 degrees about the first tubular member and the second tubular member from a fourth lumen of the plurality of lumens receiving the fourth deflection member.

29. The multilumen body of claim 19, wherein the elongated members include one or more of a conductor, a fluid delivery needle, and a deflection member, the deflection member transferring tension applied along the proximal end of the multilumen body to advance the distal end of the multilumen body between a non-deflected position and a deflected position.