IP Library › Granted Patent US 12,295,692
Granted Patent B2
US 12,295,692 · App. 18/200,620 · Granted May 13, 2025

Steerable catheter with shaft load distributions

Inventors: Miles Joseph (San Jose, CA); Francis Macnamara (Mountain View, CA)
Assignee: Auris Health, Inc.
A61B34/71A61B34/30A61M25/0147A61B2034/301A61B34/37A61B2034/715A61M2025/015
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Quick Facts
Patent No.
US 12,295,692
App. No.
18/200,620
Granted
May 13, 2025
Kind
B2
Abstract

A steerable catheter system may include a flexible elongate catheter body, a drive mechanism at the proximal end of the catheter body, and at least one group of pullwires extending along a length of the catheter body. The catheter body may include a distal articulating section and a proximal non-articulating section. Each group of pullwires includes at least two pullwires, and each of the pullwires is anchored at a first end to the distal end of the catheter body and at a second end to the drive mechanism. The pullwires of each group are positioned close to one another in the catheter wall to concentrate the forces and cause deflection along the articulating section of the catheter body and diverge away from one another to reach a more separated distribution around a circumference of the catheter body to distribute the forces and prevent deflection along the non-articulating section.

Claims (37)

1. An apparatus comprising:

(a) an elongate member comprising:

(i) a first longitudinal portion,

(ii) a second longitudinal portion proximal to the first longitudinal portion, and

(iii) a third longitudinal portion proximal to the second longitudinal portion; and

(b) an articulation assembly operable to drive articulation of the first longitudinal portion via a first set of pullwires without simultaneously driving articulation of the second longitudinal portion, the first set of pullwires having a non-equal angular distribution in the first longitudinal portion and an equal angular distribution in the second longitudinal portion, the articulation assembly being further operable to drive articulation of the second longitudinal portion via a second set of pullwires without simultaneously driving articulation of the first longitudinal portion, the second set of pullwires having an equal angular distribution in the first longitudinal portion and a non-equal angular distribution in the second longitudinal portion, such that the first longitudinal portion and the second longitudinal portion are operable to articulate independently relative to each other.

2. The apparatus of claim 1 , the elongate member comprising a catheter.

3. The apparatus of claim 1 , the third longitudinal portion being configured to remain straight as the first longitudinal portion and the second longitudinal portion are in respective articulated states.

4. The apparatus of claim 3 , the third longitudinal portion being configured to form a stiff rail.

5. The apparatus of claim 4 , the third longitudinal portion having sufficient stiffness to resist deflection while the articulation assembly drives articulation of one or both of the first longitudinal portion or the second longitudinal portion.

6. The apparatus of claim 1 , the first set of pullwires comprising a first pair of pullwires, the pullwires of the first pair being angularly spaced apart from each other by approximately 180 degrees along the second longitudinal portion, the pullwires of the first pair being angularly spaced apart by less than 180 degrees along the first longitudinal portion.

7. The apparatus of claim 6 , the pullwires of the first pair being angularly spaced apart by less than 180 degrees along the third longitudinal portion.

8. The apparatus of claim 6 , the pullwires of the first pair being angularly spaced apart by approximately 180 degrees along the third longitudinal portion.

9. The apparatus of claim 6 , the second set of pullwires comprising a second pair of pullwires, the pullwires of the second pair being angularly spaced apart from each other by approximately 180 degrees along the first longitudinal portion, the pullwires of the second pair being angularly spaced apart by less than 180 degrees along the second longitudinal portion.

10. The apparatus of claim 9 , the pullwires of the second pair being angularly spaced apart by less than 180 degrees along the third longitudinal portion.

11. The apparatus of claim 9 , the pullwires of the second pair being angularly interposed between the pullwires of the first pair along the third longitudinal portion.

12. The apparatus of claim 1 , the articulation assembly comprising a plurality of motors, the plurality of motors being operable to drive movement of the pullwires to thereby drive articulation of the elongate member.

13. The apparatus of claim 1 , the articulation assembly being operable to drive articulation of the first longitudinal portion in at least four different directions without simultaneously driving articulation of the second longitudinal portion.

14. The apparatus of claim 1 , the articulation assembly being operable to drive articulation of the first longitudinal portion in at least six different directions without simultaneously driving articulation of the second longitudinal portion.

15. The apparatus of claim 1 , the articulation assembly being operable to drive articulation of the second longitudinal portion in at least four different directions without simultaneously driving articulation of the first longitudinal portion.

16. The apparatus of claim 1 , the articulation assembly being operable to drive articulation of the second longitudinal portion in at least six different directions without simultaneously driving articulation of the first longitudinal portion.

17. An apparatus comprising:

(a) an elongate member comprising:

(i) a first longitudinal portion,

(ii) a second longitudinal portion proximal to the first longitudinal portion, and

(iii) a third longitudinal portion proximal to the second longitudinal portion; and

(b) a plurality of pullwires operable to drive articulation of the first longitudinal portion along two or more different articulation planes independently of the second longitudinal portion, the plurality of pullwires being further operable to drive articulation of the second longitudinal portion along two or more different articulation planes independently of the first longitudinal portion, the plurality of pullwires having a first angular arrangement relative to each other along the first longitudinal portion and a second angular arrangement relative to each other along the second longitudinal portion, the first angular arrangement being configured to distribute loads so that no bending moment is applied to the first longitudinal portion upon driving articulation of the second longitudinal portion via the plurality of pullwires, the second angular arrangement being configured to distribute loads so that no bending moment is applied to the second longitudinal portion upon driving articulation of the first longitudinal portion via the plurality of pullwires.

18. The apparatus of claim 17 , wherein the second angular arrangement is different from the first angular arrangement.

19. An apparatus comprising:

(a) an elongate member comprising:

(i) a distal articulation section,

(ii) a proximal articulation section proximal to the distal articulation section, and

(iii) a shaft section proximal to the proximal articulation section; and

(b) a plurality of pullwires, the plurality of pullwires comprising a first set of pullwires and a second set of pullwires, the first set of pullwires operable to drive articulation of the distal articulation section in a first direction to thereby form a first bend along the distal articulation section, the second set of pullwires being operable to drive articulation of the proximal articulation section in a second direction to thereby form a second bend along the proximal articulation section, the first direction and the second direction being different such that the elongate member forms a double bend configuration, the first set of pullwires having a non-equal angular distribution in the distal articulation section and an equal angular distribution in the proximal articulation section, the second set of pullwires having an equal angular distribution in the distal articulation section and a non-equal angular distribution in the proximal articulation section.

20. The apparatus of claim 19 , further comprising a plurality of motors configured to:

pull the first set of pullwires to drive articulation of the distal articulating section independently from the proximal articulating section, and

pull the second set of pullwires to drive articulation of the proximal articulating section independently from the distal articulating section.

Continuity (3)
Continuation 16588890 · Sep 30, 2019
Division 15248316 · Aug 26, 2016
Related Publication 20240000533A1 · Jan 4, 2024
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