Handle for catheter assembly with multifunction wire

• US 5,987,344 A
• Filed: 08/27/1997
• Issued: 11/16/1999
• Est. Priority Date: 08/08/1996
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: West, Scott H.
• Primary Examiner(s): Dvorak, Linda C. M.
• Assistant Examiner(s): Ruddy, David M.
• Application Number:
  US08/920,340
• Time in Patent Office: 811 Days
• Field of Search: 600/146-150, 600/373-375, 600/377, 600/381, 600/372, 600/585, 607/116, 607/119, 607/122, 604/264, 604/523, 604/528
• US Class Current: 600/373
• CPC Class Codes: A61B 2018/00916 with means for switching or controlling the main function of the instrument or device
• CPC Class Codes: A61B 2018/00946 slidable
• CPC Class Codes: A61B 2018/00952 rotatable
• CPC Class Codes: A61M 25/0136 Handles therefor
• CPC Class Codes: A61M 25/0141 having flexible regions as a result of using materials with different mechanical properties
• CPC Class Codes: A61M 25/0144 having flexible regions as a result of inner reinforcement means, e.g. struts or rods
• CPC Class Codes: A61M 25/0147 with movable mechanical means, e.g. pull wires
• CPC Class Codes: A61N 1/0565 Electrode heads

Abstract

Multifunction and radial deflection wires (66, 64) extend from a catheter shaft (8) and into a handle (4). The multifunction wire is pulled and pushed longitudinally and is rotated about its axis to change the stiffness of and to laterally deflect the tip portion (12). A curve size manipulator (32) on the handle body (24) moves the multifunction wire longitudinally but does not hinder its rotational movement. Rotation of a lateral deflection manipulator (38) on the handle causes the proximal end (70) of the multifunction wire to rotate about its own axis; the free longitudinal movement of the proximal end is unhindered. Any initial corkscrewing or other deflection of the tip portion can be removed at assembly by rotating the proximal end (68) of the radial deflection wire. The longitudinal movement of the manipulators can be limited by movable stops (120). The longitudinal positions of the abutment faces (126, 128) of the stops preferably change according to their longitudinal (distal or proximal) orientation.

Claims

1. A catheter assembly comprising:

a proximal end assembly comprising a body; and

a catheter extending from the proximal end assembly, the catheter comprising a catheter shaft, having a longitudinal axis, and a multifunction element, having proximal and distal portions, extending along the longitudinal axis;

the proximal end assembly comprising;

a longitudinal position manipulator operably coupled to the multifunction element to move the multifunction element along the longitudinal axis; and

a lateral deflection manipulator operably coupled to the multifunction element to rotate the multifunction element about the longitudinal axis, wherein the catheter shaft has a tip portion, said tip portion having a lateral deflection lumen housing at least a part of the distal portion of the multifunction element, the lateral deflection lumen and the distal portion of the multifunction element having interfering torquing surfaces so that rotating the multifunction element causes lateral deflection of the tip portion through the engagement of the interfering torquing surfaces.

2. The catheter assembly according to claim 1 wherein the distal portion of the multifunction element is unattached to the tip portion and thus is free to slide along the lateral deflection lumen.

3. The catheter assembly according to claim 1 wherein said longitudinal position manipulator includes means for selectively securing said longitudinal position manipulator to chosen locations along the body.

4. The catheter assembly according to claim 1 further comprising means for limiting the relative rotary motion between the lateral deflection manipulator and the hollow body.

5. The catheter assembly according to claim 1 wherein the lateral deflection manipulator is rotatably mounted to the body, and further comprising a detent to provide a physical indication of a chosen rotary orientation of the lateral deflection manipulator relative to the hollow body.

6. The catheter assembly according to claim 1 wherein the multifunction element is a flexible wire.

7. A catheter assembly comprising:

a proximal end assembly comprising a body; and

a catheter extending from the proximal end assembly, the catheter comprising a catheter shaft, having a longitudinal axis, and a multifunction element, having proximal and distal portions, extending along the longitudinal axis;

the proximal end assembly comprising;

a longitudinal position manipulator operably coupled to the multifunction element to move the multifunction element along the longitudinal axis; and

a lateral deflection manipulator operably coupled to the multifunction element to rotate the multifunction element about the longitudinal axis, wherein

the catheter shaft comprises a deflectable tip portion;

the catheter comprises a radial deflection element having a proximal end housed within the body and a distal end connected to the tip portion;

the proximal end assembly comprises a second longitudinal position manipulator operably coupled to the radial deflection element to move the radial deflection element along the longitudinal axis causing the tip portion to deflect.

8. The catheter assembly according to claim 7 further comprising means for adjusting the rotary orientation of the proximal end of the radial deflection element relative to the hollow body.

9. The catheter assembly according to claim 7 further comprising means for removing an initial lateral deflection of the tip portion.

10. A catheter assembly comprising:

a proximal end assembly comprising a body; and

a catheter extending from the proximal end assembly, the catheter comprising a catheter shaft, having a longitudinal axis, and a multifunction element, having proximal and distal portions, extending along the longitudinal axis;

the proximal end assembly comprising;

a longitudinal position manipulator operably coupled to the multifunction element to move the multifunction element along the longitudinal axis; and

a lateral deflection manipulator operably coupled to the multifunction element to rotate the multifunction element about the longitudinal axis, wherein the lateral deflection manipulator comprises a split ring including semi-circular split ring portions.

11. A catheter assembly comprising:

a proximal end assembly comprising a body; and

a catheter extending from the proximal end assembly, the catheter comprising a catheter shaft, having a longitudinal axis, and a multifunction element, having proximal and distal portions, extending along the longitudinal axis;

the proximal end assembly comprising;

a longitudinal position manipulator operably coupled to the multifunction element to move the multifunction element along the longitudinal axis; and

a lateral deflection manipulator operably coupled to the multifunction element to rotate the multifunction element about the longitudinal axis, wherein the longitudinal position manipulator is slidably mounted to the body for movement between first and second longitudinal positions, and further comprising at least one movable stop mounted to the hollow body at a chosen longitudinal position, said stop sized and positioned to prevent the longitudinal movement of the longitudinal position manipulator past said chosen longitudinal position.

12. The catheter assembly according to claim 11 comprising distally- and proximally-positioned movable stops.

13. The catheter assembly according to claim 11 wherein said hollow body has a range of stop-locating positions at which said stop can be mounted.

14. The catheter assembly according to claim 13 wherein said stop comprises an abutment portion and a leg extending from said abutment portion, said leg mountable at the stop-locating positions.

15. The catheter assembly according to claim 14 wherein:

said abutment portion has a longitudinal thickness between said first and second abutment faces; and

said leg is longitudinally-offset so as not to be centered between said abutment faces;

whereby the longitudinal positions of the first and second abutment faces change according to whether the first or the second abutment face is a distally-facing face.

16. A catheter assembly comprising:

a proximal end assembly comprising a hollow body;

a catheter extending from the body of the proximal end assembly, the catheter comprising a catheter shaft and a multifunction element having a proximal portion extending from the catheter shaft into the hollow body;

the proximal end assembly further comprising;

a longitudinal position manipulator slidably mounted to the body for movement between first and second longitudinally spaced apart positions;

a rotary coupling rotatably connecting the longitudinal position manipulator and the proximal portion of the multifunction element so that longitudinal movement of the longitudinal position manipulator moves the proximal portion longitudinally while the proximal portion is permitted to rotate freely relative to the longitudinal position manipulator;

a lateral deflection manipulator rotatably mounted to the body for rotational movement about the body; and

means for rotatably drivingly coupling the lateral deflection manipulator to the proximal portion of the multifunction element while permitting free longitudinal movement of the multifunction element relative to the lateral deflection manipulator;

wherein the proximal portion of the multifunction element can be independently moved longitudinally and rotated by independent longitudinal and rotational movement of the longitudinal position and lateral deflection manipulators, respectively.

17. The catheter assembly according to claim 16 wherein the rotatably coupling means comprises:

a drive adapter as the proximal portion of the multifunction element; and

a rotary driver, operably coupled to the lateral deflection manipulator, rotatably mounted at a chosen location within the body.

18. The catheter assembly according to claim 17 wherein the rotary driver comprises a first gear having a central bore through which the drive adapter longitudinally slidably passes, said central bore and drive adapter having torque-transmitting surfaces.

19. The catheter assembly according to claim 16 wherein the rotatably coupling means comprises internal gear teeth formed on said lateral deflection manipulator, and a three-gear gear train coupling the internal gear teeth and the proximal portion of the multifunction element.

20. A catheter assembly comprising:

a catheter comprising an elongate catheter shaft housing a multifunction element and a radial deflection element, said catheter shaft having a proximal end, said multifunction element and said radial deflection element having proximal ends extending from said proximal end of the catheter shaft;

a proximal end adapter comprising;

a hollow body having a distal end, the proximal end of the catheter shaft secured to the distal end of the hollow body with the proximal ends of said multifunction element and said radial deflection element extending into said hollow body;

a radial deflection manipulator slidably mounted to the hollow body and connected to the proximal end of the radial deflection element to permit the longitudinal position of the radial deflection element proximal end within the hollow body to be changed;

the multifunction element comprising an elongate drive adapter housed within the hollow body;

a curve size manipulator slidably mounted to the hollow body;

a rotary coupling rotatably joining the curve size manipulator and the multifunction element to permit rotary motion of the multifunction element to be substantially unrestricted by said curve size manipulator while permitting the longitudinal position of the multifunction element proximal end within the hollow body to be changed according to the longitudinal position of the curve size manipulator;

a lateral deflection manipulator rotatably mounted to the body;

a rotary driver rotatably mounted within the hollow body at a chosen location, said rotary driver having a central bore through which the driver adapter freely longitudinally slides;

the rotary driver and the drive adapter comprising torque transmitting surfaces rotationally coupling the rotary driver and the drive adapter; and

a rotary drive connection between the lateral deflection manipulator and the rotary driver so that rotating the lateral defection manipulator rotates the multifunction element.

21. The catheter assembly according to claim 20 wherein the catheter shaft has a tip portion, said tip portion having a lateral deflection lumen housing a distal portion of the multifunction element, the lateral deflection lumen and the distal portion of the multifunction element having interfering torquing surfaces so that rotating the multifunction element causes lateral deflection of the tip portion through the engagement of the interfering torquing surfaces.

22. The catheter assembly according to claim 20 wherein:

the rotary driver comprises a first gear; and

the rotary drive connection comprises an internal gear surface formed on the lateral defection manipulator, a second gear engaging the internal gear surface and a third gear drivably coupling the first and second gears.