DEFLECTABLE ACCESS SHEATH HANDLE ASSEMBLY WITH LOCKING MECHANISM

• US 20150119800A1
• Filed: 10/22/2014
• Published: 04/30/2015
• Est. Priority Date: 10/25/2013
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Neoh, WenHong, Eells, Robert M., Melsheimer, Jeffrey S., Bunch, Tyler J., Van Wyk, Kristen Michelle
• Granted Patent: US 9,814,490 B2
• Time in Patent Office: Days
• US Class Current: 604/95.04
• CPC Class Codes: A61B 1/00135 Oversleeves mounted on the endoscope prior to insertion
• CPC Class Codes: A61B 1/0052 Constructional details of control elements, e.g. handles
• CPC Class Codes: A61B 17/3468 for implanting or removing devices, e.g. prostheses, implants, seeds, wires devices for implanting seeds A61M37/0069
• CPC Class Codes: A61B 2017/00318 Steering mechanisms
• CPC Class Codes: A61B 2017/00327 with actuating members moving in opposite directions
• CPC Class Codes: A61B 2017/00407 Ratchet means
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/00778 Operations on blood vessels A61B2017/22097, A61B2017/320741 take precedence
• CPC Class Codes: A61M 2025/015 Details of the distal fixation of the movable mechanical means
• CPC Class Codes: A61M 25/0136 Handles therefor
• CPC Class Codes: A61M 25/0147 with movable mechanical means, e.g. pull wires
• CPC Class Codes: A61M 25/0662 Guide tubes

Abstract

An elongate access sheath comprises a proximal portion and a lumen. The proximal portion supports a control handle, a brake pad, a tension gear, and a locking trigger. A deflector filament extends through the lumen and is coupled to the tension gear. The tension gear includes an outside and an inner engagement portion. The brake pad comprises a slot and an outside engagement portion. The locking trigger includes a pin disposed within the brake pad slot. The control handle includes a lever and an engagement portion. Upward movement of the lever engages the engagement portion with the outside engagement portion of the tension gear to rotate the tension gear in a first direction and slides the deflector filament to bend the lumen distal portion. Translation of the locking trigger engages the brake pad and the tension gear to prevent rotation of the tension gear in an opposite second direction.

Claims

1. An elongate access sheath, comprising:

a distal portion, a proximal portion, and an elongate portion extending therebetween, the elongate portion defines a lumen therethrough, and the distal portion is bendable with respect to a longitudinal axis of the elongate portion;

the proximal portion supporting a control handle, and a tension gear;

a deflector filament slidably extending through the lumen, and operatively coupled to said distal portion and said tension gear, wherein said at least one deflector filament is mounted such that rotation of said tension gear urges sliding movement within said lumen;

wherein said tension gear is rotatably mounted to the proximal portion and includes an outside engagement portion, wherein said outside engagement portion comprises teeth that are located on an outside engagement portion of said tension gear;

said control handle comprising a lever portion and an engagement portion that comprises input teeth, wherein the input teeth of the engagement portion are meshed with the outside engagement portion of said tension gear such that upward movement of the lever portion causes rotation of said tension gear in a first direction and sliding motion of the deflector filament within the lumen to urge the distal portion to bend with respect to the longitudinal axis.

2. An elongate access sheath of claim 1 wherein said elongate access sheath further includes a brake pad and a locking trigger:

wherein said brake pad is disposed within said hollow center of said tension gear and comprises a slot and an outside engagement portion, wherein said opening is disposed vertically on said brake pad and said outside engagement portion is located on the outside engagement portion of said brake pad and aligned to engage the inner engagement portion of said tension gear;

wherein said locking trigger is attached to said tension gear and includes a body portion and a pin, wherein said pin is disposed within the slot of said brake pad; and

wherein translation of the locking trigger causes the pin to slide within the slot and urge engagement between the brake pad and said tension gear thereby preventing rotation of said tension gear in an opposite second direction.

3. An elongate access sheath of claim 2 wherein said locking trigger can be translated to cause said pin of said locking trigger to slide in said slot of said brake pad to allow rotation of said tension gear in said opposite second direction.

4. An elongate access sheath of claim 2 wherein said locking trigger protrudes from said access sheath to allow actuation of said locking trigger.

5. An elongate access sheath of claim 2 wherein said proximal portion of said access sheath includes an indicator that is actuated when said locking trigger is translated to engage the brake pad and said tension gear.

6. An elongate access sheath, comprising:

a distal portion, a proximal portion, and an elongate portion extending therebetween, the elongate portion defines a lumen therethrough, and the distal portion is bendable with respect to a longitudinal axis of the elongate portion;

the proximal portion supporting a control handle, a brake pad, a tension gear, and a locking trigger;

a deflector filament slidably extending through the lumen, and operatively coupled to said distal portion and said tension gear, wherein said at least one deflector filament is mounted such that rotation of said tension gear urges sliding movement within said lumen;

wherein said tension gear is rotatably mounted to the proximal portion and includes an outside engagement portion and an inner engagement portion defined within a hollow enter of said tension gear, wherein said outside engagement portion comprises teeth;

wherein said brake pad is disposed within said hollow center of said tension gear and comprises a slot and a ratchet portion disposed upon an outer surface of the brake pad, wherein said slot is disposed vertically on said brake pad, wherein the ratchet portion is aligned to engage the inner engagement portion of said tension gear;

said locking trigger is attached to said tension gear and includes a body portion and a pin, wherein said pin is disposed within the slot of said brake pad;

said control handle comprising a lever portion and an engagement portion that comprises input teeth, wherein the input teeth of the engagement portion are meshed with the outside engagement portion of said tension gear such that upward movement of the lever portion causes rotation of said tension gear in a first direction and sliding motion of the deflector filament within the lumen to urge the distal portion to bend with respect to the longitudinal axis, wherein translation of the locking trigger causes the pin to slide within the slot and urge engagement between the brake pad and said tension gear thereby preventing rotation of said tension gear in an opposite second direction, wherein said outside engagement portion prevents the rotation of said tension gear in an opposite second direction.

7. An elongate access sheath of claim 6 wherein said ratchet portion is comprised of angled teeth, wherein said angled teeth are angled in an opposite second direction to restrict movement of said tension gear when said brake pad and said tension gear are engaged;

and wherein said ratchet portion allows further rotation of said tension gear in a first direction upon additional upward movement of said lever portion while preventing rotation of said tension gear in an opposite second direction.

8. An elongate access sheath of claim 6 wherein said locking trigger can be translated to cause said pin of said locking trigger to slide in said slot of said brake pad to allow rotation of said tension gear in said opposite second direction.

9. An elongate access sheath of claim 6 wherein said locking trigger protrudes from said access sheath to allow actuation of said locking trigger.

10. An elongate access sheath of claim 6 wherein said proximal portion of said access sheath includes an indicator that is actuated when said locking trigger is translated to engage the brake pad and said tension gear.

11. An elongate access sheath, comprising:

a distal portion, a proximal portion, and an elongate portion extending therebetween, the elongate portion defines a lumen therethrough, and the distal portion is bendable with respect to a longitudinal axis of the elongate portion;

the proximal portion supporting a control handle, a brake pad, a tension gear, and a locking trigger;

a deflector filament slidably extending through the lumen, and operatively coupled to said distal portion and said tension gear, wherein said at least one deflector filament is mounted such that rotation of said tension gear urges sliding movement within said lumen;

wherein said tension gear is rotatably mounted to the proximal portion and includes an outside engagement portion and an inner engagement portion, wherein said outside engagement portion comprises teeth that are located on an outer surface of said tension gear;

wherein said brake pad is disposed within said hollow center of said tension gear and comprises a slot and a friction portion, wherein said slot is disposed vertically on said brake pad and said friction portion is located on an outer surface of said brake pad and aligned to engage the inner engagement portion of said tension gear;

said locking trigger is attached to said tension gear and includes a body portion and a pin, wherein said pin is disposed within the slot of said brake pad;

said control handle comprising a lever portion and an engagement portion that comprises input teeth, wherein the input teeth of the engagement portion are meshed with the outside engagement portion of said tension gear such that upward movement of the lever portion causes rotation of said tension gear in a first direction and sliding motion of the deflector filament within the lumen to urge the distal portion to bend with respect to the longitudinal axis, wherein translation of the locking trigger causes the pin to slide within the slot and urge engagement between the brake pad and said tension gear thereby preventing rotation of the tension gear in an opposite second direction.

12. An elongate access sheath of claim 11 wherein said inner engagement portion of said tension gear has a chamfered edge.

13. An elongate access sheath of claim 11 wherein said locking trigger can be translated to cause said pin of said locking trigger to slide in said slot of said brake pad to allow rotation of said tension gear in said opposite second direction.

14. An elongate access sheath of claim 11 wherein said locking trigger protrudes from said access sheath to allow actuation of said locking trigger.

15. An elongate access sheath of claim 11 wherein said proximal portion of said access sheath includes an indicator that is actuated when said locking trigger is translated to engage the brake pad and said tension gear.