Medical device systems and methods including safety release, lumen fluid-providing mechanisms, or both

Patent metadata

Field	Value
Publication number	US-2017128697-A1
Application number	US-201615332318-A
Country	US
Kind code	A1
Filing date	Oct 24, 2016
Priority date	Nov 6, 2015
Publication date	May 11, 2017
Grant date	—

Abstract

A medical device system may include a catheter sheath and a catheter shaft sized for delivery through a lumen of the catheter sheath. The catheter shaft may be coupled to an end effector at or adjacent a distal end of the catheter shaft. The catheter shaft may include a lumen and a control element. The control element may be coupled to the end effector and may reside within the lumen of the catheter shaft. Physical access may be provided to the control element, to allow the control element to be severed to facilitate removal of the end effector from a bodily cavity. The control element may include a lumen and a control cable therein. A liquid entry port may be provided in the lumen of the control element toward a distal end of the control element to allow expedited provision of fluid to a distal portion of the control element.

First claim

What is claimed is:

1 . A method of operating a medical device system, the medical device system comprising a catheter shaft, a control cable lumen within the catheter shaft, and a control cable within the control cable lumen, the control cable lumen provided by a first sleeve comprising a proximal end and a distal end, the distal end arranged to be percutaneously insertable into a body while the proximal end remains outside of the body, the method comprising:
adding liquid into the catheter shaft via a liquid supply port; and continuing to add the liquid into the catheter shaft via the liquid supply port at least until a sufficient amount of the liquid has been added into the catheter shaft to enter a liquid intake port of the first sleeve leading to the control cable lumen and flush a distal portion of the control cable lumen of a fluid other than the liquid, the distal portion of the control cable lumen extending from the distal end of the first sleeve, and the liquid intake port of the control cable lumen located within the catheter shaft and closer to the distal end of the first sleeve than the proximal end of the first sleeve.

2 . The method of claim 1 , comprising continuing to add the liquid into the catheter shaft via the liquid supply port at least until a sufficient amount of the liquid has been added into the catheter shaft to enter the liquid intake port and flush a proximal portion of the control cable lumen of the fluid other than the liquid, the proximal portion of the control cable lumen located closer to the proximal end of the first sleeve than to the distal portion of the control cable lumen.

3 . The method of claim 1 , comprising continuing to add the liquid into the catheter shaft via the liquid supply port at least until a sufficient amount of the liquid has been added into the catheter shaft to enter the liquid intake port and flush a proximal portion of the control cable lumen of the fluid other than the liquid, the proximal portion of the control cable lumen extending from and including the proximal end of the first sleeve.

4 . The method of claim 1 , wherein the liquid intake port is spaced along the first sleeve from each of the proximal end of the first sleeve and the distal end of the first sleeve.

5 . The method of claim 1 , wherein the liquid supply port is located closer to the proximal end of the first sleeve than the distal end of the first sleeve.

6 . The method of claim 1 , wherein the catheter shaft comprises a first end portion and a second end portion, the first end portion arranged to be percutaneously insertable into the body while the second end portion remains outside of the body, and wherein the liquid supply port is located closer to the second end portion than the first end portion.

7 . The method of claim 1 , wherein the control cable lumen is a first lumen of at least two lumens within the catheter shaft, and wherein the liquid supply port leads to a second lumen of the at least two lumens other than the first lumen.

8 . The method of claim 7 , wherein the second lumen is provided by a second sleeve comprising a proximal end and a distal end, the distal end of the second sleeve arranged to be percutaneously insertable into the body while the proximal end of the second sleeve remains outside of the body, and wherein the liquid supply port is located on the second sleeve closer to the proximal end of the second sleeve than to the distal end of the second sleeve.

9 . The method of claim 7 , wherein each of the first lumen and the second lumen is provided by a respective tubular member.

10 . The method of claim 7 , wherein the first lumen is provided by a tubular member located in the second lumen.

11 . The method of claim 7 , wherein the catheter shaft comprises a first end portion and a second end portion, the first end portion arranged to be percutaneously insertable into the body while the second end portion remains outside of the body, and wherein each lumen of the at least two lumens comprises a respective longitudinal axis extending between the first end portion of the catheter shaft and the second end portion of the catheter shaft, each lumen of the at least two lumens comprising a respective cross-sectional area circumferentially bounded by at least one surface as viewed along the respective longitudinal axis, and wherein the respective cross-sectional areas of the first lumen and the second lumen are different.

12 . The method of claim 8 , wherein the first lumen comprises a first longitudinal axis extending between the proximal end of the first sleeve and the distal end of the first sleeve, wherein the second lumen comprises a second longitudinal axis extending between the proximal end of the second sleeve and the distal end of the second sleeve, wherein the first lumen comprises a first cross-sectional area circumferentially bounded by at least one surface as viewed along the first longitudinal axis, wherein the second lumen comprises a second cross-sectional area circumferentially bounded by at least one surface as viewed along the second longitudinal axis, and wherein the second cross-sectional area is larger than the first cross-sectional area.

13 . The method of claim 1 , wherein the control cable lumen is a first lumen of at least two lumens, each lumen of the at least two lumens provided by a respective sleeve, each respective sleeve comprising a respective proximal end and a respective distal end, each respective distal end arranged to be percutaneously insertable into the body while the respective proximal end remains outside of the body, and wherein the adding liquid into the catheter shaft via the liquid supply port provides a flow of the liquid through a second lumen of the at least two lumens toward the respective distal end of the respective sleeve providing the second lumen, the second lumen other than the first lumen.

14 . The method of claim 2 , wherein the control cable lumen is provided by a first lumen of at least two lumens, each lumen of the at least two lumens provided by a respective sleeve, each respective sleeve comprising a respective proximal end and a respective distal end, each respective distal end arranged to be percutaneously insertable into the body while the respective proximal end remains outside of the body, and wherein the adding liquid into the catheter shaft via the liquid supply port provides a flow of the liquid through a second lumen of the at least two lumens toward the respective distal end of the respective sleeve providing the second lumen, the second lumen other than the first lumen.

15 . The method of claim 1 , wherein the catheter shaft comprises a first end portion and a second end portion, the first end portion arranged to be percutaneously insertable into the body while the second end portion remains outside of the body, and wherein the medical device system comprises an end effector located at least proximate the first end portion of the catheter shaft, the control cable operatively coupled to the end effector, and wherein the method comprises providing relative movement between a portion of the control cable and a portion of the first sleeve to execute, at least in part, a particular end effector function of the end effector.

16 . The method of claim 1 , wherein the medical device system comprises an end effector and at least one actuator provided in an enclosure, the catheter shaft extending between the end effector and the at least one actuator, and the control cable operatively coupled between the at least one actuator and the end effector to selectively enable a particular end

Assignees

• Kardium Inc

Inventors

• Moisa Saar
• O'Keane Julie Elizabeth
• Garben Ian
• Hawes Peter Josiah

Classifications

• A61B2018/00196

  reciprocating lengthwise · CPC title

• A61B2018/00839

  Bioelectrical parameters, e.g. ECG, EEG · CPC title

• A61N1/362

  Heart stimulators (heart defibrillators A61N1/39) · CPC title

• A61B18/02

  by cooling, e.g. cryogenic techniques · CPC title

• A61B2017/00367

  Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like · CPC title