Tissue-removing catheter

Patent metadata

Field	Value
Publication number	US-2018317956-A1
Application number	US-201815970757-A
Country	US
Kind code	A1
Filing date	May 3, 2018
Priority date	May 3, 2017
Publication date	Nov 8, 2018
Grant date	—

Abstract

A tissue-removing catheter for removing tissue in a body lumen includes an elongate body having an axis and proximal and distal end portions spaced apart from one another along the axis. The elongate body is sized and shaped to be received in the body lumen. A handle is mounted to the proximal end portion of the elongate body and operable to cause rotation of the elongate body. A tissue-removing element is mounted on the distal end portion of the elongate body. An inner liner is received within the elongate body and coupled to the handle at a proximal end of the inner liner. A sensor is arranged with respect to the elongate body and inner liner and is configured to detect wear of the inner liner caused by the elongate body contacting the inner liner during use.

First claim

What is claimed is:

1 . A tissue-removing catheter for removing tissue in a body lumen, the tissue-removing catheter comprising:
an elongate body having an axis and proximal and distal end portions spaced apart from one another along the axis, the elongate body being sized and shaped to be received in the body lumen; a handle mounted to the proximal end portion of the elongate body and operable to cause rotation of the elongate body; a tissue-removing element mounted on the distal end portion of the elongate body, the tissue-removing element being configured to remove the tissue as the tissue-removing element is rotated by the elongate body within the body lumen; an inner liner received within the elongate body and coupled to the handle at a proximal end of the inner liner, the inner liner defining a guidewire lumen; and a sensor arranged with respect to the elongate body and inner liner and configured to detect wear of the inner liner caused by the elongate body contacting the inner liner during use.

2 . A tissue-removing catheter as set forth in claim 1 , wherein the sensor provides an indication of at least one of when the elongate body comes into contact with a guidewire received in the guidewire lumen of the inner liner, and when the elongate body comes into contact with an interior portion of the inner liner.

3 . A tissue-removing catheter as set forth in claim 2 , wherein the sensor comprises a first contact associated with the elongate body and a second contact associated with the guidewire, the first contact coming into electrical communication with the second contact indicating wear of the inner liner.

4 . A tissue-removing catheter as set forth in claim 3 , wherein the handle includes a motor and a drive operatively connecting the motor to the elongate body for rotating the elongate body, the first contact being attached to the drive.

5 . A tissue-removing catheter as set forth in claim 4 , wherein the handle includes a guidewire lock configured to lock the guidewire in place relative to the handle, the second contact being attached to the guidewire lock.

6 . A tissue-removing catheter as set forth in claim 5 , wherein the second contact is attached directly to the guidewire lock.

7 . A tissue-removing catheter as set forth in claim 5 , further comprising a connector attached to the handle, wherein the second contact is directly attached to the connector.

8 . A tissue-removing catheter as set forth in claim 4 , wherein the drive comprises a drive shaft and a drive key connected to the drive shaft, the first contact being attached to the drive key.

9 . A tissue-removing catheter as set forth in claim 2 , wherein the sensor comprises a first contact associated with the elongate body and a second contact associated with the inner liner, the first contact coming into electrical communication with the second contact indicating wear of the inner liner.

10 . A tissue-removing catheter as set forth in claim 1 , wherein a distal end of the inner liner extend distally of the tissue-removing element.

11 . A tissue-removing catheter as set forth in claim 1 , further comprising a motor in the handle and operatively engaging the elongate body for driving rotation of the elongate body and tissue-removing element mounted on the elongate body.

12 . A tissue-removing catheter for removing tissue in a body lumen, the tissue-removing catheter comprising:
an elongate body having an axis and proximal and distal end portions spaced apart from one another along the axis, the elongate body being sized and shaped to be received in the body lumen; a tissue-removing element mounted on the distal end portion of the elongate body, the tissue-removing element being configured to remove the tissue as the tissue-removing element is rotated by the elongate body within the body lumen; an inner liner received within the elongate body, the inner liner defining a guidewire lumen; and a sensor arranged with respect to the elongate body and inner liner and configured to detect wear of the inner liner caused by the elongate body contacting the inner liner during use.

13 . A tissue-removing catheter as set forth in claim 12 , wherein the sensor provides an indication of at least one of when the elongate body comes into contact with a guidewire received in the guidewire lumen of the inner liner, and when the elongate body comes into contact with an interior portion of the inner liner.

14 . A tissue-removing catheter as set forth in claim 13 , wherein the sensor comprises a first contact associated with the elongate body and a second contact associated with the guidewire, the first contact coming into electrical communication with the second contact indicating wear of the inner liner.

15 . A tissue-removing catheter as set forth in claim 14 , further comprising a motor and a drive operatively connecting the motor to the elongate body for rotating the elongate body, the first contact being attached to the drive.

16 . A tissue-removing catheter as set forth in claim 15 , further comprising a guidewire lock configured to lock the guidewire in place, the second contact being attached to the guidewire lock.

17 . A tissue-removing catheter as set forth in claim 16 , wherein the drive comprises a drive shaft and a drive key connected to the drive shaft, the first contact being attached to the drive key.

18 . A tissue-removing catheter as set forth in claim 13 , wherein the sensor comprises a first contact associated with the elongate body and a second contact associated with the inner liner, the first contact coming into electrical communication with the second contact indicating wear of the inner liner.

19 . A method of removing tissue in a body lumen, the method comprising:
advancing a tissue-removing catheter over a guidewire in the body lumen to position a distal end of the catheter adjacent the tissue and a proximal end portion of the catheter outside of the body lumen, the catheter comprising an elongate body, a tissue removing element mounted on a distal end portion of the elongate body, and an inner liner disposed within the elongate body, the inner liner defining a guidewire lumen in which the guidewire is disposed during the advancement of the catheter; rotating the elongate body and tissue-removing element of the catheter to remove the tissue; and detecting wear of the inner liner caused by the elongate body contacting the inner liner during use.

20 . A method of claim 19 , further comprising using a sensor arranged with respect to the elongate body and inner liner to detect wear of the inner liner, wherein the sensor comprises a first contact associated with the elongate body and a second contact associated with one of the guidewire and the inner liner, the first contact coming into electrical communication with the second contact indicating wear of the inner liner.

Assignees

• Medtronic Vascular Inc

Inventors

• Fleming Matthew
• Jamous Aram
• Kelly John
• Mcmullen Conor
• Meade Colin William
• Carroll Grainne Teresa

Classifications

• A61B2017/320052

  Guides for cutting instruments · CPC title

• A61B2017/320775

  Morcellators, impeller or propeller like means · CPC title

• A61B2017/00738

  part of the tool being offset with respect to a main axis, e.g. for better view for the surgeon · CPC title

• A61M25/0082

  Catheter tip comprising a tool · CPC title

• A61B2017/00845

  of moving parts with respect to each other · CPC title