Tissue-removing catheter with guidewire detection sensor

Patent metadata

Field	Value
Publication number	US-11419628-B2
Application number	US-201916565043-A
Country	US
Kind code	B2
Filing date	Sep 9, 2019
Priority date	Sep 10, 2018
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

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. 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 elongate body. The tissue-removing element is configured to remove the tissue as the tissue-removing element is rotated by the elongate body within the body lumen. An inner liner is received within the elongate body and is coupled to the handle at a proximal end portion of the inner liner. The inner liner defines a guidewire lumen. A sensor is arranged with respect to the inner liner and is configured to produce a signal for indicating the presence of a guidewire within the inner liner.

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 portion of the inner liner, the inner liner defining a guidewire lumen; and
a sensor arranged with respect to the inner liner and configured to produce a signal for indicating the presence of a guidewire within the inner liner.

2. A tissue-removing catheter as set forth in claim 1 , wherein the sensor is located at a distal end portion of the inner liner.

3. A tissue-removing catheter as set forth in claim 2 , wherein the sensor comprises one of an optical, magnetic, and pressure sensor.

4. A tissue-removing catheter as set forth in claim 1 , wherein the sensor comprises a first sensor, the catheter further comprising a second sensor arranged with respect to the inner liner and configured to indicate the presence of a guidewire within the inner liner.

5. A tissue-removing catheter as set forth in claim 4 , wherein the first sensor comprises an emitter for emitting light and the second sensor comprises a detector for detecting the light emitted by the emitter, the detection of light by the detector providing an indication of whether a guidewire is present within the inner liner.

6. A tissue-removing catheter as set forth in claim 1 , wherein the sensor is attached to the inner liner.

7. A tissue-removing catheter as set forth in claim 6 , wherein the sensor is at least partially embedded in the inner liner.

8. A tissue-removing catheter as set forth in claim 6 , further comprising a marker band on the inner liner, wherein the sensor is attached to the marker band.

9. A tissue-removing catheter as set forth in claim 1 , wherein the sensor is attached to the tissue-removing element and electrically connected to the elongate body.

10. A tissue-removing catheter as set forth in claim 1 , wherein the inner liner comprises electrically conductive material, the sensor being connected to the electrically conductive material.

11. A tissue-removing catheter as set forth in claim 10 , wherein the electrically conductive material comprises a metal layer of the inner liner.

12. A tissue-removing catheter as set forth in claim 10 , wherein the electrically conductive material comprises electro-ink.

13. A tissue-removing catheter as set forth in claim 1 , further comprising a controller operatively connected to the sensor for receiving the signal from the sensor indicating whether a guidewire is present within the inner liner.

14. A tissue-removing catheter as set forth in claim 13 , wherein the controller is disposed in the handle.

15. A tissue-removing catheter as set forth in claim 13 , 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, the controller permitting the motor to rotate the elongate body when the signal from the sensor indicates that a guidewire is present within the inner liner and preventing the motor from rotating the elongate body when the signal from the sensor indicates that no guidewire is present within the inner liner.

16. A tissue-removing catheter as set forth in claim 15 , wherein the handle includes a guidewire lock configured to lock the guidewire in place relative to the handle, the controller automatically engaging the guidewire lock when the motor is activated for driving rotation of the elongate body and tissue-removing element.

17. 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 inner liner and configured to produce a signal for indicating the presence of a guidewire within the inner liner.

18. A tissue-removing catheter as set forth in claim 17 , wherein the sensor comprises one of an optical, magnetic, and pressure sensor.

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; and
detecting a position of the guidewire within the inner liner by a sensor arranged with respect to the inner liner.

20. A method of claim 19 , further comprising rotating the elongate body and tissue-removing element of the catheter to remove the tissue when the guidewire is detected at a distal end portion of the inner liner, and one of preventing or ceasing rotation of the elongate body and tissue-removing element when the guidewire is not detected at the distal end portion of the inner liner.

Assignees

• Medtronic Vascular Inc

Inventors

• Fleming Matthew
• Brosnan Ian

Classifications

• A61B2017/22038

  with a guide wire · CPC title

• A61B2017/22049

  Means for locking the guide wire in the catheter · CPC title

• A61M25/0136

  Handles therefor · CPC title

• A61B90/39

  Markers, e.g. radio-opaque or breast lesions markers · CPC title

• A61M25/09

  Guide wires · CPC title