Flexible introducer

Patent metadata

Field	Value
Publication number	US-10856904-B2
Application number	US-60662706-A
Country	US
Kind code	B2
Filing date	Nov 30, 2006
Priority date	Nov 30, 2006
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

An introducer for facilitating implantation of a therapy element into a patient defines a lumen configured to receive the therapy element. At least a portion of the introducer is configured to preferentially flex in at least a first direction over at least a second direction. That is, at least a portion of the introducer is predisposed to bend in a particular direction. In some embodiments, the introducer may also resist bending in one or more directions.

First claim

The invention claimed is:

1. An apparatus configured to facilitate implantation of a therapy element into tissue of a patient, the apparatus comprising:
a dilator; and
a sheath defining an inner lumen configured to interchangeably receive the dilator and the therapy element,
wherein a first portion of the dilator is configured to preferentially flex in at least a first direction over at least a second direction that is different from the first direction, wherein a second portion of the dilator is configured to preferentially flex in the second direction, the dilator being configured to allow the first portion to flex in at least the first direction and the second portion to flex in the second direction at a same time, and wherein a cross-sectional shape of at least one of the first portion or the second portion of the dilator comprises an oval shape having a major axis and a minor axis, the oval shape having a first outer dimension along the major axis and a second outer dimension along the minor axis, wherein the first dimension is larger than the second dimension, and the at least one of the first portion or the second portion of the dilator being configured to preferentially flex about the major axis due to the respective oval shape.

2. The apparatus of claim 1 , wherein the first portion of the dilator is configured to flex in the first direction to define a substantially curvilinear shape.

3. The apparatus of claim 1 , wherein the first portion of the dilator is configured to flex in the first direction to substantially conform to a transverse contour of a neck of the patient.

4. The apparatus of claim 1 , wherein when at least one of the first portion or the second portion of the dilator is in substantially non-flexed state, the at least one of the first portion or the second portion of the dilator is substantially axially aligned with a proximal end and a distal end of the dilator.

5. The apparatus of claim 1 , wherein at least one of the first portion or the second portion of the dilator comprises an inner wall that comprises a first section having a first thickness and a second section having a second thickness that is greater than the first thickness, wherein the at least one of the first portion or the second portion is configured to preferentially flex along the first section.

6. The apparatus of claim 1 , wherein the dilator comprises a proximal section and a distal section, at least one of the proximal or distal sections being inflexible, and at least one of the first portion or the second portion of the dilator being located between the proximal section and the distal section.

7. The apparatus of claim 1 , further comprising one or more markers disposed on the dilator to indicate the first direction.

8. The apparatus of claim 1 , further comprising one or more markers disposed on the sheath and configured to indicate a location of a distal end of the sheath relative to skin of the patient.

9. The apparatus of claim 1 , wherein the sheath comprises a flexible material.

10. The apparatus of claim 1 , wherein the therapy element comprises at least one of a lead body including one or more electrodes or a fluid delivery conduit.

11. The apparatus of claim 1 , wherein the dilator has a length in a range of approximately two centimeters to approximately forty centimeters.

12. The apparatus of claim 11 , wherein the dilator has a length in a range of approximately nine centimeters to approximately twenty centimeters.

13. The apparatus of claim 1 , wherein the inner lumen has a diameter in a range of approximately one millimeter to approximately ten millimeters.

14. The apparatus of claim 1 , wherein the dilator comprises a biocompatible material.

15. The apparatus of claim 1 , wherein at least one of the first portion or the second portion of the dilator comprises a plurality of grooves.

16. A kit configured to facilitate implantation of a therapy element into a patient, the kit comprising:
a dilator comprising a first interlocking member; and
a sheath defining an inner lumen configured to interchangeably receive the dilator and the therapy element, the sheath comprising a second interlocking member,
wherein the first interlocking member is configured to interlock with the second interlocking member when the dilator is fully inserted in the sheath, and
wherein a first portion of the dilator is configured to preferentially flex in a first direction over at least a second direction that is different from the first direction, wherein a second portion of the dilator is configured to preferentially flex in the second direction, the dilator being configured to allow the first portion to flex in the first direction and the second portion to flex in the second direction at a same time, wherein a cross-sectional shape of at least one of the first portion or the second portion comprises an oval shape having a major axis and a minor axis, the oval shape having a first outer dimension along the major axis and a second outer dimension along the minor axis, wherein the first dimension is larger than the second dimension, and the at least one of the first portion or the second portion of the dilator being configured to preferentially flex about the major axis due to the respective oval shape.

17. The kit of claim 16 , wherein the first portion of the dilator is configured to flex in the first direction to substantially conform to a transverse contour of a neck of the patient.

18. The kit of claim 16 , wherein at least one of the first portion or the second portion of the dilator comprises a plurality of grooves.

19. The kit of claim 16 , wherein at least one of the first portion or the second portion of the dilator comprises an inner wall comprising a first section having a first thickness and a second section having a second thickness that is greater than the first thickness.

20. A method comprising:
inserting an introducer into a patient, the introducer comprising:
a dilator; and
a sheath defining a lumen configured to interchangeably receive a therapy element and the dilator,
wherein a first portion of the dilator is configured to preferentially flex in at least a first direction over at least a second direction that is different from the first direction, and wherein a second portion of the dilator is configured to preferentially flex in the second direction, the dilator being configured to allow the first portion to flex in at least the first direction and the second portion to flex in the second direction at a same time, wherein a cross-sectional shape of the at least one of the first portion or the second portion of the dilator comprises an oval shape having a major axis and a minor axis, the oval shape having a first outer dimension along the major axis and a second outer dimension along the minor axis, wherein the first dimension is larger than the second dimension, and the at least one of the first portion or the second portion of the dilator being configured to preferentially flex about the major axis due to the respective oval shape;

advancing the introducer to a target tissue site within the patient; and
manipulating the first portion of the dilator to flex in the first direction substantially about the major axis.

21. The method of claim 20 , further comprising introducing the therapy element into the lumen of the introducer.

22. The method of claim 21 , wherein the therapy element comprises at least one of a lead body comprising one or more electrodes or a fluid delive

Assignees

• Gerber Martin T
• Medtronic Inc

Inventors

• Gerber Martin T

Classifications

• A61M25/0662

  Guide tubes · CPC title

• A61N1/0558

  Anchoring or fixation means therefor · CPC title

• A61B17/3401

  Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia · CPC title

• A61B2017/00292

  mounted on or guided by flexible, e.g. catheter-like, means · CPC title

• A61B17/3421

  Cannulas · CPC title