Expandable device and methods of use

Patent metadata

Field	Value
Publication number	US-9936993-B2
Application number	US-201615155533-A
Country	US
Kind code	B2
Filing date	May 16, 2016
Priority date	Jan 25, 2013
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A surgical system including an expandable device is provided, including an inflatable body, an inner shaft and an outer shaft. The inflatable body has at least one folded segment, which are housed in a distal portion of the outer shaft. The inflatable body is tethered to a portion of the outer shaft. The inner shaft is affixed to a portion of the inflatable body, and is configured to control an axial and/or a radial inflation pattern of the folded inflatable body.

First claim

What is claimed is:

1. A method comprising:
inflating a balloon of an expandable device such that the balloon expands in an axial direction, the balloon having a proximal portion coupled to an outer shaft and a distal portion coupled to an inner shaft, the inner shaft being free-floating within the outer shaft such that the inner shaft is free of any connection to the outer shaft, the inner shaft having a closed distal end;
preventing movement of the inner shaft relative to the outer shaft; and
further inflating the balloon such that the balloon expands in a radial direction.

2. A method as recited in claim 1 , wherein preventing movement of the inner shaft relative to the outer shaft comprises locking the inner shaft in a position within the expandable device to stop the balloon from further expansion in the axial direction.

3. A method as recited in claim 1 , wherein inflating the balloon such that the balloon expands in the axial direction flattens an axially folded segment of the balloon.

4. A method as recited in claim 1 , further comprising inserting the expandable device into a bone before inflating the balloon such that the balloon expands in the axial direction.

5. A method as recited in claim 4 , wherein further inflating the balloon such that the balloon expands in the radial direction creates a void in the bone.

6. A method as recited in claim 4 , further comprising: deflating the balloon and removing the expandable device from the bone; and inserting a bone void filler into the void.

7. A method as recited in claim 1 , wherein the balloon is positioned within the outer shaft before the balloon expands in the axial direction.

8. A method as recited in claim 1 , wherein the outer shaft comprises a rigid material.

9. A method as recited in claim 1 , wherein the outer shaft comprises a rigid material.

10. A method as recited in claim 1 , wherein the balloon comprises a compliant material.

11. A method comprising:
inflating a balloon of an expandable device such that the balloon expands in an axial direction, the balloon having a proximal portion coupled to an outer shaft and a distal portion coupled to an inner shaft, the outer shaft comprising a housing portion and a tubular portion, the housing portion having a larger diameter than the tubular portion, the outer shaft being tapered from the housing portion to the tubular portion, the inner shaft being free-floating within the outer shaft such that the inner shaft is free of any connection to the outer shaft;
preventing movement of the inner shaft relative to the outer shaft; and
further inflating the balloon such that the balloon expands in a radial direction.

12. A method as recited in claim 11 , wherein preventing movement of the inner shaft relative to the outer shaft comprises locking the inner shaft in a position within the expandable device to stop the balloon from further expansion in the axial direction.

13. A method as recited in claim 11 , wherein inflating the balloon such that the balloon expands in the axial direction flattens an axially folded segment of the balloon.

14. A method as recited in claim 11 , further comprising inserting the expandable device into a bone before inflating the balloon such that the balloon expands in the axial direction.

15. A method as recited in claim 14 , wherein further inflating the balloon such that the balloon expands in the radial direction creates a void in the bone.

16. A method as recited in claim 14 , further comprising: deflating the balloon and removing the expandable device from the bone; and inserting a bone void filler into the void.

17. A method as recited in claim 11 , wherein the balloon is positioned within the outer shaft before the balloon expands in the axial direction.

18. A method as recited in claim 11 , wherein the proximal portion is tethered to an inner surface of the housing portion.

19. A method as recited in claim 11 , wherein the inner shaft has a closed distal end.

20. A method comprising:
inserting an expandable device into a bone;
inflating a balloon of the expandable device such that the balloon expands in an axial direction, the balloon having a proximal portion coupled to an outer shaft and a distal portion coupled to an inner shaft, the inner shaft being free-floating within the outer shaft such that the inner shaft is free of any connection to the outer shaft, the outer shaft comprising a housing portion and a tubular portion, the housing portion having a larger diameter than the tubular portion, the outer shaft being tapered from the housing portion to the tubular portion;
preventing movement of the inner shaft relative to the outer shaft; and
further inflating the balloon such that the balloon expands in a radial direction and creates a void in the bone;
deflating the balloon and removing the expandable device from the bone; and
inserting a bone void filler into the void.

Assignees

• Kyphon Sarl
• Kyphon Sarl

Inventors

• Druma Calin

Classifications

• A61B17/8802

  Equipment for handling bone cement or other fluid fillers · CPC title

• A61B17/8858

  laterally or radially expansible (inflatable A61B17/8855) · CPC title

• A61B17/8855 Primary

  inflatable, e.g. kyphoplasty balloons · CPC title