Retractable inflatable bone tamp

Patent metadata

Field	Value
Publication number	US-12016605-B2
Application number	US-202117230389-A
Country	US
Kind code	B2
Filing date	Apr 14, 2021
Priority date	Apr 8, 2011
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

An inflatable bone tamp for performing a minimally invasive surgical procedure includes an outer shaft defining an internal lumen, an inflatable structure coupled to the outer shaft, and an inner shaft movably disposed within the internal lumen and coupled to a distal end region of the inflatable structure. The internal lumen is sized to receive the inflatable structure, such that by moving the inner shaft relative to the outer shaft, the inflatable structure can be retracted into the internal lumen (and likewise can be extended from within the internal lumen for deployment in bone). This retraction capability can beneficially protect the inflatable structure during positioning/removal, and can also enhance recovery from radial tears of the inflatable structure.

First claim

The invention claimed is:

1. A method comprising:
establishing an access path to a bone;
moving a balloon of a device through the access path to position the balloon adjacent to the bone;
moving a shaft of the device relative to a sleeve of the device to move the balloon into the bone;
inflating the balloon to manipulate the bone;
deflating the balloon; and
retracting the balloon into the sleeve,
wherein the balloon comprises a first end coupled to a distal end of the sleeve and an opposite second end coupled to a distal end of the shaft, and
wherein the device has a maximum length defined by a distance from a proximal end of the shaft to the distal end of the shaft.

2. The method recited in claim 1 , wherein the device comprises a controller configured to move the shaft relative to the sleeve to move the balloon between an extended position in which at least a portion of the balloon is positioned outside of the sleeve and a retracted position in which the balloon is positioned entirely within the sleeve.

3. The method recited in claim 2 , wherein the controller comprises rotary driver elements, the shaft being positioned between the rotary driver elements such that the shaft spaces outer surfaces of the rotary driver elements apart from one another as the rotary driver elements rotate.

4. The method recited in claim 2 , wherein the retraction controller is configured to itself rotate to rotate the shaft such that the balloon wraps around the shaft.

5. The method recited in claim 2 , wherein the controller comprises rotary driver elements, the shaft being positioned between the rotary driver elements such that the shaft spaces outer surfaces of the rotary driver elements apart from one another as the rotary driver elements rotate.

6. The method recited in claim 2 , wherein the controller comprises a lock configured to fix a relative position between the shaft and the sleeve.

7. The method recited in claim 1 , wherein the balloon comprises a first end coupled to a distal end of the sleeve and an opposite second end coupled to a distal end of the shaft, the distal end of the shaft being closed.

8. The method recited in claim 1 , wherein the bone is cancellous bone.

9. The method recited in claim 1 , wherein the bone is a collapsed vertebra.

10. The method recited in claim 1 , further comprising docking a cannula to the bone and inserting the device through the cannula.

11. The method recited in claim 1 , wherein:
the balloon is partially inflated when the balloon is moved into the bone; and
inflating the balloon to manipulate the bone comprises further inflating the balloon.

12. The method recited in claim 1 , wherein the balloon is positioned entirely within the sleeve as the balloon moves through the access path and as the sleeve is withdrawn from the access path.

13. The method recited in claim 1 , wherein:
the balloon comprises a first end coupled to a distal end of the sleeve and an opposite second end coupled to a distal end of the shaft; and
the access path is created using a boring feature of the distal end of the shaft.

14. The method recited in claim 1 , wherein the access path is created using a boring feature of a distal end of the balloon.

15. The method recited in claim 1 , wherein the bone is a vertebra and manipulating the bone comprises moving first and second endplate of the vertebra apart.

16. The method recited in claim 1 , wherein:
manipulating the bone comprises creating a cavity in the bone; and
the method further comprises filling the cavity with bone cement.

17. The method recited in claim 1 , wherein the distal end of the shaft is closed.

18. The method recited in claim 1 , wherein the shaft comprises a stop having a diameter larger than a diameter of a passageway of the sleeve to limit extension of the shaft relative to the sleeve.

19. A method comprising:
establishing an access path to a vertebra;
moving a cannula through the access path to position an end of the cannula adjacent to the vertebra;
moving a balloon of a device through the cannula with the balloon positioned entirely within a sleeve of the device until the balloon is positioned adjacent to the vertebra;
moving a shaft of the device relative to the sleeve to position the balloon within the vertebra;
inflating the balloon to create a cavity in the vertebra;
deflating the balloon;
retracting the balloon into the sleeve such that the balloon is positioned entirely within the sleeve; and
filling the cavity with bone cement,
wherein the balloon comprises a first end coupled to a distal end of the sleeve and an opposite second end coupled to a distal end of the shaft,
wherein the device has a maximum length defined by a distance from a proximal end of the shaft to the distal end of the shaft, and
wherein the device comprises a controller configured to move the shaft relative to the sleeve to move the balloon between an extended position in which at least a portion of the balloon is positioned outside of the sleeve and a retracted position in which the balloon is positioned entirely within the sleeve.

20. A method comprising:
establishing an access path to a vertebra;
moving a cannula through the access path to position an end of the cannula adjacent to the vertebra;
moving a balloon of a device through the cannula with the balloon positioned entirely within a sleeve of the device until the balloon is positioned adjacent to the vertebra;
moving a shaft of the device relative to the sleeve to position the balloon within the vertebra;
inflating the balloon to create a cavity in the vertebra;
deflating the balloon;
retracting the balloon into the sleeve such that the balloon is positioned entirely within the sleeve; and
filling the cavity with bone cement,
wherein the balloon comprises a first end coupled to a distal end of the sleeve and an opposite second end coupled to a distal end of the shaft, the distal end of the shaft being closed,
wherein the device has a maximum length defined by a distance from a proximal end of the shaft to the distal end of the shaft,
wherein the device comprises a controller configured to move the shaft relative to the sleeve to move the balloon between an extended position in which at least a portion of the balloon is positioned outside of the sleeve and a retracted position in which the balloon is positioned entirely within the sleeve,
wherein the controller comprises rotary driver elements, the shaft being positioned between the rotary driver elements such that the shaft spaces outer surfaces of the rotary driver elements apart from one another as the rotary driver elements rotate, and
wherein the retraction controller is configured to itself rotate to rotate the shaft such that the balloon wraps around the shaft.

Assignees

• Medtronic Holding Co Sarl

Inventors

• Druma Calin
• Chabansky Bruce

Classifications

• A61B17/8805

  for introducing fluid filler into bone or extracting it (A61B17/7097, A61B17/8833 take precedence) · CPC title

• A61M25/0119

  Eversible catheters · CPC title

• A61B17/8855 Primary

  inflatable, e.g. kyphoplasty balloons · CPC title