Bone tamp and methods of use

• US 8,728,081 B2
• Filed: 04/29/2011
• Issued: 05/20/2014
• Est. Priority Date: 04/29/2011
• Status: Active Grant

• Current Assignee: Kyphon SARL (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Lauchner, Craig E, Smith, Michael A.
• Primary Examiner(s): Woodall, Nicholas
• Assistant Examiner(s): Waggle, Jr., Larry E
• Application Number:
  US13/098,006
• Publication Number:
  US 20120277811A1
• Time in Patent Office: 1,117 Days
• Field of Search: 604 9901- 9903, 604/101.01, 604/101.05, 604/101.04, 604/264, 604/523, 604/99.04, 604/248, 606/86.R, 606191-192, 606/198
• US Class Current: 606/86.R
• CPC Class Codes: A61B 17/56 Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
• CPC Class Codes: A61B 17/885 Tools for expanding or compacting bones or discs or cavities therein A61B17/8805, A61B17/7097 take precedence
• CPC Class Codes: A61B 17/8852 capable of being assembled or enlarged, or changing shape, inside the bone or disc
• CPC Class Codes: A61B 17/8855 inflatable, e.g. kyphoplasty balloons
• CPC Class Codes: A61B 17/8858 laterally or radially expansible inflatable A61B17/8855
• CPC Class Codes: A61B 2017/564 Methods for bone or joint treatment

Abstract

A system comprises an inflatable bone tamp including a plurality of linearly aligned expandable bodies. The system further comprises an elongated tubular shaft extending through the plurality of linearly aligned expandable bodies. The elongated tubular shaft includes a shaft wall and an interior partition structure. The system further comprises a plurality of channels extending through the shaft, each of the channels formed by a segment of the shaft wall and the interior partition structure and each of the channels in communication with the respective one of the plurality of expandable bodies via openings in the shaft. Each of the expandable bodies is independently inflatable.

Claims

1. A system comprising:

an inflatable bone tamp including a plurality of linearly aligned expandable bodies;

an elongated tubular shaft extending through the plurality of linearly aligned expandable bodies, the elongated tubular shaft including a shaft wall that defines a lumen and an interior partition structure forming a plurality of channels within the lumen, the plurality of channels extending through the shaft, each of the channels formed by a segment of the shaft wall and the interior partition structure and each of the channels in communication with the respective one of the plurality of expandable bodies via openings in the shaft; and

a sleeve including an inflation port, the sleeve being rotatably coupled to the shaft such that the inflation port is switchable between positions in which the inflation port is in communication with a different one of the channels such that each of the expandable bodies is independently inflatable via the inflation port.

2. The system of claim 1 further comprising an inflation connector coupled to the inflation port.

3. The system of claim 1 wherein the interior partition structure has a Y-shaped cross-section.

4. The system of claim 1 wherein the plurality of linearly aligned expandable bodies includes first, second, and third linearly aligned expandable bodies.

5. The system of claim 4 wherein the second expandable body is formed of a different material than the first and third expandable bodies.

6. The system of claim 4 wherein the second expandable body is formed of a non-compliant material.

7. The system of claim 4 wherein the second expandable body is formed of a compliant material.

8. The system of claim 1 wherein the shaft defines a longitudinal axis and each of the channels includes an aperture configured to be in communication with the inflation port, the apertures each intersecting a single transverse axis that extends perpendicular to the longitudinal axis.

9. The system of claim 1 wherein at least one of the expandable bodies comprises an expandable region and end portions that turn inward toward the expandable region such that an outer surface of a respective expandable member engages an outer surface of the shaft.

10. A system comprising:

an inflatable bone tamp including first, second, and third linearly aligned expandable bodies, the bone tamp having a length of at least 30 mm;

an elongated tubular shaft extending through the first, second, and third expandable bodies, the elongated tubular shaft having an inner lumen, an interior partition structure forming a first, second and third channel within the lumen and a shaft wall, the first, second, and third channels extending through the shaft, each of the channels in communication with the respective first, second, and third expandable bodies via openings in the shaft wall; and

a sleeve including an inflation port, the sleeve being rotatably coupled to the shaft such that the inflation port is switchable between positions in which the inflation port is in communication with a different one of the channels such that each of the expandable bodies is independently inflatable via the inflation port.

11. The system of claim 10, wherein each of the channels is formed by a segment of the shaft wall and the partition structure.

12. The system of claim 10 wherein each of the channels includes a tube having a circular cross-section.