Inflatable bone tamp and method for use of inflatable bone tamp

Patent metadata

Field	Value
Publication number	US-11484355-B2
Application number	US-202016806307-A
Country	US
Kind code	B2
Filing date	Mar 2, 2020
Priority date	Mar 2, 2020
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

An inflatable bone tamp including a first balloon portion and a second balloon portion is provided. Each of the first balloon portion and the second balloon portion include interior cavities that can be filled with liquid, and these interior cavities communicate with one another via a valve. The valve can limit or restrict flow of the liquid between the cavities. As such, the first balloon portion and the second balloon portion can be sequentially inflated with the liquid through use of the valve.

First claim

What is claimed is:

1. An inflatable bone tamp comprising:
an inner first tubular portion including a first passageway therethrough, and extending between a first proximal end and an opposite first distal end, the inner first tubular portion including at least one aperture adjacent the first distal end;
an outer second tubular portion including a second passageway therethrough, and extending between a second proximal end and an opposite second distal end, the inner first tubular portion extending through the second passageway;
a valve including an outer surface, a first side, an opposite second side, an aperture extending between the first side and the second side, and various perforations extending between the first side and the second side, the inner first tubular portion being received through the aperture;
a first balloon portion including a first cavity, a first distal end portion, and a first proximal end portion, the first distal end portion being attached relative to the inner first tubular portion, and the first proximal end portion being attached relative to the outer surface of the valve; and
a second balloon portion including a second cavity, a second distal end portion, and a second proximal end portion, the second distal end portion being attached relative to the outer surface of the valve, and the second proximal end portion being attached relative to the outer second tubular portion;
wherein the first cavity and the second cavity communicate with one another via the various perforations in the valve,
wherein a liquid pumped through the first passageway can enter the first cavity via the at least one aperture of the inner first tubular portion and can expand the first balloon portion from a first contracted position to a first expanded position,
wherein the valve limits passage of the liquid from the first cavity to the second cavity through the various perforations until a threshold pressure of the liquid is reached in the first cavity, and
wherein the fluid entering the second cavity via the various perforations in the valve can expand the second balloon portion from a second contracted position to a second expanded position.

2. The inflatable bone tamp of claim 1 , wherein the threshold pressure can range from 50 to 300 psi.

3. The inflatable bone tamp of claim 1 , wherein the various perforations are each formed by a first opening in the first side of the valve, a second opening in the second side of the valve, and a pathway extending between the first opening and the second opening.

4. The inflatable bone tamp of claim 3 , wherein the first opening is larger than the second opening, and the pathway is tapered between the first opening and the second opening.

5. The inflatable bone tamp of claim 3 , wherein the pathway has a convoluted path between the first opening and the second opening.

6. The inflatable bone tamp of claim 1 , wherein the valve is made from foam, and the various perforations are formed through an open cell structure of the foam.

7. The inflatable bone tamp of claim 1 , wherein each of the first balloon portion and the second balloon portion have toroidal shapes surrounding portions of the inner first tubular portion.

8. The inflatable bone tamp of claim 1 , wherein a first fluid-tight seal is formed between the first distal end portion of the first balloon portion and the inner first tubular portion, a second fluid-tight seal is formed between the first proximal end portion of the first balloon portion and the outer surface of the valve, a third fluid-tight seal is formed between the second distal end portion of the second balloon portion and the outer surface of the valve, and a fourth fluid-tight seal is formed between the second proximal end portion and the outer second tubular portion.

9. An inflatable bone tamp comprising:
an outer first tubular portion including a first passageway therethrough, and extending between a first proximal end and an opposite first distal end;
an inner second tubular portion including a second passageway therethrough, and extending between a second proximal end and an opposite second distal end, the inner second tubular portion extending through the first passageway, and the inner second tubular portion including at least one aperture adjacent the first distal end;
a valve including an outer surface, a first side, an opposite second side, an aperture extending between the first side and the second side, and various perforations extending between the first side and the second side, the inner second tubular portion being received through the aperture;
a first balloon portion including a first cavity, a first proximal end portion, and a first distal end portion, the first proximal end portion being attached relative to the outer first tubular portion, and the first distal end portion being attached relative to the outer surface of the valve; and
a second balloon portion including a second cavity, a second proximal end portion, and a second distal end portion, the second proximal end portion being attached relative to the outer surface of the valve, and the second distal end portion being attached relative to the inner second tubular portion;
wherein the first cavity and the second cavity communicate with one another via the various perforations in the valve,
wherein a liquid pumped through the first passageway can enter the first cavity and can expand the first balloon portion from a first contracted position to a first expanded position,
wherein the valve limits passage of the liquid from the first cavity to the second cavity through the various perforations until a threshold pressure of the liquid is reached in the first cavity, and
wherein the fluid entering the second cavity via the various perforations in the valve can expand the second balloon portion from a second contracted position to a second expanded position.

10. The inflatable bone tamp of claim 9 , wherein the threshold pressure can range from 50 to 300 psi.

11. The inflatable bone tamp of claim 9 , wherein the various perforations are each formed by a first opening in the first side of the valve, a second opening in the second side of the valve, and a pathway extending between the first opening and the second opening.

12. The inflatable bone tamp of claim 11 , wherein the first opening is larger than the second opening, and the pathway is tapered between the first opening and the second opening.

13. The inflatable bone tamp of claim 11 , wherein the pathway has a convoluted path between the first opening and the second opening.

14. The inflatable bone tamp of claim 9 , wherein the valve is made from foam, and the various perforations are formed through an open cell structure of the foam.

15. The inflatable bone tamp of claim 9 , wherein each of the first balloon portion and the second balloon portion have toroidal shapes surrounding portions of the inner first tubular portion.

16. The inflatable bone tamp of claim 9 , wherein a first fluid-tight seal is formed between the first proximal end portion of the first balloon portion and the outer first tubular portion, a second fluid-tight seal is formed between the first distal end portion of the first balloon portion and the outer surface of the valve, a third fluid-tight seal is formed between the second proximal end portion of the second balloon portion and the outer surface of the valve, and a fourth fluid-tight seal is formed between the second distal end portion and the inner second tubular portion.

17. An inflatable bone tamp comprising:
an inner first tubular portion including a firs

Assignees

• Medtronic Holding Co Sarl

Inventors

• Druma Calin
• Sharma Asha

Classifications

• A61B17/8855 Primary

  inflatable, e.g. kyphoplasty balloons · CPC title

• A61B17/1604

  Chisels; Rongeurs; Punches; Stamps · CPC title

• A61B2017/00557

  inflatable (A61B2017/22051 takes precedence) · CPC title