Inflatable bone tamp with flow control and methods of use

Patent metadata

Field	Value
Publication number	US-10993755-B2
Application number	US-201916353412-A
Country	US
Kind code	B2
Filing date	Mar 14, 2019
Priority date	Apr 26, 2016
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

An inflatable bone tamp is provided that includes a shaft with proximal and distal portions and a central longitudinal axis. A balloon is attached to the shaft such that a material can flow through the shaft and into the balloon to inflate the balloon. A flow controller controls the flow of the material through the shaft and into the balloon. Kits, systems and methods are disclosed.

First claim

What is claimed is:

1. An inflatable bone tamp comprising:
a first shaft extending along a central longitudinal axis between a first proximal portion and an opposite first distal portion, the first shaft including an inner surface and an outer surface, the inner surface defining a lumen extending therethrough, and the first distal portion including at least one aperture therethrough;
a second shaft extending between a second proximal portion and an opposite second distal portion, the second shaft including an inner surface, the first shaft being received inside the second shaft, and the outer surface of the first shaft and the inner surface of the second shaft defining a passageway extending through the second shaft;
an inflatable balloon having an interior, a distal end coupled to the first distal portion of the first shaft and a proximal end coupled to the second distal portion of the second shaft such that a material can flow through the second shaft and into the balloon to inflate the balloon; and
a plurality of flow controllers coupled to one of the outer surface of the first shaft and the inner surface of the second shaft inside the passageway that controls the flow of the material through the passageway and into the balloon, each of the plurality of flow controllers protruding into the passageway and being spaced apart from one another about a circumference of a corresponding one of the outer surface of the first shaft and the inner surface of the second shaft, a first of the plurality of flow controllers positioned at a first circumferential position, a second of the plurality of flow controllers positioned at a second circumferential position, a third of the plurality of flow controllers positioned at a third circumferential position, and a fourth of the plurality of flow controllers positioned at a fourth circumferential position, the first circumferential position being adjacent the second circumferential position, the second circumferential position being adjacent the third circumferential position, the third circumferential position being adjacent the fourth circumferential position, and the fourth circumferential position being adjacent the first circumferential position, the first circumferential position being opposite from the third circumferential position, and the second circumferential position being opposite from the fourth circumferential position, each of the plurality of flow controllers including at least a first lateral surface, a second lateral surface, and an inward-facing surface extending between the first lateral surface and the second lateral surface;
wherein the passageway between the first shaft and the second shaft fluidly communicates with the interior of the balloon, and the interior of the balloon fluidly communicates with the lumen of the first shaft through the at least one aperture; and
wherein material injected into the passageway moves through the passageway, between the inward-facing surfaces of the plurality of flow controllers and a corresponding opposite one of the outer surface of the first shaft and the inner surface of the second shaft, and between the first lateral surfaces and the second lateral surfaces of adjacent ones of the plurality of flow controllers, and fills the interior of the balloon to facilitate inflation thereof, and the material exits the interior of the balloon through the at least one aperture, and moves through the lumen to facilitate deflation of the balloon.

2. The inflatable bone tamp of claim 1 , wherein the first lateral surfaces, the second lateral surfaces, and the inward-facing surfaces of each of the first, the second, the third, and the fourth of the plurality of flow controllers at least in part reside in corresponding planes that are parallel to the central longitudinal axis.

3. The inflatable bone tamp of claim 1 , wherein the inward-facing surfaces of the first, the second, the third, and the fourth of the plurality of flow controllers are concave.

4. The inflatable bone tamp of claim 1 , further comprising another plurality of flow controllers spaced axially apart from the plurality of flow controllers relative to the central longitudinal axis, each of the another plurality of flow controllers protruding into the passageway and being spaced apart from one another about a circumference of one of the outer surface of the first shaft and the inner surface of the second shaft.

5. The inflatable bone tamp of claim 4 , wherein a first of the another plurality of flow controllers positioned at a first circumferential position, a second of the another plurality of flow controllers positioned at a second circumferential position, a third of the another plurality of flow controllers positioned at a third circumferential position, and a fourth of the another plurality of flow controllers positioned at a fourth circumferential position, each of the another plurality of flow controllers including at least a first lateral surface, a second lateral surface, and an inward-facing surface extending between the first lateral surface and the second lateral surface.

6. The inflatable bone tamp of claim 1 , wherein each of the plurality of flow controllers is comprised of discrete strips coupled along the one of the outer surface of the first shaft and the inner surface of the second shaft parallel to the central longitudinal axis.

7. The inflatable bone tamp of claim 1 , wherein the lumen is tapered from the first proximal portion to a midpoint of the lumen and from the midpoint of the lumen to the first distal portion.

8. The inflatable bone tamp of claim 1 , further comprising an end portion connected to the first proximal portion of the first shaft and connected to the second proximal portion of the second shaft, the end portion including a first port communicating with the passageway and a second port communicating with the lumen.

9. The inflatable bone tamp of claim 1 , wherein the bone tamp includes a proximal end and an opposite distal end, the balloon being positioned at and adjacent the distal end of the bone tamp, and the plurality of flow controllers being positioned adjacent the proximal end of the bone tamp.

10. The inflatable bone tamp of claim 9 , wherein another plurality of flow controllers is positioned adjacent the distal end of the bone tamp.

11. An inflatable bone tamp comprising:
an outer shaft extending along a central longitudinal axis between opposite proximal end and distal end portions, the outer shaft including an inner surface;
an inner shaft positioned within the outer shaft and extending between opposite proximal end and distal end portions, the inner shaft having an inner surface and an outer surface, and the distal end portion of the inner shaft comprising apertures;
a passageway formed between the outer surface of the inner shaft and the inner surface of the outer shaft, and a lumen formed by the inner surface of the inner shaft;
a balloon having a distal end coupled to the distal end portion of the inner shaft and a proximal end coupled to the distal end portion of the outer shaft, the balloon having an interior communicating with the passageway and the lumen, the interior of the balloon communicating with the lumen via the apertures in the distal end portion of the inner shaft; and
a plurality of flow controllers coupled to one of the outer surface of the inner shaft and the inner surface of the outer shaft within the passageway, each of the plurality of flow controllers being spaced apart from one another about a circumference of a corresponding one of the outer surface of the inner shaft and the inner surface of the outer shaft, and each of the plurality of flow controllers protruding into the passageway an

Assignees

• Medtronic Holding Co Sarl

Inventors

• Druma Calin
• Kar Shankar

Classifications

• A61B17/8855 Primary

  inflatable, e.g. kyphoplasty balloons · CPC title

• A61B17/885

  Tools for expanding or compacting bones or discs or cavities therein (A61B17/8805, A61B17/7097 take precedence) · CPC title

• A61B17/8827

  with filtering, degassing, venting or pressure relief means · CPC title