Bone treatment systems and methods

Patent metadata

Field	Value
Publication number	US-11678922-B2
Application number	US-202016799638-A
Country	US
Kind code	B2
Filing date	Feb 24, 2020
Priority date	Aug 22, 2014
Publication date	Jun 20, 2023
Grant date	Jun 20, 2023

Abstract

A system for delivering bone cement into a bone is provided. The system can include a hydraulic system actuatable to deliver a bone cement mixture from a bone cement container, through a cannula and into a bone. The hydraulic system can have more than one pressure relief mechanism for decreasing pressure in the hydraulic system to cease delivery (e.g., substantially instantaneously) of the bone cement into the bone.

First claim

What is claimed is:

1. A method for injecting bone cement into a bone, comprising:
inserting at least a distal portion of a cannula percutaneously into a bone;
manually actuating a master-slave hydraulic assembly to deliver a bone cement mixture from a bone cement container through the cannula and into the bone; and
manually actuating a pressure release mechanism of the hydraulic assembly to reduce pressure in the master-slave hydraulic assembly to cease delivery of bone cement from the cannula substantially instantaneously,
wherein the master-slave hydraulic assembly comprises:
a distal hydraulic fluid container removably coupled to a proximal end of the bone cement container;
a slave piston having a proximal end disposed and slidably movable in the distal hydraulic fluid container and a distal end disposed and slidably movable in the bone cement container, the distal end of the slave piston and a distal end of the bone cement container defining a first chamber configured to hold the bone cement mixture therein and the proximal end of the slave piston and proximal end of the distal hydraulic fluid container defining a second chamber configured to hold a hydraulic fluid therein; and
a hydraulic line operably coupled to the proximal end of the distal hydraulic fluid container via a 3-way stopcock valve selectively actuatable to fluidly communicate the hydraulic line with the second chamber or isolate the hydraulic line from the second chamber.

2. The method of claim 1 , wherein actuating the pressure release mechanism comprises actuating one or both of a) a bypass valve that causes a decrease of pressure in the hydraulic assembly and causes a slave piston to move proximally within the bone cement container or b) actuating an actuator operably coupled to the master-slave hydraulic assembly to decrease pressure in the hydraulic assembly in a non-incremental manner to cause the slave piston to move proximally.

3. The method of claim 1 , wherein the master-slave hydraulic assembly further comprises:
a proximal hydraulic fluid container removably coupled to and in fluid communication with a proximal end of the hydraulic line, the proximal hydraulic fluid container defining a third chamber configured to hold the hydraulic fluid therein; and
an actuator movably coupled to the proximal hydraulic fluid container, the actuator having a master piston and a control mechanism selectively actuatable to move the master piston incrementally within the third chamber or to slidably move the master piston within the third chamber,
wherein actuation of the actuator to move the master piston distally in the third chamber causes hydraulic fluid to flow from the third chamber to the second chamber, causing the slave piston to move distally to eject bone cement from the first chamber, through the cannula and into the bone.

4. The method of claim 3 , wherein actuation of the actuator to move the master piston distally in the third chamber causes hydraulic fluid to flow from the third chamber to the second chamber when the stopcock valve is positioned to fluidly communicate the hydraulic line with the second chamber.

5. The method of claim 3 , wherein the actuator comprises a shaft having a surface with a plurality of teeth along a length of the shaft, the teeth configured to engage a threaded bore in a proximal portion of the proximal hydraulic fluid container, wherein the teeth are movable by the control mechanism between a first position where they engage the threaded bore to allow incremental movement of the master piston in the third chamber and a second position where they do not engage the threaded bore to allow non-incremental free sliding movement of the master piston in the third chamber.

6. The method of claim 5 , wherein in the first position the master piston is incrementally moved in the third chamber upon rotation of the control mechanism, and wherein in the second position the master piston is freely slid within the third chamber upon translation of the control mechanism.

7. The method of claim 5 , wherein the control mechanism comprises a ratchet and a pawl.

8. The method of claim 7 , wherein in the first position the pawl engages the ratchet to permit incremental changes in pressure upon translation of the control mechanism, and wherein in the second position the pawl disengages the ratchet to permit greater than the incremental changes in pressure upon translation of the control mechanism.

9. The method of claim 7 , wherein in the first position the pawl engages the ratchet to permit only incremental increases in pressure in the second chamber.

10. A method for injecting bone cement into a bone, comprising:
inserting at least a distal portion of a cannula percutaneously into a bone;
actuating a master-slave hydraulic assembly to deliver a bone cement mixture from a bone cement container through the cannula and into the bone; and
actuating a pressure release mechanism of the hydraulic assembly to reduce pressure in the master-slave hydraulic assembly to cease delivery of bone cement from the cannula substantially instantaneously,
wherein actuating the pressure release mechanism comprises actuating one or both of a) a bypass valve that causes a decrease of pressure in the hydraulic assembly and causes a slave piston to move proximally within the bone cement container or b) actuating an actuator operably coupled to the master-slave hydraulic assembly to decrease pressure in the hydraulic assembly in a non-incremental manner to cause the slave piston to move proximally,
wherein the master-slave hydraulic assembly comprises:
a distal hydraulic fluid container removably coupled to a proximal end of the bone cement container, the slave piston having a proximal end disposed and slidably movable in the distal hydraulic fluid container and a distal end disposed and slidably movable in the bone cement container, the distal end of the slave piston and a distal end of the bone cement container defining a first chamber configured to hold the bone cement mixture therein and the proximal end of the slave piston and proximal end of the distal hydraulic fluid container defining a second chamber configured to hold a hydraulic fluid therein; and
a hydraulic line operably coupled to the proximal end of the distal hydraulic fluid container via the bypass valve selectively actuatable to fluidly communicate the hydraulic line with the second chamber or isolate the hydraulic line from the second chamber.

11. The method of claim 10 , wherein the master-slave hydraulic assembly further comprises:
a proximal hydraulic fluid container removably coupled to and in fluid communication with a proximal end of the hydraulic line, the proximal hydraulic fluid container defining a third chamber configured to hold the hydraulic fluid therein, the actuator movably coupled to the proximal hydraulic fluid container, the actuator having a master piston and a control mechanism selectively actuatable to move the master piston incrementally within the third chamber or to slidably move the master piston within the third chamber,
wherein actuation of the actuator to move the master piston distally in the third chamber causes hydraulic fluid to flow from the third chamber to the second chamber, causing the slave piston to move distally to eject bone cement from the first chamber, through the cannula and into the bone.

12. The method of claim 11 , wherein actuation of the actuator to move the master piston distally in the third chamber causes hydraulic fluid to flow from the third chamber to the second chamber when the bypass valve is positioned to fluidly communicate the hydraulic line with the second chamber.

Assignees

• Dfine Inc

Inventors

• Balbierz Daniel J
• Wong Eric K

Classifications

• A61B2017/00539

  hydraulically · CPC title

• A61B17/8805

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

• A61B17/8816

  characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections · CPC title

• A61B17/8819

  characterised by the introducer proximal part, e.g. cannula handle, or by parts which are inserted inside each other, e.g. stylet and cannula (A61B17/8825 takes precedence) · CPC title

• A61B17/8822 Primary

  characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum · CPC title