Cement mixing and injection system and methods

Patent metadata

Field	Value
Publication number	US-11304739-B2
Application number	US-201816053011-A
Country	US
Kind code	B2
Filing date	Aug 2, 2018
Priority date	Aug 3, 2017
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

The present disclosure relates to systems and methods for mixing and injecting fluid treatment, such as cement to treat bone or hard tissue. In some embodiments, a mixing apparatus may facilitate mixing within a syringe. Additionally, the syringe may be configured to extract bone cement from a cement mixer. A syringe for mixing and injecting cement may include a detachable handle that may be detached after extracting bone cement from a mixer to facilitate coupling to a high-pressure syringe for injection.

First claim

We claim:

1. A system for mixing and delivering a fluid treatment to a patient, the system comprising:
a mixer to mix the fluid treatment prior to delivery, the mixer comprising:
a mixing chamber; and
a port to facilitate access to the mixing chamber;

a syringe to extract the fluid treatment from the mixer and deliver the extracted fluid treatment to a patient, the syringe comprising:
a barrel to hold the fluid treatment, the barrel including a distal nose to interface with the port;
a plunger within the barrel to displace the fluid treatment;
a handle selectively coupled to the plunger to facilitate plunger movement; and
a retainer removeably attachable to a proximal end of the barrel, wherein the retainer engages the plunger when the plunger is positioned at the proximal end and prevents the plunger from rotating relative to the barrel; and

a pressure delivery device to selectively couple to the syringe when the handle is removed from the plunger, wherein the pressure delivery device pressurizes the syringe to facilitate plunger movement,
wherein the retainer comprises a socket with a mating surface corresponding to a mating proximal portion of the plunger, and
wherein the mating surface of the socket engages with the mating proximal portion of the plunger to prevent rotational movement of the plunger relative to the barrel.

2. The system of claim 1 , wherein the mixer further comprises a paddle within the mixing chamber coupled to a handle exterior of the mixing chamber, wherein a rotation of the handle of the mixer causes the paddle to stir bone cement powder and a liquid monomer within the mixing chamber.

3. The system of claim 1 , wherein the mixer further comprises a floor configured to selectively move from a first position to a second position, wherein when in the first position the floor seals the port, and when in the second position the port is open.

4. The system of claim 1 , wherein the handle comprises a set of arms at a distal end, the set of arms positioned around a longitudinal axis of the handle and configured to flex toward the longitudinal axis of the handle when the handle is rotated relative to the plunger so as to facilitate removal of the handle from the plunger.

5. The system of claim 1 , further comprising an adapter to selectively couple to the syringe when the handle is removed from the plunger, the adapter comprising an interface to couple the pressure delivery device to the syringe.

6. The system of claim 1 , further comprising a swivel elbow to selectively couple the distal nose of the barrel to a delivery needle.

7. The system of claim 1 , wherein the plunger comprises a seal.

8. The system of claim 1 , wherein the mating proximal portion comprises multiple facets disposed around an axis of the plunger.

9. The system of claim 1 , wherein the mating surface comprises multiple facets disposed around an axis of the retainer.

10. The system of claim 1 , wherein the handle comprises a handgrip and an elongate shaft selectively coupled to the plunger to facilitate plunger movement relative to the barrel, and
wherein the handle is configured to release from the plunger when the mating proximal portion is coupled with the mating surface and the handle is rotated relative to the plunger.

11. The system of claim 1 , wherein the mating surface is tapered in a longitudinal direction of the barrel, and
wherein the mating proximal portion is tapered in a longitudinal direction of the barrel.

12. A system for delivering a fluid treatment to a patient, the system comprising:
a syringe comprising:
a barrel to hold the fluid treatment, the barrel including a distal nose;
a plunger within the barrel to displace the fluid treatment;
a handle selectively coupled to the plunger to facilitate plunger movement; and
a retainer removeably attachable to a proximal end of the barrel, the retainer comprising a socket with a mating surface corresponding to a mating proximal portion of the plunger,

wherein when the plunger is positioned at the proximal end the mating surface of the socket engages with the mating proximal portion of the plunger to prevent rotational movement of the plunger relative to the barrel.

13. The system of claim 12 , wherein the handle comprises a set of arms at a distal end, the set of arms positioned around a longitudinal axis of the handle and configured to flex toward the longitudinal axis of the handle when the handle is rotated relative to the plunger so as to facilitate removal of the handle from the plunger.

14. The system of claim 12 , wherein the mating proximal portion comprises multiple facets disposed around an axis of the plunger.

15. The system of claim 12 , wherein the mating surface comprises multiple facets disposed around an axis of the retainer.

16. The system of claim 12 , wherein the handle is configured to release from the plunger when the mating proximal portion is coupled with the mating surface and the handle is rotated relative to the plunger.

17. The system of claim 12 , further comprising an adapter to selectively couple to the syringe when the handle is removed from the plunger, the adapter comprising an interface to couple a pressure delivery device to the syringe.

18. A system for delivering a fluid treatment to a patient, the system comprising:
a syringe comprising:
a barrel to hold the fluid treatment, the barrel including a distal nose;
a plunger within the barrel to displace the fluid treatment; and
a handle selectively coupled to the plunger to facilitate plunger movement, the handle comprising a set of arms at a distal end, the set of arms positioned around a longitudinal axis of the handle and configured to flex toward the longitudinal axis of the handle when the handle is rotated relative to the plunger so as to facilitate removal of the handle from the plunger.

19. The system of claim 18 , wherein the syringe further comprises a retainer removeably attachable to a proximal end of the barrel, the retainer comprising a socket with a mating surface corresponding to a mating proximal portion of the plunger, wherein when the plunger is positioned at the proximal end the mating surface of the socket engages with the mating proximal portion of the plunger to prevent rotational movement of the plunger relative to the barrel.

Assignees

• Dfine Inc

Inventors

• Purdy Craig
• Balbierz Dan
• Shirley Nate
• Poursaid Andy
• Mcarthur Gregory R
• Poser Robert D

Classifications

• A61B17/8802

  Equipment for handling bone cement or other fluid fillers · CPC title

• A61B17/8822

  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

• B01F35/75425

  using pistons or plungers · CPC title

• A61B17/8827

  with filtering, degassing, venting or pressure relief means · 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