# US 11,304,739 B2 · Cement mixing and injection system and methods

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- Number: US 11,304,739 B2
- Document ID: US11304739B2
- Status: Granted
- Kind: B2
- Application number: 16/053,011
- Filed: 2018-08-02
- Published: 2019-02-07
- Granted: 2022-04-19
- Earliest claimed: 2017-08-03
- Assignees: DFine, Inc.
- Applicants: DFine, Inc.
- Inventors: Craig Purdy; Dan Balbierz; Nate Shirley; Andy Poursaid; Gregory R. McArthur; Robert D. Poser
- Web page: https://patentgrep.com/patent/US11304739B2

## CPC

- A61B 17/8833: {Osteosynthesis tools specially adapted for handling bone cement or fluid fillers; Means for supplying bone cement or fluid fillers to introducing tools, e.g. cartridge handling means}
- A61B 17/8805: {for introducing fluid filler into bone or extracting it (A61B17/7097, A61B17/8833 take precedence)}
- A61B 17/8816: {characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections}
- A61B 17/8819: {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)}
- A61B 17/8822: {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}
- A61B 17/8827: {with filtering, degassing, venting or pressure relief means}
- B01F 25/00: Flow mixers; Mixers for falling materials, e.g. solid particles (centrifugal mixers B04)
- B01F 27/00: Mixers with rotary stirring devices in fixed receptacles (magnetic mixers B01F33/45); Kneaders
- A61B 17/8802: {Equipment for handling bone cement or other fluid fillers}
- A61B 17/8825: {characterised by syringe details (A61B17/8822, A61B17/8827 take precedence)}
- A61B 2017/0046: {with a releasable handle; with handle and operating part separable}
- A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)}
- A61B 2017/8838: {for mixing bone cement or fluid fillers}
- A61M 5/31501: {Means for blocking or restricting the movement of the rod or piston (A61M5/5013 takes precedence)}
- A61M 5/31511: {Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence)}
- A61M 5/31515: {Connection of piston with piston rod}
- A61M 2005/3139: {Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips}
- A61M 2005/31508: {provided on the piston-rod}
- B01F 33/50112: {of the syringe or cartridge type}
- B01F 35/3202: {Hand driven}
- B01F 35/75425: {using pistons or plungers}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## 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.

## Claims

### 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 1)

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.

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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

### Claim 8 (depends on 1)

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

### Claim 9 (depends on 1)

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

### Claim 10 (depends on 1)

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.

### Claim 11 (depends on 1)

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.

### Claim 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.

### Claim 13 (depends on 12)

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.

### Claim 14 (depends on 12)

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

### Claim 15 (depends on 12)

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

### Claim 16 (depends on 12)

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.

### Claim 17 (depends on 12)

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.

### Claim 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.

### Claim 19 (depends on 18)

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.