# US 2018/0021076 A1 · Bone cement applicator with three-way valve for pressure relief

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- Number: US 2018/0021076 A1
- Document ID: US20180021076A1
- Status: Published application
- Kind: A1
- Application number: 15/656,383
- Filed: 2017-07-21
- Published: 2018-01-25
- Earliest claimed: 2016-07-21
- Assignees: Heraeus Medical GmbH
- Applicants: Heraeus Medical GmbH
- Inventors: Sebastian VOGT; Thomas KLUGE
- Web page: https://patentgrep.com/patent/US20180021076A1

## CPC

- 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 17/8816: {characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections}
- A61B 17/8825: {characterised by syringe details (A61B17/8822, A61B17/8827 take precedence)}
- A61B 17/8827: {with filtering, degassing, venting or pressure relief means}
- 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}
- A61L 27/16: obtained by reactions only involving carbon-to-carbon unsaturated bonds
- A61L 27/50: Materials characterised by their function or physical properties {, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials}
- B01F 23/53: using driven stirrers
- B01F 23/57: Mixing high-viscosity liquids with solids
- B01F 25/4314: with helical baffles
- B01F 25/43141: {composed of consecutive sections of helical formed elements}
- B01F 27/2122: Hollow shafts
- B01F 27/806: with vertical displacement of the stirrer, e.g. in combination with means for pivoting the stirrer about a vertical axis in order to co-operate with different receptacles
- B01F 31/40: with an axially oscillating rotary stirrer
- B01F 33/5011: {portable during use, e.g. hand-held}
- B01F 33/50112: {of the syringe or cartridge type}
- B01F 33/821: {with consecutive receptacles}
- B01F 35/3202: {Hand driven}
- B01F 35/602: {with a safety or relief valve}
- B01F 35/7174: {using pistons, plungers or syringes}
- B01F 35/754251: {reciprocating in the mixing receptacle}
- B01F 35/75471: {being adjustable}
- B05C 17/0146: {comprising a valve in the proximity of the nozzle that is not actuated by pressure, e.g. manually actuated}
- A61B 2017/8838: {for mixing bone cement or fluid fillers}
- B05C 17/00553: {with means allowing the stock of material to consist of at least two different components}
- B05C 17/01: with {manually} mechanically or electrically actuated piston or the like {(B05C17/00533 takes precedence)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)
- B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08)

## Abstract

Bone cement applicators and methods for application of a bone cement dough, the applicators and methods comprise a tubular cartridge with an internal space, a dispensing plunger for expelling the starting components through an opening of the cartridge opposite from the dispensing plunger, wherein the dispensing plunger is mobile in longitudinal direction in the internal space of the cartridge. The applicators and methods further comprise a hose, an application opening, a three-way valve operable from outside and arranged or arrangeable in the hose or on a side of the hose facing the cartridge, and a collecting container arranged on the three-way valve. The three-way valve is designed and arranged or arrangeable in the applicator such that it, being in a first position, provides a fluid connection between the application opening and the opening of the cartridge and closes a feed-through to the collecting container and, being in a second position, provides a fluid connection between the application opening and the collecting container and closes a passage to the opening of the cartridge.

## Claims

### Claim 1

A bone cement applicator for application of a bone cement dough, the bone cement applicator comprising:
a tubular cartridge with an internal space;
a dispensing plunger for expelling the starting components of the bone cement dough from the cartridge through an opening of the cartridge opposite from the dispensing plunger, wherein the dispensing plunger is mobile in longitudinal direction in the internal space of the cartridge;
a hose;
an application opening through which the bone cement dough is applicable;
a three-way valve operable from outside and arranged in the hose or on a side of the hose facing the cartridge, wherein the three-way valve is in fluid connection with the opening of the cartridge, when the three-way valve is connected to the cartridge; and
a collecting container arranged on the three-way valve for accommodation of bone cement dough;
wherein the three-way valve is designed and/or arranged or arrangeable in the bone cement applicator such that it, being in a first position, provides a fluid connection between the application opening and the opening of the cartridge and closes a feed-through to the collecting container and, being in a second position, provides a fluid connection between the application opening and the collecting container and closes a passage to the opening of the cartridge.

### Claim 2 (depends on 1)

The bone cement applicator according to claim 1, further comprising:
a mixer for mixing of the bone cement dough arranged or arrangeable downstream from the opening of the cartridge or between the opening of the cartridge and the three-way valve or the hose, wherein the three-way valve is arranged or arrangeable between the mixer and the hose, wherein the three-way valve, being in the first position, provides a fluid connection between the application opening and the mixer and, being in the second position, closes the passage to the mixer.

### Claim 3 (depends on 1)

The bone cement applicator according to claim 1, wherein the bone cement applicator is operable by means of a manually operated extrusion device and the dispensing plunger is movable in the cartridge by manual force, wherein the cross-section of the internal space of the cartridge is maximally 3.5 cm2.

### Claim 4 (depends on 1)

The bone cement applicator according to claim 1, wherein at least part of the hose is flexible and/or the application opening is arranged in a connection with an internal thread, in a Luer system adapter, or in a trocar.

### Claim 5 (depends on 1)

The bone cement applicator according to claim 1, wherein the collecting container is fluid-tight or fluid-tight and gas-tight, and/or the collecting container has a volume that is at least as large as half the volume of the hose.

### Claim 6 (depends on 1)

The bone cement applicator according claim 1, wherein the cartridge comprises, on its rear side, an attachment element for attachment of an extrusion device.

### Claim 7 (depends on 1)

The bone cement applicator according to claim 1, wherein the cartridge comprises a cylindrical internal space and/or the dispensing plunger closes off tightly against the internal wall of the cartridge by means of at least one circumferential seal and/or a wiper lip.

### Claim 8 (depends on 1)

The bone cement applicator according to claim 1, wherein the opening of the cartridge is arranged in a cartridge head that is detachably connected to the cartridge, wherein an external thread is provided in the region of the opening by means of which the hose or the three-way valve is connected or connectable in pressure-tight manner by means of a sealing means.

### Claim 9 (depends on 1)

The bone cement applicator according to claim 1, further comprising:
a mixing facility provided by means of which the content of the cartridge is mixable in the internal space of the cartridge, wherein the mixing facility is operable from outside when the mixing facility is connected to the cartridge.

### Claim 10 (depends on 9)

The bone cement applicator according to claim 9, wherein multiple mixing vanes, connected to a mixing rod, are arranged in the internal space of the cartridge, and are movable through axial linear motion and through rotation of the mixing rod, in the internal space of the cartridge to mix starting components in the internal space of the cartridge, when the mixing facility is connected to the cartridge.

### Claim 11 (depends on 9)

The bone cement applicator according to claim 9, wherein a mixing rod of the mixing facility is guided through the opening of the cartridge into the internal space of the cartridge, wherein the mixing facility is drawable out of the cartridge, when the mixing facility is connected to the cartridge.

### Claim 12 (depends on 1)

A method for application of a bone cement comprising:
a) providing the bone cement applicator according to claim 1;
b) filling a bone cement dough into the internal space of the cartridge or filling the starting components of the bone cement dough into the internal space of the cartridge;
c) inserting the bone cement applicator into an extrusion device, wherein the extrusion device comprises an axially propellable pestle for propulsion of the dispensing plunger in the internal space of the cartridge in the direction of the opening of the cartridge;
d) moving the three-way valve to the first position or the three-way valve being in the first position and extruding the content of the cartridge by means of the extrusion device by axial propulsion of a pestle of the extrusion device in the direction of the opening, wherein the pestle pushes the dispensing plunger in the direction of the opening, by means of which the bone cement dough is pushed through the hose and out of the application opening or wherein the starting components are mixed to form the bone cement dough and the bone cement dough is subsequently pushed through the hose and out of the application opening; and
e) moving the three-way valve to the second position, wherein the three-way valve, in the second position of the three-way valve, stops the flow of the bone cement dough or of the starting components out of the cartridge into the hose and a part of the bone cement dough that is pressurised between the application opening and the three-way valve is pushed through the three-way valve into the collecting container.

### Claim 13 (depends on 12)

The method according to claim 12, wherein the three-way valve is moved to the first position again in a step f) after step e) and, by this means, the bone cement dough is guided again out of the cartridge through the three-way valve to the application opening, wherein for steps d), e), and f) are repeatable once or multiple times in the order given.

### Claim 14 (depends on 12)

The method according to claim 12, wherein, the starting components or the bone cement dough are filled into the internal space of the cartridge in step b) and the starting components or the bone cement dough is pressed out of the cartridge in step d).

### Claim 15 (depends on 12)

The method according to claim 12, wherein, the starting components are filled into the internal space of the cartridge in step b) and are mixed in the internal space of the cartridge with a mixing facility ahead of step c), wherein the hose with the three-way valve is then attached to the cartridge, wherein the mixing facility is removed from the cartridge before the hose with the three-way valve is connected.