Bone cement applicator with three-way valve for pressure relief

Patent metadata

Field	Value
Publication number	US-10517661-B2
Application number	US-201715656383-A
Country	US
Kind code	B2
Filing date	Jul 21, 2017
Priority date	Jul 21, 2016
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

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.

First claim

The invention claimed is:

1. A bone cement applicator for application of a bone cement dough, the bone cement applicator comprising:
a 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, when the three-way valve is connected to the cartridge, the three-way valve is in fluid connection with the opening of the cartridge, and the three-way valve is movable to at least a first position or a second position; and
a collecting container arranged on the three-way valve for accommodation of bone cement dough,
wherein the three-way valve is designed, arranged, or arrangeable in the bone cement applicator such that, when the three-way valve is in the first position, the three-way valve provides a fluid connection between the application opening and the opening of the cartridge and closes a feed-through to the collecting container and, when the three-way valve is in the second position, the three-way valve provides a fluid connection between the application opening and the collecting container and closes a passage to the opening of the cartridge.

2. 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.

3. 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 cm 2 .

4. 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.

5. 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.

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

7. 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.

8. 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.

9. 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.

10. 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.

11. 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.

12. 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 pressurized between the application opening and the three-way valve is pushed through the three-way valve into the collecting container.

13. The method according to claim 12 , wherein the three-way valve is moved to the first position again in f) after 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 d), e), and f) are repeatable once or multiple times in the order given.

14. 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 b) and the starting components or the bone cement dough is pressed out of the cartridge in d).

15. The method according to claim 12 , wherein, the starting components are filled into the internal space of the cartridge in b) and are mixed in the internal space of the cartridge with a mixing facility ahead of 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.

Assignees

• Heraeus Medical Gmbh

Inventors

• Vogt Sebastian
• Kluge Thomas

Classifications

• B05C17/01

  with {manually} mechanically or electrically actuated piston or the like {(B05C17/00533 takes precedence)} · CPC title

• B05C17/0146

  comprising a valve in the proximity of the nozzle that is not actuated by pressure, e.g. manually actuated · CPC title

• B05C17/00553

  with means allowing the stock of material to consist of at least two different components · CPC title

• A61B17/8825

  characterised by syringe details (A61B17/8822, A61B17/8827 take precedence) · CPC title

• A61B17/8833

  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 · CPC title