Mixing device with operating element and pressure pump for mixing polymethylmethacrylate bone cement

Patent metadata

Field	Value
Publication number	US-10016228-B2
Application number	US-201615371341-A
Country	US
Kind code	B2
Filing date	Dec 7, 2016
Priority date	Dec 7, 2015
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

The invention relates to a mixing device for mixing PMMA bone cement from a monomer liquid and a cement powder, the mixing device comprising at least one cartridge having an evacuable interior for mixing of the bone cement, a mixing device for mixing the content in the interior of the at least one cartridge, which is arranged movably in the interior, a receptacle for receiving a separate container containing the monomer liquid or comprising an integrated container containing the monomer liquid, an opening device, which is arranged in the region of the receptacle in a manner movable relative to the receptacle so that, by moving the opening device, a separate container arranged in the receptacle is openable by means of the opening device, or the opening device is arranged in the region of the integrated container in a manner movable relative to the integrated container so that, by moving the opening device, the integrated container is openable by means of the opening device, a pressure pump, in which a movable plunger for conveying a liquid is arranged and delimits a pump chamber of the pressure pump and a connection line, which connects the interior of the at least one cartridge to the pump chamber of the pressure pump, wherein the mixing device comprises an operating element that is operatable from outside, wherein the plunger in the pressure pump is movable manually by means of the operating element, and wherein the opening device is to be moved relative to the receptacle or relative to the integrated container by means of the same operating element, and the mixing device in the interior of the cartridge is movable by means of the same operating element in order to mix the content in the interior of the cartridge.

First claim

We claim:

1. A mixing device for mixing polymethylmethacrylate bone cement from a monomer liquid and a cement powder, the mixing device comprising
at least one cartridge having an evacuable interior for mixing of the bone cement,
a mixing device for mixing the content in the interior of the at least one cartridge, which is arranged movably in the interior,
a receptacle for receiving a separate container containing the monomer liquid or comprising an integrated container containing the monomer liquid,
an opening device, which is arranged in the region of the receptacle in a manner movable relative to the receptacle so that, by moving the opening device, a separate container arranged in the receptacle is openable by means of the opening device, or the opening device is arranged in the region of the integrated container in a manner movable relative to the integrated container such that, by moving the opening device, the integrated container is openable by means of the opening device,
a pressure pump, in which a movable plunger for conveying a liquid is arranged and delimits a pump chamber of the pressure pump, and
a connection line, which connects the interior of the at least one cartridge to the pump chamber of the pressure pump, wherein the mixing device comprises an operating element that is operatable from outside, wherein the plunger in the pressure pump is movable manually by means of the operating element, and wherein
the opening device is movable relative to the receptacle or relative to the integrated container by means of the same operating element, and
the mixing device in the interior of the cartridge is to be moved by means of the same operating element in order to mix the content in the interior of the cartridge.

2. The mixing device according to claim 1 , wherein the operating element is connected or connectable to the plunger such that the plunger is movable manually in the pressure pump by operation of the operating element.

3. The mixing device according to claim 1 , wherein the receptacle, at least in regions, has closed side walls for receiving a glass ampoule as separate container, wherein the receptacle has at least one deformable closed side wall and a supporting element is provided opposite the deformable side wall, wherein the opening device is pressable via the operating element against the deformable side wall of the receptacle so that the deformable side wall deforms in such a way that a matching glass ampoule arranged in the receptacle can be broken open by means of the opening device.

4. The mixing device according to claim 1 , wherein the opening device has a first lever which is mounted rotatably about a first axis in relation to the receptacle or the integrated container, wherein a free end of the first lever is pushable against a deformable side wall of the receptacle or the integrated container, wherein the operating element is formed by a second lever, which is mounted rotatably about a second axis in relation to the receptacle or the integrated container, wherein the second axis divides the second lever into a short lever arm and a long lever arm, wherein an end of the short lever arm is to be pushed by manual operation of the long lever arm against the first lever so that the free end of the first lever pushes against the deformable side wall and deforms this in such a way that a separate container disposed in the receptacle is openable, or pushes the first end of the first lever against the integrated container so that the integrated container opens towards a connection to the pump chamber.

5. The mixing device according to claim 1 , wherein the operating element is manually movable, preferably is a lever pivotable about an axis, wherein the operating element is operatively connected to or is to be brought into operative connection with the opening device, the pressure pump, and the mixing device such that with a first operation of the operating element a separate container in the receptacle or the integrated container is to be opened, and with a further operation of the operating element the vacuum plunger in the vacuum pump is to be driven, the plunger in the pressure pump is to be driven, and the mixing device in the interior is to be driven.

6. The mixing device according to claim 5 , wherein the plunger of the pressure pump and/or the mixing device are to be driven via a flexible cable and/or a rod, wherein a detent means is provided on the flexible cable and/or the broad and after first-time operation of the operating element engages with a mating detent means on the operating element or with a mating detent means connected to the operating element so that, with operation of the operating element subsequent to the latching, the plunger of the pressure pump and/or the mixing device are/is to be driven via the cable and/or the rod by means of the operating element.

7. The mixing device according to claim 1 , wherein the mixing device is axially movable in the interior in the longitudinal direction by operation of the operating element.

8. The mixing device according to claim 1 , wherein the mixing device is rotatable about the longitudinal axis of the interior by operation of the operating element, wherein a cylinder connected to the mixing device and having an external thread moves in a stationary sleeve having a matching internal thread such that, when the cylinder moves along the longitudinal direction within the sleeve, a rotation of the cylinder is enforced, wherein the rotation of the cylinder transfers to the mixing device in the interior of the cartridge.

9. The mixing device according to claim 1 , wherein the pump chamber of the pressure pump is liquid-tight and is arranged in the interior of the pressure pump, wherein the plunger is manually drivable via the operating element in at least one direction, such that the pump chamber is to be made smaller by the movement of the plunger and the content in the pump chamber, in particular the monomer liquid in the pump chamber, is pushable through the connection line into the interior of the at least one cartridge by means of the resultant reducing volume of the pump chamber.

10. The mixing device according to claim 1 , wherein the plunger is mounted axially movably in a hollow cylinder, wherein the hollow cylinder is closed on a first side opposite the plunger or is closed apart from a feedthrough for a rod or cable connected to the operating element and the plunger, in particular is closed by a closure, wherein the pump chamber is preferably formed in the hollow cylinder between the plunger and the first closed side, wherein the hollow cylinder is particularly preferably open on a second side.

11. The mixing device according to claim 10 , wherein the plunger of the pressure pump is to be driven via a flexible cable and/or a rod, wherein a first part of the cable and/or the rod runs through the pump chamber and is guided out from the pump chamber on the first side through a liquid-tight feedthrough, in particular is guided out from the pump chamber through a liquid-tight feedthrough through the closure, wherein the plunger is to be drawn in the direction of the first side of the hollow cylinder by operation of the operating element by means of the flexible cable and/or the rod, such that the pump chamber is made smaller.

12. The mixing device according to claim 1 , wherein the plunger is connected or connectable to the operating element via a rod and/or a cable and the plunger is preferably to be moved by operation of the operating element in the pressure pump.

13. The mixing device according to claim 1 , wherein a movable dispensing plunger for discharging the mixed bone cement

Assignees

• Heraeus Medical Gmbh

Inventors

• Vogt Sebastian
• Kluge Thomas

Classifications

• A61B17/8833 Primary

  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

• A61L24/06

  obtained by reactions only involving carbon-to-carbon unsaturated bonds {(A61L24/043, A61L24/046 take precedence)} · CPC title

• A61B2017/8838

  for mixing bone cement or fluid fillers · CPC title

• B01F3/14

  Operations & Transport · mapped topic

• B01F15/0206

  Operations & Transport · mapped topic