Vacuum mixing device with operating element, pressure pump, and vacuum pump for mixing polymethylmethacrylate bone cement

Patent metadata

Field	Value
Publication number	US-10065160-B2
Application number	US-201615371345-A
Country	US
Kind code	B2
Filing date	Dec 7, 2016
Priority date	Dec 7, 2015
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A vacuum mixing device or system mixes polymethylmethacrylate bone cement from a monomer liquid and a cement powder. The device or system comprising at least one cartridge comprising 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, 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 vacuum pump, in which a movable vacuum plunger for generating a negative pressure is arranged and delimits a vacuum pump chamber of the vacuum pump, a pressure pump, in which a movable pump plunger for conveying a liquid is arranged and delimits a pressure pump chamber of the pressure pump, a connection line, and a fluid connection. The device or system further comprises an operating element that is operatable from outside, wherein, by means of the operating element, the vacuum plunger in the vacuum pump is movable manually, the pump plunger in the pressure pump is movable manually, the opening device is movable manually relative to the receptacle or relative to the integrated container, and the mixing device is movable manually in the interior of the cartridge.

First claim

We claim:

1. A vacuum mixing device for mixing polymethylmethacrylate bone cement from a monomer liquid and a cement powder, the vacuum 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 vacuum pump, in which a movable vacuum plunger for generating a negative pressure is arranged and delimits a vacuum pump chamber of the vacuum pump,
a pressure pump, in which a movable pump plunger for conveying a liquid is arranged and delimits a pressure pump chamber of the pressure pump,
a connection line, which connects the interior of the at least one cartridge to the vacuum pump chamber of the vacuum pump, and
a fluid connection, which connects the interior of the at least one cartridge to the pressure pump chamber of the pressure pump, wherein the vacuum mixing system comprises an operating element that is operatable from outside, wherein the vacuum plunger in the vacuum pump is movable manually by means of the operating element,
the pump plunger in the pressure pump is movable manually by means of the same operating element,
the opening device is movable relative to the receptacle or relative to the integrated container by means of the same operating element, and herein
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.

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

3. The vacuum 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 vacuum 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 free end of the first lever against the integrated container so that the integrated container opens towards a fluid connection.

5. The vacuum mixing device according to claim 1 , wherein the operating element is manually movable, wherein the operating element is operatively connected to or is to be brought into operative connection with the opening device, the vacuum pump, the pressure pump, and the mixing device in such a way 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 pump plunger in the pressure pump is to be driven, and the mixing device in the interior is to be driven.

6. The vacuum mixing device according to claim 5 , wherein the vacuum plungerof the vacuum pump, the pump plunger of the pressure pump and/or the mixing device are/is to be driven via a flexible cable and/or a rod, wherein a detent means is provided on the flexible cable and/or the rod 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 vacuum plunger of the vacuum pump, the pump 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 vacuum 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 vacuum 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 so 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 vacuum mixing device according to claim 1 , wherein the vacuum pump chamber of the vacuum pump is gas-tight and is arranged in the interior of the vacuum pump, wherein the vacuum plunger is manually drivable via the operating element in at least one direction, such that the vacuum pump chamber is to be enlarged by the movement of the vacuum plunger and the interior of the at least one cartridge is to be evacuable through the connection line by means of the resultant negative pressure created in the vacuum pump chamber.

10. The vacuum mixing device according to claim 1 , wherein the pressure pump chamber of the pressure pump is liquid-tight and is arranged inside the pressure pump, wherein the pump plunger is manually drivable via the operating element in at least one direction so that the pressure pump chamber is to be made smaller by the movement of the pump plunger and the monomer liquid is to be pushed from the pressure pump chamber through the fluid connection into the interior of the at least one cartridge by means of the resultant pressure created in the pressure pump chamber.

11. The vacuum mixing device according to claim 1 , wherein a first one-way valve is arranged in the connection from the vacuum pump chamber to the connection line or in the connection line, which first one-way valve is open or is actively opened when a pressure lower than in the interior of the cartridge prevails in the vacuum pump chamber and is in a closed state or is actively closed when a pressure equal to o

Assignees

• Heraeus Medical Gmbh

Inventors

• Vogt Sebastian
• Kluge Thomas

Classifications

• A61B2017/8838

  for mixing bone cement or fluid fillers · CPC title

• A61L24/06

  obtained by reactions only involving carbon-to-carbon unsaturated bonds {(A61L24/043, A61L24/046 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

• B01F15/0278

  Operations & Transport · mapped topic

• B01F3/1228

  Operations & Transport · mapped topic