Vacuum mixing system and method for the mixing of polymethylmethacrylate bone cement
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01F-003/12
A61B-017/88
B01F-011/00
B01F-013/00
B01F-013/06
B01F-015/02
A61L-024/06
B01F-003/14
B01F-015/00
출원번호
US-0207781
(2016-07-12)
등록번호
US-9861943
(2018-01-09)
우선권정보
DE-10 2015 111 320 (2015-07-13)
발명자
/ 주소
Vogt, Sebastian
Kluge, Thomas
출원인 / 주소
Heraeus Medical GmbH
대리인 / 주소
Norris McLaughlin & Marcus, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
15
초록▼
Vacuum mixing systems and methods mix of polymethylmethacrylate bone cement, the systems and methods comprise at least one cartridge having an evacuable internal space, a pump with a plunger that can be moved by hand to generate a low pressure, and a connecting conduit connecting the internal space
Vacuum mixing systems and methods mix of polymethylmethacrylate bone cement, the systems and methods comprise at least one cartridge having an evacuable internal space, a pump with a plunger that can be moved by hand to generate a low pressure, and a connecting conduit connecting the internal space of the at least one cartridge to the pump. The pump comprises an operating element that can be operated from outside and is connected appropriately to the plunger such that it is suitable for moving the plunger in the pump by hand such that a low pressure can be generated such that the low pressure of the pump can be used to evacuate gas from the internal space of the at least one cartridge through the connecting conduit.
대표청구항▼
1. A vacuum mixing system for mixing PMMA bone cement comprising: at least one cartridge having an evacuable internal space for mixing of the bone cement and a front side,a pump with a plunger movable by hand to generate a low pressure,a container,a liquid conduit connecting the container to the at
1. A vacuum mixing system for mixing PMMA bone cement comprising: at least one cartridge having an evacuable internal space for mixing of the bone cement and a front side,a pump with a plunger movable by hand to generate a low pressure,a container,a liquid conduit connecting the container to the at least one cartridge,anda connecting conduit connecting the internal space of the at least one cartridge to the pump,wherein the pump comprises an operating element operable from outside and connected appropriately to the plunger such that it is suitable for moving the plunger in the pump by hand such that a low pressure can be generated such that the low pressure of the pump is usable to evacuate gas from the internal space of the at least one cartridge through the connecting conduit,wherein a cement powder is contained in the cartridge and the container contains a monomer liquid, wherein the container is connected via the liquid conduit to the cartridge, whereby the liquid conduit connects at the front side of the cartridge, and the liquid conduit forms a pressure tight connection to the container. 2. The vacuum mixing system according to claim 1, wherein the pump comprises a gas-tight pumping space on the inside and has the plunger movable by hand limiting the pumping space is arranged inside the pump, wherein the plunger is drivable by hand in an unidirectionally, such that the motion of the plunger enlarges the pumping space and the low pressure thus arising in the pumping space allows the internal space of the at least one cartridge to be evacuated through the connecting conduit. 3. The vacuum mixing system according to claim 2, wherein the volume enlargement of the pumping space is at least equal to the free volume of the internal space of the cartridge. 4. The vacuum mixing system according to claim 1, wherein the vacuum mixing system comprises a mixing device for the mixing of the content of the at least one cartridge, wherein the mixing device is arranged in the internal space of the cartridge and/or can be driven manually or through a motor. 5. The vacuum mixing system according to claim 1, wherein the plunger is supported in a hollow cylinder such as to be axially mobile, wherein the hollow cylinder is closed on a first side or is closed except for one feed-through for a rod connected to an operating element and the plunger, wherein a pumping space is formed in the hollow cylinder between the plunger and the first closed side. 6. The vacuum mixing system according to claim 1, wherein the plunger is connected to the operating element by means of a rod and the plunger is movable in the pump by pushing the operating element. 7. The vacuum mixing system according to claim 1, wherein a mobile dispensing plunger for dispensing the mixed bone cement from the cartridge is arranged in the internal space of the cartridge, wherein the dispensing plunger is or can be locked in place in detachable manner in order to prevent the dispensing plunger from moving in response to the effect of the low pressure. 8. The vacuum mixing system according to claim 7, wherein the dispensing plunger comprises a passage with a gas-permeable pore disk that is impermeable for the cement powder, wherein the passage with the pore disk connects the internal space of the cartridge to the surroundings in gas-permeable manner, wherein the passage can be closed in gas-tight manner by means of a sealing plunger of the dispensing plunger. 9. The vacuum mixing system according to claim 1, wherein the cartridge is a cement cartridge filled with the cement powder, wherein the container is connected, in liquid-impermeable manner, to the internal space of the cement cartridge through a separating element that can be opened, and/or the internal space of the cement cartridge is or can be connected to the pump (3) in gas-so manner. 10. The vacuum mixing system according to claim 1, wherein the cartridge, the pump, the separate container, and all connecting conduits are connected to a common foot part either affixed and/or in detachable manner, wherein the pump, the separate container, and all connecting conduits affixed to the foot part and the cartridge be connected to the foot part in detachable manner. 11. The vacuum mixing system according to claim 1, wherein the liquid conduit, which is provided between the separate container and the internal space of the cartridge, comprises an upward facing loop, wherein an apex of the loop is situated above a junction under a monomer container that is arranged in the separate container. 12. The vacuum mixing system according to claim 1, wherein the pump comprises: a hollow cylinder, wherein the hollow cylinder is or can be connected to the internal space of the cartridge;a gas-tight closure on one end of the hollow cylinder;a plunger that is arranged in the hollow cylinder such as to be gas-tight and axially mobile; andat least one operating element that can be operated by hand and can be used to move the plunger in the pump by hand,wherein the plunger can be moved axially in opposite direction with respect to the closure when the plunger is moved by the at least one operating element that can be operated by hand and thus evacuates the gas from the internal space of the cartridge. 13. A method for the mixing of polymethylmethacrylate bone cement in an internal space of the cartridge of a vacuum mixing system according to claim 1, the method comprising moving the manually driven plunger of a pump of the vacuum mixing system to generate a low pressure in the pump, wherein the pump driven is used to evacuate the internal space of the cartridge from above, wherein a cement powder is contained in the internal space of the cartridge and a gas is evacuated from the internal space of the cartridge by the pump, wherein a monomer liquid is introduced into the internal space of the cartridge from below by the low pressure and then the monomer liquid and the cement powder is mixed in the evacuated internal space of the cartridge to form a bone cement. 14. The method according to claim 13, wherein a volume of a pumping space of the pump is enlarged by manually moving the plunger and in that the internal space of the cartridge is evacuated by the low pressure thus generated. 15. The method according to claim 13, wherein the monomer liquid is aspirated into the internal space of the cartridge by the low pressure in the pump. 16. The method according to claim 13, wherein the plunger of the pump is moved by hand, wherein a low pressure with respect to the ambient atmosphere is generated in the pump; wherein gas is aspirated from the internal space of the cartridge from above through a connecting conduit into the hollow cylinder and the monomer liquid is aspirated from below into the cartridge and into the cement powder;followed by the cement powder being mixed, manually or motor-driven, with the monomer liquid by means of a mixing device;followed by the cartridge with the mixed cement dough being removed; andthe cement dough being extruded from the cartridge by moving a dispensing plunger axially. 17. The method according to claim 13, wherein the monomer liquid is arranged in a container that is separate from the cartridge, wherein the monomer liquid is contained in a glass ampoule;the glass ampoule is opened before the plunger is moved by hand such that a liquid-permeable connection is established between the internal space of the cartridge and the container;followed by the plunger being moved axially in the hollow cylinder, wherein a low pressure with respect to the ambient atmosphere is generated;wherein gas is aspirated from the internal space of the cartridge through the connecting conduit into the hollow cylinder, and monomer liquid is aspirated into the cartridge through the low pressure formed in the internal space of the cartridge.
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이 특허에 인용된 특허 (15)
Hauke Gunter (Muhltal DEX) Specht Rainer (Furth DEX) Krotz Ralf (Wiesloch DEX) Funk Reiner (Munster/Altheim DEX) Martin Peter (Wiesbaden DEX) Nies Berthold (Frankisch-Crumbach DEX), A cylinder for mixing components to form bone cement.
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