The application relates to a vacuum mixing device for bone cement, where the monomer is pressed into a mixing container due to the surrounding vacuum and a gas volume present in the monomer container.
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1. A mixing device for preparing bone cement, comprising: a mixing container;a monomer container attached to the mixing container and having first and second telescoping parts, the monomer container being moveable relative to the mixing container,wherein one of the first and second telescoping parts
1. A mixing device for preparing bone cement, comprising: a mixing container;a monomer container attached to the mixing container and having first and second telescoping parts, the monomer container being moveable relative to the mixing container,wherein one of the first and second telescoping parts of the monomer container includes at least one catch hook and the other of the first and second telescoping parts of the monomer container includes at least one catch lug for engagement with the respective at least one catch hook such that the monomer container is locked in position relative to the mixing container. 2. The mixing device of claim 1, further comprising a pin for engagement with the monomer container, the pin being disengageable from and removable from the monomer container, wherein, when the pin is engaged with the monomer container, the first telescoping part of the monomer container does not move relative to the second telescoping part of the monomer container, and, upon removal of the pin, the first telescoping part of the monomer container moves relative to the second telescoping part of the monomer container. 3. The mixing device of claim 2, further comprising a monomer vial disposed in the monomer container, wherein upon removal of the pin, the monomer vial slides toward the mixing container and prevents reinsertion of the pin. 4. The mixing device of claim 2, further comprising a monomer vial disposed in the monomer container, wherein the pin includes a shaft and a deflectable tongue extending from the shaft, andwherein, when the pin is engaged with the monomer container, the monomer container rests on the tongue. 5. The mixing device of claim 2, further comprising a cannula attached to the monomer container and configured to pierce a monomer vial when the monomer vial is disposed in the monomer container, wherein when the pin is engaged with the monomer container and the monomer vial is disposed in the monomer container, the pin extends across the monomer container to separate the cannula from the monomer vial. 6. The mixing device of claim 2, wherein the mixing container is connectable to a vacuum source, the mixing device further comprising: a monomer vial disposed in the monomer container and filled at least partially with a volume of gas; anda cannula attached to the monomer container and configured to pierce the monomer vial,wherein when a vacuum is present in the mixing container and the piercing cannula pierces the monomer container, the monomer flows from the monomer container into the mixing container to at least a predefined fill level. 7. The mixing device of claim 6, wherein the at least 20% of the volume of the monomer container is filled with the volume of gas. 8. The mixing device of claim 6, wherein the at least 40% of the volume of the monomer container is filled with the volume of gas. 9. The mixing device of claim 1, wherein the monomer container includes a rod, the monomer container being attached to the mixing container via the rod. 10. The mixing device of claim 9, wherein the monomer container is configured to receive a monomer vial and a channel is disposed in the rod, and wherein monomer from the monomer vial is receivable in the mixing container through the rod. 11. The mixing device of claim 10, further comprising a cannula attached to the monomer container and received in a channel of the rod, the cannula being configured to pierce the monomer vial when the monomer vial is received in the monomer container. 12. The mixing device of claim 9, wherein the mixing container includes a plate, and wherein the rod of the monomer container is guided through the plate, the plate being detachable such that the plate is moveable to expel prepared bone cement. 13. A mixing device for preparing bone cement, comprising: a rod;a mixing container;a monomer container attached to the mixing container via the rod and including first and second telescoping parts, the monomer container and the rod being moveable relative to the mixing container;a cannula attached to the monomer container and having an end received in a channel of the rod, the cannula being configured to pierce a monomer vial when the monomer vial is disposed in the monomer container, wherein when the monomer vial is pierced, monomer flows via the cannula into the mixing container; anda pin for engagement with the monomer container, the pin being disengageable from and removable from the monomer container, wherein, when the pin is engaged with the monomer container, the first telescoping part of the monomer container does not move relative to the second telescoping part of the monomer container, and, upon removal of the pin, the first telescoping part of the monomer container moves relative to the second telescoping part of the monomer container. 14. The mixing device of claim 13, wherein the monomer vial is disposable between the first and second telescoping parts when the monomer vial is disposed in the monomer container and such that when the first telescoping part is telescoped relative to the second telescoping part from a first position to a second position with the monomer vial is disposed in the monomer container, the monomer vial is pushed onto the cannula. 15. The mixing device of claim 13, further comprising the monomer vial disposed in the monomer container, wherein the pin includes a shaft and a deflectable tongue extending from the shaft, andwherein, when the pin is engaged with the monomer container, the monomer container rests on the tongue. 16. The mixing device of claim 13, wherein when the pin is engaged with the monomer container and the monomer vial is disposed in the monomer container, the pin extends across the monomer container to separate the cannula from the monomer vial. 17. The mixing device of claim 13, wherein when the monomer vial is pierced, monomer flows via the cannula into the mixing container, wherein the mixing container includes a plate, and wherein the rod of the monomer container is guided through the plate, the plate being detachable such that the plate is moveable to expel prepared bone cement. 18. A mixing device for preparing bone cement, comprising: a mixing container;a monomer container attached to the mixing container and having first and second telescoping parts, the monomer container being moveable relative to the mixing container; anda pin for engagement with the monomer container, the pin being disengageable from and removable from the monomer container, wherein, when the pin is engaged with the monomer container, the first telescoping part of the monomer container is prevented from moving relative to the second telescoping part of the monomer container, and, upon removal of the pin, the first telescoping part of the monomer container slides relative to the second telescoping part of the monomer container. 19. A mixing device for preparing bone cement, comprising: a rod;a mixing container;a monomer container attached to the mixing container via the rod, the monomer container and the rod being moveable relative to the mixing container; anda cannula attached to the monomer container and having an end received in a channel of the rod, the cannula being configured to pierce a monomer vial when the monomer vial is disposed in the monomer container, wherein when the monomer vial is pierced, monomer flows via the cannula into the mixing container, wherein the mixing container includes a plate, and wherein the rod of the monomer container is guided through the plate, the plate being detachable such that the plate is moveable to expel prepared bone cement. 20. A mixing device for preparing bone cement, comprising: a rod;a mixing container;a monomer container attached to the mixing container via the rod, the monomer container and the rod being moveable relative to the mixing container;a monomer vial disposed in the monomer container; anda cannula attached to the monomer container and having an end received in a channel of the rod, the cannula being configured to pierce the monomer vial, wherein when the monomer vial is pierced, monomer flows via the cannula into the mixing container, wherein the mixing container is connectable to a vacuum source, the monomer vial being filled at least partially with a volume of gas, and wherein when a vacuum is present in the mixing container and the cannula pierces the monomer vial, the monomer flows from the monomer container into the mixing container to at least a predefined fill level.
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