Device for mixing and dispensing bone cement

摘要

A device (10) for mixing and dispensing bone cement includes a mixing cylinder (20), in which a mixing plunger (21) is arranged, the mixing plunger (21) being axially movable by an actuation rod (50) guided out in a sealed manner at a first cylinder end (30). A sealing plunger (42) is arranged in a region of the first cylinder end (30), is axially movable on the actuation rod (50) and seals the mixing cylinder (20) in a gas-tight manner. A sterilization plunger (41) is arranged in the region of the first cylinder end (30) between the mixing plunger (21) and the sealing plunger (42), is axially movable on the actuation rod (50) separately from the sealing plunger (42), and seals the mixing cylinder (20) in a gas-permeable manner. The sterilization plunger (41) and the sealing plunger (42) form a two-part plunger system (40).

主权项

1. A device (10) for mixing and dispensing bone cement, the device comprising:
a mixing cylinder (20) in which a mixing plunger (21) is arranged, the mixing plunger (21) being axially movable by an actuation rod (50) guided out in a sealed manner at a first cylinder end (30), a sealing plunger (42) arranged in a region of the first cylinder end (30) being axially movable on the actuation rod (50) and configured to seal the mixing cylinder (20) in a gas-tight manner, a sterilization plunger (41) comprising a gas-permeable grid, arranged in the region of the first cylinder end (30) between the mixing plunger (21) and the sealing plunger (42), being axially movable on the actuation rod (50) separately from the sealing plunger (42) and configured to seal the mixing cylinder (20) in a gas-permeable manner, wherein the gas-permeable grid is adapted to allow only particles smaller than 5 μm to pass therethrough; wherein the sterilization plunger (41) and the sealing plunger (42) form a two-part plunger system (40) having a sterilization position (150) and a mixing position (155), wherein in the sterilization position (150) the sterilization plunger (41) seals the mixing cylinder (20) in the gas-permeable manner and the sealing plunger (42) does not seal the mixing cylinder (20) in the gas-tight manner, such that the plunger system (40) enables a sterilization agent to both flow into the mixing cylinder (20) to rinse bone cement powder therein and exit the mixing cylinder (20), and in the mixing position (155), sealing plunger (42) seals the mixing cylinder (20) in the gas-tight manner, and allows the bone cement powder to be rinsed by a binding agent.