Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
Method for producing bone cement for fixing protheses, whereby the bone cement is manufactured by mixing various substances with each other to provide a setting mass which in set condition is adapted to fix prothesce at sorronding bone tissue, c harac te r i zed b y mixing said various substances under vacuum in order to mixture addition of air into the mixture.
Claim 2
Dependent Claim
63 words
Method for producing bone cement for fixing protheses, whereby the bone cement is manufactured by mixing various substances with each other to provide a setting mass which in set condition is adapted to fix prothesce at sorronding bone tissue, c harac te r i zed b y mixing said various substances under vacuum in order to mixture addition of air into the mixture.
Claim 3
Dependent Claim
17 words
Method according to clain. 1, characterized in that mixing occurs under vacuum of 0,05-0.5 bar absolute pressure.
Claim 4
Dependent Claim
17 words
Method according to clain. 1, characterized in that mixing occurs under vacuum of 0,05-0.5 bar absolute pressure.
Claim 5
Dependent Claim
29 words
Method according to claim 1 or 2, characterized i n that mixing occurs at temperatures within the range of 0-21°C in a mixing space (2) intended for the mixture.
Claim 6
Dependent Claim
33 words
Method according to any preceding claim, whereby one of the substances in the mixture is a liquid, e.g. monomethylmethacrylate, characterized bycooling said liquid before mixing to a temperature of 2-6°C, preferably about 4°C.
Claim 7
Dependent Claim
22 words
Method according to any preceding claim, characterized in that mixing is carried out under a vacuum of at least 70%, preferably 90-98%.
Claim 8
Dependent Claim
26 words
Method according to any preceding claim, characterized b y initiating mixing after a certain vacuum has been obtained in a mixing container (1) adapted for mixing.
Claim 9
Dependent Claim
70 words
Method according to any preceding claim, whereby mixing is carried out in an operating room wherein the bone is operated, and whereby vacuum is generated by means of a vacuum source (17) which is connectable to a mixing container (1 or 21) wherein mixing occurs. characterized by discharging gases generated in the mixing container (1 or 21) before and/or during and/or after mixing by means of the vacuum source (17).
Claim 10
Dependent Claim
110 words
Device for carrying out the method for producing bone cement for fixing protheses, whereby the bone cement is manufactured by mixing various substances with each other to provide a setting mass which in set condition is adapted to fix protheses at surrounding bone tissue according to claim 1, and whereby the mixture is applied to the bone tissue by means of a feed device (20) from which the mixture (19) may be pressed out, characterized by an agitator (8) which is connectable to the feed device (20) and by a vacuum source (17) which is connectable to the feed device for mixing said substances in said feed device under vacuum.
Claim 11
Dependent Claim
48 words
Device according to claim 8, characterized in that the agitator (8) and vacuum source (17) are connectable to the feed device (20) through a cap (26) for sealing off a space (12) in said feed device, from which Space the mixture (19) is intended to be pressed cut.
Claim 12
Dependent Claim
132 words
Device according to claim 8 or 9, whereby the feed device (20) comprises a displaceable piston (23) which is adapted to be moved into a space (22) with the mixture (19) for pressing out the mixture therefrom and whereby mixing of said mixture occurs in said space while said space is connected to the vacuum source (17) for generating a vacuum in said space, characterized in that the vacuum source (17) is provided also to subject a space (35) on the outside of the piston (23) to vacuum while it at the same time generates vacuum in the space (22) within the piston, whereby the space (35) is defined by the outer side of the piston and by a holding device (28) for holding the feed device (20) during the mixing procedure.