Process and device for producing sterile-packed bone cement

• US 5,997,544 A
• Filed: 04/30/1998
• Issued: 12/07/1999
• Est. Priority Date: 05/02/1997
• Status: Expired due to Term

• Current Assignee: Biomet Deutschland GmbH (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Merck Patent GmbH (Merck & Co., Inc.)
• Inventors: Nies, Berthold, Specht, Rainer
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Shai, Duphna
• Application Number:
  US09/069,760
• Time in Patent Office: 586 Days
• Field of Search: 606/92, 606/93, 606/94, 523/113, 523/115, 523/116, 523/118
• US Class Current: 606/92
• CPC Class Codes: A61B 17/8802 Equipment for handling bone cement or other fluid fillers
• CPC Class Codes: A61B 17/8827 with filtering, degassing, venting or pressure relief means
• CPC Class Codes: A61F 2002/4685 by means of vacuum
• CPC Class Codes: A61L 2/206 Ethylene oxide

Abstract

A process and device for producing sterile-packed bone cement, wherein the powder component is gas-sterilized in containers that are used for packing.

Claims

1. A process for producing sterile-packed bone cement, comprising:

providing a first and second containers connected but having an opening therebetween sealed by a first sealing device, wherein said first container contains a polymer powder and said second container contains a monomer;

introducing sterilizing gas via a first sterile filter attached to said first container so as to sterilize said polymer powder in said first container; and

,

introducing the sterilizing gas via a second sterile filter attached to said second container so as to sterilize said second container internally.

2. The process according to claim 1, further comprising:

degassing said first and second containers by way of said first and second sterile filter; and

,

sealing said first container at a first separation area between said first container and said first sterile filter.

3. The process according to claim 2, further comprising:

introducing sterile monomer into said sterilized second container by way of said second sterile filter; and

,

sealing said second container at a second separation area between said second sterile filter and said second container.

4. The process according to claim 2, wherein the degassing is performed in a degassing chamber.

5. The process according to claim 1, further comprising:

evacuating said sterilizing gas from said first container by way of said first sterile filter; and

,

sealing said first container at a first separation area between said first container and said first sterile filter.

6. The process according to claim 1, further comprising:

optionally utilizing a third container for containing a solid or liquid additive component, said third container is located between said second sterile filter and said second container and is connect to said second container via a second sealing device.

7. The process according to claim 6, further comprising:

utilizing a reservoir of result-effective size attached to said first container to create suction via pressure difference between said first container and said second container when said first sealing device is open to draw said monomer from said second container into said first container for mixing with said polymer powder.

8. The process according to claim 7, further comprising:

sterilizing the sterile-packed cement packaging components externally in a secondary packaging.

9. The process according to claim 7, wherein said reservoir is an expansion reservoir.

10. The process according to claim 7, wherein said reservoir is a vacuum reservoir.

11. The process according to claim 7, wherein result-effective size reservoir is a reservoir that effectively accommodates gases that evolve when said polymer powder and said monomer are mixed and create suction to draw said monomer from said second container into said first container when said first sealing device is open.

12. The process according to claim 1, wherein said sterilizing gas is ethylene oxide gas.

13. The process according to claim 1 wherein said sealing device is re-closeable, re-openable, and removable.

14. A device for containing sterile-packed bone cement, wherein sterility is achieved by gas sterilization, said device comprising:

a first container for packing polymer powder;

a second container for packing monomer, said first container being connected to said second container via a first sealing device;

a first sterile filter connected to said first container via a first separation area;

a second sterile filter connected to said second container via a second separation area;

a reservoir, located between said first separation area and a powder filter in communication with said first container, for creating suction via pressure difference between said first container and said second container when said first sealing device is open to draw said monomer from said second container into said first container for mixing with said polymer powder; and

whereby The device is effective for sterilizing the polymer powder, said first container, said second container, the monomer, and the reservoir internally by gas sterilization.

15. The device according to claim 14, wherein said first and second containers are made of polymer films and are suitable for vacuum packing.

16. The device according to claim 14, wherein said reservoir is an expansion reservoir.

17. The device according to claim 14, wherein said reservoir is a vacuum reservoir.

18. The device according to claim 14, wherein said first sealing device is recloseable, re-openable, and removable.

19. The device according to claim 14, wherein said reservoir is of a size effective to accommodate gases that evolve when said polymer powder and said monomer are mixed and create suction to draw said monomer from said second container into said first container when said first sealing device is open.

20. A device for containing sterile-packed bone cement according to claim 14, further comprising:

a third additive container for holding a solid or liquid component that is to be added to the monomer before mixing the monomer with the polymer powder, said third container is connected to said second container via a second sealing device; and

, whereby the device is also effective for sterilizing the third container internally by gas sterilization.

21. A device for containing sterile-packed bone cement according to claim 20, wherein said third container is made of polymer film and is suitable for vacuum packing.