Method of disinfecting medical instruments

• US 5,453,245 A
• Filed: 05/04/1993
• Issued: 09/26/1995
• Est. Priority Date: 09/13/1990
• Status: Expired due to Fees

• Current Assignee: Fresenius AG (Fresenius SE & Co. KGaA)
• Original Assignee: Fresenius AG (Fresenius SE & Co. KGaA)
• Inventors: Kirschner, Ulrich, Jethon, Frank
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Snider, Theresa T.
• Application Number:
  US08/057,202
• Time in Patent Office: 875 Days
• Field of Search: 422/1, 422/28, 134/42, 134/100.1, 210/140, 210/321.09, 210/636, 210/650, 210/651
• US Class Current: 422/28
• CPC Class Codes: A61L 2/18 Liquid substances or solutions comprising solids or dissolved gases
• CPC Class Codes: B01D 61/14 Ultrafiltration; Microfiltration
• CPC Class Codes: B01D 61/147 Microfiltration
• CPC Class Codes: C02F 1/444 by ultrafiltration or microfiltration

Abstract

A method of disinfecting medical instruments which includes positioning one or more medical instruments within a disinfecting chamber. A disinfectant and fresh water from a fresh water source are then mixed. The mixture of disinfectant and fresh water is then passed through a sterile filter having a water flux of more than 30 ml/hr-m² -mmHg into the disinfection chamber for engagement with one or more medical instruments in such a manner that all water and disinfectant engaging the one or more instruments passes through the sterile filter.

Claims

1. A method of disinfecting medical instruments, said method comprising the steps of:

positioning one or more medical instruments within a disinfecting chamber;

mixing a disinfectant and fresh water from a fresh water source; and

passing the mixture of disinfectant and fresh water through a sterile filter having a water flux of more than 30 ml/hr-m² -mmHg into the disinfection chamber for engagement with the one or more medical instruments in such a manner that all water and disinfectant engaging said one or more instruments passes through said sterile filter.

2. The method as recited in claim 1 wherein in the mixing step the mixing occurs in a common conduit.

3. The method as recited in claim 1 wherein in the mixing step the detergent is in concentrate form and the mixing occurs in a common conduit.

4. The method as recited in claim 1 further comprising the steps of:

passing fresh water from the fresh water source through the sterile filter into the disinfection chamber for engagement with the medical instruments to rinse the medical instruments.

5. The method as recited in claim 1 wherein said sterile filter is separated by a semi-permeable membrane into a first filter chamber and a second filter chamber, said first filter chamber being in fluid communication with said mixture of disinfectant and fresh water and said second filter chamber being in fluid communication with the disinfection chamber.

6. A method of disinfecting medical instruments, said method comprising the steps of:

positioning one or more medical instruments within a disinfecting chamber;

mixing a disinfectant and fresh water from a fresh water source;

passing the mixed disinfectant and fresh water through a sterile filter which comprises a plurality of microporous hollow fibers, which form a membrane having an average pore size of less than 0.5 μ

m, such that the sterile filter has a water flux of more than 30 ml/hr-m² -mmHg; and

passing the sterilized mixture of disinfectant and fresh water into the disinfection chamber for engagement with the one or more medical instruments in such a manner that all water and disinfectant engaging said one or more instruments passes through said sterile filter.

7. The method as recited in claim 6 wherein in the mixing step the mixing occurs in a common conduit.

8. The method as recited in claim 6 wherein in the mixing step the detergent is in concentrate form and the mixing occurs in a common conduit.

9. The method as recited in claim 6 further comprising the steps of:

passing fresh water from the fresh water source through the sterile filter into the disinfection chamber for engagement with the medical instruments to rinse the medical instruments.

10. The method as recited in claim 6 wherein said wherein said sterile filter is separated by a semi-permeable membrane into a first filter chamber and a second filter chamber, said first filter chamber being in fluid communication with said mixture of disinfectant and fresh water and said second filter chamber being in fluid communication with the disinfection chamber.

11. A method of disinfecting medical instruments comprising the steps of:

positioning one or more medical instruments within a disinfecting chamber;

mixing a disinfectant and fresh water from a fresh water source; and

passing the mixture of disinfectant and fresh water through a sterile filter having a water flux of more than 30 ml/hr-m² -mmHg into the disinfection chamber prior to engagement with the one or more medical instruments in the disinfecting chamber such that all water and disinfectant engaging said one or more medical instruments passes through said sterile filter.