Method and apparatus for disinfecting objects

• US 5,171,523 A
• Filed: 11/01/1989
• Issued: 12/15/1992
• Est. Priority Date: 10/03/1988
• Status: Expired due to Fees

• Current Assignee: Robert Williams
• Original Assignee: Robert Williams
• Inventors: Williams, Robert M.
• Primary Examiner(s): Warden, Robert J.
• Assistant Examiner(s): Beisner, William H.
• Application Number:
  US07/434,851
• Time in Patent Office: 1,140 Days
• Field of Search: 422/20, 422/25, 422/28, 422/33, 422/36, 422/37, 422/294, 422/300, 206/205, 206/210, 206/610, 206/67.1, 383/4, 383/33, 383/34, 383/40, 383/75, 383/76, 383/72
• US Class Current: 422/20
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable
• CPC Class Codes: A61B 50/36 for collecting or disposing of used articles
• CPC Class Codes: A61L 2/18 Liquid substances or solutions comprising solids or dissolved gases
• CPC Class Codes: A61L 2/26 Accessories or devices or components used for biocidal treatment

Abstract

Contaminated objects are disinfected in a device which has a cavity formed by a fluid impermeable wall, an opening that is closeable by a seal, and a dispensing conduit which is spaced from the seal. Objects are placed in the cavity, the opening is sealed, and a disinfectant soluiton is introduced into the dispensing conduit. The disinfectant solution flows from outlets in the conduit into the cavity so that the objects in the cavity are disinfected by the solution and its vapors.

Claims

1. A device for receiving and disinfecting biological materials, contaminated items, and other objects, comprising,

a wall which forms a cavity for holding objects to be disinfected, said wall being formed of a sheet material which is substantially impervius to liquids and gases,

an elongated dispensing conduit means for releasing disinfectant solution into said cavity, said dispensing conduit means having outlets which are spaced apart along its length and are positioned to release disinfectant solution into said cavity,

means for introducing a disinfectant solution into the dispensing conduit means so that the disinfectant solution will be released through said outlets into spaced apart locations in said cavity,

said device having an opening which permits objects to be inserted into the cavity, and sealing means for closing the opening to retain objects and disinfectant solution within the cavity so that the objects will be disinfected by the disinfectant solution and its vapors, said dispensing conduit being spaced from the sealing means.

2. A device according to claim 1 wherein the sealing means includes a drawstring which extends around the opening to constrict and close the opening, said wall being folded on itself between the drawstring and the dispensing conduit means, said drawstring also extending around the device at a location between the fold and the dispensing conduit means.

3. A device according to claim 1 wherein the means for introducing a disinfectant solution is a frangible ampule.

4. A device according to claim 1 including a disinfectant solution containing a disinfecting agent selected from the group consisting of glutaraldehyde, sodium hypochlorite, and alcohol.

5. A device according to claim 1 wherein the wall is formed of layers of polyethylene and polyester.

6. A device according to claim 1 in which an absorbent liner of sheet material is located inside the wall so as to face toward objects in the cavity, said outlets of the dispensing conduit means being positioned to release disinfectant solution into said absorbent liner.

7. A device according to claim 1 wherein the dispensing conduit means extends around the perimeter of the device.

8. A device according to claim 1 in which the dispensing conduit means extends along a side of the cavity.

9. A device according to claim 8 wherein the device is formed of two contiguous panels that are sealed together to form the cavity and the dispensing conduit means, said device having a seal formed between the conduit means and the cavity, said seal being discontinuous to provide the outlets for disinfectant solution.

10. A device according to claim 9 in which the device has a first neck and a second neck, said first neck including said opening for inserting said objects into the cavity, said second neck providing said means for introducing the disinfectant solution into the dispensing conduit means.

11. A device according to claim 10 having a tearable line of weakness which initially connects the first and second necks.

12. A device according to claim 10 having a removable seal which initially closes the second neck.

13. A device according to claim 10 having seals positioned and arranged to extend only partially across the second neck to deter outward flow of liquid and vapor through the second neck.

14. A device according to claim 1 wherein the sealing means includes a tie that encircles a gathered and folded portion of the device.

15. A device according to claim 1 wherein the cavity contains an absorbent means for absorbing contaminated liquid introduced into the cavity.

16. A method for disinfecting biological materials comprising the steps of providing a device having a wall which forms a cavity for holding objects to be disinfected, and a dispensing conduit means extending along one side of the cavity and provided with outlets which are positioned to release disinfectant solution into the cavity, said method including the steps of

sealing the cavity when it contains objects that are to be disinfected,

orienting the device so that the outlets extend along the upper portion of the cavity above the objects to be disinfected,

introducing a disinfectant solution into the dispensing conduit so that the disinfectant solution will flow through the outlets and downward into the objects within the cavity, said disinfectant solution being provided in quantities sufficient to disinfect the objects within the cavity, and

sealing the dispensing conduit means to prevent vapors from escaping the cavity via the dispensing conduit.

17. A method according to claim 16 including the step of rotating the device to distribute the disinfectant solution in the cavity.

18. A method according to claim 16 including the step of subjecting the device to ultrasonic waves after the disinfectant solution has flowed into the cavity.

19. A method according to claim 16 including the step of applying a pressure difference across said wall to reduce the volume of the cavity after the disinfectant solution has flowed into the cavity.

20. A method of disinfecting biological materials, contaminated items, and other objects, comprising the steps of:

providing a device which has a wall which forms a cavity for holding objects to be disinfected, said wall being formed of sheet material which is substantially impervious to liquids and gases, said device having an opening which permits objects to be inserted into the cavity, and an absorbent liner of sheet material which is located inside the wall so as to face toward objects in the cavity, said device having an elongated dispensing conduit which extends along said wall of the device and an outlets formed therein, and spaced apart along its length,

inserting contaminated objects into said cavity,

closing the opening with a sealing means,

introducing a disinfectant solution into the dispensing conduit means, and releasing the disinfectant solution through said outlets into spaced apart locations in said absorbent liner until the objects are disinfected by the disinfectant solution and its vapors.

21. A method according to claim 20 including the step of subjecting the device to ultrasonic waves after the disinfectant solution has flowed into said absorbent liner.

22. A method according to claim 20 including the step of applying a pressure differential across said wall to reduce the volume of the cavity after the disinfectant solution has flowed into said absorbent liner.