Microbial decontamination system with components porous to anti-microbial fluids

• US 5,833,935 A
• Filed: 06/07/1996
• Issued: 11/10/1998
• Est. Priority Date: 01/28/1994
• Status: Expired due to Term

• Current Assignee: Steris Corporation
• Original Assignee: Steris Corporation
• Inventors: Malchesky, Paul S.
• Primary Examiner(s): Warden, Robert J.
• Assistant Examiner(s): MCKANE, ELIZABETH L
• Application Number:
  US08/660,511
• Time in Patent Office: 886 Days
• Field of Search: 422/300, 422/301, 422/28, 206/370, 206/438, 206/210
• US Class Current: 422/300
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/34 Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
• CPC Class Codes: A01N 31/08 Oxygen or sulfur directly attached to an aromatic ring system
• CPC Class Codes: A01N 37/16 containing the group; Thio analogues thereof
• CPC Class Codes: A01N 37/40 having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system
• CPC Class Codes: A01N 37/44 containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
• CPC Class Codes: A01N 59/00 Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
• CPC Class Codes: A01N 59/14 Boron; Compounds thereof
• CPC Class Codes: A61L 11/00 Methods specially adapted for refuse disintegrating medical waste B02C19/0075; disposal of medical waste B09B3/00
• CPC Class Codes: A61L 2/16 using chemical substances
• CPC Class Codes: A61L 2/18 Liquid substances or solutions comprising solids or dissolved gases
• CPC Class Codes: A61L 2/20 Gaseous substances, e.g. vapours
• CPC Class Codes: A61L 2/24 Apparatus using programmed or automatic operation
• CPC Class Codes: A61L 2/26 Accessories or devices or components used for biocidal treatment
• CPC Class Codes: B65D 77/225 Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
• CPC Class Codes: B65D 81/3216 Rigid containers disposed one within the other
• CPC Class Codes: Y10S 422/905 Miscellaneous liquid sterilization means

Abstract

A countertop decontamination unit (A) has a decontamination chamber (10) for receiving a tray or module (C) which contains items to be sterilized, disinfected, or otherwise microbially decontaminated. The tray or walls of the decontamination chamber itself provide fluid outlets from which an anti-microbial solution is conveyed through tubing (76) to fittings (78). A pump (20) recirculates the anti-microbial fluid. The fittings include a porous sleeve (80, 92) which is received in firm frictional connection with an annular surface of a bore, nipple, or coupler mechanism of the item (86) to be sterilized. The porous sleeve is preferably elastomeric when used for frictional interconnections, but may be rigid when used with threaded or other standardized connectors. The porous sleeve has a porosity of 3 microns or more, sufficient that the anti-microbial fluid penetrates through the porous portion and contacts the immediately contiguous and abutting annular surface. The porous member permits sufficient quantities of solution to contact these surfaces to assure they are microbially decontaminated. Associated surfaces that contact the item and can potentially trap microbes are also constructed of porous material. Other associated porous structures include porous closures, such as plugs (124, 160) or caps (120, 122) which close some of the access ports to the interior passages of endoscopes, item retainers (68), a bottom wall portion (62), other surfaces of the item (174), and the like.

Claims

1. In a microbial decontamination system for killing microbes on surfaces of an item by immersing the item in an anti-microbial fluid, the item having at least two interconnected pieces that are connected together such that surfaces on the connected pieces abut each other defining a crevice in which microbes might become trapped, THE IMPROVEMENT COMPRISING:

a porous portion disposed in the crevice, which porous portion is sufficiently porous that the anti-microbial fluid penetrates therethrough to contact and kill the microbes hidden between and on the abutting surfaces.

2. In the microbial decontamination system as set forth in claim 1, the improvement further comprising:

one of the item pieces having a threaded bore and the other of the item pieces having a threaded member which is threadedly received into the threaded bore; and

,

the porous portion being a washer which is disposed around the threaded bore.

3. In the microbial decontamination system as set forth in claim 1, the improvement further comprising:

the item having at least one internal passage and a bore in fluid communication therewith;

a porous fitting frictionally received in the bore.

4. A microbial decontamination system comprising:

a microbial decontamination region for receiving an item to be microbially decontaminated;

an anti-microbial fluid inlet through which anti-microbial fluid is introduced into the microbial decontamination region;

a fluid outlet through which anti-microbial fluid and spent anti-microbial fluid is removed from the microbial decontamination region;

the item having at least two interconnected pieces that are connected together such that surfaces on the connected pieces abut each other defining a crevice in which microbes may become trapped;

an associated surface which abuts one of the potentially microbially contaminated surfaces such that microbes can be sheltered therebetween, avoiding contact with the anti-microbial fluid;

a porous structure disposed in the crevice, the porous structure being permeable by the anti-microbial fluid such that the anti-microbial fluid permeates therethrough contacting and killing any microbes hidden between and on the abutting surfaces.

5. The microbial decontamination system as set forth in claim 4 wherein the associated surface is a surface of a support structure on which the item is supported.

6. The microbial decontamination system as set forth in claim 4 wherein the associated surface is a surface of a spring clamp within which the item is clamped to hold it securely against movement in the decontamination region, porous structures being disposed between all portions of the spring clamp which contact surfaces of the item.

7. The microbial decontamination system as set forth in claim 6 wherein the spring clamp is constructed of an open-celled, resilient plastic material such that the spring clamp and the porous structure are integral.

8. A microbial decontamination system comprising:

a microbial decontamination region for receiving an antimicrobial fluid and an item to be microbially decontaminated, the item being constructed of at least two pieces, an associated surface being defined on one piece of the item abutting another surface of the item that is potentially contaminated by microbes such that a microbe shielding crevice is defined therebetween;

a porous structure including a porous element disposed between the associated surface and the potentially microbially contaminated surface, the porous structure being permeable by the anti-microbial fluid such that the anti-microbial fluid permeates therethrough contacting the potentially microbially contaminated surface killing any microbial contamination thereon.

9. A microbial decontamination system comprising:

a construction for holding an item to be microbially decontaminated, the construction including;

an anti-microbial fluid inlet,

a fluid outlet,

an ambient microbe block for preventing airborne microbes from entering the inlet and the outlet,

a spring clamp anchored to the construction, the spring clamp having opposing fingers which are spring-biased together to engage surfaces of the item to be decontaminated securely and releasably therebetween, wherein the opposing fingers of the spring clamp are constructed of a rigid, porous material such that the porous portions are integral with the opposing fingers, wherein the porous portions are permeable by anti-microbial fluid, which porous portions of said spring clamp fingers abut and contact the item to be microbially decontaminated;

a circulation system for inundating the construction with anti-microbial fluid, the porous portions of the spring clamp fingers being permeable by the anti-microbial fluid such that the anti-microbial fluid penetrates the porous portions of the spring clamp fingers and reaches the surfaces of the item that are engaged between the porous portions 6f the spring clamp fingers.

10. The microbial decontamination system as set forth in claim 9 wherein the rigid, porous material is a rigid, open-celled plastic material.