WO1997034488A1 - Sterilant composition - Google Patents
Sterilant composition Download PDFInfo
- Publication number
- WO1997034488A1 WO1997034488A1 PCT/GB1997/000750 GB9700750W WO9734488A1 WO 1997034488 A1 WO1997034488 A1 WO 1997034488A1 GB 9700750 W GB9700750 W GB 9700750W WO 9734488 A1 WO9734488 A1 WO 9734488A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- iodine
- sterilant composition
- concentration
- stage cold
- composition
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/12—Iodine, e.g. iodophors; Compounds thereof
Definitions
- This invention relates to a sterilant composition and in particular a composition suitable for use in a single-stage "cold" sterilising procedure having particular applicability to the sterilisation of dental and surgical instruments such as endoscopes.
- the usual method of sterilising surgical instruments is by autoclaving, i.e. by enclosing the instruments in a chamber and supplying steam under high pressure and at high temperature.
- Steam sterilising is very effective but has several disadvantages, including that the process is relatively slow; the steam sterilising apparatus cannot be conveniently located close to the area where the surgical instruments are to be used, and also cannot be used for delicate surgical instruments which have integral optics and sensors or other heat sensitive parts, such as endoscopes, which are likely to oe damaged by steam and heat.
- Cold sterilising procedures at present employed usually involve chemicals such as ethylene oxide, peracetic acid, formaldehyde, gluteraldehyde or hydrogen peroxide.
- chemicals such as ethylene oxide, peracetic acid, formaldehyde, gluteraldehyde or hydrogen peroxide.
- the chemicals are not easy to handle, being toxic, corrosive and/or inflammable and may also cause dermatitis and other harm to persons involved in the procedures.
- chemical procedures usually require relatively long periods of time and consequently may restrict use of the surgical equipment; the temptation may then be present to re-use such equipment before it has been effectively re-sterilised.
- W092/11875 there is described and claimed a process for sterilising surgical instruments at ambient temperature which process comprises the steps of firstly decontaminating the surgical instrument in a closed environment by washing it in a detergent liquid having bactericidal properties to remove any blood, body tissue and/or fluid adhering to the instrument, and secondly washing the instrument in said closed environment in a strongly bactericidal liquid to sterilise the instrument.
- the detergent liquid used is an aqueous solution of a quaternary ammonium salt, alkyltrimethyl ammonium bromides being particularly preferred, for example, Cetrimide which is a straight chain C 16 alkyltrimethyl ammonium bromide, as they are both surfactants and strong bactericides.
- the quaternary ammonium salt is preferably used at a concentration of the order of about 1% by weight.
- the strongly bactericidal liquid is preferably an aqueous solution of iodine, used at a preferred concentration of the order of about 0.2% by weight.
- the present invention in fact provides a single-stage cold sterilant composition comprising an aqueous solution of lithium iodide and iodine.
- the solution is preferably buffered at an acid pH of between 3 and 5, optimally pH 4, using for example a sodium acetate/acetic acid buffer at 0.2M.
- the iodine is preferably present in the solution at a concentration of at least 0.5% by weigh /volume up to the limit of solubility of iodine in the solution.
- concentration of lithium iodide is preferably at least 1% by weight/volume but it is envisaged that a concentration of down to about 0.5% may be effective.
- the sterilant composition may comprise a buffered aqueous solution of 1% by weight/volume lithium iodide and 1.5% by weight/volume iodine.
- the invention also provides a single-stage method of sterilisation at ambient temperature which comprises bringing the article to be sterilised into contact with the sterilant composition as described above for a period of time of preferably not longer than 30 minutes but sufficient to sterilise the article.
- the small size of the lithium ions may enable the lithium ions to penetrate through small orifices in the otherwise relatively impenetrable outer coating of the spore and thereby to cause initial disruption of the walls of the spore which enables the iodine to gain access to the spore and to perform its usual sterilising effect.
- the lithium ions partially replace calcium, magnesium or iron ions, or any other ions which may be present in the structure of the cell wall. Such substitution may be the cause of distortion or other effects which weaken the cell wall structure and thereby permit the iodine to penetrate to the interior of the spore.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97908362A EP0888061A1 (en) | 1996-03-18 | 1997-03-18 | Sterilant composition |
AU20343/97A AU2034397A (en) | 1996-03-18 | 1997-03-18 | Sterilant composition |
JP9533252A JP2000506881A (en) | 1996-03-18 | 1997-03-18 | Composition for sterilization |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9605651A GB2311222A (en) | 1996-03-18 | 1996-03-18 | Cold sterilant composition comprising an aqueous solution of lithium iodide and iodine |
GB9605651.0 | 1996-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997034488A1 true WO1997034488A1 (en) | 1997-09-25 |
Family
ID=10790580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1997/000750 WO1997034488A1 (en) | 1996-03-18 | 1997-03-18 | Sterilant composition |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0888061A1 (en) |
JP (1) | JP2000506881A (en) |
AU (1) | AU2034397A (en) |
GB (1) | GB2311222A (en) |
WO (1) | WO1997034488A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9905907D0 (en) * | 1999-03-15 | 1999-05-05 | Kelemen Mary V | Sterilant composition |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63159312A (en) * | 1986-12-24 | 1988-07-02 | Nippon Kayaku Co Ltd | Bathing additive |
US4782078A (en) * | 1986-01-16 | 1988-11-01 | Ppg Industries, Inc. | Halophor biocidal compositions |
EP0310476A1 (en) * | 1987-09-22 | 1989-04-05 | Atlantic Pharmaceutical Products Limited | Inhibitory or destructible composition of at least one unicellular living being containing fluor F- and lithium li+ |
WO1995012316A1 (en) * | 1993-11-02 | 1995-05-11 | Duncan Group Plc | A sterilant solution and a method of sterilising surgical instruments |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59192367A (en) * | 1983-04-18 | 1984-10-31 | 三菱レイヨン株式会社 | Imparting of sterilizing property to orthopedic fixing material for treatment |
US4894241A (en) * | 1986-01-16 | 1990-01-16 | Ppg Industries, Inc. | Halophor composition |
JPH03127706A (en) * | 1989-10-13 | 1991-05-30 | Toagosei Chem Ind Co Ltd | Production of insecticide |
-
1996
- 1996-03-18 GB GB9605651A patent/GB2311222A/en not_active Withdrawn
-
1997
- 1997-03-18 JP JP9533252A patent/JP2000506881A/en active Pending
- 1997-03-18 WO PCT/GB1997/000750 patent/WO1997034488A1/en not_active Application Discontinuation
- 1997-03-18 EP EP97908362A patent/EP0888061A1/en not_active Withdrawn
- 1997-03-18 AU AU20343/97A patent/AU2034397A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4782078A (en) * | 1986-01-16 | 1988-11-01 | Ppg Industries, Inc. | Halophor biocidal compositions |
JPS63159312A (en) * | 1986-12-24 | 1988-07-02 | Nippon Kayaku Co Ltd | Bathing additive |
EP0310476A1 (en) * | 1987-09-22 | 1989-04-05 | Atlantic Pharmaceutical Products Limited | Inhibitory or destructible composition of at least one unicellular living being containing fluor F- and lithium li+ |
WO1995012316A1 (en) * | 1993-11-02 | 1995-05-11 | Duncan Group Plc | A sterilant solution and a method of sterilising surgical instruments |
Non-Patent Citations (1)
Title |
---|
CHEMICAL ABSTRACTS, vol. 110, no. 14, 3 April 1989, Columbus, Ohio, US; abstract no. 121096j, XP002033561 * |
Also Published As
Publication number | Publication date |
---|---|
AU2034397A (en) | 1997-10-10 |
GB9605651D0 (en) | 1996-05-22 |
EP0888061A1 (en) | 1999-01-07 |
GB2311222A (en) | 1997-09-24 |
JP2000506881A (en) | 2000-06-06 |
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