JPH01288266A - Sterilizing disinfection method - Google Patents

Abstract

PURPOSE:To enable rapid and easy sterilizing disinfection by laying a bag-shaped non-woven fabric in a water impermeable container, housing an aq. soln. of a sterilizing disinfectant contg. a surfactant into the container, charging materials to be treated therein and subjected the material to sterilizing disinfection, then taking out the bag- shaped non-woven fabric and treating the same. CONSTITUTION:The bag-shaped non-woven fabric is laid along the inside circumference of the water impermeable container such as plastic bucket and the aq. soln. of the sterilizing disinfectant contg. the surfactant is housed therein. The materials to be treated such as used implements and clothing in a hospital, etc., are charged into the container and after the materials are subjected to the sterilizing disinfection, the bag-shaped non-woven fabric contg. the materials to be treated is taken out and is treated. Since the surfactant is incorporated into the aq. soln. in the bag constituted of the non-woven fabric, the surface tension of the aq. soln. decreases and the aq. soln. of the sterilizing disinfectant leaks so that only the sterilized materials to be treated remain in the bag. The materials to be treated can be subjected together with the bag easily to a treatment such as incineration treatment. The effect of the sterilizing disinfectant is improved by compounding the surfactant with the aq. soln. of the sterilizing disinfectant, by which the sterilizing disinfection effect is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sterilization method that enables rapid sterilization of instruments, clothing, etc. used, for example, in hospitals.

In-hospital infections such as hepatitis viruses and various bacterial contaminations are becoming a problem. Sterilizing reusable instruments such as tableware and surgical instruments used by patients immediately after use is an effective means of preventing the spread of pathological microorganisms.

In addition, it is an effective means to prevent the spread of hepatitis viruses and bacteria by quickly sterilizing patient secretions, wound gauze, and materials contaminated with blood or urine after an outbreak before incinerating them. 1. For example, it is important to sterilize the human body at an early stage in order to prevent pathological microorganisms from coming into contact with the human body due to an unexpected accident during transportation to the incinerator.

At this time, by using a bag made of nonwoven fabric to serve as both a sterilization container and a transportation container for the next process, sterilization can be performed quickly and easily.

(Prior art) Before reusing tableware and surgical instruments used in a hospital, sterilizing them is an effective means of preventing the spread of pathological microorganisms. Sterilizing gauze, materials with blood, urine, etc. attached before incineration is an effective means of preventing the spread of hepatitis viruses and bacteria.

Conventional sterilization methods include placing used hospital equipment in a container containing a sterilizing disinfectant, or placing a wire mesh basket in a container containing a sterilizing disinfectant. Used instruments were placed in this container, and the sterilizing solution and its contents were removed along with the wire mesh basket and disposed of.

(Problems to be Solved by the Invention) However, the method of putting instruments and the like into a container containing a sterilizing and disinfecting solution involves the hassle of taking out the instruments from the sterilizing and disinfecting solution.

In addition, the method of placing a wire mesh basket in a sterilizing disinfectant solution and taking out the sterilized instruments from the wire mesh basket eliminates the hassle of taking out the instruments from the sterilizing disinfectant solution, but injection needles, etc. Inconveniences such as falling off occur.6Furthermore, depending on the type of sterilizing disinfectant, the wire mesh may corrode.

Furthermore, with these methods, it is not possible to inactivate the sterilizing disinfectant while the instruments to be sterilized are still in the container, and if the sterilizing disinfectant is disposed of without being inactivated, it may cause the activation of wastewater treatment equipment, etc. This results in the death of the sludge.

(Means for Solving the Problems) In order to solve the above problems, in the present invention, a bag-like nonwoven fabric is laid along the inner periphery of a water-impermeable container such as a plastic bucket, and a surface-active material is placed inside the bag-like nonwoven fabric. This paper proposes a sterilization method in which an aqueous solution of a sterilizing agent containing a disinfectant is contained, an object to be treated is placed in the container, and after sterilization, a bag-shaped nonwoven fabric containing the object to be treated is taken out and processed. .

In the present invention, the bag-shaped nonwoven fabric is made of a water-permeable material that does not allow water to pass through an aqueous solution of a sterilizing disinfectant, but allows water to pass through when a surfactant is added thereto.

As the material of the nonwoven fabric, rayon, acetate, nylon, polyester, polypropylene, etc. can be used.

For example, nonwoven fabrics are made of these materials using an appropriate method.
The fibers are arranged in a thin cotton or mat shape, and the fibers are bonded together using an adhesive or the adhesive force of the fibers themselves to form a sheet.

Incidentally, nonwoven fabrics are generally expressed in terms of grams per 1 m'', that is, the basis weight, but in the present invention, commercially available nonwoven fabrics with a weight of 10g to 200g per 1112 cm can be used. Any material may be used as long as it is water-permeable enough to allow water to pass through an aqueous disinfectant solution containing a disinfectant.

Further, the size, shape, etc. of the bag made of nonwoven fabric can be appropriately selected depending on the container containing the sterilizing disinfectant.

Note that a string or the like may be threaded through the entrance of the bag made of nonwoven fabric so that the bag can be closed after sterilization, or the string may be used to connect the bag to the container.

When connecting a bag and a container, the connecting means is not limited to strings,
Various means can be employed.

As the sterilizing disinfectant used in this invention, there may be used a water-soluble one, one that can be solubilized in water with a surfactant, or one that becomes liquid by being decomposed with a non-aqueous solvent.

Furthermore, as the sterilizing disinfectant, various sterilizing and disinfecting agents having sterilizing and disinfecting power can be used depending on the type of pathological microorganisms. Specific examples include hypochlorite, iodine and iodoform, hydrogen peroxide, formaldehyde, geltaraldehyde, phenol, cresol, hexachlorophene, tricloic acid, and chlorhexidine.

Among these, sodium hypochlorite is a preferred disinfectant because it is inexpensive and has a wide range of suitability.

As the surfactant used in this invention, anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants can be used.

Examples of anionic surfactants include fatty acid alkali salt soaps, α-sulfo fatty acid esters, higher alcohol sulfate ester salts, higher alcohol ethoxy sulfate ester salts, alkylbenzene sulfonates, α-olefin sulfonates, alkanesulfonates, Alkylnaphthalene sulfonate, sulfosuccinic acid alkyl ester, alkyl monoglyceride sulfate ester salt, N
-Methylacyloyltaurine, etc. can be mentioned.

Examples of nonionic surfactants include higher alcohol ethoxylates, alkylphenyl ethoxylates, higher alcohol ethoxypropyoxylates, alkylphenylethoxypropioxylates, ethylene oxide brobylene oxide block polymers, sorbitan fatty acid ester ethoxylates, and the like. be able to.

Examples of the cationic surfactant include alkyl quaternary ammonium halides, alkylbenzylammonium halides, alkylpyridinium halides, and amine oxides.

Note that the cationic surfactant itself is a sterilizing disinfectant, and there are cases in which there is no need to add any other sterilizing disinfectant. Benzalkonium chloride is a powerful disinfectant.

Examples of zwitterionic surfactants include alkyldiaminoethylene glycine, alkylimidazolinium halide derivatives, N-alkylammonium betaine derivatives,
Examples include N-alkylaminopropionate, N-alkylaminopropionate, N-alkyliminodipro-onate and the like.

Among these surfactants, higher alcohol sulfate ester salts, especially sodium lauryl sulfate and sodium alkylbenzene sulfonate, have a large ability to lower the surface tension of aqueous disinfectant solutions and have a strong protein denaturing effect. , can be synergized with germicidal disinfectants to increase the efficacy of germicidal agents.

The concentration of the surfactant in the aqueous solution of the sterilizing disinfectant may be such that the surface tension is reduced and the aqueous solution of the sterilizing disinfectant leaks from the pores of the nonwoven fabric, and is 10"'It% to 5wt%, preferably to-" wt% to 0.2wt%t'.

(Effects of the Invention) That is, in this invention, a bag-like nonwoven fabric is laid along the inner periphery of a water-impermeable container such as a plastic bucket, and an aqueous solution of a sterilizing disinfectant containing a surfactant is stored inside the bag-like nonwoven fabric. At the same time, objects to be treated such as used equipment and clothing at hospitals etc. are put into the container, and after sterilization, the bag-shaped non-woven fabric containing the objects to be treated is taken out. Since the aqueous solution inside the bag contains a surfactant, the surface tension of the aqueous solution decreases, and the aqueous disinfectant solution leaks out, leaving only the sterilized material in the bag. Items can be easily incinerated or otherwise processed together with the bag.

Furthermore, the action of the disinfectant can be increased by incorporating a surfactant into the aqueous solution of the disinfectant.

For example, the sterilizing and disinfecting action of sodium hypochlorite is improved by the protein denaturing power and cell membrane permeability of anionic surfactants such as sodium lauryl sulfate.

(Example) Examples of this invention will be shown below.

Example 1 Tableware eaten by patients in a tuberculosis ward was collected in a ward serving room, and a bag made by heat-sealing a 50 g/I12 nonwoven fabric made of polypropylene was placed along the inner circumferential surface of the tableware, and lauryldiaminoethylglycine 0 Prepare a 100I2 polyethylene tank containing an aqueous solution of a sterilizing disinfectant at 35°C containing 2 wt% of gel taraldehyde, and immediately put the collected dishes into the aqueous solution of the sterilizing disinfectant, and after 1 hour. After the bag made of non-woven fabric was pulled up and the aqueous solution inside the bag leaked out, it was transported to an automatic dishwasher room, the dishes inside the non-woven fabric bag were thrown into a pre-wash soaking tank, and then washed in an automatic dishwasher.

As a result, no tuberculosis bacteria was found even when the sterilizing solution remaining in the 100β polyethylene tank and the water droplets adhering to the dishes in the bag were cultured.

The disinfectant solution in the tank was deactivated with ammonia water and then discarded.

Example 2 A bag made of non-woven fabric of 30 g/cm2 of polyester was housed along its inner surface, and 200 ppm of sodium lauryl sulfate and 500 ppm of sodium chlorite were added to the bag.
A 20β polyethylene bucket containing an aqueous solution of a sterilizing disinfectant at 30°C and adjusted to pH 3.0 was prepared in the blood testing room. After the test, the trays, plates, pipettes, glycoaters, chips, test tubes, etc. used for the HB antigen test were separated into disposable and non-disposable items and immediately placed into a sterilizing solution in a plastic bucket. Final input 30
After a few minutes, the bag was lifted and the sterilizing solution leaked out.
The bags containing disposable items were incinerated at an incinerator.

The residual hypochlorous acid concentration in the aqueous disinfectant solution in the plastic bucket was 276 ppm, and after deactivating it with sodium thiosulfate, it was discarded.

Example 3 A bag made of 100 g/m'' nonwoven fabric made of nylon was housed along its inner circumferential surface, and lauryldimethylbenzylammonium chloride 200 ppI11 was contained inside the bag.
Hibitengluconate 500-11000pp, p
A lOoβ stainless steel vat with casters containing an aqueous solution of a sterilizing disinfectant at 40° C. was prepared, and the surgical instruments after the surgery was put into it.

On the other hand, a bag made of a 70 g/m'' nylon nonwoven fabric was housed along its inner circumferential surface, and inside it contained 200 ppm of sodium alkinobenzenesulfonate, 40 ppm+ of lauryl ethoxylate, and 500 ppm of sodium hypochlorite, pH 7.0. A 100C polyethylene bag containing an aqueous solution of a sterilizing disinfectant at 35°C was prepared, and body fluids, blood-stained gauze, and a degreased surface were immediately poured into it.

In each case, one hour after the final injection, the bag was lifted to allow the sterilizing and disinfecting solution inside to leak out, and then the bag containing the surgical instruments was cleaned in a predetermined manner. Additionally, bags containing gauze and absorbent cotton were incinerated in an incinerator.

Note that alkylbenzene sulfone was added to inactivate lauryl dimethylbenzene ammonium chloride and hibiten gluconate.

To inactivate sodium hypochlorite, sodium thiosulfate was added under sulfuric acid.

Patent applicant: Nirapon Tea Ball Co., Ltd. Agent: Akio Naka

Claims (1)

[Claims] A bag-shaped nonwoven fabric is laid along the inner periphery of a water-impermeable container, and an aqueous solution of a sterilizing disinfectant containing a surfactant is stored inside the bag, and the object to be treated is placed inside the container. ,
A sterilization method characterized in that after sterilization, a bag-shaped nonwoven fabric containing an object to be treated is taken out and treated.