CN1234420C - Sterilizing method for inner surface of inner pipeline of medical instrument - Google Patents

Abstract

The present invention discloses a method for sterilizing the inner surfaces of pipes in medical instruments. Ultrasonic oscillation and corona discharge are combined to generate water mist with the O3 concentration of 15 to 20 ppm and the diameter of 1 to 5 micrometers, and the technology of O3 treatment of discharge gas and the axial flow heat exchange drying technology are also adopted to complete sterilization, deodorization, drying and tail gas treatment once. After being dissolved in the water mist, O3 has the advantages of uniform distribution, favorable diffusibility and no dead angle, and O3 is suitable for various pathogenic microorganisms and has a favorable killing function on colon bacilli, salmonellae, staphylococcus aureus, viruses of hepatitis B and hepatitis A, fungi and other micro organisms. The sterilizing effect of O3 is equivalent to that of oxygen acetic acid and is higher than that of formaldehyde, and the sterilizing power of O3 is one time stronger than that of chlorine. The sterilizing speed ratio of O3 is 600 to 3000 times higher than that of chlorine, and bacteria can be killed even in several seconds. After O3 is dissolved in water, the sterilizing power becomes stronger, the sterilizing speed becomes higher, and no residual secondary pollutants harmful to human bodies exist. The method of the present invention is suitable for sterilizing the inner surfaces of pipes in various respirators, anesthetic machines, hemodialysis machines, etc.

Description

A kind of sterilization method of inner surface of inner pipeline of medical instrument

Technical field

The present invention relates to the sterilization method of Medical Instruments, particularly a kind of sterilization method of inner surface of inner pipeline of medical instrument.

Background technology

At present, traditional sterilization method mainly contains three kinds of approach: 1) adopt the ultraviolet photochemistry sterilization; 2) use various chemical reagent (comprising iodine tincture, ethanol, oxirane and hydrogen peroxide etc.) sterilization; 3) high pressure hyperpyrexia sterilization.These methods have been used for the sterilization of the various medical spaces of clinical medicine, Medical Instruments, medical supplies and operation process by routine, its safety and reliability are confirmed by secular practice.But in scientific research with also have many instruments clinically, according to the needs of its function, instrument internal is made up of complicated gas or fluid pipeline mostly, and instrument costliness mostly.For the sterilization of this part instrument, as using disinfection by ultraviolet light, its subject matter is that penetration power is little, and Disinfection Effect is poor, and especially the inwall to the instrument internal pipeline produces bactericidal action hardly, does not have the disinfectant effect.If adopt chemical reagent to carry out disinfection, as the formaldehyde fumigation method, the one, troublesome poeration, fumigation time is long, the 2nd, also can be with secondary pollution, human body is had certain harm, and routine is done a formaldehyde and is heavily steamed sterilization, generally needs 8 hours, and the formaldehyde residue can be difficult to clean attached to each corner of instrument, the more important thing is, because the pipeline complexity can not thoroughly be killed the antibacterial of the inwall of instrument internal pipeline.And this part instrument can not adopt high pressure hyperpyrexia sterilization again.More than three kinds of traditional sterilization methods all can not carry out effective thorough disinfection to this quasi-instrument, can influence the test result of this kind equipment for a long time or cause medical cross infection.As clinical various types of respirators and anesthetic machine commonly used, when specifically using to patient, except that outside (comprising corrugated tubing) can carry out the normal cleaning and sterilizing, inner complicated breather line all can not carry out routine disinfection, and this is the indeterminable difficult problem of traditional for many years sterilization method.

Summary of the invention

At defective or the deficiency that above-mentioned prior art exists, the object of the present invention is to provide a kind of sterilization method of inner surface of inner pipeline of medical instrument.

To achieve these goals, method of the present invention adopts O ₃Be prepared into O after the atomized water microgranule is tied mutually ₃Mist is then with O ₃Mist input Medical Instruments internal pipeline system is at high concentration O ₃Oxidation under, be directly inputted in the pipeline, the instrument internal pipe surface is carried out disinfection; Comprise the following steps:

1) preparation of atomized water: use supersonic generator, producing diameter is the atomized water of the fine mist of 1 μ m-5 μ m;

2) O ₃Preparation: utilize ozonator, obtain the ozone that concentration is 30ppm～40ppm;

3) with the atomized water and the step 2 of step 1) preparation) in the ozone combination of making simultaneously, obtain containing the water smoke of ozone concentration＞15ppm;

4) connect the container that 500ml metal ion water is housed of 2 polyphones at the exhaust end of the instrument pipeline that is sterilized;

5) water smoke that will contain ozone is then imported the inlet end of the internal pipeline of Medical Instruments, and makes the O that contains from the pipeline discharge ₃The container of metal ion water of tail gas by polyphone, with the O in the tail gas ₃Fully enter atmosphere after the dissolving;

6) after sterilization finishes, with axial flow heat exchanger heats air to 40 ℃～50 ℃, the air input instrument interior conduit after will heat then, the water smoke that retains in the elimination pipeline.

The present invention utilizes pure oxygen under the high voltage strong electric field condition, and electronics is quickened back and gas molecule collision, O in 10ns by strong electric field power ₂Decompose generation antozone (O), only in tens of nanoseconds, oxygen atom combines with oxygen molecule and forms O ₃Reuse ultrasonic atomizatio method becomes water the O of the high concentration of water smoke and the generation of corona method ₃The O that mixes back formation＞15ppm ₃Mist is then directly with O ₃Mist input Medical Instruments internal pipeline system keeps O from the tail gas of instrument internal pipe outlet ₃Concentration＞5ppm can reach the purpose of thorough disinfection.

Description of drawings

Fig. 1 is a flow chart of the present invention.

The specific embodiment

In order clearly to understand the present invention, provide technology path (Fig. 1) below in conjunction with the inventor and be further described.

(1) the atomized water preparation utilizes supersonic generator output high-frequency electrical energy, make bottom of gullet crystal transducer generation ultrasound wave acoustic energy, acoustic energy has shaken the sound passing membrane of atomization tank bottom, act on the water in the atomization tank, the surface tension and the inertia of water are changed, make water become diameter, form the vaporific atomized water of water cloud in 1-5 μ m fine fog.

(2) O ₃The parallel plate type ozone generating-device is used in preparation under normal pressure, medical oxygen gas is produced corona discharge generation high concentration O through the effect of alternation high voltage electric field ₃Advantage is that volume is little, simple in structure, functional, easy-maintaining.

(3) vent gas treatment is utilized O ₃Very easily water-soluble characteristics feed tail gas in the water that contains metal ion of 500ml * 2, will remain O ₃Soluble in water, make it reach environmental protection standard (O ₃＜0.5mg/m ³) the back discharging.

(4) dry with the mode heat drying air of axial flow heat exchanger with heat convection, then dry air (40～50 ℃) is imported the interior conduit of instrument, thereby reached rapid elimination water smoke and exsiccant effect.

The O that (1) and (2) is made simultaneously ₃Combine with atomized water, its proportion control is at O ₃Concentration is＞15ppm, then with O ₃The internal pipeline inlet end of mist input Medical Instruments, the container that 500ml metal ion water is housed at 2 polyphones of its exhaust end connection will come out to contain O from the exhaust end of pipeline ₃The container of metal ion water of tail gas by polyphone, with the O in the tail gas ₃Fully enter atmosphere again after the dissolving.

Sterilization beginning back 2min closes the ultrasonic atomizatio generator earlier, and 5min closes ozonator, continues to be blown into dry air (40～50 ℃ of air themperatures) 3min again, and 10min finishes functions such as sterilization, deodorization and drying altogether.

In implementation process, with O ₂Be prepared into high concentration O by parallel plate type (or tubular discharge or utilize quartz ampoule glass or heat resistant glass, pottery, rustless steel etc. lure electric body) ozonator ₃Mix (O with water through the water cloud mist that supersonic generator is transformed into ₃Concentration＞15ppm), connect the inlet end of Medical Instruments, at water smoke and O ₃With O ₂Enter the Medical Instruments internal pipeline under the common pressure, exhaust end contains O with what internal pipeline came out ₃The container that 500ml metal ion water be housed of tail gas by 2 polyphones after enter atmosphere again.Sterilization beginning back 2min closes the ultrasound atomizer generator earlier, closes the parallel plate type ozonator behind the 5min, continues to be blown into to continue to be blown into dry air (40～50 ℃ of air themperatures) 3min more again, and 10min can finish functions such as sterilization, deodorization and drying altogether.

O ₃Mist has a wide range of applications in medical domain, and major advantage is aspect the sterilization in instrument pipeline:

(1) the strong the present invention of diffusivity utilizes O₃With water smoke mixture, O₃Be dissolved in the water smoke, CONCENTRATION DISTRIBUTION is even, has improved O₃Bactericidal effect, diffusivity is good, no dead angle.

(2) the strong O of sterilizing power₃Mist is wide spectrum, efficient, quick sterilization agent. Its bactericidal effect and fluoroacetic acid are suitable, are better than formaldehyde, and sterilizing power doubles than chlorine, sterilization speed than the fast 600-3000 of chlorine doubly, even killing bacteria in seconds. Work as O₃Soluble in water, its sterilizing power is stronger, faster. The carrying out property of disinfection function of general disinfectant, accumulation property, and O₃Mist is rapidly, in case O₃Smelly concentration reaches certain threshold value, and its sterilization is instantaneous to be finished.

(3) fungicidal spectrum extensively is fit to multiple pathogenic microorganisms, and the multiple-microorganisms such as Escherichia coli, salmonella, staphylococcus aureus and hepatitis a and b virus, fungi are all had good killing action.

(4) the good O of the feature of environmental protection₃Half-life in empty G﹠W is 20～35min, and the byproduct after decomposing in water is O₂, O when having pollutant to exist₃Decomposition rate faster. O₃The important advantage of burn-off poison is to the not residual any harmful secondary pollution material of environment, water, air, ice, utensil and food.

(5) the good O of deodorization₃Mist can with ammonia, hydrogen sulfide, methyl mercaptan, dimethyl sulfide compound, methyl disulfide etc., chemical reaction can take place with them in ozone, generates material nontoxic, odorless.

(6) economic security O₃The mist preparation is to utilize conventional medical O₂, water and air, cheap, need not preserve, easy to use, safe and reliable.

Claims (3)

1. the sterilization method of an inner surface of inner pipeline of medical instrument is characterized in that, adopts ozone and atomized water to contain the water smoke of ozone in conjunction with formation to the inner surface of pipeline disinfection; Comprise the following steps:

1) preparation of atomized water: use supersonic generator, producing diameter is the atomized water of the fine mist of 1 μ m-5 μ m;

2) O ₃Preparation: utilize ozonator, obtain the O that concentration is 30ppm～40ppm ₃

3) with above-mentioned steps 1) atomized water and the step 2 of preparation) in the O that makes simultaneously ₃In conjunction with, obtain containing O ₃The water smoke of concentration＞15ppm;

4) connect the container that 500ml metal ion water is housed of 2 polyphones at the exhaust end of the instrument pipeline that is sterilized;

5) will contain O then ₃The inlet end of internal pipeline of water smoke input Medical Instruments, and make from what pipeline was discharged and contain O ₃The container of metal ion water of tail gas by polyphone, with the O in the tail gas ₃Fully enter atmosphere after the dissolving;

6) after sterilization finished, with axial flow heat exchanger heats air to 40 ℃～50 ℃, the air input instrument interior conduit after will heat then carried out drying, the water smoke that retains in the elimination pipeline.

2. the sterilization method of inner surface of inner pipeline of medical instrument as claimed in claim 1 is characterized in that, described pipeline is discharged contains O ₃Tail gas in ozone concentration＞5ppm.

3. the sterilization method of inner surface of inner pipeline of medical instrument as claimed in claim 1 is characterized in that, described sterilization begins back 2min and closes supersonic generator earlier, closes ozonator through 5min, continues to be blown into dry air 3min again.

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