RU136718U1 - DEVICE FOR STERILIZATION OF MEDICAL INSTRUMENTS - Google Patents

Abstract

1. A device for sterilizing medical instruments, containing a microwave energy source connected to a volume resonator, a microwave waveguide output, a container with a working medium made of heat-resistant material transparent for microwave fields, mounted inside the cavity on a height-adjustable stand, characterized in that an additional container is introduced from a heat-resistant material transparent for microwave fields for sterilized instruments, having a lid and an opening in the lower part for filling and draining Static preparation medium and arranged within the container with the medium to form a gap between its bottom and the additional bottom konteynerov.2. A device for sterilizing medical instruments according to claim 1, characterized in that the additional container has protrusions on the outer surface of the upper part, resting on the side walls of the container with the working medium. The device for sterilizing medical instruments according to claim 1, characterized in that the additional container has protrusions at the bottom, resting on the bottom of the container with the working medium.

Description

The utility model relates to the field of medical technology, in particular to the sterilization of medical instruments.

Known devices and methods for sterilizing materials and tools using microwave fields. For example, in US Pat. No. 5,019,344 of 05/28/91, an instrument enclosed in a bag that is transparent to the microwave field is placed in a microwave oven in which the disinfectant solution is located. The sterilization effect is achieved due to the total thermal effect, disinfecting effect and the action of microwave fields. Sterilization time is 20 minutes.

This technical solution has the following disadvantages: the presence of sparking on the tips of some tools and overheating of the tools, which leads to their damage; chemical reaction of the instrument with a disinfectant solution also leads to damage to the instruments; the need for strict dosage and the need for a large amount of disinfectant solution, which is difficult to provide in the field; the need to use each time special sealed bags, and therefore, devices that seal these bags.

A device for the rapid sterilization of medical instruments in microwave fields is described in (RF patent No. 2130319 from 07.27.1997). The device contains a heat-resistant transparent container for microwave fields, a container (capacity) for placing tools. The container is installed in the microwave cavity. As a working medium in this technical solution, ordinary water is used in such an amount that the water only partially covers the tools. This technical solution allows to reduce the sterilization time to 5-10 minutes, eliminates the sparking of instruments, their overheating and chemical reactions with a disinfectant solution.

The disadvantage of this device is that the container in which the tools are placed does not have an adjustment of its height position, so the location of the container relative to the input microwave window of the working resonator cannot be optimized, which increases the processing time. Another disadvantage of this method is that due to the insufficient amount of natural salts in ordinary water in a number of modes, the sterilization time during processing exceeds 5 minutes.

A device for sterilizing medical instruments in microwave fields is also known (RF patent No. 216150 publ. 06.07.1999). The invention solves the problem of sterilizing only dielectric or partially dielectric materials using electromagnetic radiation in the microwave range. The device contains a microwave radiation source, a cavity resonator, and a microwave magnetron is used as a microwave radiation source, the operating frequency of which differs by no more than 20% from the natural resonant frequency of the cavity resonator, inside which the radiating element of the microwave magnetron is located. Destruction of microorganisms, such as bacteria, spores or viruses, occurs due to an increase in the electromagnetic field inside the resonator and the absorption of microwave energy by microorganisms.

The main disadvantage is the inability to sterilize metal medical instruments. Another serious drawback is the need to fill with gas with a high breakdown threshold (for example, freon or SF6 gas) at an increased pressure of the resonator itself to ensure its necessary electric strength. In addition, the dimensions of the material to be sterilized are limited, and the material itself must be moved during sterilization inside the resonator in the antinode region, the locations of which are not so easy to determine.

Closest to the main features of the claimed utility model is (RF patent for utility model No. 45271 publ. 12/14/2009, "Device ultrafast sterilization of medical instruments"). The invention solves the problem of sterilization of metal medical surgical, dental instruments, allowing to reduce the sterilization time to values not more than 5 minutes.

The structure of an ultrafast sterilization device for medical instruments, in addition to a microwave energy source (magnetron) and a resonator, includes a microwave waveguide output, as well as a container for sterilized instruments filled with a working medium and made of heat-resistant material transparent to microwave fields. The container is installed inside the volume resonator on a height-adjustable stand with the possibility of combining the symmetry axes of the waveguide output of microwave energy connected to the volume resonator and the volume occupied by the sterilized instruments in the container. The stand is made in the form of a block of gaskets made of a material that is transparent to microwave fields, and a water-salt solution is used as a working medium, taken from the calculation of 1-5 grams of sodium chloride per liter of water, which allows to increase the conductivity of the working medium, the loss coefficient, and means the amount of microwave power absorbed by the active medium.

The advantage of an ultrafast sterilization device for medical instruments is the short sterilization time, reliable destruction of all known bacteria, spores and viruses.

However, the authors' experience with such a device revealed a number of shortcomings. In particular, after sterilization, sterilized instruments must be removed again from the container with a high temperature of the working medium using sterile instruments (tweezers). Subsequently, sterilized instruments must be packaged in sterile wipes, sterile paper with a further possibility of their medical use. The process of removing sterilized instruments from a high temperature environment is not safe. In addition, when removing sterilized instruments and their packaging, there is a danger of turning them into non-sterile due to the influence of the surrounding air environment, employees and other factors.

The proposed utility model is based on the task of developing a safe and easy-to-use device for sterilizing metal medical surgical and dental instruments in a short time, which ensures the sterile state of the instruments after removing them from the resonator. The device should be simple, easy to use in the field, in numerous clinics and hospitals, dental offices, hairdressers, affordable for its price.

The problem is solved in that the ultrafast sterilization device for medical instruments contains a microwave energy source connected to a volume resonator, a waveguide output of microwave energy, a container with a working medium made of heat-resistant material transparent for microwave fields, mounted inside a volume resonator on an adjustable stand height. New is the introduction of an additional container made of heat-resistant material, transparent for microwave fields, for sterilized instruments, having a lid and a hole in the lower part for filling and draining the working medium and installed inside the container with the working medium to form a gap between its bottom and the bottom of the additional containers .

In addition, the additional container has protrusions on the outer surface of the upper part, resting on the side walls of the container with the working medium, and also protrusions on the bottom, resting on the bottom of the container with the working medium.

The proposed technical solution is illustrated by the drawing - figure 1, which shows a General view of the device ultrafast sterilization of medical instruments. The positions of the drawing indicated:

1 - magnetron;

2 - waveguide output of microwave energy;

3 - volume resonator;

4 - container for sterilized instruments;

5 - hole in the container for sterilized instruments;

6 - container cover for sterilized instruments;

7 - container handles for sterilized instruments;

8 - working environment;

9 - axial line of the waveguide output of microwave energy and the axis of symmetry of the volume occupied by sterilized instruments;

10 - container with a working environment;

11 - protrusions at the bottom of the container for sterilized instruments, based on the bottom of the container with the working medium;

12 - block gaskets made of transparent material for microwave fields. The device consists of a microwave energy source - magnetron 1, with a waveguide output of microwave energy 2, through which the magnetron is connected to the volume resonator 3. Two containers are located in the resonator 3, one container 4 for sterilized instruments has an opening in the lower part 5 for draining (filling) the working medium, the protrusions on the bottom 11, the cover 6 and the protrusions on the outer surface of the upper part (handles) 7. Sterilized instruments are placed in the container 4. The container 4 with sterilized instruments is placed in another container 10 of a slightly larger size with a working medium, and a gap is formed between the bottom of one and the other containers due to protrusions 11 on the bottom of the container 4 or handles 7 on the outer surface of the upper part of the container 4, which are supported on the side the walls of the container 10 with the working environment. When the container 4 with the hole and the instruments to be sterilized is immersed, the working medium in the larger container 10 fills the container with the instruments to be sterilized through the hole 5. Both containers are made of heat-resistant material, transparent to microwave fields, and are mounted inside the cavity 3 on a height-adjustable stand 12. The stand 12, is made in the form of a block of gaskets made of a material that is transparent to microwave fields, allowing to combine the axis of symmetry of the waveguide output of microwave energy with the axis of symmetry of the volume, occupying sterilized instruments. As the working medium 8, water-salt solution was used, taken at the rate of 1-5 grams of table salt per liter of water. The working medium 8 fills the container 4 with sterilized instruments, since both container-communicating vessels through the hole 5.

The device operates as follows. In a larger container 10 with a working medium 8, a container 4 is placed with an opening 5, protrusions on the bottom 11, a lid 6 and sterilized instruments. The working medium 8 from the external container 10 through the hole 5 of the container 4 with sterilized instruments penetrates into the latter, due to the gap between the bases of the containers formed by the protrusions on the bottom 11 and the holders (handles) 7. Both containers are placed in a microwave resonator similar to a household resonator Microwave oven with a power of 600-800 watts. The sterilization process can last up to 5 minutes.

When sterilized by microwave fields, the internal structure of bacteria is destroyed.

After sterilization, the containers are removed from the cavity. The container 4 with the lid 6 closed with sterilized instruments rises with the handles 7 upward from the external container of a larger size 10. In this case, the working medium 8 is poured out of the container 4 with sterile instruments through the opening 5 and remains in the larger external container 10. Thus, in the container sterile instruments remain with the lid, not requiring their removal from the working environment and suitable for medical use. This provides a solution to the sterile state of the instruments after removing them from the resonator.

The study of the feasibility and effectiveness of sterilization in the proposed device was carried out by the authors in the same way as in the patent of the Russian Federation for utility model No. 45271 dated 12/14/2009 “Device for ultrafast sterilization of medical instruments”.

Studies have shown that effective and high-quality microwave sterilization of metal surgical instruments (angular bite, nose expander, spatula, pean, burs, diamond discs, scalpel blades, dental scalpel, plug-ironer, etc.) is achieved with the help of the proposed utility model in time no more than 5 minutes. Sterilized instruments maintain a sterile state after removing them from the resonator and conducting research.

An example of using the device.

Medical instruments: angular bite, nasal expander, putty knife, wound hook, gaiters, thin peans, previously infected with B. sputilis 468 spore-bearing bacteria culture, were placed in a heat-resistant glass container of 1000 milliliters with a hole and a lid. Another larger container was filled with a working medium and a container was placed in it with an opening sterilized by instruments, which was supported by protrusions on the bottom of the larger container and its vertical walls. The working medium penetrated from the external container into the container with sterilized instruments through the opening of the latter. Both containers were placed using gaskets transparent for microwave fields so that the instruments coated with the working solution were located in the middle of the resonator along the longitudinal axis of the waveguide connecting the magnetron and the resonator. The type of microwave oven can be different, for example, SP-23, its microwave power is 700 watts and the microwave frequency is 2450 MHz. Sterilize instruments for less than 5 minutes. As a result, the instruments are completely sterilized. Their removal consists only in lifting the container with sterile instruments with the help of holders (handles) from the second, slightly larger container. In this case, the working solution remains in the second larger container, the sterilized instruments become dry, the possibility of their contamination by personnel or the environment is excluded.

Thus, the proposed device for ultrafast sterilization of medical instruments retains the advantages of utility model No. 45271 dated 12/14/2009, “Device for ultrafast sterilization of medical instruments” and eliminates the negative effects that occur when sterilized instruments are removed from a high temperature working environment. When sterile instruments are removed from the working solution, there is no danger of their contamination and becoming non-sterile due to the influence of employees, the surrounding air environment and other factors. The process of removing the container becomes more secure.

Claims (3)

1. A device for sterilizing medical instruments, containing a microwave energy source connected to a volume resonator, a microwave waveguide output, a container with a working medium made of heat-resistant material transparent for microwave fields, mounted inside the cavity on a height-adjustable stand, characterized in that an additional container is introduced from a heat-resistant material transparent for microwave fields for sterilized instruments, having a lid and an opening in the lower part for filling and draining Static preparation medium and arranged within the container with the medium to form a gap between its bottom and the bottom of the additional container. 2. The device for sterilization of medical instruments according to claim 1, characterized in that the additional container has protrusions on the outer surface of the upper part, resting on the side walls of the container with the working medium. 3. The device for sterilization of medical instruments according to claim 1, characterized in that the additional container has protrusions at the bottom, resting on the bottom of the container with the working medium.

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