Correctly identify discoloration of chemical indicator cards

2022/08/27

After a proper sterilization process, the instruments in the sterilization chamber should be sterile, but when the instruments are removed from the sterilization chamber, the outdoor air contains dust particles and microorganisms

01 Requirements for sterilization packaging

Why pack

After a proper sterilization process, the instruments in the sterilization chamber should be sterile, but when the instruments are removed from the sterilization chamber, the outdoor air contains dust particles and microorganisms

If the device is not packaged, the device will become contaminated very quickly

In addition, sterile items are usually stored for a period of time and sent to the department where they are used, so the instruments must be properly packaged to prevent recontamination

Sterilization Packaging Management Requirements

Packaging purpose:

Continue the effect after sterilization to ensure that sterile instruments and items can remain sterile before use.

Strict packaging requirements:

Surgical instruments are packaged in a closed way, usually with 2 layers of packaging materials. Special tapes are used for closed packaging, and the packaging is tightly sealed.

The weight of the equipment package does not exceed 7 kg, and the weight of the dressing package does not exceed 5 kg;

The package volume of the pre-vacuum and pulse pressure steam sterilizer shall not exceed 30cmx30cmx50cm.

The sterilization package should be clearly marked and traceable; label the item name, packager, sterilizer number, sterilization batch, sterilization date, expiration date, etc.

Types of medical packaging materials

: Storage tanks, textiles (cotton), disposable medical non-woven fabrics, disposable paper-plastic packaging, rigid packaging containers

Different packaging materials - storage tanks

Stainless steel tanks and tanks, which rely on manual switching before sterilization, cannot be used as sterile barrier systems.

Different packaging materials - cotton cloth

Advantages: good permeability, strong tensile strength, relatively economical

shortcoming:

Poor microbial barrier performance

Any foreign object can cause inflammation at the surgical incision site

Deformation of fibers after repeated cleaning

Requires "one use and one wash"

Small holes and holes are difficult to detect with the naked eye

Indoor air pollution caused by the release of cotton dust

Short shelf life after package sterilization

Different packaging materials - medical non-woven packaging

Definition: It consists of oriented or random fibers. It is called cloth because of its appearance and certain properties. A single-use fabric made from fused fibers, not threads.

advantage:

Does not contain toxic substances

Good hydrophobicity, not easy to cause wet pack

Has a special structure to avoid breakage

The shelf life after sterilization is 6 months

shortcoming:

Harder than cotton, not as strong as cotton

Scope of application: It is used for pressure steam sterilization and ethylene oxide sterilization. Because of its weak tear resistance and thinness, it is suitable for sterilization of relatively light and sharp instruments.

Different packaging materials - disposable paper and plastic bags

advantage:
The contents of the bag are visible
Good microbial barrier function Good impermeability
Suitable for small, irregular instruments
Can be used for high pressure steam, ethylene oxide sterilization
shortcoming:
The clinical department stores spare paper-plastic sterile bags, which are prone to wrinkles and cracked seals
Poor dryness when packing hard materials, and some appear on the inner plastic surface
Validity period: 6 months
Sharps are easy to pierce the packaging of paper plastic bags

Different packaging materials - rigid packaging containers

advantage:

reusable

Good bacterial barrier

better device protection

ensure drying effect

shortcoming:

expensive

02. Classification and selection of disinfection and sterilization

High temperature sterilization:
1. Pressure steam sterilization: two kinds of pots: lower exhaust and pre-vacuum
2. Dry heat sterilization
Low temperature sterilization:
1. Ethylene oxide sterilization (EO)
2. Hydrogen peroxide plasma sterilization
3. Low temperature formaldehyde sterilization

Sterilization classification and selection

Sterilization: Kill or remove all microorganisms in the environment by physical or chemical methods.

Sterilization method classification: steam sterilization, dry heat sterilization, moist heat sterilization;

Chemical gas sterilization: ethylene oxide sterilization, low temperature plasma sterilization.

Use physical or chemical methods to sterilize and sterilize according to the properties of the items.

·Physical sterilization method - pressure steam sterilization should be the first choice for sterilization of heat-resistant and moisture-resistant articles, such as surgical instruments and articles, various puncture needles, etc.

Chemical sterilization methods - low temperature sterilization methods, such as ethylene oxide sterilization, hydrogen peroxide plasma sterilization, etc.

Dry heat sterilization is preferred for oil, powder, paste, etc., such as Vaseline gauze, etc.

03. Identification of various types of current chemical indicator cards

Sterilization Indicator Tape Definition and Use

Definition: It is made of crepe paper as substrate, coated with color-changing ink as sterilization indicator, and back coated with pressure-sensitive adhesive. The indicator tape used for chemical monitoring outside the pressure steam sterilization package. When a certain sterilization condition is reached at 121°C for 20 minutes or 132°C for 3 minutes, the chemical indicator stripes on the crepe paper backing will turn from light yellow to black.

use:

1. It is used to indicate whether the item package has been processed by the pressure steam sterilization process.

2. If the discoloration is uneven or incomplete, it can indicate that the package has not been sterilized in accordance with the conditions.

3. Wrap the package (if not using wrapping tape).

Definition and Use of Sterilization Seal Labels

Definition: It is made of medical crepe paper or label paper, coated with color-changing ink as sterilization indicator, and back coated with pressure-sensitive adhesive. The indicator tape used for chemical monitoring outside the pressure steam sterilization package. When a certain sterilization condition is reached at 121°C for 20 minutes or 132°C for 3 minutes, the chemical indicator stripes on the crepe paper backing will turn from light yellow to black.

use:

1. It is used to indicate whether the item package has been processed by the pressure steam sterilization process.

2. If the discoloration is uneven or incomplete, it can indicate that the package has not been sterilized in accordance with the conditions.

3. Sterilization information can be recorded (operator, sterilization validity period, name of items in the package, pot order, etc.).

Definition and use of the indicator card in the sterilization package

Definition: It is a rectangular paper-shaped structure, printed with heat-sensitive dyes, and consists of cardboard, standard color blocks and indicator color blocks. Place the pressure steam sterilization indicator card in the center of the package of the items to be sterilized. After a sterilization cycle (132°C, 3min), the color of the indicator color on the card reaches or is deeper than the color of the standard color. The reached temperature and temperature duration have met the required conditions for sterilization; if it is lighter than the standard color block, it means that the temperature and temperature duration of the action do not meet the sterilization requirements. For packages that "do not meet the sterilization requirements", they cannot be used and should be re-sterilized.

use:

1. It is used to indicate whether the item (instrument, dressing, etc.) has been processed by the pressure steam sterilization process.

2. If the discoloration is uneven or incomplete, it can indicate that the item has not been sterilized in accordance with the conditions.

Plasma Sterilization Chemical Indicator Card

Definition: It is a rectangular paper-shaped structure, printed with heat-sensitive dyes, and consists of cardboard, standard color blocks and indicator color blocks. Place the indicator card in the center of the package of items to be sterilized. After a sterilization cycle, the color of the indicator color block on the card reaches or is deeper than the color of the standard color block, indicating that the required conditions for sterilization have been met; if it is lighter than Standard color blocks, indicating that the sterilization requirements have not been met. For packages that "do not meet the sterilization requirements", they cannot be used and should be re-sterilized.

use:

1. It is used to indicate whether the item has been treated with hydrogen peroxide low temperature plasma sterilization process.

2. If the discoloration is uneven or incomplete, it can indicate that the item has not been sterilized in accordance with the conditions.

3. Suitable for low temperature plasma sterilizer.

Requirements for chemical monitoring of sterilization quality:

Outside the package: each item to be sterilized should be covered with an indicator tape or an indicator label. After a sterilization cycle, observe its color change to indicate whether it has been sterilized;

Inside the bag: use the chemical indicator card, place it in the most difficult part of sterilization, and judge whether it meets the sterilization qualification requirements by observing the color change of the chemical indicator.

In the use of sterile items, what conditions are prohibited from using:

beyond the specified validity period;

The packaging is loose or the wrapping cloth has holes;

The wrapping cloth is damp, stained, watermarked or water-stained;

Indicates that the tape is not discolored or discolored unevenly;

Sterilized instruments have stains and rust stains;

Doubt about sterilization process and quality.

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