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Difference between Moist Heat Sterilization & Dry Heat Sterilization

There are different processes available through which you can sterilize different materials. To be able to choose the right sterilization process, one must know what method suits the material in question more. You can’t sterilize materials that are heat sensitive with autoclaves. Similarly, you can’t use filter sterilization with chemicals having a greater microbe size when compared with the membrane pores of the filter.

So, to use the dry and the moist heat sterilization in an effective manner, you must understand the difference between both of them.

Moist Heat Sterilization

Water at high pressure level is used in moist heat sterilization. Autoclave is the instrument in which this process is carried out. The temperature of the steam in this method is lower when compared with dry heat sterilization, but the high pressure helps with effective sterilization to take place.

The structural proteins and the organism’s enzymes are destroyed through moist heat. This results in the death of the organisms. Moist heat method is used for heat sensitive materials and materials through which steam is permeable. Culture media is also sterilized through moist heat sterilization.

Through moist heat sterilization, the most resistant of the spores require a temperature of 121°C for around half an hour. It is a more effective method when compared with dry heat sterilization. This can be supported by the fact that through moist heat, sterilization can be achieved at lower temperatures in a shorter duration.

These were the main difference between the dry and the moist heat sterilization methods. If you want to sterilize materials that are more heat sensitive when compared with both these methods, you should go for filter sterilization or chemical decontamination methods.

Dry Heat Sterilization

In dry heat sterilization, dry heat is used for sterilizing different materials. Heated air or fire is used in this process. As compared to the moist heat sterilization, the temperature in this method is higher. The temperature is usually higher than 356° F or 180 °C.

Dry heat helps kill the organisms using the destructive oxidation method. This helps destroy large contaminating bio-molecules such as proteins. The essential cell constituents are destroyed and the organism dies. The temperature is maintained for almost an hour to kill the most difficult of the resistant spores.

Things such as glassware, metal instruments, paper wrapped things and syringes are effectively sterilized through dry heat. The materials used in these things are heat resistant or it can be said that they are heat stable. Powders impermeable to moisture and anhydrous oils and fats can also be sterilized using dry heat sterilization.

For further reading or services

For Bioburden, Sterility test, Dry heat or moist steam heat services https://www.gibraltarlabsinc.com/request-a-quote/
 For Sterile, stoppers, seals and glass vials suitable for cGMP https://www.gibraltarlabsinc.com/sterikit-product/
Different types of sterilization methods https://www.gibraltarlabsinc.com/some-of-the-different-types-of-sterilization-methods-and-their-advantages/
Many different techniques of medical instrument sterilization https://www.gibraltarlabsinc.com/many-different-techniques-of-medical-instrument-sterilization/
Importance of medical sterilization https://www.gibraltarlabsinc.com/the-importance-of-medical-sterilization/
How the sterilization dose is calculated https://www.gibraltarlabsinc.com/understanding-sterilization-temperature-sterilization-exposure-time-developed/



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5 Reasons to Choose Dry Heat Sterilization for Your Equipment

Though autoclaves are available for professionals to sterilize their containers, equipment and instrument with steam heat, another method to serve the purpose well is dry heat sterilization. It is a process of sterilization which uses hot air rather than steam. Dry heat sterilizers are usually made of carbon steel or stainless steel. They are mostly used for the sterilization of chemical and biological contaminants.

Taking sterilization services from the professionals in the field, especially in dry heat will lead you to enjoy the following benefits from it. Five of the most important benefits are explained below.

1.     Cost Effectiveness

Since there is no need to use energy and water in the sterilization process, the requirement for using sterilization cycle is completely eliminated. This way, professionals can ensure that they can reduce a large amount of costs in sterilization of surgical instruments. Though sterilizing equipment with the help of steam heat can bring corrosion and rust, dry heat does not affect the life expectancy of the equipment.

2.     Less Time Required To Cool Down

High temperature and pressure sterilizers require a lot of time to cool the sterilized equipments. This is because taking the instruments out from the sterilizer can be dangerous for the operators. However, sterilization done by using dry heat requires less time to cool those instruments. This way, medical professionals and others do not have to wait for prolonged periods before reusing them.

3.     Timely

Any process of sterilization goes through three main steps, i.e. ramping, heating, as well as cooling. All of these sterilization cycles take a considerable amount of time. In addition, the variations in time also depend on which method you want to use for sterilization of surgical instruments. When it comes to taking dry heat as the method of sterilization, it is comparatively timely.

4.     Control Options

There are various dry heat sterilizers that provide certain control options for those who operate it. These options also include the flexibility for them. Asking professionals in this field can help you learn more about the control options because these options directly influence the effectiveness of these sterilization services.

Since it deals with the use of dry heat, many industries can look for web-based support for the sterilization of their equipment. Due to the variety in control options, this option has become preferable among many.

5.     Achievement of Workplace Goals

At the end of the day, it is all about accomplishing workplace goals. This is especially true for those who have a regular requirement to use sterilized instruments as a part of their profession. Therefore, sterilizing these instruments using dry heat can prove to be effective as compared to the traditional methods of sterilization.  Dry heat sterilization and moist heat sterilization also share one important additional benefit, they are considered safer. Sterilization is achieved by controlled exposure to heat unlike terminal sterilization involving irradiation by powerful gamma rays or by sterilization by exposure to poisonous gas [e.g., ethylene oxide gas].