Autoclave
Medical autoclaves are specialized equipment that uses high-temperature, high-pressure saturated steam to sterilize medical devices, culture media, and other items. They are widely used in hospitals, laboratories, and the pharmaceutical industry, effectively killing bacteria, viruses, and spores.
Sterilization Principle and Key Parameters: Medical autoclaves increase the boiling point of water by pressurizing it, generating high-temperature steam above 100°C, which destroys the protein and nucleic acid structures of microorganisms.
Common Sterilization Conditions:
Temperature and Pressure: Typically 121°C (0.1MPa) or 134°C (approximately 0.2MPa).
Maintenance Time: 15-30 minutes at 121°C, and 4-5 minutes at 134°C, depending on the type of item.
Special Items: Biohazardous waste or large-volume loads may require extended sterilization times (over 60 minutes), requiring validation with biological indicators. Encyclopedia
Core Advantages: Moist heat sterilization has strong penetrating power and is more efficient than dry heat sterilization, capable of killing all microorganisms, including spores.
Modern equipment mostly uses microcomputer control, which can precisely adjust temperature, pressure, and time, and automatically record sterilization logs.
Common Types and Applicable Scenarios
Based on size and exhaust method, medical autoclaves are mainly divided into the following categories:
Classified by Style:
Portable: Smaller capacity (18L-30L), easy to carry, suitable for small laboratories or clinics.
Upright: Capacity 30L-200L, small footprint, easy to operate, a common choice for hospital sterilization supply centers.
Horizontal: Larger capacity, suitable for sterilizing large quantities of items, such as pharmaceutical factories or large hospitals. Encyclopedia
Classification by Exhaust Method:
Downdraft Exhaust (Gravity Displacement): Utilizes the principle that steam is lighter than air to expel cold air. Suitable for solid items, but not for liquids.
Pre-vacuum (Pulsating Vacuum): A vacuum is first created before steam is introduced. Air is thoroughly removed, resulting in a shorter sterilization cycle. Suitable for porous items and instrument packs.
