prevacuum sterilizer
Pronunciation: PREE-vak-yoom
Steam sterilizer that uses vacuum cycles to remove air before and after sterilization for enhanced steam penetration.
Full Definition
A prevacuum sterilizer is a type of steam sterilizer that uses mechanical vacuum pumps to remove air from the chamber and load before introducing steam. The vacuum cycles ensure rapid and uniform steam penetration, particularly important for porous materials, lumened instruments, and tightly packed loads. These sterilizers typically operate at higher temperatures (132-135°C) for shorter times compared to gravity displacement units. The prevacuum process includes initial vacuum pulses, steam admission, sterilization exposure, and post-sterilization vacuum drying. This technology provides superior steam penetration and shorter cycle times.
Usage
Usage note: Write as one word 'prevacuum' or hyphenated 'pre-vacuum.' Distinguish from post-vacuum drying cycles.
In Context
- "The prevacuum sterilizer effectively processed the wrapped instrument sets in 15 minutes." — Sterilizer performance log
- "Prevacuum sterilizers require daily Bowie-Dick testing to verify air removal capability." — Operating procedure manual