CRCST Exam Prep Practice Exercise 1

3 minutes - Answer- Dynamic air removal: exposure time for any wrapped item at 275 degrees. 97%-100% - Answer- What is the correct percentage of relative humidity for steam sterilization? Conditioning, exposure, exhaust, drying - Answer- What are the 4 cycles of steam sterilization? Ethylene oxide - Answer- Which low-temp sterilization method requires monitoring? By a process called alkylation. - Answer- How does ethylene oxide kill microbes? By a process called oxidation. - Answer- How do ozone and hydrogen peroxide kill microbes? Concentration: 450-1200 mg/l Temp: 98-145 degrees F Exposure time: 1-6 hours Humidity: 40-80% Aeration time: 8-12 hours at 122-140 degrees F - Answer- Discuss sterilization parameters for ethylene oxide (concentration, temp, exposure time, humidity, aeration time) Bacillus atrophaeus - Answer- What is the microorganism of choice for ethylene oxide sterilization? Vacuum, injection, diffusion, plasma, vent - Answer- What are the five phases of gas plasma sterilization? Cellulose, muslin wraps - Answer- Which materials are not recommended for use in hydrogen peroxide sterilization method She? Geobacillus stearothermophilus - Answer- What is the microorganism of choice for hydrogen peroxide gas plasma sterilization? Time: 24-75 minutes Temp: less than 131 degrees F Concentration: 59-95% Vacuum level: auto controlled Plasma: auto controlled - Answer- Discuss hydrogen peroxide gas plasma sterilization parameters (time, temp, concentration, vacuum level, plasma)