I'm 8 weeks out from my CRCST exam and feel pretty good about decontamination and assembly, but sterilization parameters are giving me a lot of trouble. Specifically the time/temperature/pressure relationships for steam cycles - I can memorize individual numbers but then get confused when questions mix gravity displacement and prevacuum cycles.
I've been studying about 90 minutes a day after my shift and went through the IAHCSMM textbook twice. The chapter on biological and chemical indicators feels solid, but the actual cycle parameters - like gravity displacement at 250°F for 30 minutes versus 270°F for 15-18 minutes - I keep second-guessing myself under test pressure.
Is there a chart or memory trick that helps keep steam sterilization parameters straight? I've seen different numbers in different practice materials and I'm not sure which ones the CRCST exam actually uses. Also, how heavily does the exam test EtO and hydrogen peroxide cycles versus steam? I work in an all-steam facility so those feel more theoretical.
Passed my practical competency last month with no issues, so I'm confident in hands-on skills - just need to nail down the knowledge portion. The exam requires a 75% to pass and I want some buffer above that.
I made flashcards with cycle type, temperature, time, and load type on one side and the rationale on the other. Running through them 15 minutes before bed every night for 3 weeks locked it in for me better than re-reading the chapter.
EtO and H2O2 plasma questions show up but they're maybe 10-12% of what I saw. Don't neglect them but steam is definitely the bulk. Know the aeration times for EtO specifically because those are commonly tested and easy to mix up.
The CRCST exam uses parameters from the current IAHCSMM Central Service Technical Manual, not manufacturer-specific numbers. For gravity displacement just remember 250°F/30 min for wrapped items and 270°F/15 min as the prevacuum shorthand - those come up constantly.
I passed with an 82% last fall. The sterilization section is about 25% of the exam so the extra effort is worth it. Questions tend to be application-based - like what you'd do if a biological indicator fails - rather than pure number recall.