Monitoring & QAQuestion 62 of 100
Which class of chemical indicator reacts to all critical variables of the sterilization cycle and has performance correlated to a biological indicator?
a.Class 1, process indicator
b.Class 3, single-variable indicator
c.Class 4, multi-variable indicator
d.Class 5, integrating indicator
Explanation
Class 5 integrating indicators respond to all critical variables of the cycle and are calibrated against the stated values of the reference biological indicator, which is why they are commonly placed in process challenge devices and in implant loads alongside a biological indicator. Class 3 responds to one variable and Class 4 responds to two or more but not all. Class 1 only shows external exposure.
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- Which organism is used in biological indicators for steam sterilization, and why?
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- A Class 1 chemical indicator is applied to the outside of every wrapped tray. What does it tell the user?
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