Which chemical indicator class is an integrator

CRCST practice question · Sterilization Process

Which chemical indicator class reacts to all critical variables of a sterilization process and is designed to correlate with the performance of a biological indicator?

  • A. Class 3, a single-variable indicator
  • B. Class 4, a multi-variable indicator
  • C. Class 5, an integrating indicator
  • D. Class 1, a process indicator

Answer

C. Class 5, an integrating indicator

Class 5 integrating indicators respond to all critical variables and are tested to perform comparably to a BI. Class 4 indicators react to two or more variables but are not designed to match BI performance.

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