IG-16 QC Out? Stop. Fix. Prove It.

1 · Start of shift

Yes — in control: QC is verified within acceptable limits. Proceed with testing; patient results are authorized and released.

Key distinction: a warning rule alone does not stop the run — a rejection rule does. When a rejection rule is violated, follow column 3.

Stop patient testing immediately. Notify the Chief Medical Technologist / Pathologist of the stoppage.
Inspect the error type; investigate probable root causes.
Execute corrective measures; analyze fresh control aliquots.
Back in control? Testing resumes. Still out? Evaluate, recall, or retest patient specimens tested since the last acceptable QC run.
Document all troubleshooting on the control troubleshooting log. The CMT periodically reviews control records.