If a doctor orders a test stat, when should that test be initiated or completed?

The laboratory recognizes that certain test values may be of immediate importance in the maintenance of quality patient care. These test values are referred to as critical values. In accordance with established laboratory policy and National Patient Safety Goals, all critical values will be phoned directly to the nursing station, physician, physician office, or nursing home in charge of the patient. Click here to view these critical values.

i think your answer is c. measurement system in which the medication dosage was calculated.