A Phlebotomist Is Performing Point-Of-Care (POC) Glucose Measurements on Patients

Multiple Choice

A phlebotomist is performing point-of-care (POC) glucose measurements on patients in the outpatient clinic using a glucose meter according to established procedures. He or she notices that one patient's glucose value is very high at 327 mg/dL. Lab policy requires that POC glucoses greater than 200 mg/DL be verified by a glucose performed in the central laboratory on an instrument. However, the phlebotomist forgets this requirement in his or her haste to phone the result to the patient's physician as soon as possible. This action has introduced which type of variable into the test system?

A) Examination
B) Postexamination
C) Preexamination
D) Examination and postexamination