Certified Medical Assistant (CMA AAMA)Procedures, Examinations and DiagnosticsMedium
A medical assistant collects a venous blood specimen from a patient. At what point should the specimen tube be labeled with the patient's identifying information?
- AAfter transporting the specimen to the reference laboratory
- BAfter centrifuging the specimen in the lab
- CImmediately after collection, while still at the patient's side
- DBefore drawing the blood, using a pre-printed label on the tray
Show answer & explanationAnswer & explanation
Correct answer: C. Immediately after collection, while still at the patient's side
Specimen tubes must be labeled immediately after collection while the medical assistant is still with the patient, verifying patient identity before leaving the bedside to prevent mislabeling errors.
Why the other options are wrong
- A. Labeling after transport creates high risk for specimen misidentification.
- B. Labeling after centrifugation is far too late and violates chain-of-custody standards.
- D. Pre-labeling before draw risks labeling the wrong tube if collection fails or multiple patients are drawn.
Specimen Labeling Timing
Blood and body fluid specimens must be labeled immediately after collection, before leaving the patient, to ensure correct identification and prevent errors.
- Label tubes at bedside immediately post-collection
- Include patient name, DOB/ID, date, time, and collector initials
- Never label tubes before collection is confirmed successful
Memory trick: 'Label before you leave the patient's side.'