A Blood Sample from a 90-Year-Old Man Was Submitted to the Blood

question 20

Multiple Choice

A blood sample from a 90-year-old man was submitted to the blood bank for a type and screen before surgery.The forward type demonstrates as a group A,whereas the reverse type appears to be group AB.The most likely cause of the discrepancy is:

• A)contaminated reagent antisera.
• B)rouleaux formation.
• C)that the patient has autoantibodies.
• D)that patient has low-titer isoagglutinins.

---

Definitions:

Quarrelsome

Inclined to argue or dispute, often demonstrating a tendency toward conflict rather than agreement.

Psychoanalytic Theory

A framework for understanding human psychology that emphasizes unconscious conflicts and past experiences as determinants of behavior.

Defense Mechanisms

Unconscious psychological strategies employed to protect oneself from anxiety and to manage emotional conflict and internal or external stressors.

Anxiety

A mood of unease or nervousness, often due to something happening soon or because the consequence is unknown.