Exam 10: Pre-Transfusion Testing

A 39-year-old male is hemorrhaging severely. He is AB Rh-negative. Eight units of blood are required STAT. Of the following types available in the blood bank, which is most preferable for crossmatch?

Blood transfused to infants (less than 4 months old) must be less than_____ days old.

What is the optimal time interval for compatibility testing if the patient has been transfused in the past 3 months?

A type and screen is done on a 49-year-old woman who is scheduled for a hysterectomy in 1 week. Her blood type is A-positive, and her antibody screen was positive. What must be done before her surgery date?

A male patient of average size has a hemoglobin count of 8.1 g/dl. The surgeon wants a hemoglobin count of 10 g/dl before doing surgery. How many units of RBCs need to be given before the surgeon will accept the patient into surgery?

Mixing patient serum and donor red blood cells together and observing for direct cell lysis or agglutination is known as:

In an intrauterine transfusion, whose serum is used for compatibility testing?

Given the following results, what is the probable cause of a positive reaction in the major crossmatch? IS = 0 37?0°C = 0 AHG = 2+ CC = ND Auto-control was negative

How can the ABO and Rh of the fetus be determined in utero?

What testing should be performed after blood has been issued on emergency release?

If donor cells were coated with antibody resulting in a positive DAT, what phase of the major crossmatch would generally react?

The transfusion nurse calls the blood bank 5 minutes after a unit of packed cells were issued to say that the unit is not needed at this time. It is important for the nurse to bring the unit back immediately so that the temperature of the unit does not exceed:

What criterion governs the use of the electronic crossmatch?

Which phlebotomy site is unacceptable for compatibility testing?

In what phase of reactivity is rouleaux usually found?

What is an abbreviated crossmatch?

A patient with anti-K and anti-Jk^a needs two units of RBCs for surgery. How many group-specific units would need to be screened to find two that are compatible?

The ABO dipstick test is based on what principle?

What anticoagulant is used to eliminate false-negative reactivity caused by cold autoantibodies and rouleaux?

What is the primary objective of the major crossmatch?