An Immediate Spin Crossmatch Was Performed Using Recipient Serum and Donor

question 7

Multiple Choice

An immediate spin crossmatch was performed using recipient serum and donor cells from a group AB unit. At immediate spin, the reaction was 4+. What is the reason for this positive reaction?

• A) ABO incompatibility
• B) An alloantibody
• C) Positive DAT on donor cells
• D) Positive DAT on recipient cells

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Definitions:

Machine-Hours

Machine-hours refer to the total time that machinery is in operation, often used as a basis for allocating manufacturing overhead costs.

Unused Capacity

The portion of a company's production capability or resources that is not currently being utilized to generate revenue or output.

Predetermined Overhead Rate

A rate calculated before a production period based on estimated overhead costs and activity levels, used to allocate overhead costs to products.

Capacity

The highest amount of production a business can maintain over a specific time frame under standard conditions.