What is the purpose of using a saline control in a crossmatch test?

A To detect IgM antibodies
B To detect IgG antibodies
C To verify the integrity of the test system ✓
D To identify the blood group of the donor unit

Explanation

The saline control is used to verify that the test system is functioning correctly and that any reactions observed are due to the presence of antibodies, rather than other factors.

Source

Standard Operating Procedures for Crossmatch Testing
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Medium MEDICAL Confidence: high