Q14
Single choice
The negative antigen frequencies are used in the formula below to determine the percent of type-specific units that would be compatible for the patient. Negative antigen frequencies are determined by subtracting the percent antigen frequency from 100%. The negative antigen frequency for K in this case is .91 (1.00 -
.09) and the negative antigen frequency for Fya is .34 (1.00 - .66).
% compatible units available = 100 x (Neg frequency #1 x Neg frequency #2...)
For this case, the calculation is:
% compatible units available = 100 x (0.91 x 0.34) = 30.94 or 31% If the antigen frequencies for K = 0.09 and Fya = 0.66, what percent of type-specific units would be compatible for a patient with anti-K and anti-Fya?