Blog

The medical laboratory scientist has recently been promoted to a supervisory position in the transfusion service of a small rural hospital. He feels that the optimal blood in inventory should be reviewed. The data for the previous 3 months of group A, Rh-positive blood usage are given below. Week Usage   Week Usage 1 2   7 11 2 2   8 3 3 1   9 2 4 3   10 1 5 1   11 2 6 3   12 2 Assuming that these data are representative of a 6-month period, what should the optimal inventory of A-positive units be for this institution if calculated by average weekly use?

In which of the following situations would the administration of Rh-immune globulin (RhIg) NOT be indicated? None of the women has received antenatal RhIg.

In the direct (DAT) and indirect (IAT) antiglobulin techniqes, false negative reactions may result if the:

Blood selected for an exchange transfusion must:

The test for weak D is perfomed by incubating patient’s red cells with:

A technologist obtained the following results on a patient sample: The technologist washed the patient’s cells with saline, and repeated the forward typing. A saline replacement tecnique was used with the reverse typing. The following results were obtained: Anti-A Anti-B Anti-A,B A1 Cells B Cells Original Results 4+ 3+ 4+ 2+ 4+ Results after washing patient’s cells and saline replacement 4+ 0 4+ 0 4+ The results are consistent with:

A crossmatch and screen cells are 2+ at immediate spin, 1+ at 37 degrees C and negative with AHG. Identify the most likely problem.

An unexplained fall in hemoglobin and mild jaundice in a patient transfused with red blood cells 1 week ago would most likely indicate:

Even in the absence of prior transfusion or pregnancy, individuals with the Bombay phenotype will always have naturally occurring:

The prevention of the issue of an incompatible blood component is an example of