An acid elution stain was made using a 1-hour postdelivery maternal blood sample. Results: 10 fetal cells/1000 cells counted
It is the policy to add 1 vial of Rh immune globulin to the calculated dose when the estimated volume of the hemorrhage exceeds 20 mL of whole blood. Calculate the number of vials of Rh immune globulin that would be indicated under these circumstances.

Question

Quizplus · Accepted Answer

10/1000 = 1% bleed
1 F1F1F1S1F1F1F10 50 = 50 (50 mL of fetal blood in the mother's circulation)
50/30 = 1.66 (30 mL bleed is protected by 1 vial of Rh immune globulin)
1.66 F1F1F1S1F1F1F10 2 (round up)
2 + 1 = 3 doses (one added for safety margin)

An Acid Elution Stain Was Made Using a 1-Hour Postdelivery