When the following specimens arrive simultaneously: a type and screen for knee arthroplasty, a crossmatch for a postpartum patient with severe hemorrhage, a crossmatch for an anemic patient with Hb 60 g/L, and a Direct Antiglobulin Test for suspected hemolytic transfusion reaction, what is the correct priority order?

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Multiple Choice

When the following specimens arrive simultaneously: a type and screen for knee arthroplasty, a crossmatch for a postpartum patient with severe hemorrhage, a crossmatch for an anemic patient with Hb 60 g/L, and a Direct Antiglobulin Test for suspected hemolytic transfusion reaction, what is the correct priority order?

In transfusion testing, urgency is driven by patient risk: situations with ongoing blood loss or potential for rapid deterioration come first, followed by investigations for suspected transfusion reactions, then other transfusion needs, and elective procedures last. A postpartum patient with severe hemorrhage demands immediate availability of compatible red cells, so a crossmatch for that patient is the top priority. Time is critical to control bleeding, so you prepare units promptly. If a transfusion reaction is suspected, the Direct Antiglobulin Test is essential to confirm immune-mediated hemolysis and guide urgent management. It’s prioritized second because identifying and stopping an adverse reaction can be life-saving, but it doesn’t provide transfused blood by itself. An anemic patient with Hb 60 g/L still needs a transfusion, but this is less urgent than active hemorrhage or an active reaction. The crossmatch for this patient comes after the hemorrhage case and the reaction workup. Type and screen for a knee arthroplasty is a planned, elective procedure. It is the least urgent in this set because there is time to perform preoperative testing ahead of the planned operation. So the correct sequence is: crossmatch for the hemorrhaging patient first, then DAT for suspected hemolytic transfusion reaction, then crossmatch for the anemic patient, and finally type and screen for knee arthroplasty.

In transfusion testing, urgency is driven by patient risk: situations with ongoing blood loss or potential for rapid deterioration come first, followed by investigations for suspected transfusion reactions, then other transfusion needs, and elective procedures last.

A postpartum patient with severe hemorrhage demands immediate availability of compatible red cells, so a crossmatch for that patient is the top priority. Time is critical to control bleeding, so you prepare units promptly.

If a transfusion reaction is suspected, the Direct Antiglobulin Test is essential to confirm immune-mediated hemolysis and guide urgent management. It’s prioritized second because identifying and stopping an adverse reaction can be life-saving, but it doesn’t provide transfused blood by itself.

An anemic patient with Hb 60 g/L still needs a transfusion, but this is less urgent than active hemorrhage or an active reaction. The crossmatch for this patient comes after the hemorrhage case and the reaction workup.

Type and screen for a knee arthroplasty is a planned, elective procedure. It is the least urgent in this set because there is time to perform preoperative testing ahead of the planned operation.

So the correct sequence is: crossmatch for the hemorrhaging patient first, then DAT for suspected hemolytic transfusion reaction, then crossmatch for the anemic patient, and finally type and screen for knee arthroplasty.

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