Single-unit vs multiple-unit transfusion in hemodynamically stable postpartum anemia: a pragmatic randomized...

Area of Science:

• Obstetrics and Gynecology
• Transfusion Medicine
• Anemia Management

Background:

• The American Academy of Blood Banks advocates for single-unit red cell transfusions to minimize risks and conserve resources.
• Limited data exist on the efficacy of single-unit transfusion protocols specifically within obstetrics.

Purpose of the Study:

• To compare the effectiveness of single-unit versus multiple-unit transfusion protocols for treating hemodynamically stable postpartum anemia.
• To evaluate the impact of different transfusion strategies on patient outcomes and resource utilization.

Main Methods:

• A randomized trial involving 66 women with postpartum anemia compared initial transfusion of 1 unit (single-unit protocol) versus 2 units (multiple-unit protocol) of packed red blood cells.
• Outcomes included total units transfused, length of stay, postpartum complications, and maternal well-being scores at 4-9 weeks.
• Exclusion criteria included unstable vital signs, low hemoglobin levels, hemoglobinopathy, and cardiomyopathy.

Main Results:

• The single-unit protocol transfused significantly fewer units on average (1.2 U vs. 2.1 U; P<.001).
• Over 80% of women in the single-unit arm avoided a second transfusion.
• No significant differences were observed in vital signs, symptoms, length of stay, 30-day complications, or postpartum outcomes between the groups.

Conclusions:

• A single-unit transfusion protocol is effective for hemodynamically stable postpartum anemia, successfully avoiding a second unit in most cases.
• This approach reduces red blood cell utilization without adversely affecting maternal morbidity.
• The findings support the adoption of single-unit initial transfusions in obstetric populations.