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Related Experiment Videos

Standardized units of RBCs: is it time for implementation?

C F Högman1, F Knutson

  • 1Department of Clinical Immunology and Transfusion Medicine, University Hospital, Uppsala, Sweden. claes.hogman@klinimm.uu.se

Transfusion
|March 30, 2000
PubMed
Summary

Standardizing red blood cell hemoglobin (Hb) content per unit can optimize blood collection. A 45g Hb standard maximizes red blood cell Hb and plasma yield, improving donor utilization and transfusion practices.

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Area of Science:

  • Transfusion Medicine
  • Blood Component Therapy
  • Hematology

Background:

  • Current red blood cell (RBC) preparation for transfusion lacks standardized hemoglobin (Hb) content.
  • Apheresis technology allows variable collection volumes based on donor characteristics.

Purpose of the Study:

  • To evaluate the impact of different RBC Hb standards on the number of units collectable from donors.
  • To determine optimal RBC Hb standards for maximizing both RBC Hb and plasma yield.

Main Methods:

  • Total Hb mass was calculated using Hb concentration and blood volume (BV) derived from donor weight and height.
  • The number of units collectable without exceeding 13% of BV was estimated for RBC Hb standards of 40, 45, and 50g.

Main Results:

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  • Collecting 1 unit was possible for 93% of female donors with 45 or 50g Hb standards.
  • With a 40g Hb standard, 95% of male donors could yield 2 or more units.
  • A 45g Hb standard maximized total RBC Hb and plasma yield in the study population.

Conclusions:

  • Adjusting RBC Hb standards and collection volumes can improve donor population utilization.
  • Two-unit collections may reduce donor exposure.
  • A 45g RBC Hb standard appears optimal for maximizing RBC Hb and plasma yield in Scandinavian donors, suggesting a review of current preparation guidelines.