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Calculated platelet dose: Is it useful in clinical practice?
Sabeen Askari1, Phillip R Weik, John Crosson
1Division of Transfusion Medicine, Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis 55455, USA. askar001@umn.edu
Journal of Clinical Apheresis
|September 5, 2002
Summary
The corrected count increment (CCI) formula for calculating platelet dose (PD) did not reduce platelet usage in non-bleeding patients when the routine dose was six or fewer units. This standardized assessment method did not significantly alter post-transfusion platelet increments compared to clinical judgment alone.
Area of Science:
- Transfusion Medicine
- Hematology
- Clinical Pathology
Background:
- Platelet transfusions are crucial for managing thrombocytopenia.
- Standardizing platelet dose (PD) calculation is essential for efficient transfusion practices.
- The corrected count increment (CCI) formula aims to standardize PD based on body surface area (BSA).
Purpose of the Study:
- To evaluate the clinical utility of the CCI formula in determining platelet dose for non-bleeding patients.
- To compare the effectiveness of CCI-calculated PD versus clinically judged PD on platelet increments.
- To assess the impact of CCI-based PD calculation on overall platelet utilization.
Main Methods:
- Retrospective review of 2,202 platelet transfusions over three years at a level-one trauma center.
- Comparison of 49 transfusions using CCI-calculated PD with 34 transfusions based on clinical judgment.
- Analysis of pre-transfusion parameters, ABO compatibility, and post-transfusion platelet increments at various time points.
Main Results:
- No significant difference in platelet count increments was observed between the CCI-calculated PD group and the clinical judgment group at 1, 1-18, or 18-24 hours post-transfusion.
- The mean calculated PD (6 U ± 1 SD) was comparable to the clinically judged PD.
- Platelet usage was not reduced when employing the CCI formula for routine doses of six or fewer platelet concentrates.
Conclusions:
- The CCI formula, while standardizing PD calculation, did not demonstrate a reduction in platelet usage for non-bleeding patients receiving six or fewer units.
- Clinical judgment remains a viable method for determining platelet dose in this patient population.
- Further studies may be warranted to explore CCI formula efficacy in different clinical scenarios or with higher platelet doses.