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Related Experiment Videos

Evaluation of the Haemonetics V50--time saver protocol.

F Soudavar1, H Borberg

  • 1Hmapherese Einheit, Klinik I für Innere Medizin, Universität zu Köln.

Infusionstherapie Und Transfusionsmedizin
|October 1, 1992
PubMed
Summary

Optimizing platelet apheresis with the Haemonetics V 50 involves balancing flow rate and centrifuge speed. Higher flow rates reduce platelet yield and leukocyte contamination, while PWC factor affects efficiency and purity.

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Area of Science:

  • Transfusion Medicine
  • Hematology
  • Biomedical Engineering

Background:

  • Platelet apheresis is crucial for managing thrombocytopenia.
  • The Haemonetics V 50 is a widely used apheresis device.
  • Optimizing apheresis parameters is essential for maximizing platelet yield and purity.

Purpose of the Study:

  • To evaluate the impact of varying operational parameters on platelet apheresis using the Haemonetics V 50.
  • To determine optimal settings for balancing platelet yield and leukocyte contamination.

Main Methods:

  • 196 platelet apheresis procedures were performed using the Haemonetics V 50.
  • Parameters varied included flow rate (40-70 ml/min), centrifuge speed (4,800 and 4,400 rpm), and PWC factor (0-4).
  • 162 procedures were statistically analyzed for yield, extraction efficiency (EE), and leukocyte counts.

Main Results:

  • Mean platelet yield was (4.3 +/- 1.05) x 10(11) with an average EE of 53.9 +/- 8.2%.
  • Higher flow rates decreased EE (p < 0.002) and leukocyte counts (p < 0.0005).
  • Increased PWC factor raised EE but also leukocyte counts (p < 0.0005); lower centrifuge speed reduced both EE and leukocyte counts.

Conclusions:

  • Flow rate and centrifuge speed significantly impact platelet apheresis outcomes.
  • Optimizing these parameters is key to enhancing platelet concentrate quality and reducing leukocyte contamination.
  • Further research may refine protocols for improved apheresis efficiency and safety.

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