[Hypotonic shock reaction as quality control marker for platelet concentrates]

Area of Science:

• Hematology
• Transfusion Medicine
• Quality Control

Context:

• Routine quality control over ten years has led to standardized platelet concentrates (PCs).
• Established parameters for routine PC preparations include pH, platelet concentration, and leukocyte count.
• Assessing the functional integrity of platelet concentrates is crucial for transfusion efficacy.

Purpose:

• To compare the efficacy of three methods for evaluating platelet concentrate (PC) function: morphologic score, platelet aggregation tests, and hypotonic shock reaction.
• To identify the most reliable and practical method for assessing the integrity of platelets in PC preparations.
• To validate the hypotonic shock reaction as a gold standard for PC quality assessment.

Summary:

• Standardized platelet concentrates (PCs) exhibit consistent parameters: pH 6.7-7.3, platelet concentration (1.0-1.5) x 10^9/ml, 80 x 10^9 platelets/PC, and 2 x 10^7 leukocytes/PC.
• Comparison of morphologic scoring, platelet aggregation tests, and hypotonic shock reaction revealed the latter as superior for evaluating PC function.
• The hypotonic shock reaction demonstrated high reproducibility, sensitivity, and simplicity in assessing platelet cell integrity.

Impact:

• Establishes the hypotonic shock reaction as a preferred method for routine quality control of platelet concentrates.
• Improves the reliability of platelet concentrate quality assessment, potentially enhancing transfusion outcomes.
• Provides a standardized, sensitive, and reproducible method for ensuring the functional integrity of transfused platelets.