[Evaluation of methods of studying hemostasis]

Area of Science:

• Hematology
• Clinical Chemistry
• Diagnostic Reagents

Background:

• Platelet aggregation is a critical indicator of hemostasis and thrombotic risk.
• Standardized and sensitive reagents are essential for accurate diagnostic testing.
• Comparative studies are needed to evaluate the performance of reagents from different manufacturers.

Purpose of the Study:

• To comparatively assess platelet aggregation study methods used in the USSR and Hungary.
• To evaluate the sensitivity, reproducibility, and practicality of Reanal (Hungary) reagents versus Soviet-made reagents.
• To assess the performance of reagents in activated partial thromboplastin time (aPTT) testing.

Main Methods:

• Comparative analysis of platelet aggregation assays.
• Visual assessment of aggregate formation (snow whirl method).
• Evaluation of activated partial thromboplastin time (aPTT) using different thromboplastin reagents.

Main Results:

• Both Soviet and Hungarian methods for platelet aggregation are useful and reproducible.
• Reanal (Hungary) reagents exhibit higher sensitivity, yielding more distinct and rapid aggregate formation.
• Hungarian reagents offer a complete, standardized kit, advantageous for visual assessment and general use.
• aPTT testing showed high variability with Soviet reagents, potentially due to nonstandard reference plasma.
• Imported lyophilized reagents offer a one-year shelf life and transport stability.

Conclusions:

• Hungarian reagents provide enhanced sensitivity and standardization for platelet aggregation studies.
• Reanal reagents are particularly beneficial when aggregometers are unavailable, aiding visual assessment.
• Standardization of reagents and reference plasma is crucial for reliable aPTT testing.
• Imported reagents offer practical advantages in terms of shelf life and transportation.