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Spontaneous platelet aggregation in normal subject assessed by a laser light scattering method: an attempt at
Hiroko Toshima1, Hiroshi Sugihara, Hitoshi Hamano
1Department of Physiology (II), Jikei University School of Medicine, Tokyo, Japan. toshima@jikei.ac.jp
Platelets
|June 24, 2008
Summary
This study establishes standard ranges for spontaneous platelet aggregation (SPA) using laser light scattering. Blood collection methods significantly impact SPA measurements, highlighting the need for standardized procedures to ensure accurate results for thrombotic disease assessment.
Area of Science:
- Hematology
- Clinical Chemistry
- Biomedical Engineering
Background:
- Spontaneous platelet aggregation (SPA) is a sensitive indicator of platelet activation.
- SPA has been linked to various thrombotic diseases.
- Standardized measurement of SPA is crucial for clinical applications.
Purpose of the Study:
- To measure SPA in healthy subjects using laser light scattering (LS).
- To identify factors influencing SPA, including blood collection procedures.
- To establish tentative standard ranges for SPA values.
Main Methods:
- SPA was measured in 167 healthy subjects using the LS method.
- Quantitative measures included maximum total LS intensity (SMAX) and area under the curve (SAUC).
- Statistical analysis utilized log-transformed SMAX and SAUC values due to skewed distributions.
Main Results:
- Blood collection using a tourniquet and/or 21 G needle resulted in significantly higher log SMAX and log SAUC values.
- Vacuum tubes and regular citrate concentrations yielded significantly different log SAUC values compared to syringe collection and higher citrate concentrations.
- Hematocrit and plasma glucose levels influenced log SMAX values.
Conclusions:
- Standardization of SPA measurements requires completion within two hours of blood collection and use of regular citrate concentrations.
- Tentative standard ranges for SMAX and SAUC were proposed based on different collection methods.
- Consistent SPA measurement protocols are essential for reliable clinical interpretation.
