A method of testing platelet aggregation in native whole blood

Area of Science:

• Hematology
• Biomedical Engineering
• Analytical Chemistry

Background:

• Platelet aggregation is crucial for hemostasis and thrombosis.
• Accurate measurement of platelet function is vital for diagnosing bleeding disorders and monitoring antithrombotic therapies.
• Existing methods often require anticoagulants or plasma, altering the natural platelet environment.

Purpose of the Study:

• To report a novel method for assessing collagen-induced platelet aggregation and adenosine triphosphate (ATP) release.
• To measure these parameters in native, non-anticoagulated whole blood.
• To establish a simpler and potentially more sensitive assay for platelet function.

Main Methods:

• Utilizing the Chrono Log Whole Blood Aggregometer to monitor electrical impedance.
• Testing collagen-induced platelet aggregation in native whole blood.
• Measuring simultaneous ATP release via the luminescence channel.

Main Results:

• The developed method allows for the measurement of platelet aggregation and ATP release in native whole blood.
• This technique is the first simple method to measure human platelet aggregation in its natural environment.
• Lower collagen concentrations were found to induce platelet aggregation compared to traditional methods (impedance with citrated blood, optical in platelet-rich plasma).
• The aggregation response was unaffected by therapeutic doses of hirudin or heparin.

Conclusions:

• The electrical impedance method in native whole blood offers a sensitive and straightforward approach to evaluate platelet function.
• This method provides a more physiologically relevant assessment of platelet aggregation and ATP release.
• The technique is robust and not inhibited by common anticoagulants at therapeutic levels.