Platelet-function testing in patients undergoing neurovascular procedures: caught between a rock and a hard place

Area of Science:

• Neurointerventional Surgery
• Pharmacology
• Clinical Pathology

Background:

• Clopidogrel is an antiplatelet medication frequently used in neurointerventional procedures.
• Clopidogrel hyper-responsiveness is linked to increased hemorrhage risk.
• Clopidogrel resistance is associated with thromboembolic events.

Purpose of the Study:

• To evaluate the current evidence regarding routine platelet function testing for clopidogrel in neurointerventional procedures.
• To determine if routine testing is clinically justified and ready for widespread adoption.

Main Methods:

• Literature review of studies investigating clopidogrel response and outcomes in neurointerventional settings.
• Analysis of the association between platelet function test results and adverse events like hemorrhage and thromboembolism.

Main Results:

• The literature suggests a correlation between clopidogrel non-responsiveness (resistance) and thromboembolism.
• Conversely, clopidogrel hyper-responsiveness has been linked to an increased risk of hemorrhage.
• Despite these associations, the data is insufficient to recommend routine platelet testing.

Conclusions:

• Routine platelet function testing for clopidogrel in neurointerventional procedures is not currently supported by robust evidence.
• Further research is needed to establish the clinical utility and cost-effectiveness of such testing before widespread implementation.