Platelet Inhibition and Bleeding in Patients Undergoing Non-Cardiac Surgery-The BIANCA Observational Study

Area of Science:

• Cardiology
• Pharmacology
• Surgical Management

Background:

• Many patients require non-cardiac surgery post-coronary stenting, complicated by antiplatelet therapy.
• Managing these patients involves balancing bleeding risk and thrombotic events.

Purpose of the Study:

• To investigate the association between platelet reactivity and bleeding risk in patients undergoing non-cardiac surgery while on clopidogrel.
• To determine if platelet function testing can inform surgical timing and improve patient outcomes.

Main Methods:

• Prospective observational study of 197 patients undergoing non-cardiac surgery within 7 days of clopidogrel therapy.
• Platelet reactivity assessed using light transmittance aggregometry (LTA), VASP assay, Multiplate Analyzer, and Innovance PFA-200.
• Primary endpoint: surgery-related Thrombolysis in Myocardial Infarction (TIMI) bleeding.

Main Results:

• Thrombolysis in Myocardial Infarction (TIMI) bleeding occurred in 25% of patients.
• Increased platelet reactivity to adenosine diphosphate (ADP) assessed by LTA correlated with decreased TIMI bleeding (p=0.031).
• Multivariable analysis showed platelet reactivity to ADP (LTA), age, and surgery urgency were associated with bleeding risk.

Conclusions:

• Pre-operative platelet reactivity to ADP in clopidogrel-treated patients is a significant predictor of surgical bleeding.
• Objective assessment of platelet function may optimize non-cardiac surgery timing in this patient population.