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Adenosine diphosphate-induced single-platelet count aggregation and bleeding in clopidogrel-treated patients

Magnus Dalén1, Jan van der Linden1, Manne Holm1

  • 1Department of Cardiothoracic Surgery and Anesthesiology, Karolinska University Hospital; Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.

Journal of Cardiothoracic and Vascular Anesthesia
|January 23, 2014
PubMed

Insights

Platelet function testing after clopidogrel treatment did not predict blood loss in patients undergoing coronary artery bypass grafting (CABG). However, it was linked to the need for platelet transfusions post-surgery.

Area of Science:

  • Cardiovascular Medicine
  • Hematology
  • Surgical Research

Background:

  • Clopidogrel is a common antiplatelet medication used in patients with acute coronary syndromes.
  • Coronary artery bypass grafting (CABG) is a major surgical procedure often performed in these patients.
  • Assessing platelet function preoperatively is crucial for managing bleeding risks.

Purpose of the Study:

  • To examine the relationship between adenosine diphosphate (ADP)-induced platelet aggregation and postoperative blood loss.
  • To evaluate the utility of single-platelet count testing in predicting transfusion needs after CABG in clopidogrel-treated patients.

Main Methods:

  • Prospective observational study conducted at a single cardiac surgery center.
  • Eighty-eight patients on clopidogrel therapy within 7 days of CABG were included.
  • Preoperative platelet function was measured using single-platelet count ADP-induced platelet aggregation.

Main Results:

  • No significant association was found between ADP-induced platelet aggregation and 12-hour postoperative blood loss.
  • ADP-induced platelet aggregation significantly correlated with the number of platelet concentrates administered within 24 hours post-surgery.
  • No significant association was observed with packed red blood cell transfusion requirements.

Conclusions:

  • Preoperative platelet aggregation testing in clopidogrel-treated patients undergoing CABG does not predict postoperative blood loss or packed red blood cell transfusions.
  • Single-platelet count ADP-induced platelet aggregation is significantly associated with the need for platelet transfusions in the early postoperative period.
Abstract

Keywords:
clopidogrelcoronary artery bypassplatelet function testsplateletspostoperative bleeding

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