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Postoperative thrombocytopenia is common after cardiac surgery. Identifying risk factors like age and baseline platelet count can help personalize patient management strategies.

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Area of Science:

  • Cardiovascular Surgery
  • Hematology
  • Critical Care Medicine

Background:

  • Postoperative thrombocytopenia is a frequent complication following cardiac surgery.
  • It is associated with increased patient morbidity and mortality.
  • Understanding its incidence and predictors is crucial for improved patient outcomes.

Purpose of the Study:

  • To describe the incidence of postoperative thrombocytopenia after cardiac surgery.
  • To identify independent predictors of postoperative thrombocytopenia.
  • To inform targeted, individualized platelet management strategies.

Main Methods:

  • Retrospective, single-center study of 519 adult patients undergoing cardiac surgery without operative platelet transfusion.
  • Platelet counts assessed daily (preoperative to postoperative day 7) using thresholds of <150 G/L, <100 G/L, and <50 G/L.
  • Multivariate logistic regression identified independent predictors for thrombocytopenia <100 G/L.

Main Results:

  • Incidence of thrombocytopenia was 59% (<150 G/L), 18% (<100 G/L), and 7% (<50 G/L).
  • Surgery type (mitral valve, ascending aorta, sutureless aortic valve) and off-pump coronary surgery influenced platelet counts.
  • Independent predictors included older age, lower baseline platelets, higher creatinine, red blood cell transfusions, and autotransfusion volume.

Conclusions:

  • The study identified key pre- and perioperative risk factors for thrombocytopenia in cardiac surgery.
  • These findings support the development of individualized platelet management strategies.
  • Thrombocytopenia <100 G/L correlated with increased blood loss, transfusions, and ICU stay.