Comparative study of hemostatic profile between conventional methods and “Sonoclot Coagulation and Platelet Function Analyzer” in patients with septicemia

Abstract: BACKGROUND: Sonoclot Coagulation and Platelet Functional Analyzer (Sonoclot) operating on the principle of micro-viscometry is known to provide comprehensive information on the entire hemostatic process. We hypothesized that performing global hemostasis assessment in patients with sepsis would identify many more patients with altered hemostasis than the conventional tests. OBJECTIVES: We compared the hemostatic status determined by Sonoclot and that by conventional hemostatic tests. METHODS: It was a prospective analytical study conducted for 18 months in a tertiary care hospital. Sixty-one cases of septicemia admitted in the intensive care units were included in the study. RESULTS: Conventional hemostatic tests (platelet count, prothrombin time [PT], international normalized ratio, and activated partial thromboplastin time [APTT]) were compared with the Sonoclot parameters. Conventional hemostatic parameter PT was prolonged in 60.7% and APTT in 31.1%. Overall, 65.6% of the patients had prolonged coagulation on assessment by conventional hemostatic parameters. Sonoclot-derived parameter-activated clotting time was prolonged in 31.1%, indicating 31.1% of cases to have a hypocoagulable state. The clot rate was increased in 93.4% of subjects, indicating 93.4% to have a hypercoagulable state. Thrombocytopenia was seen in 34.4% and thrombocytosis in 10%. Defective platelet function was observed in 92% of the cases in Sonoclot, and all of them had normal platelet counts. This finding was statistically significant. CONCLUSION: Information about hemostatic status identified by Sonoclot is significantly higher and more complete than that identified by conventional coagulation tests in septicemic patients.