Sensitivity and specificity of strategies to identify patients with hemostasis abnormalities leading to an increased risk of bleeding before scheduled intervention: the Hemorisk study.
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Ajzenberg Nadine, Longrois Dan, Faille Dorothée, de Tymowski Christian, De Raucourt Emmanuelle, Boudaoud Larbi, Sigaut Stéphanie, Martin-Toutain Isabelle, Raux Mathieu, Helley Dominique, Josserand Julien, Flaujac Claire, Duchemin Jérome, Samama Charles-Marc, Gouin-Thibault Isabelle, Beloeil Hélène, Peynaud-Debayle Edith, Keita-Meyer Hawa, Bourrienne Marie-Charlotte, Quintin Caroline, Paugam-Burtz Catherine, Rosencher Nadia, Valentin Jean-Baptiste, Giboin Caroline, Tubach Florence
Аннотация
OBJECTIVES: To assess the diagnostic accuracy of 3 strategies, performed at the preanesthesia visit before scheduled interventions, and to identify patients with hemostasis abnormalities leading to an increased bleeding risk METHODS: A multicenter study was performed in 7 French academic hospitals, involving patients scheduled for surgical intervention, without antiplatelet/anticoagulant treatment. The 3 strategies consisted of 1-a structured screening questionnaire; 2-PT, APTT, and platelet count ordered in selected patients; and 3-systematic PT, APTT, and platelet count. The reference standard comprised von Willebrand factor activity/antigen, factor (F)VIII, FIX, FXI, platelet function analyzer, and, when required, FII, FV, FX, and FVII and hemostasis consultation.
RESULTS: Eighteen (1.2%) of 1484 patients had a hemostasis abnormality leading to an increased bleeding risk according to reference standard. In the overall cohort, sensitivity of the questionnaire-based strategy was 50% (95% CI, 26%-74%; specificity, 87% [95% CI, 85%-88%]); sensitivity was 0% (95% CI, 0%-41%) in men vs 82% (95% CI, 48%-98%) in women. For selective routine tests, sensitivity was 33% (95% CI, 13%-59%) and specificity 97% (95% CI, 96%-98%). Corresponding values for systematic routine tests were 44% (95% CI, 22%-69%) and 93% (95% CI, 91%-94%).
CONCLUSION: Sensitivity was low for all 3 strategies investigated. The structured screening questionnaire had clinically acceptable diagnostic accuracy only in women.