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ICSH Recommendations for Hemostasis Critical Values, Tests, and Reporting

Authors & Contributors

Robert C. Gosselin, Dorothy Adcock, Akbar Dorgalaleh, Emmanuel J. Favaloro, Giuseppe Lippi, João M. Pego, Irene Regan, Virginie Siguret

First Published

22 October 2019





This guidance document was prepared on behalf of the International Council for Standardization in Haematology (ICSH), the aim of which is to provide hemostasis-related guidance documents for clinical laboratories.


The current ICSH document was developed by an ad hoc committee, comprising an international collection of both clinical and laboratory experts.


The purpose of this ICSH document is to provide laboratory guidance for (1) identifying hemostasis (coagulation) tests that have potential patient risk based on analysis, test result, and patient presentations, (2) critical result thresholds, (3) acceptable reporting and documenting mechanisms, and (4) developing laboratory policies.


The basis for these recommendations was derived from published data, expert opinion, and good laboratory practice. The committee realizes that regional and local regulations, institutional stakeholders (e.g., physicians, laboratory personnel, hospital managers), and patient types (e.g., adults, pediatric, surgical) will be additional confounders for a given laboratory in generating a critical test list, critical value thresholds, and policy.


Nevertheless, we expect this guidance document will be helpful as a framework for local practice.

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