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Updated: May 20, 2026

The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well
Published on: February 27, 2026
A dyspnea patient with abnormal prolonged prothrombin time and activated partial thromboplstin time, but without
Abstract:
A patient with erythrocytosis secondary to chronic obstructive pulmonary disease (COPD) was admitted to hospital because of dyspnea. The coagulation tests revealed abnormal prolonged prothrombin time (PT) and activated partial thromboplstin time (APTT), however, it could not be explained by the patient's medical history or physical signs of coagulation disorder. High hematocrit (Hct), which leads to reduced plasma-to-anticoagulant rate and increased final plasma anticoagulant concentration, was identified as the reason for false prolongation of PT and APTT.
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