An extensive array of haematological investigations was performed, but with a lack of consistency. Three patients were identified to have an inherited bleeding disorder, including haemophilia A, haemophilia B and von Willebrand disease, two of whom were confirmed NAI regardless. All three had abnormal APTT on the initial coagulation screen. We propose initial haematological screening with FBC, PT/APTT/fibrinogen only, unless bleeding risk factors are identified. If an abnormality is detected, subsequent factor levels and further haematological investigations are recommended.
Seeley et al. (2026) studied this question.