Bleeding Disorder Diagnosis and Management

Clinical Presentation and Testing

The American Society of Hematology suggests that patients with mucocutaneous bleeding, delayed post-surgical bleeding, and strong family history require comprehensive platelet function testing and evaluation for rare bleeding disorders 1, 2
Normal coagulation studies (INR, PTT) and von Willebrand parameters do not rule out all bleeding disorders, as some disorders may have variable expression 1, 3
The International Society on Thrombosis and Haemostasis recommends platelet function testing using light transmission aggregometry with multiple agonists (ADP, collagen, epinephrine, ristocetin, arachidonic acid) for patients with suspected bleeding disorders 2, 4
Platelet flow cytometry to evaluate platelet surface glycoproteins and activation markers is also recommended 2, 4

The American College of Pathology recommends complete blood count with peripheral blood smear to evaluate platelet morphology 5
Fibrinogen level (Clauss method) should be assessed to evaluate for fibrinogen disorders 5
Factor XIII activity should be tested, as it is often overlooked in routine coagulation panels 4, 6
Rare coagulation factor assays (FII, FV, FVII, FX) should be considered, especially if there's a family history pattern 4

VWF multimer analysis should be performed to detect subtle abnormalities in VWF structure that may not be apparent in routine VWF testing 1, 7
Genetic testing for rare bleeding disorders should be considered if other testing is inconclusive 2, 4
The European Hematology Association suggests that patients with Bleeding Disorder of Unknown Cause (BDUC) may require prophylactic treatment with tranexamic acid and possibly desmopressin for future surgical procedures 4