Subconjunctival Hemorrhage Laboratory Testing

 Laboratory testing may be directed toward identifying blood dyscrasias, clotting disorders and other hematological abnormalities. Suggested testing may include (but is not limited to) the following: 

• Complete blood count with platelets (CBC with differential and platelets)

• CMB - comprehensive metabolic panel

• Prothrombin time (PT)

• Activated partial thromboplastin time (PTT)

• Activated partial thromboplastin time (APTT) 

• An international ratio (INR) to rule out over-anticoagulation in patients taking blood thinners

• Antiphospholipid antibodies

• Homocysteine level, particularly in young men

• Assay for natural anticoagulants such as protein S and protein C, antithrombin III, factor V Leiden

• Beta-glycoprotein

• HIV Virus titers

• Anticoagulation panel for lupus if suspected autoimmune condition

• Sjogren’s testing panel

• If African American, sickle cell panel

• Patients taking warfarin (Coumadin, Bristol-Myers Squibb) or dabigatran (Pradaxa, Boehringer Ingelheim Pharmaceuticals) or aspirin should obtain international normalized ratio (INR) values to determine if therapy needs to be adjusted