Investigations recommended in cases of central and branch retinal arterial occlusions
| ANA: antinuclear antibody; PT: prothrombin time; APTT: activated partial thromboplastin time. |
| In all cases |
| Blood pressure |
| Electrocardiogram |
| Urine analysis |
| Fasting blood glucose |
| Fasting serum cholesterol and triglycerides |
| Erythrocyte sedimentation rate |
| Full blood count |
| Doppler studies of the carotid vessels |
| Transthoracic echocardiography in young subjects, or in patients with cardioembolic risk factors |
| In subjects aged less than 40 years |
| Vasculitis screen (ANA, anti-double stranded DNA antibody, lupus anticoagulant, anticardiolipin antibody, C reactive protein) |
| Routine coagulation screening test (PT, APTT) |
| Specialised platelet activity and clotting factor studies (levels of antithrombin III, protein C, protein S, plasminogen activator, plasminogen activator inhibitor, fibrinogen, as well as resistance to activated protein C) |
| Oral methionine loading test |
| HIV test in selected cases |