Hunt and Hess Grade III Classification and Management

Definition and Classification

The American Association of Neurological Surgeons defines Hunt and Hess Grade III as "lethargy, confusion, mild focal deficit" 1
Patients with altered mental status, such as drowsiness and confusion, indicate lethargy and altered consciousness, consistent with Hunt and Hess Grade III 1
Focal neurological deficit, such as oculomotor nerve palsy, represents a mild focal deficit, consistent with Hunt and Hess Grade III 1
Severe headache is consistent with subarachnoid hemorrhage presentation, a key feature of Hunt and Hess Grade III 2

The American Heart Association recommends urgent aneurysm securing, such as early surgical clipping or endovascular coiling, to reduce rebleeding risk in Hunt and Hess Grade III patients 3
Intensive monitoring, including serial neurological assessments, is mandatory in Hunt and Hess Grade III patients, as clinical deterioration may occur from rebleeding, hydrocephalus, or vasospasm 4
The American College of Cardiology recommends maintaining systolic blood pressure <160 mmHg with titratable agents to prevent rebleeding while maintaining cerebral perfusion in Hunt and Hess Grade III patients 3