Craniotomy / Post-Neurosurgical Care

After a craniotomy, the nurse's positioning choice can mean the difference between normal recovery and fatal brain herniation. Knowing which side to elevate — and which to avoid — is non-negotiable.

A craniotomy involves removing a section of skull (bone flap) to access brain tissue for tumor removal, hematoma evacuation, or aneurysm repair. Postoperatively, the priority is preventing increased intracranial pressure (ICP). For supratentorial craniotomy, elevate the head of bed 30 degrees to promote venous drainage. Position the patient on the non-operative side or back — never on the operative side unless specifically ordered, because pressure on the surgical flap risks displacement and brain compression. Avoid direct pressure on the surgical site regardless of position. Monitor neurological status every 1–2 hours using the Glasgow Coma Scale: any decline of 2 or more points signals danger. Watch for signs of increased ICP: decreasing LOC, unilateral pupil dilation, widening pulse pressure, bradycardia, and irregular respirations (Cushing's triad is a late, ominous sign). Expect periorbital and facial edema postoperatively — this is normal and resolves. Monitor the surgical dressing for CSF leakage — clear or straw-colored drainage that tests positive for glucose on a glucose reagent test strip (halo test on linen shows concentric ring). Avoid hypotonic IV solutions (e.g., D5W) as they worsen cerebral edema; use isotonic solutions (NS or LR). Strict I&O tracking, seizure precautions, and avoiding Valsalva maneuvers (straining, coughing, nose-blowing) protect against ICP spikes. Corticosteroids like dexamethasone reduce cerebral edema; anticonvulsants are typically given prophylactically.

Key Distinctions

Don't confuse positioning after supratentorial craniotomy (non-operative side, HOB 30°) with positioning after infratentorial (posterior fossa) surgery, where the patient lies flat or with only slight elevation to avoid pressure on the brainstem. In a craniotomy the bone flap is replaced; in a craniectomy it is left off (e.g., for severe edema), and positioning rules may differ — follow specific orders. Students mix up CSF leak (clear, glucose-positive, halo sign) with normal serosanguineous drainage (pink-tinged, no halo). Cushing's triad (hypertension, bradycardia, irregular respirations) is a late sign of herniation — waiting for all three before acting is too late.

Clinical Pearl

Think 'flap up, pressure down': keep the operative side UP and the HOB at 30° — gravity is your ICP management partner.