Idiopathic normal pressure hydrocephalus (iNPH) is a syndrome characterized by gait instability, dementia, and urinary incontinence, most often in the elderly, and accompanied by ventricular enlargement. Patients’ symptoms can be improved by shunt surgery, but preoperative diagnosis is not easy and post-shunt complications are not uncommon. Treatment: ventriculoperitoneal drainage is the most commonly used. Shunt selection: the final choice is a pressure-adjustable tube that is gradually adjusted to the appropriate pressure postoperatively. Common complications of the procedure: shunt infection, shunt failure, headache, subdural effusion and subdural hematoma due to excessive shunt.