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J Neurosurg. 1976 Oct;45(4):432-6.

Restricted fluid intake. Rational management of the neurosurgical patient.


Water balance studies in postcraniotomy patients indicate that restriction of fluid intake to 1 liter daily maintains the patient in homeostatic balance. A larger fluid intake will expand the extracellular space and presumably unfavorably influence cerebral edema. Daily observation of serum sodium and osmolarity and blood urea nitrogen, and preserving their normalcy, is a rational way of regulating fluid intake of the brain-injured patient. Fluid restriction should be used with caution if hyperosmolar agents, diuretics, or dexamethasone are also administered.

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