Intermediate Technical IVT

SIADH

Also written as: SIADH — Syndrome of Inappropriate Antidiuretic Hormone Secretion

A condition causing hyponatremia due to excessive ADH release, commonly seen in neurocritical care patients.

Full Definition

Syndrome of Inappropriate Antidiuretic Hormone Secretion is a frequent electrolyte disorder in neurocritical care, characterized by hyponatremia resulting from excessive water retention. It commonly occurs following subarachnoid hemorrhage, traumatic brain injury, or intracranial surgery. The condition requires careful fluid management and sodium monitoring to prevent cerebral edema and neurological deterioration.

Usage

Usage note: Always spell out on first use; distinguish from cerebral salt wasting in clinical contexts

In Context

"The patient developed SIADH following clipping of the anterior communicating artery aneurysm." — Post-operative report
"Fluid restriction was initiated to manage SIADH-induced hyponatremia." — Treatment plan

Also known as

inappropriate ADH syndrome ADH hypersecretion syndrome

Contrasted with

diabetes insipidus central diabetes insipidus

Don't confuse with

cerebral salt wasting diabetes insipidus

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