Flashcards in Pituitary Disorders Deck (7):
Posterior pituitary problems mostly relate to what?
What causes hyper function of the anterior pituitary?
Hyperactivity of target gland
What is syndrome of inappropriate ADH (SIADH)?
Hypersecretion of ADH
What is the etiology of SIADH?
An ectopic tumor secreting ADH-like substance
What occurs in SIADH and why? (2)
-Increased ADH leads to increased water retention, sodium follows. Since water is in excess to sodium it's called DILUTED HYPONATREMIA
- increased blood vol suppresses renin secretion & RAAS leading to less aldosterone and impaired sodium resorption
What is the treatment for mild SIADH?
ADH antagonists (aquaretics-block ADH receptors)