SIADH

Question 1

What happens in SIADH

Answer 1

Too much ADH is secreted leading to water retention and concentrated urine causing hyponatremia

Question 2

What kind of tumors are more likely to cause SIADH

Answer 2

Small cell lung cancer

Question 3

What pulmonary diseases are more likely to cause SIADH

Answer 3

COPD
Asthma

Question 4

What infections are likely to cause SIADH

Answer 4

TB
HIV/ AIDS
PNA
Pulmonary abcess

Question 5

What CNS disorders are more likely to cause SIADH

Answer 5

Stroke, Head injury, encephalitis, meningitis

Question 6

What drugs are likely to cause SIADH

Answer 6

Tricyclics, carbamazepine, ACEi, narcotics, nicotine, MAOIs, SSRIs.
Vasopressin

Question 7

S/s of SIADH

Answer 7

Hyponatremia, hypoosmolarity,

Question 8

What is the urine sodium and osmo in SIADH

Answer 8

Sodium: >40
Osmo: >100

Question 9

SIADH treatment plan

Answer 9

Remove underlying cause, fluid restriction (<800mls/day unless SAH then use 3%), salt tabs, loop diuretics, tolvaptan