Table 3

Application of diagnostic criteria for SIADH in eight patients suspected of having this condition

PatientUrine electrolytes and osmolalityTFTSerum cortisol or synacthen testRenal functionDiuretics
SIADH, syndrome of inappropriate secretion of antidiuretic hormone; TFT, thyroid function tests.
1YesNoYesNormalYes
2NoNoNoNormalNo
3NoNoYesAbnormalNo
4NoNoYesNormalYes
5Osmolality onlyYesNoNormalNo
6Osmolality onlyNoYesNormalNo
7YesNoNoNormalNo
8Osmolality onlyNoNoNormalNo