Hyponatremia differential diagnosis
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Hyponatremia Microchapters |
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Diagnosis |
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Hyponatremia differential diagnosis On the Web |
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American Roentgen Ray Society Images of Hyponatremia differential diagnosis |
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Risk calculators and risk factors for Hyponatremia differential diagnosis |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Saeedeh Kowsarnia M.D.[2] Iqra Qamar M.D.[3]
Overview
Hyponatremia must be differentiated from other diseases that cause
Differentiating Hyponatremia from other Diseases
| Classification by volume status | Disease | Clinical manifestations | Paraclinical Findings | Comments | ||||||||||||||||||
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| Hypervolemic | Symptoms and Signs | Lab Findings | Imaging | |||||||||||||||||||
| Muscle weakness/ Cramps | Thirst | Vomiting/ Diarrhea | Confusion/ Dizziness | Seizures | JVP | Edema | Crackles | Ascites | Tachycardia | Hypotension | Oliguria | CBC | Urine Analysis | Serum Osmolality | ADH levels | Other | ||||||
| Urine Na | Urine Osm | FeNa | ||||||||||||||||||||
| Renal failure | >20 | - | >1% | |||||||||||||||||||
| Congestive heart failure | <10 | - | <1% | |||||||||||||||||||
| Cirrhosis | <10 | - | <1% | |||||||||||||||||||
| Euvolemic | SIADH | - | >100 | - | ||||||||||||||||||
| Hypothyroidism | - | >100 | - | |||||||||||||||||||
| Adrenal insufficiency | - | >100 | - | |||||||||||||||||||
| Psychogenic polydipsia | - | <100 | - | |||||||||||||||||||
| Pregnancy | - | Variable | - | |||||||||||||||||||
| Anorexia (Chronic malnutrition) | - | Variable | - | |||||||||||||||||||
| Hypovolemic | Diuretic induced hyponatremia | >20 | - | >1% | ||||||||||||||||||
| Non oliguric ATN | >20 | - | >1% | |||||||||||||||||||
| Diseases causing 3rd spacing (Pancreatitis, SBO) | <10 | - | <1% | |||||||||||||||||||
| Gastroenteritis | <10 | - | <1% | |||||||||||||||||||
| Sweating | <10 | - | <1% | |||||||||||||||||||