Dehydrated patient without clinically evident cause: A case report

Table 2 Bartter’s syndrome and cystic fibrosis: Differential diagnosis (modified from references[9-18])

	Cystic fibrosis	Bartter’s syndrome
ABE	Alkalosis	Alkalosis
FeNa+u	< 1%	> 1%
Na+pl	↓	↓
Cl-pl	↓	↓
Cl-u	↓	↑

ABE: Acid-Basic Equilibria; FeNa⁺_u: Urinary Fractional excretion of sodium; Na⁺_pl: Plasmatic Sodium; Cl^-_pl: Plasmatic Chloride; Cl^-_u: Urinary Chloride.