60 mEq/L) in sweat is diagnostic. Can present with contraction alkalosis and hypokalemia (ECF effects analogous to a patient taking a loop diuretic) because of ECF H20/Na+ losses and concomitant renal K+/H+ wasting.COMPIICaTIONSRecurrent pulmonary infections (e.g., Pseudomonas), chronic bronchitis and bronchiectasis - reticulonodular pattern on CXR, pancreatic insufficiency, malabsorption and steatorrhea, nasal polyps, and meconium ileus in newborns. Infertility in males (absence of vas deferens, absent sperm). Fat-soluble vitamin deficiencies (A, D, E, K).TREaTMENTN-acetylcysteine to loosen mucus plugs (cleaves disulfide bonds within mucus glycoproteins), dornase alfa (DNAse) to clear leukocytic debris.">