Optional medical device diagnostics–depending on the results of history, physical examination, laboratory diagnostics, and obligatory medical device diagnostics–for differential diagnostic workup
- Abdominal ultrasonography (ultrasound examination of abdominal organs) – for diagnosis of renal disease or diarrhea (diarrhea).
- Electrocardiogram (ECG; recording of the electrical activity of the heart muscle) – to exclude cardiac arrhythmias in electrolyte disorders.