2nd order laboratory parameters – depending on the results of the history, physical examination, and obligatory laboratory parameters – for differential diagnostic clarification.
- Small blood count
- Inflammatory parameters – CRP (C-reactive protein) or ESR (erythrocyte sedimentation rate).
- Urine status (rapid test for: pH, leukocytes, nitrite, protein, glucose, ketone, urobilinogen, bilirubin, blood) including urine volume.
- Electrolytes – sodium, potassium
- Fasting glucose (fasting blood sugar)
- Total protein
- Thyroid parameter – TSH (thyroid-stimulating hormone) – to exclude hypothyroidism (underactive thyroid).
- Renal parameters – urea, creatinine, if necessary cystatin C or creatinine clearance.
- NT-proBNP (N-terminal pro brain natriuretic peptide) – if heart failure (cardiac insufficiency) is suspected.
- In the morning at 8.00 cortisol and ACTH, if necessary ACTH load test; adrenal autoantibodies – if Addison’s disease is suspected.