The following diagnostics are required only in persistent singultus (persistent hiccups)!
Laboratory parameters of the 1st order – obligatory laboratory tests.
- Small blood count
- Inflammatory parameters – CRP (C-reactive protein) or ESR (erythrocyte sedimentation rate).
- Amylase (in serum), lipase – if pancreatitis (inflammation of the pancreas) is suspected [acute pancreatitis: ≥ 3-fold of the upper norm].
- Syphilis serology (see below syphilis) – if syphilis is suspected.