1st order laboratory parameters – obligatory laboratory tests.
- Small blood count
- Inflammatory parameters – CRP (C-reactive protein) or ESR (erythrocyte sedimentation rate).
- Fasting glucose (fasting blood glucose).
- Thyroid parameters – TSH
- Liver parameters – alanine aminotransferase (ALT, GPT), aspartate aminotransferase (AST, GOT), glutamate dehydrogenase (GLDH) and gamma-glutamyl transferase (gamma-GT, GGT), alkaline phosphatase, bilirubin.
- Renal parameters – urea, creatinine.
- Drug test – to exclude substance-induced psychosis.
Laboratory parameters 2nd order – depending on the results of the history, physical examination, etc. – for differential diagnostic clarification.
- CSF puncture (collection of cerebrospinal fluid by puncture of the spinal canal) for CSF diagnosis – for clinical risk symptoms that may be indicative of a secondary psychotic disorder:
- Early and acute onset of psychotic symptomatology.
- Focal neurologic symptoms (selective neurologic deficits caused by smaller, circumscribed lesions of the central nervous system (CNS)), epileptic seizures
- Clouding of consciousness (most severe form of qualitative disorder of consciousness).
- Pronounced cognitive deficits (within three months, with memory impairment as a leading symptom.
[autoimmune encephalitis: pleocytosis in cerebrospinal fluid.]
- Electrolytes – calcium, chloride, potassium, magnesium, sodium, phosphate.