Table investigations and rationale

Investigation	Rationale
Haemogram: Hb, TC, DC, ESR, Platelets, Indices	To evaluate infective etiology, anemia
RFT: Urea, creatinine, sodium, potassium	To evaluate renal causes and electrolyte imbalances
LFT: Total/direct bilirubin, AST, ALT, ALP, GGT, total protein, albumin, globulin, A/G ratio	To evaluate hepatic causes, acute/chronic liver disease, hepatic encephalopathy
TFT: T3, T4, TSH	To evaluate thyroid etiology
Sugars: RBS, FBS, PPBS, HBA1C	Hypoglycemia/hyperglycemia related causes
Urine complete analysis, microscopy, and urine drug screening	For detection of substances
Serum toxicology	Based on the history
Drug levels	If on valproic acid, lithium, carbamazepine, phenytoin, and toxicity is suspected
Ultrasound abdomen and pelvis	Based on history and indication: Blunt trauma abdomen
12-Lead ECG	For cardiac causes and cardiac monitoring for medication-related changes
CT/MRI brain/part of the interest	As per the history and indication
Lumbar puncture and EEG	As per the indication

Hb – Hemoglobin; HBA1C – Hb A1C; AST – Aspartate transaminase; ALT – Alanine aminotransferase; FBS – Fasting blood sugar; CT – Computed tomography; MRI – Magnetic resonance imagin