Labs
CBC
BMP
LFTs and coagulation tests
VBG or ABG
UA: high concentrations of<unk>  in the urine will cause it to appear blue
Urine dithionate test:
Add 1cc of 1% sodium dithionate (hematology labs have this solution) to 10mL urine
Blue color change indicates presence of<unk> 
Imaging
CXR
EKG
consider CT if stable to evaluate for perforation/mediastinitis
CBC
BMP
LFTs and coagulation tests
VBG or ABG
UA: high concentrations of<unk>  in the urine will cause it to appear blue
Urine dithionate test:
Add 1cc of 1% sodium dithionate (hematology labs have this solution) to 10mL urine
Blue color change indicates presence of<unk> 
Add 1cc of 1% sodium dithionate (hematology labs have this solution) to 10mL urine
Blue color change indicates presence of<unk> 
CXR
EKG
consider CT if stable to evaluate for perforation/mediastinitis
Based on urine test
Paraquat toxicity
Caustic Ingestion
Hydrazine toxicity
Toxic Alcohols
Tin toxicity
Foreign Body Ingestion
Kratom toxicity
Burns