Only necessary in patients with significant injury or volume of<unk> 
CBC
Chemistry
Lactic Acid
In Alkali<unk> , presence of acidemia or hyperlactemia is likely indicative of clinically significant tissue injury
ECG
Calcium and Magnesium level (if hydrofluoric acid exposure)
Free Fluoride binds rapidly to calcium and magnesium leading to severe hypocalcemia and hypomagnesemia that can be life threatening
Acetaminophen and Salicylate levels (in patients with concern for intentional<unk> 
In Alkali<unk> , presence of acidemia or hyperlactemia is likely indicative of clinically significant tissue injury
Free Fluoride binds rapidly to calcium and magnesium leading to severe hypocalcemia and hypomagnesemia that can be life threatening
3-View CXR
Look for free air under the diaphragm or signs of mediastinal air
Button battery XR - two rings, will likely need to remove it no matter where it is, whether post-pyloric or pre-pyloric
CT with contrast
Consider when perforated viscus is suspected but CXR is negative
Look for free air under the diaphragm or signs of mediastinal air
Consider when perforated viscus is suspected but CXR is negative
Caustic ingestion
Laundry detergent pod ingestion
Caustic eye exposure 
Hymenoptera stings
Caustic dermal burn
Lightning injuries
Airbag-related burns
Neurotoxic shellfish poisoning