Potassium fluoride,anhydrous
           Potassium fluoride,extra pure
           Potassium fluoride,Granular
           Silicon Dioxide
           Hydrofluoric acid
           Synthetic Cryolite
           Potassium Fluoaluminate
           Ammonium bifluoride
           Potassium Bifluoride
           Aluminium fluoride
           Sodium fluoride
           Potassium Fluorosilicate
           Fluorosilicic Acid
           Sodium silicofluoride
           Potassium Hydroxide Flakes
           Magnesium Fluoride
           Magnesium fluorosilicate
           Barium Fluoride
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Most authors agree that infiltration is unnecessary for burns with Hydrofluoric acid concentrations ≤20%.  As mentioned, the efficacy of infiltration is controversial in the literature, and most surgeons reserve the use of infiltration for the moderate to severe burns. Indications described in the literature include a central hard grey area with surrounding erythema (signifying a moderate to high concentration >20% causing deep burns), and throbbing severe pain despite management with irrigation and gel. 

Intra-arterial calcium infusion is reserved for patients with severe Hydrofluoric acid burns with unrelenting pain despite aggressive calcium gel therapy. The technique was originally developed for high-concentration HF digital burns in which large numbers of fluoride ions need to be neutralized but available tissue space was too limited to use the infiltration method safely. Kohnlein and Achinger were the first to describe intra-arterial calcium infusion in 1978 and their protocol consisted of an angiogram to guide the route of infusion to either the radial, ulnar or brachial artery. They used 50 mL of 4% calcium gluconate given over a 4 h period and repeated the cycle every 12 h until the patient was free from pain. 

Hydrofluoric acid burns combined poisoning has attracted attention, which burns small area, if the treatment is not timely, can cause sudden death. To improve awareness of hydrofluoric acid burns merger poisoning, literature, the four cases have treated are shown as follows.