PPE
Local anesthetic
27-30ga needle
5-10 mL Syringe
Iodine or chlorhexadine prep
1% soln contains 10 mg/ml
2% soln contains 20 mg/ml
0.5% soln contains 5 mg/ml
May cause cardiac arrest if injected intravascularly
Do not buffer with bicarbonate
Previously, "conventional wisdom" argued that it is unsafe to use epinephrine in<unk>  local anesthesia.
However, many studies going back more than a decade have shown that using local anesthetic with epinephrine is safe for use in digits.
A Cochrane Review concurs that no adverse effects have been reported, but notes that the level of evidence is poor and further high quality studies are required.
Digital block
Hair tourniquet
Nerve Block: Occipital
Nerve Block: Foot
Trifascicular Block
Nerve block: Auricular
Tourniquet 
Tourniquet