Regional Anaesthesia Blocks
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þ Mental Nerve Block, intraoral approach:
 - Insert the needle inside the lower lip at its junction with the lower gum,
   just posterior to the lower first premolar (or just anterior to the second
   premolar) on the side you wish to block.
   Ref: Tintinalli 3rd ed. p 1034

þ Intercostal Nerve Block
 - The nerve is located just below the rib, and can be blocked anywhere
   between the fracture site and the paravertebral area (where the rib and
   vertebra meet).  The posterior angle of the rib (about 6 cm lateral to the
   spinous process) is often the best place for an intercostal nerve block.
   This site is often avoided in favor of a safer location because a block at
   this site can cause marked irreversible hypotension by affecting the
   autonomic fibers.
   Ref: Schwartz 3rd ed. p 734