Miller's Anesthesia Review

Question 1

What three characteristics are nerve fibers classified by?

Answer 1

Fiber diameter, the presence or absence of myelin, and function are the three characteristics by which nerve fibers are classified.

Question 2

How many consecutive nodes of Ranvier must be blocked for the effective blockade of the nerve impulse by local anesthetic?

Answer 2

In general, three consecutive nodes of Ranvier must be exposed to adequate concentrations of local anesthetic for the effective blockade of nerve impulses to occur.