While suturing a wound, you opt to use lidocaine with epinephrine. The rationale for your choice is:
A an increase in the absorption of the lidocaine.
B an increase in the diffusion of the lidocaine into the nerve's myelin sheath.
C an increase in the blood flow to the area of injection.
D an increase in the duration of anesthesia.
E a decrease in the risk of infection at the site of injection.
Answer: D
Lidocaine with epinephrine both increases duration of anesthesia and decreases blood flow to the area of injection-i.e. penis, nose, fingers, toes
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