Multiple choice

Paresthesia eliciting during an inferior alveolar nerve block is due to ____________.

  1. poor technique

  2. acidic ph of the local anesthetic solution

  3. contact of the needle with the nerve trunk

  4. sodium conductance through the nerve membrane

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Reasons for persistent paresthesia (persistent anaesthesia) are as follows: a. Injection of a local anaesthetic solution contaminated by alcohol or sterilizing solution as these are irritant (alcohol is neurolytic) b. Trauma to the nerve sheath produced by the needle during injection c. Hemorrhage into or around the neural sheath can also cause paresthesia due to pressure over the nerve