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Chapter 3. Preparation for Awake Intubation

The lower border of the quadrangular ligament forms

A. the true vocal cord

B. the false vocal cord

C. the aryepiglottic ligament

D. the triangular ligament

E. the hyoepiglottic ligament

(B) The lower border of the quadrangular ligament forms the false vocal cords.

The maximum effective concentration of topical lidocaine applied to the tongue is

A. 1%

B. 2%

C. 4%

D. 10%

E. 15%

(C) The maximum effective concentration of topical lidocaine applied to the tongue is 4%.

Benzocaine

A. is an ester

B. is metabolized to para-aminobenzoic acid

C. can produce methemoglobinemia

D. is an effective topical anesthetic

E. all of the above

(E) Benzocaine is an ester type of local anesthetic which is metabolized to para-aminobenzoic acid. It can also produce methemoglobinemia.

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