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Chapter 3. Preparation for Awake Intubation

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The lower border of the quadrangular ligament forms

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A. the true vocal cord

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B. the false vocal cord

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C. the aryepiglottic ligament

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D. the triangular ligament

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E. the hyoepiglottic ligament

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

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

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A. 1%

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B. 2%

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C. 4%

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D. 10%

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E. 15%

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

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Benzocaine

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A. is an ester

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B. is metabolized to para-aminobenzoic acid

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C. can produce methemoglobinemia

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D. is an effective topical anesthetic

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E. all of the above

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(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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