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Table 1 Han grading Scale10

From: Midazolam premedication facilitates mask ventilation in children during propofol induction of anesthesia: a randomized clinical trial

Description/Definition

Grade

Did not attempt

0

Easy mask

1

Difficult mask requiring an oral airway or other adjuvant

2

Very difficult mask ventilation (inadequate, unstable, or requiring two providers)

3

Unable to mask ventilate

4