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Cotton Myer Subglottic Stenosis Grading Scale

Grade

Grade I

Grade II

Grade III

Grade IV

Percent of Obstruction

0 – 50

51 – 70

71 – 99

Complete Obstruction

Myer CM, O’connor DM, Cotton RT. Proposed grading system for subglottic stenosis based on endotracheal tube sizes. Ann Otol Rhinol Laryngol. 1994;103(4 Pt 1):319-23.

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