Cotton&;s grading is used for: (A) Subglottic stenosis, (B) Laryngeal carcinoma, (C) Superior nerve palsy, (D) Voice abuse
Answer is A. Subglottic stenosis is graded according to the Cotton-Myer classification system from one to four based on the severity of the blockage. Grade 1 - <50% obstruction Grade 2 - 51-70% obstruction Grade 3 - 71-99% obstruction Grade 4 - no detectable lumen Ref: Internet sources- Wikipedia