Myer-Cotton Grade (Subglottic Stenosis)
Myer-Cotton (Cotton-Myer) grading of subglottic stenosis by the percent obstruction of the subglottic airway lumen, grades I/II/III/IV.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Cotton-Myer grade
- Grade II - 51% to 70% obstruction
Result: Cotton-Myer grade II: 51% to 70% obstruction of the subglottic lumen.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Grade I
- 0% to 50% obstruction of the subglottic lumen.
- Grade II
- 51% to 70% obstruction.
- Grade III
- 71% to 99% obstruction.
- Grade IV
- No detectable lumen (complete obstruction).
What you enter
- Cotton-Myer grade
How this is calculated
Myer CM 3rd, 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):319-323. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.