Grading Scale
Each of the following areas is scored according to the scale below.
Epiglottis, False Cords and Arytenoids
Edema
- Normal: 0
- Mild :1
- Moderate: 2
- Severe: 3
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Erythema/Hyperemia
- Normal: 0
- Mild: 1
- Moderate: 2
- Severe: 3
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Posterior Commissure and Piriform Recess
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Calculating the SGI
The SGI is calculated by adding the score of each of the five areas. The score can range from 0-22.
View Scoring Sheet
1. Epiglottis
- Edema: 0-3
- Erythema/Hyperemia: 0-3
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2. False Cords
- Edema: 0-3
- Erythema/Hyperemia: 0-3
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3. Arytenoids
- Edema: 0-3
- Erythema/Hyperemia: 0-3
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4. Piriform Recess
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5. Posterior Commissure
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Severity Based on the SGI
The severity of upper airway irritation can range from normal to severe, depending on the total SGI score.
- Normal: 0 - 4
- Mild: 5 - 9
- Moderate: 10 - 16
- Severe: 17 - 22
Comparison of Two Normal Upper Airways