|
Grade |
Description |
|
Grade 1 |
Vaginal mucosa and perineal skin injury only. |
|
Grade 2 |
Involves perineal muscles (not anal sphincter). |
|
Grade 3 |
Anal sphincter injury:
- 3a: <50% EAS torn - 3a: >50% EAS torn - 3c: Complete EAS & IAS tear |
|
Grade 4 |
Complete EAS, IAS, and rectal mucosa tear. |