Table 1 Definition of perineal trauma [2]
Degree | Trauma to Perineum |
|---|---|
First degree | Laceration of vaginal epithelium or perineal skin |
Second degree | Involvement of perineal muscles, not anal sphincter |
Third degree | Disruption of anal sphincter muscles – |
3a: <50% external sphincter torn | |
3b: >50% external sphincter torn | |
3c: external and internal sphincter torn | |
Fourth degree | Third degree tear with rupture of trauma to anal epithelium |