Classification of Perineal Tear

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.

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