What is characteristic of third-degree perineal lacerations?
a. Extends into the mucous membrane
b. Extends into the muscles of the perineal body
c. Extends through the rectal mucosa into the anterior wall of the rectum
d. Extends into the anal sphincter
ANS: D
Perineal lacerations are categorized by the following:
• First degree: extends through the skin and in the mucous membrane.
• Second degree: extends through the skin and mucous membrane and into the muscles of the perineal body.
• Third degree: involves the skin, mucous membrane, muscles of the perineal body, and the anal sphincter.
• Fourth degree: extends through the rectal mucosa into the anterior wall of the rectum.
If lacerations of the perineum occur during delivery, they are classified in one of four degrees, depending on severity of the tear.
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