The deep perineal fascia, also called Gallaudet fascia or investing fascia of the perineum, covers the superficial perineal muscles: ischiocavernosus, bulbospongiosus and superficial transverse perineal. It lies deep to the membranous Colles fascia and is continuous with Buck fascia of the penis.
| Location | Over the superficial perineal muscles in the urogenital triangle. |
|---|---|
| Boundaries |
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Invests the superficial perineal muscles.
This layer helps define the superficial perineal pouch and is encountered during perineal surgery and repair of obstetric tears. Its continuity with Buck fascia and the abdominal wall fascia explains how fluid from urethral injury can spread.
Bleeding from straddle injury or delivery that collects around the superficial perineal muscles beneath this fascia, causing perineal and labial or scrotal swelling.
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