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Flashcards in Perineum Deck (9)
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Diamond shaped

Divided by a line passing through the ischial tuberosities into the anal triangle & the Urogenital triangle

Perineum

1

Starts at frenulum of labia minora

Proceeds directly downward through the ff:
- skin
- vaginal wall
- perineal body
- superficial transverse perineal muscle

External anal sphincter muscle may be cut inadvertently

Median episiotomy

2

Starts at frenulum of labia minora

Proceeds at 450 angle through the ff:
- skin
- vaginal wall
- bulbospongiosus muscle

Roomier than median episiotomy

Mediolateral episiotomy

3

Boundaries:
- superior fascia of Urogenital diaphragm
- inferior fascia of Urogenital diaphragm (perineal membrane)

Deep perineal space

4

Structures within the deep perineal space (male)

Membranous urethra

Urogenital diaphragm
- deep transverse perineal muscle
- sphincter urethrae muscle

Branches of internal pudendal artery
- artery of the penis

Branches of the pudendal nerve
- dorsal nerve of the penis

Bulbourethral glands (Cowper glands)

5

Structures within the deep perineal space (female)

Urethra

Vagina

Urogenital diaphragm
- deep transverse perineal muscle
- sphincter urethrae muscle

Branches of internal pudendal artery
- artery of the clitoris

Branches of the pudendal nerve
- dorsal nerve of the clitoris

No glands

6

Boundaries:
- inferior fascia of the Urogenital diaphragm (perineal membrane)
- superficial perineal fascia - continuous with COLLE'S fascia

Superficial perineal space

7

Structures within the Superficial perineal space (male)

Penile (spongy) urethra

Bulbospongiosus muscle

Ischiocavernosus muscle

Superficial transverse perineal muscle

Branches of the internal pudendal artery:
- perineal artery --> posterior labial artery
- dorsal artery of the penis
- deep artery of the penis

Branches of the pudendal nerve:
- Perineal nerve --> posterior scrotal
- dorsal nerve of penis

Bulb of penis

Crura of the penis

Perineal body

Duct of the bulbourethral gland

8

Structures within the superficial perineal space (female)

Urethra

Vestibule of the vagina

Bulbospongiosus muscle

Ischiocavernosus muscle

Superficial transverse perineal muscle

Branches of the internal pudendal artery:
- perineal artery --> posterior labial artery
- dorsal artery of the clitoris
- deep artery of the clitoris

Branches of the pudendal nerve:
- Perineal nerve --> posterior scrotal/labial nerves
- dorsal nerve of clitoris

Vestibular bulb

Crura of the clitoris

Perineal body

Greater vestibular glands (Bartholin glands)