Trans - Perineum and External Genitalia Flashcards Preview

[OS 206] 1st Exam > Trans - Perineum and External Genitalia > Flashcards

Flashcards in Trans - Perineum and External Genitalia Deck (105)
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1

What is immediately anterior to the perineum?

Pubic symphysis

2

The ischial tuberosities are located _____ to the perineum

Lateral

3

The anal canal is found in the

Anal triangle

4

What encloses the urogenital triangle?

Perineal membrane

5

Ischiocavernosus: action

Forces blood from cavernous spaces in crura into distal parts of corpora cavernosa

6

What muscles compress the bulb of the penis and the corpora spongiosum?

Bulbospongiosus
Bulbocavernosus

7

Aids pelvic diaphragm in supporting pelvic viscera

Superficial transverse perineal muscles

8

Bartholin’s gland: function

Lubricates vaginal canal by secreting mucus

9

What is located immediately inferior to the deep perineal space?

Perineal membrane

10

Most prominent blood vessel in the deep perineal space

Deep dorsal vein of the penis / clitoris

11

Lubricates and cleanses the urethra during ejaculation

Cowper’s gland

12

The deep post-anal space is where the ____ communicate

Ischiorectal fossa

13

Medial boundary of the ischiorectal fossa

External anal sphincter

14

What nerves are in the ischiorectal fossa?

1. Perforating cutaneous branches of S2 and S3
2. Perineal branch of S4

15

Voluntary sphincter surrounding the inferior 2/3 of the anal canal

External anal sphincter

16

Prolapse of the bladder and / or uterus is caused by:

Stretching or tearing of the perineal body

17

Location of the perineal body

Central point of perineum

18

What four muscles converge at the central point of the perineum?

1. Bulbocavernosus
2. Superficial transverse perineal
3. External anal sphincter
4. Levator ani

19

The central point of the perineum is important because:

It determines whether the surgeon should go medial or mediolateral during an episiotomy

20

Episiotomy: definition

Surgical incision of perineum and interoposterior vaginal wall performed just prior to delivery to prevent perineal lacerations

21

This type of episiotomy heals faster

Medial

22

Episiotomy in which muscles are severed

Mediolateral

23

Why are mediolateral episiotomies done?

If the length of the perineal body is less than 3mm, a mediolateral episiotomy must be performed to prevent complications

24

Perineal lacerations are often caused by

Unprotected childbirth

25

What muscles are involved in a first degree perineal laceration?

None

26

T/F: A second degree perineal laceration does not involve urogenital structures

F

27

What muscle is cut in a third degree perineal laceration?

External anal sphincter

28

Primary function of external genitalia

Copulation and parturition

29

T/F: During the sixth week of gestation, genitalia can be differentiated

F

30

At what age of gestation are sex indicators present?

Seventh week AOG