05 Male Pelvis Perineum

Question 1

What is pelvic fascia

Answer 1

The space between pelvic wall and peritoneum not occupied by viscera

Question 2

Where is seminal vesicles located and where does it secrete into

Answer 2

Back of bladder

Between ampulla of ductus deferens and seminal vesicles

Question 3

What are the openings inside prostatic urethra for gland secretions

Answer 3

Prostatic utricle

Openings of ejaculatory ducts (inferior to prostatic utricle and releases seminal vesicles secretions plus sperms)

Question 4

What are the areas where catheters can be obstructed

Answer 4

External urethral orifice
1st bend
Prostatic urethra due to prostatic utricle

Question 5

List the arterial supply of male pelvis

Answer 5

• Internal iliac -> superior vesicles artery (to bladder and ductus deferens ) and inferior vesicles artery (to prostate, bladder and ductus deferens)
• Inferior vesicle artery branch to give prostatic branch of inferior vesicle artery to supply prostate

Question 6

What forms the diamond shape of perineum and how does this triangle divided

How do these two compartment further separate the perineal structures

Answer 6

Pubis symphisis, ischial tuberosity, coccyx
Anterior into urogenital triangle and posterior into anal triangle
Posterior compartment: ischio-anal fossa separates anal canal from lavator ani from pelvic wall
Anterior compartment: perineal membrane separates it into superficial and deep pouches/part

Question 7

How do you distinguish between male and female pelvis

Answer 7

Pelvic inlet size/shape
Pubic angle
Ischial spine direction
Pubic tubercle and acetabulum ratio
True and false pelvis characteristics

Question 8

What is perineal membrane

Answer 8

Thick triangular fascia structure attached to pubic arch

Anteriorly it forms a small gap and a gap posteriorly

Question 9

What are the contents of superficial perineal pouch

Answer 9

Median erectile tissue: corpus spongiosum - bulb of penis
(In females, it divides round the vestibule to form vestibular bulbs)

Lateral erectile tissue: corporal cavernosae - attached to ischiopubic rami

The two tissues fuse to form shaft and head of penis or clitoris

Question 10

And the blood supply and origin for rectum

Answer 10

Superior rectal artery (IMA)
Middle rectal artery (internal iliac artery)
Inferior rectal artery (internal iliac artery)