Pelvis Flashcards
Boundaries of pelvic inlet
ant - symphisis pubis
post - sacral promontory
lat - iliopectineal line
Boundaries of pelvic outlet
ant - pubic arch
post - tip of coccyx
lat - ischial tuberosities
Boundaries of false pelvis
ant - anterior abdominal wall
post - lumbar vertebra
lat - iliac fossa and iliacus muscle
Diameter from sacral promontory to superior margin of pubic symphisis
True conjugate
Diameter from sacral promontory to inferior margin of pubic symphisis
Diagonal Conjugate
Diamater distance between 2 ischial tuberosities
Transverse Diameter
Diameter distance between 2 ischial spines
Interspinous diameter
< 9.5 cm may present barrier to fetus
funnel shaped pelvis with contracted outley
android
long, narrow and oval shaped
anthropoid
wide pelvis flattened at the brim with the promontory of the scrum pushed forward
platypelloid
Contents of pelvic cavity in male
- urinary bladder
- ureter
- vas deferens
- seminal vesicle
- prostate gland
- prostatic urethra
- sigmoid colon
- rectum
Contents of pelvic cavity in female
- urinary bladder
- ureter
- ovary
- uterine tube
- uterus
6 .vagina - sigmoid colon
- rectum
ligaments that divied the sciatic notch
- sacrotuberous ligament
2. sacrospinous ligament
Nerve that enters the greater sciatic foramen and goes superior to piriformis
superior gluteal nerve
Nerves that pass to greater sciatic foramen
- pedendal nerve
- nerve to obturator internus
- internal pudendal vessels
- piriformis
- superior and inferior gluteal vessels and nerves
- sciatic nerve
- posterior femoral cutaneous
- nerve to quadratus femoris
Nerves that pass to lesser sciatic foramen
- pudendal nerve
- nerve to obturator internus
- internal pudendal nerve
- tendon to obturator internus
composition of pelvic diaphragm
- levator ani
2. coccygeus muscle
What structure is weakened in a prolapsed uterus
pubococcygeus muscle
muslces of the levator ani
- puborectalis
- iliococcygues
- pubococcygeus
Which structure divides the perineum into the genitourinary and anal triangles
line from ischial tuberosity
composition of perineal body
midpoint
- convergence of bulbospongiosus
- external anal sphincter
- superficial/deep transverse perineal muscles
Which structure is involved in an infection of ischiorectal fossa
inferior rectal nerve
Contents of ischioanal fossa
- fats
- inferior rectal artery
- inferior rectal vein
- inferior rectal nerve
- perineal branch of the femoral cutaneous nerve
location of sphincter urethra
deep perineal pouch
Contents of superficial pernieal space
- root of penis/clitoris
- superficial perineal muscle
- bulbospongiosus
- ischiocavernosus
- perineal body
- perineal branch of pudendal nerve
Contents of deep perineal space
- membranous urethra/ part of urethra
- bulbourethral gland/ part of vagina
- internal pudendal nerve
- dorsal nerve of penis/clitoris
- sphincter of urethra muscles
- deep transverse perineal muscle
components of anterior division of internal iliac artery
- umbilical - superior vesical
- uterine
- vaginal or inferior vesical
- middle rectal
- obturator
- internal pudendal
- inferior gluteal
components of posterior division of internal iliac artery
- iliolumbar
- lateral sacral
- superior gluteal
Supplies pelvic diaphragm and gluteus maximus
inferior glueal artery
This artery obliterates; superior vesical to superior part of urinary bladder
umbilical artery
supplies pelvic muscles, medial compartment of thigh
obturator artery
supplies anterior and posterior vagina
vaginal artery
supplies fundus of urinary bladder, prostate, seminal vesicle, ductus deferens, lower ureter
inferior vesical artery
supplies uterus, ovary, cervix, vagina
uterine artrery
supplies rectum, anal canal
middle rectal artery
Branches of internal pudendal artery
- inferior rectal artery
- perineal artery
3 dorsal artery of penis/clitoris - superficial perineal artery
- deep artery of penis/clitoris
- perineum, skin, muscle of anal triangle and urogenital triangle and erectile bodies
What is the origin of pudendal nerve
S2 - S4
Branches of pudendal nerve
- inferior rectal
- dorsal nerve to penis/clitoris
- perineal
What is the origin of sciatic nerve
L4.L5 S1 - S3
Branches of sciatic nerve
Posterior division - common peroneal nerve
Anterior Division - tibial nerve
What is the origin of posterior femoral cutaneous nerve
S1 - S3
Posterior branches of posterior femoral cutaneous nerve
- superior gluteal nerve
- inferior gluteal nerve
- piriformis
- perforating cutaneous nerve
Anterior branches of posterior femoral cutaneous nerve
- nerve to quadratus femoris and inferior gemellus
- nerve to obturator internus and superior gemellus
- pudendal nerve
- nerve to levator ani and coccygeus
- perineal nerve
What type of block is done to abolish pain from the anterior part of the perineum
Ilioinguinal nerve block
What is the landmark of pudendal nerve block
- transvaginal - ischial spine
2. perineal - ischial tuberosity