20-Colorectal Flashcards Preview

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Flashcards in 20-Colorectal Deck (20):
1

where hindgut starts and ends

distal third of transverse colon to rectum

2

artery supplying hindgut

IMA

3

what are the white lines of Toldt

lateral peritoneal reflections of ascending, descending colon

4

parts of GI tract without serosa

esophagus, middle, distal rectum

5

major anatomic differences between SB, colon

smooth SB, colon has fat appendages (appendices epiploicae), haustra vs plicae circularis/valvulae conniventes, taenia coli

6

arterial blood supply to rectum

proximal: superior hemorrhoidal (rectal) artery from IMA

middle: middle hemorrhoidal (rectal) from hypogastric (internal iliac)

distal: inferior hemorrhoidal (rectal) from pudendal which branches off hypogastric

7

venous drainage of rectum

prox: inf mesenteric vein that joins splenic to drain into portal

middle: iliac v. into IVC

distal: iliac v. into IVC

8

purpose of colon

water, sodium, bile salt absorption, stool storage

9

main nutrient of coloncyte

short-chain FA (butyrate)

10

length of rectum

12-15cm

11

approximate proximal and distal extents of anal canal/rectum/rectosigmoid junction from anal verge

Q image thumb

anal canal: 0-5cm

rectum: 5-15cm

rectosigmoid jxn: 15-18cm

12

2 points that mark location of rectosigmoid jxn

distal point at which taeniae converge at level of sacral promontory

13

Distal extent of rectum according to anatomy vs surgery

anatomy: dentate line

surgery: prox border of anal sphincter complex

14

eponym for extension of peritoneal cavity between rectum and back wall of uterus in females

pouch of Douglas (rectouterine pouch)

15

deepest pt of peritoneal cavity in females

pouch of Douglas

16

other name for rectovesicular fascia in males/rectovaginal fascia in females

Denonvilliers fascia

17

eponym for mass in pelvic cul de sac from drop mets from visceral tumor, may be detected by DRE

Bloomer shelf

18

thick condensation of endopelvic fascia connecting presacral fascia to fascia propria at S4, which then extends to anorectal ring

Waldeyer fascia (rectosacral fascia)

19

artery contained within lateral rectal stalks

middle rectal artery

20

muscles that make up pelvic floor (diaphragm)

pubococcygeous, iliococcygeus, puborectalis (form levator ani)