S09C79 - LGIB Flashcards
1
Q
LGIB: defn
A
bleeding from GIT distal to ligament of treitz
2
Q
LGIB: common causes
A
- diverticular dz
- colitis
- polyps
- malignancies
3
Q
LGIB: factors assoc with high morbidity
A
- unstable
- repeated hematochezia
- blood on examiners globe
- hct 2 comorbidities
4
Q
LGIB: causes
A
- diverticulosis
- vascular ectasia
- mesenteric ischemia, ischemic colitis
- meckel diverticulum
5
Q
Diverticulosis
A
- painless bleeding
- may be massive
- 90% resolve spontaneously
- right sided bleed more often
6
Q
Ischemic colitis: RF
A
- aneurysmal rupture
- vasculitis
- prolonged exercise
- cardiovascular insult
- IBS
- hypercoagulable states
=most cases resolve on own, 20% require Sx
7
Q
Mesenteric ischemia: causes/RF
A
- thrombosis/embolus of SMA
- shock
- a. fib
- > 60yo
- CHF, recent MI
- post-prandial abdo pain
- unexplained wt loss
-survivial 50% w/in 24h
8
Q
Meckel diverticulum
A
- most commonly found in terminal ileum
- contain gastric tissues that secrete enzymes that erode mucosal wall
9
Q
*delayed hemorrhage can be seen __ weeks post polypectomy
A
3 weeks
