ANAT GIT - Week 5 (incl. Workbook) Flashcards
Which parts of the LB are most mobile (i.e., not fixed to the posterior ab wall)?
Descending colon.
3 x structures forming longitudinal muscle of colon
Taenia liberia - free
Mesocolic taenia @ transverse mesocolon
Taenia omenta @ greater omentum
Sites where a diaphragmatic hiatus hernia can occur & names/classifications.
Intestine
Fundus - rolling
LOS - sliding
LOS & fundus - mixed
Peptic ulcer locations
Stomach, duodenum, oesophagus, jejunum (usually associated w Zellinger-Ellison syndrome).
Causes of maelena?
Mallor-Weiss tears, peptic ulcer disease, oesophageal varices, blood disorders (e.g., haemophilia, thromocytopaenia).
What is maleana?
Passing of jet black, tarry, sticky, smelly stools.
What can cause mimick of malaena symptoms?
Iron & bismuth containing medications.
Appendicitis symptoms
Periumbilical pain - becoming sharp, fever, neausea, vomiting, loss of appetite.
Explain why pain of appendicitis typically starts in the umbilical region then shifts to the R iliac fossa?
Initially pain is poorly localised due to just visceral peritoneum being affected -> transferred to R iliac fossa as this is adjacent parietal peritoneum irritated. Parietal peritoneum recruits somatic nerve involvement -> more localised pain.
What dermatome is pain from appendicitis most often associated?
T10.
Explain why a ruptured aneurysm rarely occurs in a mesenteric vessel?
Mesenteric vessels are relatively less compliant & surrounded in mesentery -> toucher -> less likely to bulge. Thus, aneurysm less likely to occur.
Aorta has a thicker tunica intima & more elastin -> stretchier & more susceptible to aneurysm.
Contraction of what structures leads to haustra formation in the LB?
Taenia coli.
What appendages characterise the LB?
Epiploic (fatty) appendiges.
What structure prevents ‘backflow’ from the LB to SB?
Ileocecal fold.
What layer/folds of peritoneum ‘suspend’ the
SB, appendix, transverse colon, sigmoid colon?
Mesentery, mesoappendix, transverse mesocolon, sigmoid mesocolon.
