The Bowel and Absorption Flashcards
Name some causes of osmotic diarrhoea
Laxitives
Sugary based products
Magnesium based products
Coeliac
Diabetes
Name some causes of secretory diarrhoea
IBD
Toxins
What are some red flags for diarrhea?
Weight loss
blood
Night time defacation
What is the significance of not passing meconium before 2 days?
?Hirschprungs
Where is water mainly absorped?
Small intestine
Which part of the bowel only absorbs water?
Colon
What are the key structural points and what does the part of the bowel secrete:
Jejenum
Ileum
Ileocecal valve
Colon
What does the part of the bowel absorb and what does resection/damage result in:
Jejenum
Ileum
Ileocecal valve
Colon
What does the jejenum absorb?
Fats, carbs, protein, thiamine, Vit c
ADEK
What does the ileum absorb?
Electrolytes and minerals
Vits ADEK (proximal)
What does the terminal ileum absorb?
B12
Bile
What is the main result of reduced jejunum absorption?
Diarrhoea
Scurvy - mucous membrane changes, malaise and lethargy, bruising and petichae
What is the main result of reduced ileum absorption?
Macrocytic anaemia
Reduced clotting
Hypocalcaemia
Reduced bile so gall stones and steatorrhoea
What is the main result of ileocecal valve dysfunction?
Increased infection
Where are short chain fatty acids absorped?
Colon
What are the fat soluble vitamins, where are they absorped and what do they do/what does a lack of them lead to?
Jejenum and proximal ileum
A - Vision - Night blindess
D - Bones and growth - ricketts oseteomalacia
E - Neurological/CVS
K - Clotting
How does the hydrogen breath test work?
Patient given sample of sugar in question.
If it isnt absorbed the bacteria use it and hydrogen is given off.
Increased hydrogen equals decreased absorption
Sugar breakdown
Sugar absorption
