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GastroIntestinal (GI) > Constipation > Flashcards

Flashcards in Constipation Deck (11):
1

What is constipation?

Presence of dried impeacher faeces within the colon

2

What causes constipation?

Obstruction of faecal movement
Hirschprung disease - absence of ganglia of the enteric nervous system.
Hypokalaemia

3

What are symptoms of constipation?

Abdo discomfort
Headache
Loss of appetite
Malaise

4

What is one cause of appendicitis related to faeces?

Calcified faeces in the appendix.

5

What are laxatives?

Treat the constipation

- These increase intestinal peristalsis.
- Soften Faeces
(However may cause loss of Hypokalaemia)

These should be given when:
Straining will cause damage
Before surgery
Treat drug induced constipation/bedridden

6

What are a purgatives?

Completely clean the large bowel

7

What are the types of laxatives?

Bulk laxatives
Osmotic laxatives
Faecal softeners
Stimulant purgatives

8

How do bulk laxatives work?

Indigestible pylorus with Beta 1 linkage that cannot be attacked by digestive enzymes. Stimulate peristalsis
e.g. Methycellulose

9

How do Osmotic laxatives work?

Poorly absorbed salts. Draws water across the freely impermeable wall of the intestine.
e.g. Magnesium sulphate

10

How do Faecal softeners work?

Make the stool slippy
e.g. Docusate sodium, Parafin

11

How do stimulant purgatives work?

e.g. Bisacodyl
Stimulate the enteric nerves and induce purgation.