L16: Constipation & Diarrhea Flashcards
Def of Constipation
Incidence of Constipation
affects more than one in five of
The population
Causes of Constipation
- Poor dietary and behavioral habits (the most common)
- Structural abnormalities
- Systemic diseases
- Drugs
Causes of Constipation
- Poor dietary and behavioral habits (the most common)
- Low-fiber diet
- Decreased intake of fluids
- Ignoring desire of defecation
- Lack of exercise
Causes of Constipation
- Structural Abnormalities
Causes of Constipation
- Endocrinal Causes
hypothyroidism, diabetes mellitus & hyperparathyroidism
Causes of Constipation
- Metabolic Causes
hypokalemia, hypercalcemia & uremia
Causes of Constipation
- Neurological Causes
paraplegia, parkinsonism & multiple sclerosis
Causes of Constipation
- Other causes
amyloidosis, scleroderma
Causes of Constipation
- Drugs
Def of Refractory constipation
It includes patients without identifiable causes and who do not respond to conservative dietary management.
these patients can be divided into 2 categories:
- Colonic inertia (slow colonic transit)
- Outlet disorders
Characters of Colonic inertia
There is prolonged colonic transit time more than 72 hours (normal is 35 h)
Another Name of Colonic inertia
Chronic intestinal pseudo-obstruction
Causes of Colonic inertia
- Idiopathic: isolated to the colon or part of generalized disorder
- Psychogenic
Examples of Outlet disorders Causing refractory constipation
Rectocele & rectal prolapse
Rectal intussusception
Anismus
These patients may complain of …..
excessive straining with sense of incomplete evacuation the need for digital pressure on the Vagina or perineum
Evaluation of a case of Constipation
Investigations in Constipation
Measurement of the colonic transit time in constipation
- 24 radi0-opaque plastic markers are swallowed on 3 consecutive days.
- An abdominal radiograph is taken on days 4 and 7, and the total number of markers remaining in the colon is counted.
Defecography in Constipation
video study taken during straining and defecation.
Alarm symptoms of Constipation
TTT of Constipation
Types of Laxatives used in Constipation
- Osmotic laxatives: (Stool softeners)
- Cathartic (Stimulant) laxatives
Examples of Osmotic Laxatives
as lactulose, sorbitol & docusate sodium.
SE of Osmotic Laxatives
They are safe and do not cause dependency.
Examples of Cathartic (Stimulant) laxatives
bisacodyl, castor oil & Senna
Uses of Cathartic (Stimulant) laxatives
They are used in acute constipation and may cause severe cramps & diarrhea
SE of Cathartic (Stimulant) laxatives
Chronic use of these agents should be avoided and may result in loss of normal colonic neuromuscular function.
Enemas in Constipation
by saline (non-irritating), tap water (irritating), or oil retention (Useful for hard or impacted stool) enemas.
TTT of Colonic Inertia
Chronic use of enemas and cathartic agents.
Psychiatric therapy in constipation
for patients with psychological disorders
Surgical TTT of Constipation
for outlet obstruction & cancer
Def of Dysentery
It means diarrhea associated with blood, mucous and tenesmus.
Def of Tenesmus
Tenesmus means painful defecation with sense of incomplete evacuation
Etiology of desentery
CP of desentery
Evaluation of desentery
Sigmoidoscopy in ameobic dysentry
Flask shaped ulcers with intervening healthy mucosa
Sigmoidoscopy in bacillary desentery
Diffuse inflammation with dirty yellowish pseudo membrane
Sigmoidoscopy in Bilharzial dysentery
Polyps and ulcers
TTT of dysentery