Free Medical Courses

Master Medical Topics with free online courses for beginners. Learn how to approach a topic and understand critical topics easily.

Definition :

  • The infrequent passage of hard stools is called the Constipation.
  • The chief complaints of the patient’s are straining, a sensation of incomplete evacuation and also perianal or abdominal discomfort.

Causes :

  • Gastrointestinal causes :
    • Due to lack of fibre and fluid intake.
    • It may also be due to slow-transit time, irritable bowel syndrome, chronic intestinal pseudo obstruction and may also be due to some drugs.
    • Structural causes includes Colonic carcinoma, Hirschsprung’s disease and also diverticular disease.
    • Constipation may also be the secondary cause occuring due to Anorectal disease and obstructed defaecation.
  • Non-gatrointestinal causes :
    • It may be due to intake of certain drugs like Opiates, Iron supplements, Anticholinergics, Aluminium containing antacids and also calcium antagonists.
    • Neurological causes includes Multiple sclerosis, Cerebrovascular accidents, Spinal cord lesions, Parkinsonism.
  • Metabolic and endocrine causes :
    • These include Diabetes mellitus, Hypothyroidism, Hypercalcaemia and also Pregnancy.
  • Other causes includes Depression and any other serious illness with immobility particularly in elderly people.

Types of constipation :

  • Simple
  • Severe Idiopathic
  • Constipation of faecal impaction

Simple constipation :

  • Simple type is extremely common and also it does not signify any underlying organic disorder.
  • It usually responds to the increased fluid intake, dietary fibre intake and also to bulking agents.
  • Moreover many types of laxatives are available.

ClassExamples
Bulk-forming laxativesIspaghula husk, methylcellulose
StimulantsBisacodyl, Dantron (only for terminally ill patients), docusate, senna
Faecal softenersDocusate, Arachis oil enema
Osmotic laxativesLactulose, Lactitol, Magnesium salts
OthersPolythylene glycol, phosphate enema

    Severe idiopathic constipation :

    • Occurs exclusively in young women and also often in adolescence.
    • The cause is usually unknown.
    • But some womens are tend to have obstructed bowel.
    • Some women tend to have obstructed defaecation resulting from inappropriate contraction of the external anal spincter and puborectalis muscle.
    • The above condition is often resistant to treatment.
    • Bulking agents tend to exacerbate the condition.
    • But prokinetic agents or balanced solutions of polyethylene glycol benefit some patients with slow transit.
    • Glycerol suppositories and biofeedback techniques are used for people with obstructed defaecation.
    • Other people benefit from Prucalopride or Linaclotide.
    • Rarely, subtotal colectomy may be necessary for the patients with idiopathic constipation.

    Faecal impact :

    • In faecal impact a large mass of faecal matters tend to accumulate in the rectal portion.
    • This tends to occur in immobile, institutional or disabled patients.
    • Moreover this occurs mostly in the elderly patients.
    • Perforation and bleeding from pressure induced ulceration are occassionally seen.
    • Treatment involves adequate hydration and careful digital disimpaction after softening the disimpacted stool with arachis oil enemas.
    • Stimulants should also be avoided.

    Clinical assessment and management :

    • The onset, duration and also characteristics are most important.
    • For example, a neonatal onset suggests a Hirchsprung’s disease, while a recent change in the bowel activity suggests the suspicion of an organic disorder such as colonic carcinoma.
    • The presence of weight loss, rectal bleeding is important as are excessive straining symptoms suggestive of irritable bowel syndrome. a history of childhood constipation and emotional distress.

    Constipation - Laxatives

    Initial visit to the hospital :

    • Digital rectal examination
    • Proctoscopy
    • Sigmoidoscopy
    • Routine biochemistry – Serum calcium, Thyroid function test, Full blood count.
    • If these are found to be normal then 1-month trial of dietary fibre and/or laxatives is justified.

    Next visit :

    • If symptoms persists, then examination of colon by Barium enema or CT colography is indiacted to look for structural disease.

    Further investigation :

    • Intestinal marker studies
    • Anorectal manometry
    • Electrophysiological studies and also
    • Magnetic resonance proctography can all be used to define the problem.

    © Medicinewithyugandhi | All Rights Reserved