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Sunday, July 27, 2014

Why Constipation Occurs.. Prevention and Remedies

Constipation is a common cause of painful defecation. Severe constipation includes obstipation (failure to pass stools or gas) and fecal impaction, which can progress to bowel obstruction and become life-threatening. Constipation refers to bowel movements that are infrequent or hard to pass.






Constipation is a symptom with many causes. These causes are of two types: obstructed defecation and colonic slow transit (or hypomobility).

About 50% of patients evaluated for constipation at tertiary referral hospitals have obstructed defecation.[3] This type of constipation has mechanical and functional causes.

Causes of colonic slow transit constipation include diet, hormonal disorders such as hypothyroidism, side effects of medications, and rarely heavy metal toxicity. Because constipation is a symptom, not a disease, effective treatment of constipation may require first determining the cause.

Treatments include changes in dietary habits, laxatives, enemas, biofeedback, and in particular situations surgery may be required.

Constipation is common; in the general population incidence of constipation varies from 2 to 30%. In the United States expenditures on medications for constipation are greater than $250 million per year.

The causes of constipation can be divided into congenital, primary, and secondary. The most common cause is primary and not life-threatening.

In the elderly, causes include: insufficient dietary fiber intake, inadequate fluid intake, decreased physical activity, side effects of medications, hypothyroidism, and obstruction by colorectal cancer.

Constipation with no known organic cause, i.e. no medical explanation, exhibits gender differences in prevalence: females are more often affected than males.

The diagnosis is essentially made from the patient's description of the symptoms. Bowel movements that are difficult to pass, very firm, or made up of small hard pellets (like those excreted by rabbits) qualify as constipation, even if they occur every day.

Other symptoms related to constipation can include bloating, distension, abdominal pain, headaches, a feeling of fatigue and nervous exhaustion, or a sense of incomplete emptying.



Inquiring about dietary habits will often reveal a low intake of dietary fiber, inadequate amounts of fluids, poor ambulation or immobility, or medications that are associated with constipation.


During physical examination, scybala (manually palpable lumps of stool) may be detected on palpation of the abdomen. Rectal examination gives an impression of the anal sphincter tone and whether the lower rectum contains any feces or not.

Rectal examination also gives information on the consistency of the stool, presence of hemorrhoids, admixture of blood and whether any tumors, polyps or abnormalities are present.

Physical examination may be done manually by the physician, or by using a colonoscope. X-rays of the abdomen, generally only performed if bowel obstruction is suspected, may reveal extensive impacted fecal matter in the colon, and confirm or rule out other causes of similar symptoms.


Chronic constipation (symptoms present at least three days per month for more than three months) associated with abdominal discomfort is often diagnosed as irritable bowel syndrome (IBS) when no obvious cause is found.


Colonic propagating pressure wave sequences (PSs) are responsible for discrete movements of the bowel contents and are vital for normal defecation.

Deficiencies in PS frequency, amplitude and extent of propagation are all implicated in severe defecatory dysfunction (SDD).

Mechanisms that can normalise these aberrant motor patterns may help rectify the problem. Recently the novel therapy of sacral nerve stimulation (SNS) has been utilized for the treatment of severe constipation.

Constipation is usually easier to prevent than to treat. Following the relief of constipation, maintenance with adequate exercise, fluid intake, and high fiber diet is recommended. Children benefit from scheduled toilet breaks, once early in the morning and 30 minutes after meals.

Treatment

The main treatment of constipation involves the increased intake of water and fiber (either dietary or as supplements). The routine use of laxatives is discouraged, as having bowel movements may come to be dependent upon their use.

Enemas can be used to provide a form of mechanical stimulation. However, enemas are generally useful only for stool in the rectum, not in the intestinal tract.

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