Disorders of the Digestive System.

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Disorders of the Digestive System

Diarrhea:

        Diarrhea is defined as the excessively frequent passage of unformed stool. The symptom has many possible causes. Most acute diarrheas are of infectious origin or are stress related and because they are self-limited, require no treatment. Diarrhea is generally divided into two types; large volume and small volume diarrhea. Large volume diarrhea implies hypersecretion, which is usually of small intestinal etiology. Large volume diarrhea also may result from an osmotic overload. Small volume diarrhea is due to increased propulsive activity and is most commonly seen irritable bowel syndrome (Beeson, McDermott, Wyngaarden, 1479).

Treatment:

        Treatment demands electrolyte replacement and immediate withdrawal of the offending agent if this is known, as well as treatment of the underlying disorder. Glucose added to oral electrolyte solutions improves absorption, because glucose is actively absorbed and carries with it obligatory fluid and consequently electrolyte absorption. Bed rest often provides symptomatic relief. Mild diarrheas may be treated with binding agents such as aluminum hydroxide gel, kaolin, pectin, and bismuth. A general rule is that medication should be withdrawn as soon as the diarrhea appears to be under control (Beeson, McDermott, Wyngaarden, 1480).

Constipation:

        Constipation is the infrequent and difficult passage of stool. Both frequency, which may be objective, and difficult passage, which is subjective, are relative concepts. The diagnosis of constipation is most readily established for a given individual on the basis of a significant change in frequency of stool along with increasing difficulty in passage (Beeson, McDermott, Wyngaarden, 1480).

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Patho-Physiology:

        Colonic mutility studies by radiologic and manometeric methods indicate two major motor disturbances leading to constipation: spasticity on the one hand and atonicity on the other. Spastic constipation, seen for exampler in irritable bowel syndrome, is often associated with hard, pellet like stools (Beeson, McDermott, Wyngaarden, 1480).

Causes of Constipation:

        The most common form of constipation, imaginary constipation, is based on public misconception, often enhanced by media advertisements extolling the virtues of “regularity”, implying that a specified number of movements (usually one a day) represents the rigid limits of normal. This can lead to a secondary form of ...

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