Family physicians repeatedly see p...

Family physicians repeatedly see patients who have abdominal pain and altered bowel habits. It is a challenge to suitably evaluate these patients and differentiate between irritable bowel syndrome (IBS) and life-threatening illnesses of the gastrointestinal tract.

IBS is single of the most common chronic gastrointestinal illnesses. IBS traditionally has been a diagnosis of exclusion, based forward history, physical examination, and a negative battery of diagnostic studies. There are no structural or chemical markers for IBS. (1) Diagnostic exhibitions are frequently overused because physicians are make uneasyed about missing a life-threatening illness. (2)

Epidemiology

Americans employ $8 billion each year in succession medical costs related to IBS, (3) and absenteeism resulting from IBS significantly affects the work force. Studies have shown that IBS affects 3 to 22 percent of someones worldwide. (4) Symptoms are reported at 12 percent of Americans and are the cause of 20 to 50 percent of referrals to gastroenterology clinics. (56) in the greatest degree people with IBS do not try to get medical care. One half of patients lay open symptoms before 35 years of age, and 40 percent of patients evolve symptoms between 35 and 50 years of age. assault in elderly persons is rare.

IBS is recognized in children, and many patients can trace their symptoms to childhood. single study found that 26 percent of children with renewed abdominal pain were diagnosed with IBS, making it a often met with reason for school absenteeism. (7) Seventy percent of patients with IBS are women; 48 to 79 percent of patients with chronic pelvic pain, dyspareunia, dysmenorrhea, or a history of numerous abdominal surgeries also have IBS. (8) Women who have had a hysterectomy for chronic pelvic pain are twice as likely to have IBS. (2)

Signs and Symptoms

The mostly common symptoms of IBS include a change in the appearance or oftenness of stools, and abdominal pain that is relieved from defecation. Other associated symptoms include bloating, distention, mucus in the stool, goad and a feeling of incomplete evacuation.

Based in succession stool-habit alteration, three subgroups of IBS have been described: constipation-predominant IBS, diarrhea-predominant IBS, and IBS with alternating bowel habits (also known as pain-predominant). (9) Although these groupings are useful for research final causes symptom patterns may vary.

Factors Associated with IBS

A structural or biochemical mechanism for IBS has not been identified. However, dietary, bowel-motility, enteric nervous classification psychiatric, and other factors have been associated with IBS (Table 1)

DIETARY FACTORS

Allergy. Despite the fact that feed intolerance is reported in 50 percent of patients with IBS, there is no proven causal association with nourishments (10) Only a small number of patients--usually those with previously identified lactase deficiency or atopy--have a genuine subsistence allergy or intolerance. (11)

Fiber Intake. Lack of dietary fiber has been implicated in IBS. This disorder is rare in eastern Africa, where a high-fiber diet is customary However, fiber supplementation helps barely a small percentage of patients. (6)

BOWEL-MOTILITY FACTORS

Patients with IBS have small-bowel motor abnormalities. (12) After a standardized meal, patients in single in kind study experienced increased random motility of the jejunum (13) [Evidence of the same height C, consensus/expert guidelines] Small-bowel motor dysfunction with concomitant gastroparesis take places more frequently in patients with IBS. (14)

ENTERIC NERVOUS order FACTORS

Patients with IBS have a determination to overreact to stimuli that increase intestinal motor activity. Altered embowel perception and a lowered entrance for pain and rectal hurry are more common in patients with IBS. (615) Symptoms can be reproduc during endoscopy.

PSYCHIATRIC FACTORS

Although psychiatric illness ofttimes coexists with IBS, a clear causal relationship has not been shown (16) IBS might be a precursor to psychiatric illness; anxiety, major depression, panic disorder, social phobia, somatization disorder, and dysthymia have been identified in more than 50 percent of patients with IBS. (17) IBS is more customary in patients who abuse alcohol and in patients who have experienced physical or sexual abuse. Many patients with IBS had stressful life affairs such as divorce or a death in the family, before they discloseed symptoms.

OTHER FACTORS

Rates of IBS among patients with chronic fatigue syndrome fibromyalgia, and temporomandibular joint syndrome are high (92 77 and 64 percent respectively). (18)

Differential Diagnosis

Many illnesses share one of the same symptoms as IBS. (1920) more [i]or[/i] less of these illnesses are serious and require aggressive evaluation and treatment. A differential diagnosis for patients who not away with abdominal pain and altered bowel habits is summarized in Table 2 (19)

Diagnostic Tools

To date, no gold standard or marker for IBS exists. A cost-effective diagnostic approach that uses the fewest standards and invasive studies is greatest in quantity desirable. (21)