Efficient diagnosis of suspected functional bowel disorders

Area of Science:

• Gastroenterology
• Internal Medicine

Background:

• Functional bowel disorders (FBDs) are prevalent conditions characterized by abdominal pain, bloating, and altered bowel habits.
• Current diagnostic approaches for FBDs can lead to significant healthcare costs due to potentially unnecessary investigations.

Purpose of the Study:

• To outline a cost-effective diagnostic strategy for functional bowel disorders.
• To differentiate FBDs from organic gastrointestinal diseases based on symptom presentation and alarm features.

Main Methods:

• Diagnosis of FBDs relies on a combination of typical symptoms, normal physical examination, and the absence of alarm features.
• Initial laboratory investigations include complete blood count, erythrocyte sedimentation rate, and celiac disease serology.
• Alarm symptoms prompting further investigation include gastrointestinal bleeding, symptom onset after age 50, family history of colorectal cancer, weight loss, and nocturnal symptoms.

Main Results:

• For most patients presenting with typical FBD symptoms and no alarm features, no further investigations beyond basic laboratory tests are typically required.
• The presence of alarm symptoms necessitates further diagnostic work-up, although it does not exclude an FBD diagnosis.
• Patients with severe and predominant diarrhea may require a more comprehensive evaluation, including colonoscopy and bile-acid malabsorption testing.

Conclusions:

• A symptom-based diagnostic approach with judicious use of investigations can optimize the diagnosis of FBDs.
• Identifying alarm features is crucial for determining the need for further investigations to rule out organic gastrointestinal pathology.
• Tailoring the diagnostic work-up based on symptom severity and specific features, such as predominant diarrhea, improves diagnostic accuracy and cost-effectiveness.