Nocturnal Fecal Incontinence Diagnostic Considerations
Key Diagnostic Considerations
- Completing a 3-day frequency-volume chart to document 24-hour urine output patterns can help identify nocturnal polyuria, which can contribute to nocturnal bowel distention and overflow incontinence, as recommended by the American Urological Association 1, 2
- Screening for diabetes mellitus and neurologic diseases, such as stroke or multiple sclerosis, can help identify underlying conditions that may impair rectal sensation and arousal mechanisms, contributing to nocturnal fecal incontinence, according to the American Urological Association 3
- Evaluating for sleep apnea can help identify sleep disturbances that may impair normal arousal to defecatory urges, as suggested by the American Academy of Sleep Medicine 2, 3
Specific Red Flags Requiring Urgent Evaluation
- Nocturnal diarrhea with weight loss warrants colonoscopy with biopsies to exclude microscopic colitis, inflammatory bowel disease, or malignancy, as recommended by the European Society of Gastrointestinal Endoscopy 4
- Recent onset nocturnal incontinence combined with severe watery diarrhea should prompt evaluation for bile acid diarrhea with serum testing or SeHCAT scanning, according to the European Society of Gastrointestinal Endoscopy 4
Common Pitfalls to Avoid
- Fecal impaction with overflow should not be overlooked, as it commonly presents as nocturnal soiling and requires digital rectal examination, as recommended by the American Heart Association 5, 6
- Concurrent constipation must be treated first before other interventions will be effective, according to the American Gastroenterological Association 5, 6, 7