EpistemisFractional defecation
Specialty: Gastrointestinal.
Why it occurs
- Irritable bowel syndrome with altered motility and dysfunctional defecation
- Rectocele or weakness of the rectovaginal septum that prevents complete rectal emptying in a single effort
- Pelvic floor dyssynergia with intermittent spasmodic contraction during evacuation
- Internal rectal mucosal prolapse that temporarily blocks the anal canal
- Rectal hyporeflexia with loss of filling sensitivity.
Initial workup
High resolution anorectal manometry with balloon expulsion test | Magnetic resonance defecography (to visualize the evacuation phases and rule out mucosal entrapment or rectocele) | Complete colonoscopy (to rule out organic pathology or stenosis) | Dynamic rectal examination.
red flags
Rectal bleeding or abundant bloody mucus, unexplained weight loss, persistent rectal pain after defecation attempts, palpable rectal mass during digital rectal examination, family history of colonic neoplasia.
Standard management
- Osmotic laxatives — polyethylene glycol 17 g per day to maintain a soft consistency that requires less emptying effort and facilitates complete emptying
- Soluble fiber — psyllium 5 g per day to group the fecal bolus evenly
- Biofeedback or pelvic floor re-education therapy — main non-pharmacological treatment for dyssynergia
- Lubricating glycerin suppositories to facilitate the final phase of expulsion.
Educational guidance for study. It is NOT a prescription recommendation. The actual choice depends on the cause, the patient, and current guidelines.
- Area
- Gastrointestinal
- Listed causes
- 5
- Treatment options
- 4