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Dr. Todd Ponsky

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Fecal Incontinence Bowel Management: Pediatric Bowel Management 2013

Video Published 2019-01-11 Updated 2026-06-10

Timestops (8)

Topic Overview

A didactic session on distinguishing true fecal incontinence from pseudo-incontinence with overflow in pediatric patients, emphasizing that treatment differs fundamentally between the two groups. True fecal incontinence patients—those with congenital defects (myelomeningocele, absent sacrum, sacral ratio <0.4, presacral mass) or acquired damage (post-Hirschsprung complications, dehiscence after anorectal malformation repair)—require enema-based bowel management to artificially empty the colon. Pseudo-incontinence patients have intact bowel control but suffer from constipation and overflow soiling; they are treated with laxatives, not enemas. The session includes detailed instruction on enema prescription (saline base 200–1000 mL, irritants glycerin 10–30 mL, Castile soap 9–36 mL, fleet phosphate as last resort), a one-week trial-and-error titration protocol guided by daily abdominal X-rays, and case-based teaching on adjusting volume and concentration based on radiographic and clinical results.

Key Takeaways

  • True fecal incontinence requires enema-based management; pseudo-incontinence from constipation needs laxatives, not enemas. (3:37)
  • Contrast enema without prep stratifies patients: dilated colon needs large-volume enema; non-dilated needs small enema plus diet/loperamide. (33:36)
  • Daily abdominal X-ray during titration is essential; goal is clear left colon/rectum, as right-colon stool takes 23 hours to transit. (37:54)
  • Never combine laxatives and enemas in true fecal incontinence—laxatives cause unpredictable bowel movements after enema. (39:27)
  • Malone procedure should only follow proven enema efficacy; performing it without prior bowel management trial is incorrect. (50:53)

Inside this episode

Kai, the Library's AI content creator, listened to this episode and mapped who's speaking, the chapters, key claims, and cases. Every item links to the exact moment in the recording.

AI-enriched

Who's speaking

  • Speaker 1 — host
  • Speaker 2 — host
  • Speaker 3 — guest
  • Speaker 4 — guest
  • Speaker 5 — guest
  • Speaker 6 — guest

Chapters

  • 0:00True vs. Pseudo Fecal Incontinence: Definitions and Diagnostic Criteria — Differentiates true fecal incontinence (congenital: myelomeningocele, absent sacrum, sacral ratio <0.4, presacral mass, bladder-neck fistula; acquired: damaged anal canal post-Hirschsprung or anorectal malformation dehiscence) from pseudo-incontinence (constipation with overflow in patients with intact bowel control). Emphasizes that treatment is fundamentally different: enemas for true incontinence, laxatives for pseudo-incontinence.
  • 5:00Audience Case Exercises: Identifying True vs. Pseudo Incontinence — Interactive case presentations with audience polling. Cases include: 6-year-old with rectal bladder-neck fistula and sacral ratio 0.3 (true incontinence); 4-year-old with perineal fistula, sacral ratio 0.8, constipation (pseudo-incontinence); 3-year-old post-Hirschsprung with destroyed anal canal (true incontinence); 5-year-old with giant sacrococcygeal teratoma (true incontinence, though panelists note gray zones); 10-year-old with normal sacrum and constipation on contrast enema (pseudo-incontinence); 12-year-old with myelomeningocele (true incontinence, colon not dilated despite dysmotility).
  • 18:20Presacral Mass, Tethered Cord, and Curarino Triad: Management Controversies — Discussion of presacral mass resection (does not improve continence; indicated to prevent infection/malignancy), tethered cord release (controversial, no consensus on benefit for bowel control, practice varies by institution and country), and Curarino triad (sacral defect + anorectal malformation + presacral mass). Panelists report variable neurosurgical approaches; spk_2 expresses skepticism about scientific evidence for tethered cord surgery.
  • 29:10Enema-Based Bowel Management: Principles and Protocol — Core teaching on enema management for true fecal incontinence. Contrast enema without prep divides patients into dilated colon (slow-moving, needs large concentrated enema) vs. non-dilated colon (fast-moving, needs small enema plus constipating diet and loperamide). Enema components: saline 200–1000 mL, glycerin 10–30 mL, Castile soap 9–36 mL, fleet phosphate (last resort, risk of colitis). One-week trial-and-error protocol with daily X-rays to assess left colon and rectum clearance. Never combine enemas and laxatives in incontinent patients.
  • 45:30Interactive Enema Titration Cases — Step-by-step case exercises teaching enema adjustment. Cases demonstrate: increasing concentration when X-ray shows residual stool; slowing administration or warming solution for cramping/nausea; adding loperamide and constipating diet when colon is clean but accidents persist (hypermotility); recognizing short colon anatomy on contrast enema; interpreting daily X-rays for left colon and rectal clearance. Panelists debate volume vs. concentration adjustments, glycerin vs. soap tolerance, and use of tap water vs. saline.

Key claims

  • 0:22True fecal incontinence patients lack the ability to have bowel control, either congenital or acquired. — Speaker 1
  • 0:39Congenital true fecal incontinence includes myelomeningocele, large sacrococcygeal tumors, absent sacrum, and anorectal malformation with bad prognosis (bladder neck fistula, complex cloaca, sacral ratio <0.4, presacral mass, tethered cord). — Speaker 1
  • 2:24Acquired true fecal incontinence includes patients operated for Hirschsprung disease with damaged anal canal or anorectal malformation with good prognosis who had complications (dehiscence, reoperation) changing prognosis to bad. — Speaker 1
  • 3:37Treatment for true fecal incontinence is enema—an artificial way to clean the colon and avoid bowel movements for 24 hours. — Speaker 1
  • 3:49Pseudo fecal incontinence patients have the ability to have bowel control but suffer from constipation. — Speaker 1
  • 4:01Pseudo fecal incontinence includes anorectal malformation with good prognosis and good operation, severe idiopathic constipation, and some Hirschsprung patients with good operation and intact anal canal. — Speaker 1
  • 4:23Pseudo fecal incontinence is treated by addressing constipation with laxatives; once adequate laxative dose is achieved, patients empty daily and are clean. — Speaker 1
  • 5:20Sacral ratio less than 0.4 indicates true fecal incontinence. — Speaker 1
  • 7:39Removal of presacral mass does not improve continence because continence is related to sacral nerve damage, not the mass itself. — Speaker 1
  • 8:55Presacral mass must be resected to prevent infection (severe meningitis) and because some masses are malignant; MRI is needed to check for dural connection requiring neurosurgeon involvement. — Speaker 3
  • 9:57Tethered cord release does not improve bowel control; practice varies by institution and country, with no scientific consensus. — Speaker 1
  • 11:03Some neurosurgeons believe tethered cord release may help bladder function more than anorectal function. — Speaker 5
  • 12:47Tethered cord is a controversial issue with no scientific approach; some patients with tethered cord are never operated and have normal bowel and urinary control. — Speaker 3
  • 33:36Contrast enema without bowel prep divides fecal incontinence patients into two groups: dilated colon (slow-moving) and non-dilated colon (fast-moving, hypermotile). — Speaker 1
  • 34:23Dilated colon patients need large volume, concentrated enema; once cleaned, the colon stays quiet for 23 hours. — Speaker 1
  • 34:55Non-dilated colon patients need small saline enema plus constipating diet, limited snacks (3 meals/day to avoid gastrocolic reflex), loperamide, and fiber to keep colon quiet. — Speaker 1
  • 35:57Enema base is saline solution 200–1000 mL; irritants are liquid glycerin 10–30 mL, Castile soap 9–36 mL, and fleet phosphate (last resort due to colitis risk). — Speaker 1
  • 36:30Fleet enema is last resort because long-term use can cause narrow spastic colon (inflammatory reaction); dose must be respected to avoid electrolyte disturbances. — Speaker 1
  • 37:04Fleet dosing: 3–4 years half pediatric fleet (33 mL), 4–10 years one pediatric fleet (66 mL), >10 years adult fleet (133 mL). — Speaker 1
  • 37:28Enema titration is a one-week trial-and-error program; no weight/height formula exists; each child's colon behaves differently. — Speaker 1
  • 37:54Daily abdominal X-ray is the only way to know if the enema is working; goal is clear left colon and rectum (stool in right colon will take 23 hours to reach rectum). — Speaker 1
  • 39:27Never give laxatives and enemas simultaneously in fecal incontinence patients; laxatives cause unpredictable bowel movements after enema, worsening incontinence. — Speaker 1
  • 41:24If enema takes >1 hour to produce bowel movement, increase concentration (enema not irritant enough). — Speaker 1
  • 41:59If patient has pain, nausea, vomiting during enema with clean X-ray, decrease concentration; if X-ray not clean, slow administration and warm solution to body temperature. — Speaker 1
  • 43:46If colon is completely clean but patient has accidents, colon is moving too fast; add loperamide and constipating diet. — Speaker 1
  • 44:20Bowel management through stoma is an option for cloacal exstrophy patients; if successful (empty bag 23 hours), pull-through can be offered; some patients prefer to continue stoma management. — Speaker 1
  • 45:06Bowel management is a matter of quality of life determined by the patient, not the doctor. — Speaker 1
  • 47:20Initial enema volume can be estimated by asking radiologist how much volume was needed to reach splenic flexure during contrast enema. — Speaker 1
  • 48:04Typical enema volumes range from 200–250 mL in small children to 1–1.5 L in large patients with huge colon. — Speaker 3
  • 48:29Glycerin dosing: start 10 mL, maximum 40 mL; Castile soap: start 9 mL, maximum 27–36 mL. — Speaker 3
  • 50:53Malone procedure should only be offered after demonstrating that enema works; doing Malone without prior bowel management trial is incorrect. — Speaker 3
  • 61:51Tap water enema risks water absorption by colon (colon's function is to absorb water) and electrolyte disturbances; saline solution is preferred. — Speaker 1
  • 62:13Saline solution alone often does not produce bowel movement; irritants (glycerin, soap) are needed to provoke colonic contraction. — Speaker 1
  • 62:40For fecal impaction, disimpaction uses 3 enemas/day with maximum concentration, not saline only. — Speaker 1
  • 63:20When evaluating enema X-rays, focus on left colon and rectum; stool in transverse/right colon takes 24 hours to reach rectum. — Speaker 6
  • 20:23Myelomeningocele patients typically do not have dilated colon even with severe dysmotility and fecal incontinence; colon may be redundant but not dilated. — Speaker 4
  • 30:44Achalasia of anal sphincter is a manometric concept (lack of internal sphincter relaxation); internal sphincter is a functional, not anatomic, structure. — Speaker 3
  • 22:34Neuronal intestinal dysplasia (NID) lacks topographic studies defining which bowel segment is abnormal; no standard treatment exists; diagnosis is controversial. — Speaker 3
  • 27:47Duhamel pouch patients with giant pouch and staple line visible on contrast enema typically suffer from constipation, treated with laxatives. — Speaker 1
  • 25:26For severe idiopathic constipation with megarectum, 85% respond to laxative protocol; 15% non-responders may be offered sigmoid resection as last resort with variable results (50% improve). — Speaker 1

Points of disagreement

  • 67:32Initial enema volume for 10-year-old with slow colon
    • Speaker 5: 400 mL is too little for a 10-year-old; would use higher volume (implied 700 mL based on earlier comment)
    • Speaker 4: Colon is hypomotile but not very dilated, so large volume not necessary
    • Speaker 1: Start with 400 mL; can adjust next day based on X-ray
  • 61:13Use of tap water vs. saline for enemas
    • Speaker 4: Prefers tap water initially to clean fecal retention before adding irritants
    • Speaker 1: Does not use tap water due to risk of water absorption and electrolyte disturbances; uses saline solution
  • 9:57Tethered cord release for bowel control
    • Speaker 1: Does not improve bowel control; neurosurgeons in US release if detected
    • Speaker 4: Does not operate until symptoms appear; agrees no benefit for continence
    • Speaker 5: Neurosurgeons at his institution are aggressive; may help bladder more than bowel
    • Speaker 3: Very skeptical; no scientific approach; has seen patients with tethered cord never operated who are continent

Open questions

  • Does tethered cord release improve bowel or bladder control in anorectal malformation patients?
  • What is the optimal approach to neuronal intestinal dysplasia (NID)—does it exist as a distinct entity requiring specific treatment?
  • What predicts success of sigmoid resection in severe idiopathic constipation non-responders to laxatives?
  • Should Malone antegrade continence enema be offered to all fecal incontinence patients, or only after demonstrating rectal enema efficacy?
This episode was analyzed and enriched by Kai, the Library's AI content creator. Every item links to the moment it comes from — click a timestamp to listen in context.

Tap Water vs. Saline: Competing Approaches to Initial Enema Disimpaction

The points where the speakers disagreed, with each position presented side by side. Written by Kai from the episode transcript and reviewed before publishing.

For trainees · Points of disagreement · AI-written, human-reviewed

The Clinical Question

When a child with fecal incontinence presents with chronic fecal retention, should the initial disimpaction phase use tap water enemas to clear the impaction before introducing irritants, or should saline-based enemas with irritants be used from the outset? 61:13 61:51

The Tap Water Approach

One discussant advocates beginning with tap water alone when significant fecal retention is present 61:13. The rationale rests on a concern about colitis: chronic fecal retention often produces inflammatory changes in the colonic mucosa, and introducing irritants like glycerin, soap, or phosphate into an already inflamed colon may provoke accidents during treatment rather than establishing control 61:13. Under this framework, the first priority is mechanical clearance of the impaction using multiple tap water enemas daily—two or three per day for several days—before attempting to establish a maintenance regimen with irritants 61:13.

This approach treats disimpaction as a distinct phase requiring gentler intervention 61:13. The assumption is that tap water provides sufficient volume and mechanical effect to dislodge retained stool without the additional mucosal irritation that concentrated enemas produce 61:13. Once the colon is cleared and any inflammatory response has settled, irritants can be introduced to establish the daily bowel management routine 61:13.

The Saline-Plus-Irritant Approach

Another discussant rejects tap water entirely, using saline solution as the enema base in all circumstances, including disimpaction 61:51. Two concerns drive this position 61:51 62:13. First, the colon's primary function is water absorption; administering tap water risks the colon absorbing that water, potentially causing electrolyte disturbances—a risk documented in the literature 61:51. Second, saline solution alone frequently fails to produce a bowel movement; many patients retain the saline without evacuating 62:13. The colon requires irritation to contract and expel contents, which is why glycerin or soap must be added even during the disimpaction phase 62:13.

For disimpaction under this protocol, the approach is not gentler but more aggressive: three enemas daily at maximum concentration 62:40. The goal is rapid clearance using the same irritants that will later maintain continence, not a graduated introduction 62:40. The logic holds that if irritants are necessary for effective evacuation, delaying their use prolongs the impaction and the patient's discomfort 62:13 62:40. Saline provides the vehicle; irritants provide the therapeutic effect 61:51 62:13.

Where They Converge

Both approaches agree that disimpaction requires multiple enemas daily rather than a single attempt 61:13 62:40. Both recognize that chronic fecal retention represents a distinct management challenge requiring more intensive intervention than maintenance bowel management 61:13 62:40. Neither disputes that irritants will eventually be necessary for the ongoing enema regimen—the disagreement concerns only the initial clearance phase 61:13 61:51 62:13.

Both also acknowledge that the colon's response to enemas varies by patient, requiring individualized titration 37:28. The one-week trial-and-error protocol applies regardless of which initial approach is chosen 37:28. Daily abdominal X-rays remain the standard for assessing whether the regimen is working 37:54.

What Would Resolve It

Neither discussant cited comparative data on disimpaction protocols in this population. The question would be settled by a study comparing time to complete clearance, incidence of accidents during the disimpaction phase, electrolyte disturbances, and patient-reported tolerability between tap water and saline-plus-irritant protocols 61:13 61:51 62:13. Such a study would need to control for the degree of baseline impaction and the presence of mucosal inflammation 61:13.

Until such evidence exists, the choice reflects different weightings of risk: one prioritizes avoiding mucosal irritation during an inflammatory state, the other prioritizes avoiding water absorption and ensuring effective evacuation from the first intervention 61:13 61:51 62:13. Both positions rest on physiologic reasoning rather than demonstrated outcomes in this specific clinical scenario 61:13 61:51 62:13.

Takeaways from this story

  • Tap water enemas risk colonic absorption and electrolyte disturbances; saline solution is preferred as the base.
  • Saline alone often fails to produce evacuation; irritants like glycerin are needed to provoke colonic contraction.
  • For fecal impaction, disimpaction uses three enemas daily at maximum concentration, not saline only.
  • Enema titration requires one week of trial and error with daily X-rays; no weight-based formula exists.

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