עיכול ד Hirschsprung Disease (HD) & Anorectal Malformations (ARM)

Congenital anorectal malformations, embryological development, imperforate anus, VACTERL association, obstruction and fistulas, diagnostic imaging, initial nursing management, surgical prognosis, postoperative complications, anal dilatation, colostomy care and parental education.

Hirschsprung Disease – Incidence

𝗜𝗻𝗰𝗶𝗱𝗲𝗻𝗰𝗲: Approximately 1 in 5,000 live births. 𝗦𝗲𝘅: About 4 times more common in boys than girls. 𝗘𝘅𝘁𝗲𝗻𝘁: Around 80% of cases are short-segment disease, usually involving the rectum and distal sigmoid colon. 𝗙𝗮𝗺𝗶𝗹𝘆 𝗵𝗶𝘀𝘁𝗼𝗿𝘆: A genetic component means a family history can increase suspicion.

Normal Bowel Function – Peristalsis, Enteric Plexuses and RAIR

𝗣𝗲𝗿𝗶𝘀𝘁𝗮𝗹𝘀𝗶𝘀: Coordinated intestinal contractions propel stool through the colon toward the rectum. 𝗔𝘂𝗲𝗿𝗯𝗮𝗰𝗵’𝘀 𝗺𝘆𝗲𝗻𝘁𝗲𝗿𝗶𝗰 𝗽𝗹𝗲𝘅𝘂𝘀: Located between intestinal muscle layers; controls motility and coordinated peristalsis. 𝗠𝗲𝗶𝘀𝘀𝗻𝗲𝗿’𝘀 𝘀𝘂𝗯𝗺𝘂𝗰𝗼𝘀𝗮𝗹 𝗽𝗹𝗲𝘅𝘂𝘀: Located in the submucosa; regulates intestinal secretion, absorption and local blood flow. 𝗥𝗔𝗜𝗥: Rectoanal inhibitory reflex: rectal distention by stool automatically relaxes the internal anal sphincter, allowing stool to pass.

Hirschsprung Disease – Definition and Pathophysiology

𝗗𝗲𝗳𝗶𝗻𝗶𝘁𝗶𝗼𝗻: Congenital functional intestinal obstruction caused by aganglionosis: absence of enteric ganglion cells in a segment of bowel. 𝗖𝗮𝘂𝘀𝗲: Incomplete migration of neural crest cells during fetal development. 𝗔𝗳𝗳𝗲𝗰𝘁𝗲𝗱 𝗻𝗲𝘁𝘄𝗼𝗿𝗸𝘀: Ganglion cells are absent from Auerbach’s myenteric plexus and Meissner’s submucosal plexus in the affected segment. 𝗘𝗳𝗳𝗲𝗰𝘁: No coordinated peristalsis or normal relaxation in the affected segment → bowel remains contracted and stool cannot move forward. 𝗦𝗽𝗵𝗶𝗻𝗰𝘁𝗲𝗿 𝗮𝗻𝗱 𝗿𝗲𝗳𝗹𝗲𝘅: The internal anal sphincter has increased tone, remains contracted and fails to relax; the rectoanal inhibitory reflex (RAIR) is absent → functional obstruction despite an anatomically present passage.

Hirschsprung Disease – Megacolon and Affected Bowel

𝗖𝗼𝗺𝗺𝗼𝗻 𝘀𝗶𝘁𝗲𝘀: The rectum and distal sigmoid colon are most often affected; aganglionosis can extend farther through the colon and rarely into the small intestine. 𝗗𝗶𝘀𝘁𝗮𝗹 𝗯𝗼𝘄𝗲𝗹: The aganglionic segment stays narrow and contracted because it cannot relax or propel stool. 𝗣𝗿𝗼𝘅𝗶𝗺𝗮𝗹 𝗯𝗼𝘄𝗲𝗹: Stool and gas build up ABOVE the obstruction; the normally innervated upstream colon progressively dilates. 𝗠𝗲𝗴𝗮𝗰𝗼𝗹𝗼𝗻: Marked dilation of the proximal colon resulting from ongoing fecal retention and increased pressure.

Hirschsprung Disease – Signs and Symptoms

𝗡𝗲𝘄𝗯𝗼𝗿𝗻 𝗽𝗿𝗲𝘀𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻: Delayed passage of meconium, progressive abdominal distention (swollen/tense abdomen), poor feeding or feeding intolerance, and severe constipation. 𝗩𝗼𝗺𝗶𝘁𝗶𝗻𝗴: Bilious (GREEN) vomiting is a warning sign of lower intestinal obstruction and requires urgent assessment; it is not specific to Hirschsprung disease. 𝗠𝗲𝗰𝗵𝗮𝗻𝗶𝘀𝗺: Stool and gas cannot pass through the contracted distal segment → accumulation, abdominal swelling and vomiting. 𝗜𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁: Presentation varies with the length of affected bowel and age at recognition.

Hirschsprung Disease – Meconium Passage

𝗡𝗼𝗿𝗺𝗮𝗹: Meconium is the newborn’s first stool; most healthy term newborns pass it within 24 hours and almost all within 48 hours. 𝗛𝗗 𝘄𝗮𝗿𝗻𝗶𝗻𝗴 𝘀𝗶𝗴𝗻: Delayed or absent meconium passage, especially NO passage by 48 hours, requires investigation for obstruction, including Hirschsprung disease. 𝗖𝗮𝘂𝘁𝗶𝗼𝗻: A newborn may still pass meconium initially and have Hirschsprung disease; passage does not exclude the diagnosis. 𝗘𝘅𝗮𝗺 𝗱𝗶𝘀𝘁𝗶𝗻𝗰𝘁𝗶𝗼𝗻: The supplied past exams give both “within 24 hours” and “24–48 hours”; the key clinical alert is failure by 48 hours.

Hirschsprung Disease – Presentation in Older Children

𝗪𝗵𝘆 𝗱𝗶𝗮𝗴𝗻𝗼𝘀𝗲𝗱 𝗹𝗮𝘁𝗲𝗿: Milder or short-segment disease may not be recognized in the newborn period. 𝗕𝗼𝘄𝗲𝗹 𝘀𝘆𝗺𝗽𝘁𝗼𝗺𝘀: Chronic severe constipation beginning in infancy, abdominal enlargement, narrow ribbon-like stools and very foul-smelling stools. 𝗢𝘁𝗵𝗲𝗿 𝗳𝗶𝗻𝗱𝗶𝗻𝗴𝘀: Poor appetite, inadequate weight gain or poor growth. 𝗗𝗶𝗮𝗿𝗿𝗵𝗲𝗮: Intermittent or alternating diarrhea can result from liquid stool passing around retained feces or from enterocolitis. 𝗡𝘂𝗿𝘀𝗶𝗻𝗴 𝗰𝗹𝘂𝗲: Persistent constipation WITH abdominal distention should not automatically be assumed to be functional constipation.

Hirschsprung Disease – Diagnostic Tools Overview

𝗛𝗶𝘀𝘁𝗼𝗿𝘆 𝗮𝗻𝗱 𝗲𝘅𝗮𝗺𝗶𝗻𝗮𝘁𝗶𝗼𝗻: Ask about delayed meconium, chronic constipation, abdominal distention and vomiting; examination may find an empty rectum and increased internal sphincter tone. 𝗖𝗼𝗻𝘁𝗿𝗮𝘀𝘁 𝗲𝗻𝗲𝗺𝗮: May show a transition zone: narrow distal aganglionic bowel → dilated proximal bowel; not definitive and may be less obvious in newborns. 𝗔𝗻𝗼𝗿𝗲𝗰𝘁𝗮𝗹 𝗺𝗮𝗻𝗼𝗺𝗲𝘁𝗿𝘆: Checks whether rectal distention triggers the rectoanal inhibitory reflex (RAIR); RAIR is absent in HD. 𝗥𝗲𝗰𝘁𝗮𝗹 𝗯𝗶𝗼𝗽𝘀𝘆: GOLD STANDARD: histology demonstrates absence of ganglion cells. 𝗥𝗲𝗰𝘁𝗮𝗹 𝗲𝘅𝗮𝗺𝗶𝗻𝗮𝘁𝗶𝗼𝗻: Explosive release of stool or gas may occur after a rectal exam; this finding alone does not confirm or exclude HD.

Hirschsprung Disease – Anorectal Manometry

𝗣𝗿𝗼𝗰𝗲𝗱𝘂𝗿𝗲: A catheter with a small balloon is inserted into the rectum and inflated to simulate rectal filling. 𝗡𝗼𝗿𝗺𝗮𝗹 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗲: Rectal distention activates RAIR → the internal anal sphincter relaxes. 𝗛𝗗 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗲: RAIR is absent → internal anal sphincter fails to relax despite balloon distention. 𝗥𝗼𝗹𝗲: Supports suspicion of Hirschsprung disease but DOES NOT replace a confirmatory rectal biopsy.

Hirschsprung Disease – Rectal Biopsy (Gold Standard)

𝗧𝗲𝘀𝘁: A rectal biopsy, often obtained by suction biopsy, provides tissue for histological examination. 𝗗𝗶𝗮𝗴𝗻𝗼𝘀𝘁𝗶𝗰 𝗳𝗶𝗻𝗱𝗶𝗻𝗴: Absence of ganglion cells (aganglionosis) in the sampled rectal bowel wall. 𝗦𝗶𝗴𝗻𝗶𝗳𝗶𝗰𝗮𝗻𝗰𝗲: The GOLD STANDARD and definitive confirmation of Hirschsprung disease; distinguishes it from other causes of neonatal obstruction or constipation. 𝗘𝘅𝗮𝗺 𝗽𝗼𝗶𝗻𝘁: Hirschsprung disease → diagnostic test: RECTAL BIOPSY.

Hirschsprung Disease – Preoperative Nursing Care

𝗣𝗿𝗶𝗼𝗿𝗶𝘁𝘆: Stabilize the child, relieve obstruction and prevent dehydration, electrolyte imbalance, infection and perforation. 𝗔𝘀𝘀𝗲𝘀𝘀 𝗮𝗻𝗱 𝗺𝗼𝗻𝗶𝘁𝗼𝗿: Vital signs, abdominal distention, vomiting, feeding tolerance, stool output, intake/output, hydration and electrolytes. 𝗙𝗹𝘂𝗶𝗱𝘀 𝗮𝗻𝗱 𝗻𝘂𝘁𝗿𝗶𝘁𝗶𝗼𝗻: Give prescribed IV fluids; keep NPO if clinically indicated by obstruction. When oral intake is appropriate, ensure adequate protein and calories; a low-fiber diet may be prescribed. 𝗕𝗼𝘄𝗲𝗹 𝗰𝗮𝗿𝗲: Prescribed rectal saline irrigations may decompress the bowel and remove stool/gas; only trained staff should perform them. Older children may need bowel preparation per surgical protocol. 𝗜𝗻𝗳𝗲𝗰𝘁𝗶𝗼𝗻 𝗽𝗿𝗲𝘃𝗲𝗻𝘁𝗶𝗼𝗻: Administer antibiotics when prescribed for infection or perioperative preparation; they are not universally routine for all newborns.

Hirschsprung-Associated Enterocolitis (HAEC) – Definition and Danger

𝗗𝗲𝗳𝗶𝗻𝗶𝘁𝗶𝗼𝗻: A potentially life-threatening intestinal inflammatory complication of Hirschsprung disease, possible BEFORE or AFTER surgery. 𝗠𝗲𝗰𝗵𝗮𝗻𝗶𝘀𝗺: Poor motility and functional obstruction → fecal stasis → bacterial overgrowth → mucosal injury and severe intestinal inflammation. 𝗪𝗵𝘆 𝗱𝗮𝗻𝗴𝗲𝗿𝗼𝘂𝘀: Can rapidly progress to bowel-wall perforation, sepsis and shock; it is among the most dangerous complications of HD. 𝗡𝘂𝗿𝘀𝗶𝗻𝗴 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝗰𝗲: New diarrhea, distention or systemic illness in a child with HD is an urgent warning, not simply routine constipation.

Hirschsprung-Associated Enterocolitis (HAEC) – Signs and Symptoms

𝗔𝗯𝗱𝗼𝗺𝗶𝗻𝗮𝗹/𝗚𝗜: Rapidly increasing abdominal distention, severe tenderness, explosive or very foul-smelling diarrhea, vomiting and poor feeding. 𝗦𝘆𝘀𝘁𝗲𝗺𝗶𝗰: High fever or temperature instability, lethargy, extreme irritability and deterioration in general appearance. 𝗦𝗲𝘃𝗲𝗿𝗲 𝘀𝗶𝗴𝗻𝘀: Respiratory distress, cyanosis and signs of poor circulation can indicate life-threatening deterioration. 𝗧𝗶𝗺𝗶𝗻𝗴: Watch for HAEC both before and after pull-through surgery.

Hirschsprung-Associated Enterocolitis (HAEC) – Nursing Management and Treatment

𝗜𝗺𝗺𝗲𝗱𝗶𝗮𝘁𝗲 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗲: Urgently alert the medical/surgical team and prepare for emergency treatment. 𝗠𝗼𝗻𝗶𝘁𝗼𝗿𝗶𝗻𝗴: Frequent or continuous vital signs (blood pressure, heart rate, temperature and respiration), perfusion, hydration, urine output and changes in abdominal findings. 𝗧𝗿𝗲𝗮𝘁𝗺𝗲𝗻𝘁 𝗽𝗿𝗲𝗽𝗮𝗿𝗮𝘁𝗶𝗼𝗻: NPO if ordered, IV fluids and electrolyte correction, prescribed IV antibiotics, and prescribed bowel decompression/rectal irrigations performed by trained staff. 𝗪𝗮𝘁𝗰𝗵 𝗳𝗼𝗿: Sepsis, shock and intestinal perforation; escalate any rapid deterioration. 𝗙𝗮𝗺𝗶𝗹𝘆 𝘁𝗲𝗮𝗰𝗵𝗶𝗻𝗴: HAEC can recur after surgery; parents must recognize warning signs and seek urgent care.

Hirschsprung Disease – Complications and Skip Segments

𝗕𝗲𝗳𝗼𝗿𝗲 𝘀𝘂𝗿𝗴𝗲𝗿𝘆: Persistent bowel obstruction, severe constipation, megacolon, feeding problems, enterocolitis and possible bowel perforation. 𝗔𝗳𝘁𝗲𝗿 𝘀𝘂𝗿𝗴𝗲𝗿𝘆: Ongoing constipation, altered stool frequency, anal/anastomotic narrowing (stricture), fecal incontinence and enterocolitis; long-term follow-up may be needed. 𝗦𝗸𝗶𝗽 𝘀𝗲𝗴𝗺𝗲𝗻𝘁𝘀: Rare discontinuous patterns of abnormal innervation (“skip areas”) complicate identification of truly healthy bowel for surgery. 𝗧𝗶𝗺𝗶𝗻𝗴 𝗰𝗹𝗮𝗿𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻: Skip areas are congenital anatomical/innervation patterns; they may be identified before, during or after surgery, but are not caused by surgery.

Hirschsprung Disease – Pull-Through Surgery

𝗣𝘂𝗿𝗽𝗼𝘀𝗲: Definitive surgical correction of the functional intestinal obstruction. 𝗣𝗿𝗼𝗰𝗲𝗱𝘂𝗿𝗲: Remove the aganglionic diseased bowel and pull the normally innervated bowel down to connect it to the anus (anastomosis). 𝗜𝗻𝘁𝗿𝗮𝗼𝗽𝗲𝗿𝗮𝘁𝗶𝘃𝗲 𝗰𝗵𝗲𝗰𝗸: Tissue samples may identify the level of functioning ganglion cells and guide the length of bowel removed. 𝗢𝘂𝘁𝗰𝗼𝗺𝗲𝘀: Many children achieve good sphincter control; postoperative bowel dysfunction, constipation or narrowing can still require follow-up.

Hirschsprung Disease – Temporary Ostomy

𝗪𝗵𝗲𝗻 𝗻𝗲𝗲𝗱𝗲𝗱: May be required for severe illness, active enterocolitis, extensive disease or other complications when immediate definitive reconstruction is not appropriate. 𝗪𝗵𝗮𝘁 𝗶𝘁 𝗱𝗼𝗲𝘀: Temporarily diverts stool through a surgically created opening (stoma) in the abdominal wall, bypassing the obstructed bowel. 𝗡𝗲𝘅𝘁 𝘀𝘁𝗲𝗽: Once stable and ready, the child may undergo definitive pull-through reconstruction and later closure of the temporary stoma, as planned by the surgeon. 𝗡𝘂𝗿𝘀𝗶𝗻𝗴 𝗰𝗮𝗿𝗲: Observe stoma output and appearance, protect surrounding skin, and teach caregivers ostomy care if discharged with a stoma.

Hirschsprung Disease – Parent Education and Home Management

𝗕𝗼𝘄𝗲𝗹 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Teach expected stool patterns, adequate hydration, prescribed stool softeners and rectal saline irrigations ONLY if ordered and taught by the surgical team. 𝗡𝘂𝘁𝗿𝗶𝘁𝗶𝗼𝗻/𝗴𝗿𝗼𝘄𝘁𝗵: Follow the postoperative diet plan; ensure adequate calories and protein, introduce fiber gradually as tolerated, and monitor weight and growth (FTT risk). 𝗙𝗼𝗹𝗹𝗼𝘄-𝘂𝗽: Keep surgical reviews for persistent constipation, altered stooling or possible anal narrowing; prescribed dilatations may occasionally be required. 𝗨𝗿𝗴𝗲𝗻𝘁 𝘄𝗮𝗿𝗻𝗶𝗻𝗴 𝘀𝗶𝗴𝗻𝘀: Fever, new or worsening abdominal distention, explosive/foul diarrhea, vomiting, reduced appetite or lethargy → seek IMMEDIATE assessment for HAEC, even after successful surgery

Anorectal Malformations (ARM) – Definition, Pathophysiology and Incidence

𝗗𝗲𝗳𝗶𝗻𝗶𝘁𝗶𝗼𝗻: Congenital structural defects involving abnormal development or connection of the anus and/or rectum, including imperforate anus. Unlike Hirschsprung disease, ARM is primarily an anatomical rather than neurological obstruction. 𝗘𝗺𝗯𝗿𝘆𝗼𝗹𝗼𝗴𝘆: Develops during early fetal development, around weeks 6–7, when digestive, urinary and reproductive structures are separating; disruption of caudal folding and anorectal formation can produce ARM. 𝗣𝗼𝘀𝘀𝗶𝗯𝗹𝗲 𝗱𝗲𝗳𝗲𝗰𝘁𝘀: The anal opening may be absent, narrowed or abnormally positioned, or the rectum may connect to another organ through a congenital fistula. 𝗜𝗻𝗰𝗶𝗱𝗲𝗻𝗰𝗲: Approximately 1 in 3,000 births, according to the course notes.

ARM – Newborn Assessment of the Perineum

𝗜𝗻𝘀𝗽𝗲𝗰𝘁: Check whether an anal opening exists in the normal position; assess the shape of the perineum, buttock symmetry and apparent development of the anal sphincter muscle complex. 𝗦𝘂𝘀𝗽𝗶𝗰𝗶𝗼𝘂𝘀 𝘀𝗶𝗴𝗻𝘀: Flat perineum, absent or abnormally located anal opening, or abnormal stool passage. 𝗟𝗶𝗺𝗶𝘁𝗮𝘁𝗶𝗼𝗻𝘀: External appearance does not reveal the full location of the rectum, pelvic muscles or possible fistulas. Further imaging and anatomical assessment are required. 𝗡𝘂𝗿𝘀𝗶𝗻𝗴 𝗽𝗿𝗶𝗼𝗿𝗶𝘁𝘆: Observe and document the actual site of stool passage and urinary output; avoid unprescribed rectal instrumentation.

ARM – VACTERL Association

𝗠𝗲𝗮𝗻𝗶𝗻𝗴: VACTERL is a pattern of congenital abnormalities that may occur together; not every affected newborn has every component. 𝗩: Vertebral anomalies – spine abnormalities. 𝗔: Anal anomalies – imperforate anus or other ARM. 𝗖: Cardiac anomalies – congenital heart defects. 𝗧𝗘: Tracheoesophageal fistula and/or esophageal atresia. 𝗥: Renal anomalies – kidney or urinary tract abnormalities. 𝗟: Limb anomalies – abnormalities of the arms or legs. 𝗖𝗹𝗶𝗻𝗶𝗰𝗮𝗹 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝗰𝗲: ARM may accompany other birth defects. Esophageal atresia or vertebral abnormalities should prompt anal assessment, and ARM should prompt screening of the heart, kidneys, spine and relevant other systems before surgery, because associated defects affect anesthesia and planning.

Past Exam – 2026 Aleph Pisgah, Q32 – What does VACTERL mean in the context of tracheoesophageal fistula/esophageal atresia?

A group of associated anomalies that may occur together, including vertebral, anal, cardiac, tracheal, esophageal, renal, and limb abnormalities

Past Exam – 2022 Aleph, Q7 – Which anomalies can accompany a child born with esophageal atresia?

Kidney abnormalities and anal atresia

ARM – Complete Obstruction: Clinical Presentation

𝗠𝗲𝗰𝗵𝗮𝗻𝗶𝘀𝗺: The distal rectum or anus has no effective outlet, so meconium and stool cannot exit normally. 𝗦𝗶𝗴𝗻𝘀: No meconium passage, increasing abdominal distention, feeding intolerance and eventually vomiting; the infant may develop signs of intestinal obstruction. 𝗗𝗮𝗻𝗴𝗲𝗿: Progressive distention may lead to inflammation, bowel perforation or infection. 𝗔𝗰𝘁𝗶𝗼𝗻: Requires urgent assessment by neonatal and pediatric surgical teams and stabilization while treatment is planned.

ARM – Congenital Fistula: Clinical Presentation

𝗗𝗲𝗳𝗶𝗻𝗶𝘁𝗶𝗼𝗻: An abnormal tract formed during fetal development connecting the rectum to another structure; stool may leave by an abnormal route despite an absent normal anal opening. 𝗕𝗼𝘆𝘀: Rectourethral or rectovesical fistula may connect the rectum to the urethra or bladder, causing meconium or stool in the urine. 𝗚𝗶𝗿𝗹𝘀: Rectovestibular or other fistulas may allow stool to emerge in the vestibule, vagina or perineum, sometimes near the vaginal opening. 𝗔𝘀𝘀𝗲𝘀𝘀𝗺𝗲𝗻𝘁: Document exactly where meconium/stool appears, observe urine, inspect the perineum and report abnormal passage promptly. 𝗘𝘅𝗮𝗺 𝗱𝗶𝘀𝘁𝗶𝗻𝗰𝘁𝗶𝗼𝗻: Stool visible in the diaper or perineal area does NOT prove that the anus is normally formed.

Atresia – Definition and Relationship to ARM

𝗗𝗲𝗳𝗶𝗻𝗶𝘁𝗶𝗼𝗻: Atresia means that a normal body opening or tubular passage is congenitally absent or closed, producing a blocked or missing lumen. 𝗔𝗥𝗠 𝗲𝘅𝗮𝗺𝗽𝗹𝗲: Anal atresia or imperforate anus can leave no normal anal outlet for stool. 𝗗𝗶𝘀𝘁𝗶𝗻𝗴𝘂𝗶𝘀𝗵: Stenosis means an abnormally narrowed opening; fistula means an abnormal connection between structures; atresia means the normal passage is closed or absent. 𝗖𝗹𝗶𝗻𝗶𝗰𝗮𝗹 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝗰𝗲: A completely obstructed newborn requires prompt surgical assessment; urgency depends on the specific anatomy and clinical stability.

ARM – High versus Low Malformations

𝗟𝗼𝘄 𝗺𝗮𝗹𝗳𝗼𝗿𝗺𝗮𝘁𝗶𝗼𝗻: The rectal pouch ends closer to the perineal skin and sphincter muscle complex; reconstruction is often more straightforward and continence prognosis is generally better. 𝗛𝗶𝗴𝗵 𝗺𝗮𝗹𝗳𝗼𝗿𝗺𝗮𝘁𝗶𝗼𝗻: The rectal pouch is farther from the intended anal opening; may involve complex pelvic anatomy, fistulas and less developed pelvic/sphincter muscles. 𝗪𝗵𝘆 𝗱𝗶𝘀𝘁𝗶𝗻𝗰𝘁𝗶𝗼𝗻 𝗺𝗮𝘁𝘁𝗲𝗿𝘀: The level and anatomy help determine surgery and prognosis: early one-stage reconstruction may be possible for some; others need staged surgery and possibly an initial colostomy. 𝗛𝗼𝘄 𝗮𝘀𝘀𝗲𝘀𝘀𝗲𝗱: Imaging helps locate the rectal pouch and assess its distance from the perineum.

ARM – Diagnostic Imaging and Associated-Anomaly Screening

𝗔𝗶𝗺: Locate the distal rectal pouch, measure its distance from the perineal skin, classify high versus low defects and identify fistulas or associated anomalies. 𝗜𝗻𝘃𝗲𝗿𝘁𝗼𝗴𝗿𝗮𝗺: Traditional head-down X-ray allowed gas to outline the distal rectal pouch to estimate the level of obstruction; modern assessment more often uses appropriately positioned lateral radiographs and ultrasound. 𝗨𝗹𝘁𝗿𝗮𝘀𝗼𝘂𝗻𝗱: Assesses pelvic/anorectal anatomy where feasible and screens the kidneys, urinary tract and sacral region for associated abnormalities. 𝗢𝘁𝗵𝗲𝗿 𝘁𝗲𝘀𝘁𝘀: Echocardiography assesses cardiac defects; chest X-ray and other investigations assess thoracic or associated anomalies when indicated. 𝗪𝗵𝘆 𝗲𝘀𝘀𝗲𝗻𝘁𝗶𝗮𝗹: VACTERL-associated problems can change anesthetic risk and surgical planning.

ARM – Initial Stabilization and Preoperative Nursing Care

𝗣𝗿𝗶𝗼𝗿𝗶𝘁𝘆: Prevent deterioration from bowel obstruction and stabilize the newborn before surgery. 𝗡𝗣𝗢: Stop oral feeding when obstruction is suspected to avoid increasing intestinal distention and vomiting. 𝗜𝗩 𝗳𝗹𝘂𝗶𝗱𝘀: Maintain hydration and correct electrolyte disturbances as prescribed. 𝗡𝗚𝗧: Insert nasogastric tube when ordered for gastric decompression to reduce vomiting and aspiration risk. 𝗠𝗼𝗻𝗶𝘁𝗼𝗿: Vital signs, respiratory/cardiovascular condition, abdominal circumference, vomiting, urine output, stool passage, hydration and signs of perforation or infection. 𝗣𝗿𝗲𝗼𝗽𝗲𝗿𝗮𝘁𝗶𝘃𝗲 𝗲𝘃𝗮𝗹𝘂𝗮𝘁𝗶𝗼𝗻: Screen for major associated anomalies, particularly cardiac, renal and spinal defects; plan surgery according to defect severity and clinical stability.

ARM – Nursing Safety: No Rectal Temperature or Unprescribed Instrumentation

𝗥𝘂𝗹𝗲: Do not insert a rectal thermometer or other instrument in a newborn with suspected ARM; use an appropriate nonrectal temperature method. 𝗔𝘃𝗼𝗶𝗱: Unprescribed rectal stimulation, cotton swabs, enemas, tubes or digital examinations. 𝗥𝗲𝗮𝘀𝗼𝗻: Abnormal or blindly ending anatomy, fistulas and delicate surgical repairs can be injured; manipulation can cause perforation, infection or fistula damage. 𝗔𝗳𝘁𝗲𝗿 𝗿𝗲𝗽𝗮𝗶𝗿: The restriction applies during relevant postoperative care; any later rectal procedure requires approval based on the child's repaired anatomy, not a universal lifetime ban.

ARM – Perineal Hygiene and Skin Integrity

𝗪𝗵𝘆 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁: Stool emerging through an abnormal opening or fistula irritates nearby skin, increasing risk of breakdown and infection. 𝗡𝘂𝗿𝘀𝗶𝗻𝗴 𝗰𝗮𝗿𝗲: Clean the perineum gently, keep skin dry as appropriate, use prescribed protective skin care and observe where stool is passing. 𝗔𝘀𝘀𝗲𝘀𝘀: Redness, skin breakdown, abnormal drainage, swelling, irritation and changes in stool passage. 𝗔𝗰𝘁𝗶𝗼𝗻: Document findings and report concerning changes promptly.

ARM – Long-Term Prognosis and Complications

𝗖𝗼𝗻𝘁𝗶𝗻𝗲𝗻𝗰𝗲 𝗽𝗿𝗲𝗱𝗶𝗰𝘁𝗼𝗿 𝟭: Level of malformation: low defects generally have better bowel-control outcomes than high defects. 𝗖𝗼𝗻𝘁𝗶𝗻𝗲𝗻𝗰𝗲 𝗽𝗿𝗲𝗱𝗶𝗰𝘁𝗼𝗿 𝟮: Integrity and development of the anal sphincter muscles. 𝗖𝗼𝗻𝘁𝗶𝗻𝗲𝗻𝗰𝗲 𝗽𝗿𝗲𝗱𝗶𝗰𝘁𝗼𝗿 𝟯: Intact sacral anatomy, sacral nerves and pelvic innervation; abnormalities affect bowel and bladder control. 𝗖𝗼𝗺𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀: Chronic constipation and fecal retention, overflow soiling, fecal incontinence, possible urinary incontinence and impaired quality of life; postoperative strictures may also occur. 𝗙𝗼𝗹𝗹𝗼𝘄-𝘂𝗽: Bowel function, growth, continence and quality of life need monitoring into childhood even when the reconstruction is anatomically successful.

ARM – Postoperative Anal/Anastomotic Stricture and Dilatation

𝗖𝗼𝗺𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻: Scar formation after anorectal reconstruction may narrow the anal opening or bowel anastomosis, producing a stricture (stenosis). 𝗖𝗼𝗻𝘀𝗲𝗾𝘂𝗲𝗻𝗰𝗲𝘀: Difficulty passing stool, constipation or obstructive symptoms; report changes in stool caliber or passage. 𝗣𝗿𝗲𝘃𝗲𝗻𝘁𝗶𝗼𝗻/𝘁𝗿𝗲𝗮𝘁𝗺𝗲𝗻𝘁: Some children require scheduled, gradual anal dilatations under the surgical team's protocol to prevent or treat narrowing. 𝗣𝗮𝗿𝗲𝗻𝘁 𝗶𝗻𝘀𝘁𝗿𝘂𝗰𝘁𝗶𝗼𝗻: Teach technique, size and timing ONLY when prescribed by the surgeon; never perform unapproved dilatation. 𝗥𝗲𝗰𝗼𝘃𝗲𝗿𝘆: The notes mention approximately one month of recovery, but postoperative healing and dilatation schedules vary by procedure and child.

ARM – Parent Education and Home Management

𝗖𝗼𝗹𝗼𝘀𝘁𝗼𝗺𝘆 𝗰𝗮𝗿𝗲: Teach parents to empty and change the pouch, assess stoma color and output, and protect surrounding skin. 𝗦𝘁𝗼𝗺𝗮 𝘄𝗮𝗿𝗻𝗶𝗻𝗴𝘀: Report abnormal color, bleeding, marked swelling, skin breakdown or unusual output. 𝗕𝗼𝘄𝗲𝗹 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Maintain suitable diet and hydration; give prescribed stool softeners, laxatives or irrigations to prevent constipation and fecal impaction. 𝗧𝗼𝗶𝗹𝗲𝘁 𝘁𝗿𝗮𝗶𝗻𝗶𝗻𝗴: Set realistic expectations. Sensory, sphincter or sacral nerve limitations may require specialist continence and toilet-training support. 𝗙𝗼𝗹𝗹𝗼𝘄-𝘂𝗽: Track stool pattern, growth, nutrition, perineal skin integrity and continence; attend surgical follow-up and seek help for obstructive symptoms. 𝗘𝗱𝘂𝗰𝗮𝘁𝗶𝗼𝗻: Anatomical repair does not guarantee immediate normal bowel control; some children need long-term support.

ARM – When Are Surgeries Performed?

𝗔𝘁𝗿𝗲𝘀𝗶𝗮: Congenital absence or closure of a normal GI opening or passage, causing obstruction. 𝗨𝗽𝗽𝗲𝗿 𝗚𝗜 𝗮𝘁𝗿𝗲𝘀𝗶𝗮: Lecturer’s shorthand = surgery ASAP, generally after initial stabilization (not always an immediate emergency operation). 𝗟𝗼𝘄𝗲𝗿 𝗚𝗜 𝗮𝘁𝗿𝗲𝘀𝗶𝗮: Lecturer’s shorthand = EMERGENT surgical evaluation because complete distal obstruction risks perforation. 𝗙𝗶𝘀𝘁𝘂𝗹𝗮: Usually requires timely surgical evaluation and repair; urgency depends on anatomy, drainage and infant stability. 𝗦𝘁𝗲𝗻𝗼𝘀𝗶𝘀: Requires prompt assessment; a rectal tube may be considered ONLY if the surgical team prescribes it. 𝗖𝗹𝗶𝗻𝗶𝗰𝗮𝗹 𝗻𝗼𝘁𝗲: These are course mnemonics, not absolute timing rules; resuscitation and neonatal surgical assessment guide treatment.

ARM – Differential Diagnosis: No Meconium / Rectal Findings

𝗟𝗲𝗰𝘁𝘂𝗿𝗲𝗿’𝘀 𝗺𝗻𝗲𝗺𝗼𝗻𝗶𝗰: “No kaki – finger in rectum” was used as a simplified comparison of obstructive conditions. 𝗛𝗶𝗿𝘀𝗰𝗵𝘀𝗽𝗿𝘂𝗻𝗴: “If I feel nothing” → the rectum may be empty despite stool retained farther up the bowel. 𝗔𝘁𝗿𝗲𝘀𝗶𝗮: “If I feel something narrow” → the distal passage may be absent, closed or malformed. 𝗦𝘁𝗲𝗻𝗼𝘀𝗶𝘀: “If a bunch of kaki comes out” → the lecturer’s description of a narrowed passage with retained stool. 𝗦𝗮𝗳𝗲𝘁𝘆/𝗮𝗰𝗰𝘂𝗿𝗮𝗰𝘆: These findings are NOT reliable diagnoses; explosive stool can also occur in Hirschsprung disease. Do not perform unprescribed digital rectal examinations in suspected ARM. 𝗔𝗰𝘁𝘂𝗮𝗹 𝗱𝗶𝗮𝗴𝗻𝗼𝘀𝗶𝘀: Inspect the anus/perineum and use appropriate imaging for ARM; rectal biopsy confirms Hirschsprung disease.

Hirschsprung Disease (HD) vs. Anorectal Malformations (ARM)

𝗛𝗶𝗿𝘀𝗰𝗵𝘀𝗽𝗿𝘂𝗻𝗴 𝗱𝗶𝘀𝗲𝗮𝘀𝗲 (𝗛𝗗): Congenital NEUROLOGICAL/innervation defect: ganglion cells are absent, so the anatomically present distal bowel cannot relax or perform coordinated peristalsis. 𝗔𝗻𝗼𝗿𝗲𝗰𝘁𝗮𝗹 𝗺𝗮𝗹𝗳𝗼𝗿𝗺𝗮𝘁𝗶𝗼𝗻 (𝗔𝗥𝗠): Congenital STRUCTURAL defect: the anus/rectum is absent, narrowed, misplaced or abnormally connected. 𝗘𝘅𝗮𝗺 𝘀𝗵𝗼𝗿𝘁𝗵𝗮𝗻𝗱: HD = the structure is present but the nerves do not work; ARM = the anatomy is abnormal. 𝗗𝗶𝗮𝗴𝗻𝗼𝘀𝗶𝘀: HD → rectal biopsy showing aganglionosis. ARM → perineal examination and imaging to map the defect. 𝗧𝗿𝗲𝗮𝘁𝗺𝗲𝗻𝘁: HD → remove aganglionic bowel (pull-through). ARM → reconstruct the anorectal anatomy, sometimes in stages

Surgery - lesson points

1. The only reason to go into an EMERGENCY surgery is if there is enterocolitis

2. Part of the diagnosis - besides contrast material/imaging and biopsy, another indication is if we put a finger up the infant's rectum and no fecal comes out, it indicates that the problem is not the rectum or the lower bit of the colon, but further up in the intestine גס

3. In a surgery, "pull through" the surgery works next to the pathologist. We check from the lower part of the intestine, check a biopsy for ganglion, and remove as least as possible from the intestine. It becomes a problem when the disease affects the upper part of the intestine.

   1. Before surgery - fast, zonda

   2. היפרדות של השקה? , bleeding, infection

   3. Long term complications: no control over the sphincters, "psychological" constipation

   4. AFTER the surgery - for at least a month - NOTHING will enter the rectum, and we do NOT give anything to help the fecal PO. We want it to be NATURAL

   5. We do not give  ANY food until after their first poop

   6. We get concerned after 5 days of no kaki