OBJECTIVETo explore the diagnosis and treatment methods of pediatric anismus.

METHODSTwenty-nine patients with idiopathic chronic constipation, diagnosed with anismus by colon barium contrast and anorectal manometry from Nov. 2001 to Nov. 2004 in our hospital, were investigated retrospectively.

RESULTSThis group consisted of 13 men and 16 women whose mean age was (6.7+/-4.0) years. Hirschsprung diseases were excluded from the patients by colon barium contrast and rectoanal inhibitory reflex (RAIR) examination. Normal RAIR (5-10 ml elicited) was showed on 21 cases while weakened RAIR (15-30 ml elicited) was showed on 8 cases. After the diagnosis, the patients were treated by toilet training, diet regulation and laxative for 1-2 months. 4 cases were recovered, 5 cases were improved and 20 cases were relied on glycerin suppository. Four cases, relied on glycerin suppository, underwent Lynn procedure and had good results after 5-24 months follow-up. Two cases were re-examined by anorectal manometry 3 and 6 months after surgery, the resting pressure and the high pressure zone (HPZ) decreased, but the simulation defecation reflex was still abnormal.

CONCLUSIONSThe diagnosis of pediatric anismus relies on history of constipation, combined with anorectal manometry and colon barium contrast. Lynn procedure could be chosen for the patients unsatisfied in toilet training and other non-operative treatment.

Adolescent ; Anus Diseases ; diagnosis ; surgery ; Child ; Child, Preschool ; Constipation ; diagnosis ; surgery ; Female ; Follow-Up Studies ; Humans ; Male ; Muscle Hypotonia ; diagnosis ; surgery ; Pelvic Floor ; physiopathology ; Rectal Diseases ; diagnosis ; surgery

BACKGROUND/AIMS: The causes of functional anorectal outlet obstruction (outlet obstruction) include functional defecation disorder (FDD), rectocele, and rectal intussusception (RI). It is unclear whether outlet obstruction is associated with rectal hyposensitivity (RH) in patients with functional constipation (FC). The aim of this study was to determine the association between RH and outlet obstruction in patients with FC. METHODS: This was a retrospective study using a prospectively collected constipation database, and the population comprised 107 patients with FC (100 females; median age, 49 years). We performed anorectal manometry, defecography, rectal barostat, and at least two tests (balloon expulsion test, electromyography, or colon transit time study). RH was defined as one or more sensory threshold pressures raised beyond the normal range on rectal barostat. We investigated the association between the presence of RH and an outlet obstruction such as large rectocele (> 2 cm in size), RI, or FDD. RESULTS: Forty patients (37.4%) had RH. No significant difference was observed in RH between patients with small and large rectoceles (22 [44.9%] vs. 18 [31%], respectively; p = 0.140). No significant difference was observed in RH between the non-RI and RI groups (36 [36.7%] vs. 4 [30.8%], respectively; p = 0.599). Furthermore, no significant difference in RH was observed between the non-FDD and FDD groups (19 [35.8%] vs. 21 [38.9%], respectively; p = 0.745). CONCLUSIONS: RH and outlet obstruction are common entities but appear not to be significantly associated.
Adult ; Aged ; Aged, 80 and over ; Anus Diseases/diagnosis/*physiopathology ; Constipation/diagnosis/*physiopathology ; Cross-Sectional Studies ; *Defecation ; Defecography ; Electromyography ; Female ; Humans ; Intussusception/diagnosis/*physiopathology ; Male ; Manometry ; Middle Aged ; Pressure ; Rectocele/diagnosis/*physiopathology ; Rectum/*innervation ; Retrospective Studies ; *Sensory Thresholds ; Young Adult