title: Characterizing colonic motility in children with chronic intractable constipation: a look beyond high-amplitude propagating sequences.
abstract: Children with chronic intractable constipation experience severe and long-lasting symptoms, which respond poorly to conventional therapeutic strategies. Detailed characterization of colonic motor patterns in such children has not yet been obtained.
  
  
  
  In 18 children with chronic intractable constipation, a high-resolution water-perfused manometry catheter (36 sensors at 1.5-cm intervals) was colonoscopically placed with the tip at the distal transverse colon. Colonic motor patterns were recorded for 2 h prior to and after a meal and then after colonic infusion of bisacodyl. These data were compared with previously published colonic manometry data from 12 healthy adult controls and 14 adults with slow-transit constipation.
  
  
  
  The postprandial number of the retrograde cyclic propagating motor pattern was significantly reduced in these children compared with healthy adults (children, 3.1 ± 4.7/h vs healthy adults, 34.7 ± 45.8/h; p < 0.0001) but not constipated adults (4.5 ± 5.6/h; p = 0.9). The number of preprandial long-single motor patterns was significantly higher (p = 0.003) in children (8.0 ± 13.2/h) than in healthy adults (0.4 ± 0.9/h) and in constipated adults (0.4 ± 0.7/h). Postprandial high-amplitude propagating sequences (HAPSs) were rarely observed in children (2/18), but HAPS could be induced by bisacodyl in 16 of 18 children.
  
  
  
  Children with chronic intractable constipation show a similar impaired postprandial colonic response to that seen in adults with slow-transit constipation. Children may have attenuated extrinsic parasympathetic inputs to the colon associated with an increased incidence of spontaneous long-single motor patterns.
authors: Department of Pediatric Gastroenterology and Nutrition, Emma Children's Hospital/Academic Medical Center, Amsterdam, The Netherlands.
authors: S
authors: S
authors: Wessel
authors: Department of Pediatric Gastroenterology and Nutrition, Emma Children's Hospital/Academic Medical Center, Amsterdam, The Netherlands.
authors: I J N
authors: IJ
authors: Koppen
authors: Department of Human Physiology, Flinders University, Adelaide, SA, Australia.
authors: L
authors: L
authors: Wiklendt
authors: Department of Human Physiology, Flinders University, Adelaide, SA, Australia.
authors: M
authors: M
authors: Costa
authors: Department of Pediatric Gastroenterology and Nutrition, Emma Children's Hospital/Academic Medical Center, Amsterdam, The Netherlands.
authors: M A
authors: MA
authors: Benninga
authors: Department of Human Physiology, Flinders University, Adelaide, SA, Australia.|Departments of Gastroenterology and Surgery, Flinders Medical Centre, Adelaide, SA, Australia.
authors: P G
authors: PG
authors: Dinning
mesh_terms: D000293:Adolescent; D057785:Catheters; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D003106:Colon / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D003248:Constipation / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D005260:Female; D005769:Gastrointestinal Motility / Q000502:physiology*; D006801:Humans; D008297:Male; D008365:Manometry / Q000295:instrumentation / Q000379:methods*
keywords: colon; constipated children; high-resolution manometry; motor patterns; neural pathways