Functional constipation in children: What physicians should know

Figure 8 High amplitude propagating contractions. A: Proper position of the colonic catheter; B: graphical demonstration of abnormal high amplitude propagating contractions (HAPCs) with absent HAPCs at the sigmoid region (**) but preserved colo-anal reflex (arrow). A and B: Citation: Palittiya Sintusek. Chronic constipation. In: Supapitiporn K, editor. Pediatric practice: simple&applicable. Bangkok: Chulalongkorn University, 2021: 96. Copyright ©The Authors 2017. Published by Department of Pediatrics, Chulalongkorn University. The authors have obtained the permission for figure using from Department of Pediatrics, Chulalongkorn University (Supplementary material).