caa a22 4500 465772463 CHVBK 20180323111932.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF00177100 doi (NATIONALLICENCE)springer-10.1007/BF00177100 Lower esophageal sphincter function in infantile hypertrophic pyloric stenosis [Elektronische Daten] [Ya-xiong She, Zhen-xin Shen] Esophageal manometry was performed in 18 infants between 29 and 105 days of age with hypertrophic pyloric stenosis. Continuous 24-h esophageal pH monitoring was also carried out in 9 cases before and after pyloromyotomy in order to study lower esophageal sphincter (LES) function in infantile hypertrophic pyloric stenosis (IHPS). The mean preoperative pressure and length of the LES in IHPS were 9.30 mmHg and 1.30 cm respectively, which were significantly lower and shorter than those in controls (P <0.01), and gastroesophageal reflux was highly significant. The esophageal manometric studies showed that LES pressure increased markedly on the 7th postoperative day to 12.58 ± 2.56 mmHg and returned to normal values within 2 to 11 months after operation. The pH monitoring indicated that in most cases reflux had disappeared on the 7th postoperative day and the reflux parameter decreased from 8.34% to 3.34%. Our data suggest that most cases of IHPS (12/18) were accompanied by LES incompetence, but LES competence as a pressure barrier at the gastroesophageal junction became normal after operation. Springer-Verlag, 1990 Infantile hypertrophic pyloric stenosis nationallicence pH monitoring nationallicence Esophageal manometry nationallicence She Ya-xiong Department of Pediatric Surgery, Xin Hua Children's Hospital, Shangahai, China aut Shen Zhen-xin Department of Pediatric Surgery, Xin Hua Children's Hospital, Shangahai, China aut Pediatric Surgery International Springer-Verlag 5/5(1990-08-01), 336-338 0179-0358 5:5<336 1990 5 383 https://doi.org/10.1007/BF00177100 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00177100 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- She Ya-xiong Department of Pediatric Surgery, Xin Hua Children's Hospital, Shangahai, China aut NATIONALLICENCE 700 1- Shen Zhen-xin Department of Pediatric Surgery, Xin Hua Children's Hospital, Shangahai, China aut NATIONALLICENCE 773 0- Pediatric Surgery International Springer-Verlag 5/5(1990-08-01), 336-338 0179-0358 5:5<336 1990 5 383 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer