本文测定71名婴幼儿食管下端括约肌动力学表现。结果表明,40例对照组中出生后6天内组(8例)食管下端括约肌压力(LESP)值明显偏低(6.7±2.15mmHg),食管下端高压区长度亦偏低(0.82±0.2cm),前者与出生后7天以上组比较有明显差异。31例病变组中,胃食管返流与先天性幽门肥厚性狭窄两组LESP值低,而食管下端狭窄组则偏高。文章讨论了对照组LESP值、食管下端括约肌抗返流功能及可能累及食管下端括约肌功能疾病的食管测压表现。 This article measured 71 infants lower esophageal sphincter dynamic performance. The results showed that the lower esophageal sphincter pressure (LESP) was significantly lower (6.7 ± 2.15mmHg) and the lower esophageal hypertension (0.82 ± 0.2cm) was lower in the control group than in the 6th day after birth The former is significantly different from the group of more than 7 days after birth. Among the 31 cases, the LESP values ​​of gastroesophageal reflux and congenital pyloric hypertrophic stenosis were both low, while those in the lower esophageal stenosis group were higher. The article discusses LESP values ​​in the control group, anti-reflux function of the lower esophageal sphincter and esophageal manometry manifestations that may affect the lower esophageal sphincter function.