Upper esophageal sphincter length ( UESL ) increased with the age . Upper esophageal sphincter pressures ( UESP ) were lower in 1 and 3-year groups than that in other age groups ( P0.01 ) .
上食管括约肌长度（UESL）随年龄的增加而增长（P001），上食管括约肌压力（UESP）以～1岁组和～3岁组为低（P001）。
uesp