Pyloric stenosis is a common condition in infancy and it caused by the result of hypertrophy of the circular smooth muscle of the pylorus. The diagnosis of the congenital hypertrophic pyloric stenosis has been made traditionally on the basis of
history
and physical examination and in wom the diagnosis is obscure, UGI series as a imaging procedure is very helpful method for diagnosis. But UGI series has some disadvantages such as radiation exposure and risk of aspiration pneumonia. More
rescently
ultrasonograph with the lack of harzards associated with radiation provides an aduitional method of investigation which is accurately diagnosis of some case in which no pyloric mass is palpable. For evaluation of the relationship between the
preoperative condition, sonographic findings, operative findings and postoperative course, we studied in 47 infants who performed ultrasonogram and diagnosed by hypertrophic pyloric stenosis from january 1989 to December 1994. The most prevalent
age
group was between 2 and 4 weeks, and the male to female ratio was 5.7 : 1. In all 47 cases, projectile nonbile stained vomiting was noted and the palpable mass on the RUQ abdomen was noted in 26 cases. Jaundice was observed in 9 cases. In the
preoperative ultrasonogram, the thickeness of the pyloric muscle was between 4.1mm and 6.9mm in 38 cases and the length of the pylorus was between 16mm and 20mm in 33 cases. In operative findings, the thickness of pyloric muscle was between 4.1
mm
and
6.9mm in 37 cases and the length of pylorus was between 16mm and 20mm in 29 cases. No significant difference were noted between the ultrasonographic findings and intraoperative findings. In the comparison of pyoric length on ultrasonographic
finding and
intraoperative findings. In the comparison of pyloric length on ultrasonography between postoperative vomiting group and non vomiting group, mean diameter was measured 20.58mm in the vomiting group and 17.95 mm in the non vomiting group. In
conclusion,
we think that the ultrasonograpy is a helpful method for diagnosis of congenital hypertrophic pyloric stenosis and pyloric length of ultrasonography is correlated well with the duration of postoperative vomiting.
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