Ultrasonographic diagnosis of pre-term versus term infantile hypertrophic pyloric stenosis

Abstract EN

Aim: To evaluate the determinants of ultrasonographic measurements of pyloric length and muscle thickness in pre-term versus term infants with hypertrophic pyloric stenosis (HPS).

? Patients and methods: Fifty infants (20 pre-term and 30 term) were operated upon for UPS at Assiut University Hospital over 2-year period.

Ultrasonographic measurements of pyloric length and muscle thickness were related to age, history of prematurely, weight, sex andfamily history of H.P.S.

Results: Pyloric length in infants with HPS was significantly greater at those born at term compared to those born prematurely (18.4mm SD 2-1 vs 17.1mm SD 3), P = 0.042,this was explained by body weight and length increasing by 1.1mm (SD 0.34) per kilogram (P = 0.002).

There was no significant relationship with measured muscle thickness.

Conclusion: Ultrasonographic measurement of pyloric length is strongly correlated with the weight of the infant irrespective of other factors.

The relationship of length and weight may be useful in confirming the presence of HPS in small and pre-term infants.