Pyloric Stenosis Ultrasound


— Pyloric muscle thickness, i.e. diame­ter of a single muscular wall. (hypoechoic component) on a transverse image: >3 mm (most accurate )

— Length, i.e. longitudinal measurement of pylorus: >15-17 mm.

— Pyloric volume: >1.5 cc. 

— Pyloric transverse diameter: >13 mm.

— Pylorus does not relax (appears fixed)

Pylorus that opens allowing passage of gastric contents will exclude pyloric stenosis.