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Hypertrophic pyloric stenosis: determination of muscle dimensions by ultrasound

Department of Pediatrics, University Hospital of Odense, Denmark ^* Department of Radiology, University Hospital of Odense, Denmark

Correspondence: Address for correspondence: Poul-Erik Lund Kofoed, MD, Skovparken 91-2.th, DK—6000 Kolding, Denmark.

To evaluate the usefulness of ultrasound in hypertrophic pyloric stenosis (HPS) and to analyse the correlation between the dimensions of the pyloric muscle and the age and the weight of the child, 34 children with suspected HPS and 34 controls were examined. An overlap between the dimensions of the pyloric muscle in the HPS group and in the controls stresses the need to assess the muscle length, the muscle diameter, and the muscle wall thickness in establishing the sonographic diagnosis of HPS. We found the following criteria useful: muscle length 19 mm, muscle diameter 10 mm, and muscle wall thickness 4 mm. The results did not confirm previous reports of increasing dimensions of the pyloric muscle with age and weight.

Received for publication March 1, 1987. Revision received May 1, 1987.

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