Efficacy of ultrasound diagnostic criteria using scoring system for Infantile Hypertrophic Pyloric Stenosis (IHPS)

An analytic cross sectional study in the Department of Paediatric Surgery, Mayo Hospital, Lahore conducted. Twenty patients of non-bilious projectile vomiting with a control group of 20 patients were evaluated from June 2001 to May 2002. An attempt was made to prepare a diagnostic criteria with a scoring system using ultrasonography as a primary tool. Pyloric diameter was 9.1?0.51 in control and 15.25 +/-1.75 patients. Muscular thickness in control group was 1.72 +/- 0.51 in comparison with 4.64 +/- 1.09 in patients. Similarly pyloric length was 11.37 +/-1.47 in control group and 19.84 +/- 1.50 patients. Using probit analysis of ultrasonographic findings a composit scoring was developed and results evaluated. Evaluating 40 cases which included the normal infants (n=20) and infants with IHPS (n=20) both groups could be identified 100% with overall score of 2 or less as normal and those with overall score of 3 or more as having IHPS. All cases of IHPS can be correctly discriminated and diagnosed using these criteria.