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Predictive factors of negative outcome in initial atropine therapy for infantile hypertrophic pyloric stenosis

Yuhki Koike1, Keiichi Uchida, Makoto Nakazawa

  • 1Department of Pediatric Surgery, National Mie Hospital, Mie, Japan; Department of Gastrointestinal and Pediatric Surgery, Division of Reparative Medicine, Institute of Life Sciences, Mie University Graduate School of Medicine, Mie, Japan.

Insights

Projectile vomiting five or more times after starting atropine therapy indicates a negative outcome for infantile hypertrophic pyloric stenosis. This finding helps determine if surgery or initial atropine treatment is best for infants.

Area of Science:

  • Pediatric Surgery
  • Gastroenterology
  • Neonatal Care

Background:

  • Infantile hypertrophic pyloric stenosis (IHPS) is often treated non-operatively with atropine to avoid surgical risks.
  • However, atropine therapy for IHPS can fail in some cases, necessitating further intervention.
  • Predictive factors for negative outcomes in initial atropine therapy for IHPS remain unclear.

Purpose of the Study:

  • To identify predictive markers for negative outcomes in initial intravenous atropine (IA) therapy for IHPS.
  • To provide insights for clinical decision-making regarding treatment strategies for IHPS.

Main Methods:

  • Retrospective analysis of 76 IHPS patients treated between 1998 and 2011.
  • Evaluation of potential risk factors associated with treatment failure in patients undergoing initial non-operative therapy.

Main Results:

  • Out of 31 patients receiving initial non-operative therapy, 18 (58%) responded successfully to IA and oral atropine.
  • Univariate analysis identified lack of weight gain, elevated urine potassium, and projectile vomiting (PV) ≥5 times in 3 days as risk factors for negative outcomes.
  • Multivariate analysis revealed PV ≥5 in 3 days as an independent predictor of atropine failure in IHPS.

Conclusions:

  • Frequent projectile vomiting (≥5 episodes in 3 days) after initiating IA therapy is a significant indicator of potential treatment failure in IHPS.
  • This finding aids clinicians in deciding between early surgical intervention and initial atropine therapy for IHPS management.
Abstract

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