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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.
Background:
The predictive factors of negative outcome in initial i.v. atropine (IA) therapy of infantile hypertrophic pyloric stenosis (IHPS) are unknown. Conservative therapy for IHPS is useful for infants because it does not have the risk of surgical and anesthetic stress, but some cases of atropine therapy result in failure. This study clarified the predictive markers of negative outcome in initial atropine therapy for IHPS.
Methods:
Seventy-six patients with IHPS admitted from 1998 to 2011 were included in this study. The predictive risk factors of negative outcome in initial atropine therapy for IHPS were evaluated.
Results:
Thirty-one patients initially underwent non-operative therapy for IHPS during the study period. Of the 31 patients, 18 (58%) ceased projectile vomiting (PV) with IA and subsequent oral atropine. Univariate analysis showed that lack of bodyweight gain before treatment, elevated urine potassium at admission, and PV occurring ≥5 times (PV ≥5) in total for 3 days from IA initiation were predictive risk factors for negative outcome in IHPS. Multivariate analysis identified only PV ≥5 in total for 3 days after IA initiation as independently associated with failure of atropine for IHPS.
Conclusions:
PV ≥5 in total for 3 days after IA initiation is a potential indicator of negative outcome of IA in IHPS patients. The present results provide valuable information for determining whether early surgical intervention for IHPS or initial atropine therapy is the best option.
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