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Updated: May 10, 2026

Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation
Published on: September 22, 2023
Evaluation of hypertrophic pyloric stenosis by pediatric emergency physician sonography
Adam B Sivitz1, Cena Tejani, Stephanie G Cohen
1Department of Emergency Medicine, Newark Beth Israel Medical Center, Children's Hospital of New Jersey, Newark, NJ, USA. asivitz@gmail.com
Insights
Pediatric emergency physicians can accurately diagnose hypertrophic pyloric stenosis (HPS) using ultrasound. Their sonography demonstrated 100% sensitivity and specificity in identifying HPS in infants.
Area of Science:
- Pediatric Emergency Medicine
- Diagnostic Imaging
- Gastroenterology
Background:
- Hypertrophic pyloric stenosis (HPS) is a common cause of nonbilious vomiting in infants.
- Accurate and timely diagnosis is crucial for appropriate management.
- Pediatric emergency physicians (EPs) are increasingly utilizing point-of-care ultrasound (POCUS).
Purpose of the Study:
- To assess the diagnostic accuracy of ultrasound performed by pediatric EPs for suspected HPS in infants.
- To compare measurements made by EPs with those made by radiology staff.
Main Methods:
- Prospective observational pilot study conducted in a pediatric emergency department.
- Included infants with suspected HPS requiring abdominal ultrasound.
- Pediatric EPs performed initial ultrasound examinations.
Main Results:
- Sixty-seven infants were enrolled. Pediatric EPs achieved 100% sensitivity and 100% specificity in identifying the pylorus in HPS cases.
- No statistically significant differences were found between EP and radiology staff measurements of pyloric muscle width or length.
Conclusions:
- Trained pediatric EPs can accurately perform and interpret ultrasounds for HPS evaluation.
- Point-of-care ultrasound by EPs is a reliable tool for diagnosing HPS in infants.
Objectives:
The objective was to evaluate the accuracy of pediatric emergency physician (EP) sonography for infants with suspected hypertrophic pyloric stenosis (HPS).
Methods:
This was a prospective observational pilot study in an urban academic pediatric emergency department (PED). Patients were selected if the treating physician ordered an ultrasound (US) in the department of radiology for the evaluation of suspected HPS.
Results:
Sixty-seven patients were enrolled from August 2009 through April 2012. When identifying the pylorus, pediatric EPs correctly identified all 10 positive cases, with a sensitivity of 100% (95% confidence interval [CI] = 62% to 100%) and specificity of 100% (95% CI = 92% to 100%). There was no statistical difference between the measurements obtained by pediatric EPs and radiology staff for pyloric muscle width or length (p = 0.5 and p = 0.79, respectively).
Conclusions:
Trained pediatric EPs can accurately assess the pylorus with US in the evaluation of HPS with good specificity.
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