Hypertrophic pyloric stenosis (Pediatrics - PEDS)

Medium urgency
-Moderately severe

It is a disease caused by a narrowing of the pylorus, which is the passageway of the digestive tract located between the stomach and the first portion of the small intestine or duodenum.

It mainly affects young infants between 15 days and 2 months of age. The causes are not known.

Vomiting is the first symptom in most infants. Other symptoms appear several weeks after birth and may include abdominal pain, belching, constant hunger, dehydration, failure to gain weight or weight loss, undulatory movement of the abdomen shortly after feeding and just before vomiting occurs.

The diagnosis is made through clinical history and physical examination, confirmed by abdominal ultrasound.

The treatment of this disease is surgical.

Bibliographic references
  1. Anthony P Olivé, MD, Erin E Endom, MD. Infantile hypertrophic pyloric stenosis. Uptodate. Oct 19, 2016.
  2. Eberly MD, Eide MB, Thompson JL, Nylund CM. Azithromycin in early infancy and pyloric stenosis. Pediatrics 2015; 135:483.
  3. Krogh C, Fischer TK, Skotte L, et al. Familial aggregation and heritability of pyloric stenosis. JAMA 2010; 303:2393.
  4. Sommerfield T, Chalmers J, Youngson G, et al. The changing epidemiology of infantile hypertrophic pyloric stenosis in Scotland. Arch Dis Child 2008; 93:1007.
  5. Svenningsson A, Svensson T, Akre O, Nordenskjöld A. Maternal and pregnancy characteristics and risk of infantile hypertrophic pyloric stenosis. J Pediatr Surg 2014; 49:1226.
Author
Dr. Maria Trabazo
Copyright
© TeckelMedical 2026

Symptoms

    Milk vomit


    Gushing vomit


    Vomit after eating


    Severe vomiting


    Irritable or upset

Pre-hospital care recommendations

Maintain a fluid intake of 6 - 8 cups per day.
Keep calm.