What is the common presentation of Pyloric stenosis?

typically presents in the second to fourth weeks of life with vomiting

What patient groups is Pyloric stenosis most common?

• incidence of 4 per 1,000 live births
• 4 times more common in males
• 10-15% of infants have a positive family history
• first-borns are more commonly affected

What are the main clinical features of Pyloric stenosis?

• 'projectile' vomiting, typically 30 minutes after a feed
• constipation and dehydration may also be present
• a palpable mass may be present in the upper abdomen

What blood derangement is seen in Pyloric stenosis?

hypochloraemic, hypokalaemic alkalosis due to persistent vomiting

How is Pyloric stenosis diagnosed?

ultrasound

What is the management of Pyloric stenosis?

Ramstedt pyloromyotomy

What is the pathophysiology of Pyloric stenosis?

caused by hypertrophy of the circular muscles of the pylorus