What are the diagnostic evaluation of pyloric stenosis?

Blood tests to check for dehydration or electrolyte imbalance or both. Ultrasound to view the pylorus and confirm a diagnosis of pyloric stenosis. X-rays of your baby’s digestive system, if results of the ultrasound aren’t clear.

When is pyloric stenosis diagnosed?

Signs of pyloric stenosis usually appear within three to five weeks after birth. Pyloric stenosis is rare in babies older than 3 months.

What are the sonographic criteria for hypertrophic pyloric stenosis?

The sonographic criteria for positive IHPS were pyloric muscle wall thickness > 3 mm, pyloric canal length 14–20 mm, pylorus diameter > 12 mm and vascularity of the pylorus mucosa nd muscles.

Can a pediatrician diagnose pyloric stenosis?

The classic symptom is vomiting. However, with persistent vomiting the infants loose weight and may appear yellow or jaundiced and become dehydrated and lethargic. Your infant’s pediatrician and/or surgeon may be able to diagnose pyloric stenosis based on the history and physical exam.

What PH condition is present with pyloric stenosis?

Patients who have pyloric stenosis typically present with hypochloremic metabolic alkalosis. Although the serum potassium level may be normal or low, there often is total body potassium depletion.

What is pyloric sphincter?

The pyloric sphincter muscle is responsible for controlling how partially digested food, called chyme, moves from your stomach and into your intestines in a timely manner. This process, known as gastric emptying, should happen at an optimal rate to ensure good digestion.

How do you scan for pyloric stenosis?

To assess for pyloric stenosis, first measure the muscular layer of pylorus in longitudinal and transverse views. > 3mm thickness raises concern for hypertrophy. Then measure the length of the pyloric canal. There is a range in the radiology literature for abnormal pyloric channel length from >15 to 19 mm.

Can an upper GI detect pyloric stenosis?

Upper GI imaging (UGI) can help to confirm the diagnosis of infantile hypertrophic pyloric stenosis but is not routinely performed unless ultrasonography is nondiagnostic. Although rarely performed now, the upper gastrointestinal study used to be the gold standard.

Can pyloric stenosis be missed on ultrasound?

Ultrasonography, although reliable for diagnosing hypertrophic pyloric stenosis, may miss malrotation, which is the most serious cause of vomiting in infants. These children require a UGI examination.