Your question: What are the results of excessive vomiting in an infant with pyloric stenosis?

Pyloric stenosis is a problem that affects babies between birth and 6 months of age and causes forceful vomiting that can lead to dehydration. It is the second most common problem requiring surgery in newborns. The lower portion of the stomach that connects to the small intestine is known as the pylorus.

Why does pyloric stenosis cause projectile vomiting?

You may notice wavelike contractions (peristalsis) that ripple across your baby’s upper abdomen soon after feeding but before vomiting. This is caused by stomach muscles trying to force food through the narrowed pylorus.

How often does a baby vomit with pyloric stenosis?

While occasional dribbles of spit-up after meals is common in infants and usually harmless, true vomiting is more concerning. In some babies, frequent projectile vomiting can be a symptom of a condition called hypertrophic pyloric stenosis (HPS); it occurs in 1 out of every 500 or so babies.

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Does pyloric stenosis cause vomiting after every feeding?

Pyloric stenosis is an urgent condition that requires immediate evaluation. Call your doctor if your baby has vomiting and any of the following symptoms: persistent or projectile vomiting after feeding.

Does pyloric stenosis cause bilious vomiting?

Symptoms. Babies with pyloric stenosis usually have progressively worsening vomiting during their first weeks or months of life. The vomiting is often described as non bilious and projectile vomiting, because it is more forceful than the usual spit ups commonly seen at this age.

What does pyloric stenosis vomit look like?

The vomited milk might smell curdled because it has mixed with stomach acid. The vomit will not contain bile, a greenish fluid from the liver that mixes with digested food after it leaves the stomach. Despite vomiting, a baby with pyloric stenosis is usually hungry again soon after vomiting and will want to eat.

What happens if pyloric stenosis goes untreated?

If left untreated, hypertrophic pyloric stenosis can cause: Dehydration. Electrolyte imbalance. Lethargy.

How soon after eating do babies with pyloric stenosis vomit?

Symptoms start when babies are around 2 to 8 weeks old. Infants with pyloric stenosis may eat well but have these symptoms: Frequent projectile vomiting (forceful vomiting), usually within a half hour to an hour after eating.

What are the symptoms of pyloric stenosis in babies?

The most common symptoms noted in a baby with pyloric stenosis is forceful, projectile vomiting.

Other symptoms may include:

  • Weight loss.
  • Ravenously hungry despite vomiting.
  • Lack of energy.
  • Fewer bowel movements.
  • Constipation.
  • Frequent, mucous stools.
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When should I take my baby to the doctor for vomiting?

Call your child’s healthcare provider and seek medical care if:

  1. Your child is younger than 2 months of age and vomits after all feedings.
  2. Vomiting has persisted longer than 24 hours.
  3. Your baby is wetting significantly fewer diapers than normal.
  4. Your child hasn’t urinated in 6 to 8 hours.


Why is my baby throwing up with no fever?

Most of the time, gastroenteritis is caused by a virus like rotavirus or norovirus. But you can also get it from bacteria like E. coli or salmonella. Although norovirus can sometimes cause a low-grade fever, you can also have it with no fever at all.

Can overfeeding a baby cause projectile vomiting?

Forceful or projectile vomiting, though, or spitting up large amounts of milk after most feedings, can be a sign of a problem. In formula-fed babies, vomiting may happen after overfeeding, or because of an intolerance to formula.

Should I feed my baby after projectile vomiting?

Offer your baby a feeding after they’ve stopped throwing up. If your baby is hungry and takes to the bottle or breast after vomiting, go right ahead and feed them. Liquid feeding after vomiting can sometimes even help settle your baby’s nausea. Start with small amounts of milk and wait to see if they vomit again.

Why does pyloric stenosis vomit not have bile?

The vomitus contains no bile because the obstruction is proximal to the bile duct opening (Fig. 7.2). The cardia of the normal child acts as a sphincter to prevent retrograde flow of stomach contents up the oesophagus.

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Is pyloric stenosis an emergency?

Emergency Department Care

Infantile hypertrophic pyloric stenosis (IHPS) may be described as a medical emergency or a medical urgency based on how early in the course the patient presents.

Is pyloric stenosis a birth defect?

Pyloric stenosis is a birth defect. This means that your child is born with it. This condition may run in some families.

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