Gastroesophageal Reflux (GER and GERD) in Infants and Children

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What are GER and GERD in infants and children?

Gastroesophogeal reflux (GER) is the upward flow of stomach contents from the stomach into the esophagus ("swallowing tube"). While not required by its definition, these contents may continue from the esophagus into the pharynx (throat) and may be expelled from the mouth. GER differs from vomiting in that it is generally not associated with a violent ejection. Moreover, GER is generally a singular event in time whereas the vomiting process is commonly several back-to-back events that may ultimately completely empty all stomach contents and yet still persist ("dry heaves"). The difference between GER and GERD (gastroesophogeal reflux disease) is a matter of severity and associated consequences to the patient.

The large majority of healthy, full term infants will have episodes of "spitting up" or "wet burps," which technically qualify to be considered GER. These infants generally do not seem in distress before, during, or after by the reflux process. Likewise, the loss of calories as an outcome of GER is inconsequential since growth parameters including weight gain are not affected. Lastly, there seem to be no short or long term consequences of these reflux experiences. In short, infants with GER are "messy spitters."

The very name of GERD ("disease") implies a much different condition. Infants and children with GERD often experience distress as a consequence of their reflux even if the refluxed stomach contents are not completely ejected from the mouth. Infants and young children may loose so many calories by expulsion that growth is compromised. Some infants or children with GERD may even become averse to feeding due to repeated associations with feeding and pain. Finally, there are a number of short and long term consequences of GERD that are not associated with infants and children with GER. These will be discussed further in this article.

What causes GER and GERD in infants and children?

Infants with GER are a reflection of their immature nervous system. In most infants the junction between the esophagus and stomach is "closed," opening only to allow passage of formula or breast milk into the stomach or to allow the escape of swallowed air via burping.

During episodes of reflux, this junction is continuously open allowing a backwards flow of stomach contents into the esophagus. This reverse flow may occur as a consequence of a relatively large volume of fluid relative to a smaller stomach volume, pressure on the abdominal cavity (for example, placed face down [prone] following a feeding), or overfeeding. Infant GER occurs in over 50% of healthy infants with a peak incidence (65%) at approximately 4 months of age. Most episodes resolve by 12 months of age.

GERD also reflects an opening of the esophageal-stomach junction similar to infant GER. The reasons for GERD, however, are not considered to reflect an immature nervous system. Factors that may contribute to GERD in infants and children include:

  • Increased pressure on the abdomen (over eating, obesity, straining with stool due to constipation, etc.).
  • Slower than normal emptying of stomach contents may predispose infants or children to GERD.
  • Certain medications, foods, and beverages may also be implicated in facilitating such pathological reflux.
  • Recent studies indicate that between 2% to 8 % of children 3 to 17 years of age experience GERD symptoms (detailed later).
Medically Reviewed by a Doctor on 7/18/2014

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