Treatment of gastroesophageal reflux (GER) in preterm infants with traditional treatments, such as body positioning, and newer treatments with pharmacologic agents appear to be ineffective, and pharmacologic agents in particular may cause significant harm, according to a clinical report by the American Academy of Pediatrics Committee on Fetus and Newborn.
“I think that probably the most important point for any physician, including neonatologists, is that the committee concluded on the basis of the evidence that Eric Eichenwald, MD, lead author of the committee’s clinical report and chief of neonatology at Children’s Hospital of Philadelphia, said in an interview. “So really the bottom line of the clinical report is watchful waiting, conservative management, and patience is the most important approach to a baby that you think is suffering from reflux.”
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Pharmacologic management
The committee members focused on four categories of pharmacologic interventions in their report in Pediatrics.
Prokinetic (promotility) agents, such as metoclopramide, domperidone, and erythromycin, are widely used in treating symptoms of GER in older infants and appear to improve gastric emptying, reduce regurgitation, and enhance lower esophageal sphincter tone, but they do not appear to reduce GER symptoms in preterm infants. In addition to not being effective in these infants, there is also a potential for significant adverse events, including cardiac arrhythmia and neurologic side effects. Another common pharmacologic treatment is the use of sodium alginate in combination with sodium bicarbonate. In the presence of gastric acid, sodium alginate precipitates as a gel that forms a physical barrier that protects the gastric mucosa. When sodium bicarbonate is added, a carbon dioxide foam forms that is less harmful to the esophagus than GER-related fluids. While this combination treatment has reduced the number of acidic GER exposures and esophageal acid exposure in preterm infants in small studies, the long-term safety has not been evaluated in this populations.
Histamine2 (H2) blockers, like famotidine and ranitidine, also are commonly prescribed to treat preterm infant gastroesophageal reflux. H2 blockers compete with H2 for the histamine receptors of the parietal cells, which causes a decrease in hydrochloric acid and a subsequent increase in intragastric pH. These are often prescribed on the premise that GER symptoms are secondary to acid reflux in the lower esophagus, but there is no research on the efficacy of H2 blockers on the symptom profile of GER in preterm infants. This class of drugs also has been linked with an increased risk of necrotizing enterocolitis and a higher incidence of late-onset infections and death. This is thought to be caused by alteration of the intestinal microbiome, according to the clinical report.
Proton pump inhibitors (PPIs) are another treatment for reducing acid secretion by the parietal cells, but are largely ineffective in relieving clinical signs of GER in preterm infants. PPIs also have been associated with a higher risk of bacterial overgrowth, gastroenteritis, and community-acquired pneumonia in older children. It is theorized that, because of the acid mitigating effects of PPIs, they will have the potential for adverse effects similar to those seen with H2 blockers, although this has not been investigated.
Traditional treatments
Dr. Eichenwald also was quick to point out that even traditional methods of treating preterm infant GER are not particularly effective.
“Some of the conservative approaches that have been advocated include head-up position and different ways of side-lying to enhance emptying of the stomach after feeding. And none of those have been shown to reduce clinically appreciated signs of reflux in preterm infants. If anything – in term babies – some of those positions have been shown to increase the amount of reflux,” he said in an interview.
“I think that the other important point to make about this is that there are many signs that clinicians attribute to reflux in preterm babies, which include wakefulness, irritability, arching after a feeding. And none of those behaviors have been shown to be associated with reflux when it’s critically examined using either a pH Probe or multichannel impedance monitoring. And therefore the treatments to try to decrease reflux don’t really have an effect on those behaviors either.”
Parental concern
Treating a pediatric issue is not as simple as diagnosis and treatment. Often, parents are justifiably concerned about their children. Dr. Eichenwald sees educating parents as an important facet of treating GER in preterm infants.