This study evaluates whether gastric electrical stimulation (GES) improves symptoms in children with severe nausea and vomiting that have not responded to standard treatments. GES is a therapy that delivers small electrical pulses to the stomach to help improve stomach function and reduce symptoms. In this study, children underwent temporary gastric electrical stimulation using a pacing lead placed through a nasogastric tube. The stimulation device was turned OFF for four days and then ON for four days, while participants remained blinded to the stimulation status. Symptoms and tolerance to oral nutrient intake were measured at baseline and during each study phase. The goal of the study was to determine whether active stimulation improves symptoms and nutrient intake compared with the sham period.

Children and adolescents with severe nausea and vomiting that do not respond to medical therapy represent a challenging clinical population. Gastric electrical stimulation (GES) has been used as a treatment option for patients with refractory symptoms, but controlled trials in children are limited.

This single-blinded, sham-controlled clinical trial evaluated the short-term effects of temporary gastric electrical stimulation in pediatric patients with refractory nausea and vomiting. Participants underwent placement of a temporary pacing lead through a nasogastric tube connected to an external stimulator. After placement, the stimulator remained OFF for the first four days followed by ON for the next four days. Participants were blinded to the stimulation status.

Baseline data included demographic characteristics, medical history, nutritional status, and symptom assessments using the Symptom Monitor Worksheet (SMW). Participants also completed a nutrient drink test to evaluate tolerance to oral intake. Symptom scores and nutrient drink test volumes were reassessed at the end of each study phase.

The primary objective of the study was to evaluate changes in nausea and vomiting symptoms during sham and active stimulation phases. Secondary objectives included evaluating changes in symptom severity and frequency across gastrointestinal symptoms and assessing tolerance to nutrient intake during the study periods.

This study aims to better understand whether gastric electrical stimulation may improve symptoms and oral intake in children with refractory nausea and vomiting and to inform future therapeutic approaches for this population.

Inclusion Criteria:

• Age < 21 years
• History of chronic nausea and vomiting refractory to medical therapy for at least 12 months
• Symptoms severe enough to impact overall condition (e.g., weight loss or need for dietary modification)
• Ability of participant and/or parent/guardian to provide informed consent/assent

Exclusion Criteria:

• Mechanical obstruction of the gastrointestinal tract.
• Diagnosis of an eating disorder
• Psychiatric condition deemed by the medical team to pose a safety concern for study participation
• Inability of the participant to communicate symptoms
• Inability of the participant or parent/guardian to read or speak English

Individual participant data will not be publicly shared due to privacy considerations and the small sample size.

Participants underwent placement of a temporary gastric pacing lead through a nasogastric tube connected to an external gastric electrical stimulator. After placement, all participants entered a sham phase during which the stimulator remained OFF for four days, followed by an active stimulation phase during which the stimulator was turned ON for four days. Participants were blinded to stimulation status and outcomes were compared within participants across phases.