The aim of this study is to extrapolate the clinical features of children with severe neurologic impairment (SNI) based on the functional characteristics and comorbidities described in published studies.

Four databases were searched. We included studies that describe clinical features of a group of children with SNI (≥20 subjects <19 years of age with >1 neurologic diagnosis and severe functional limitation) using data from caregivers, medical charts, or prospective collection. Studies that were not written in English were excluded. We extracted data about functional characteristics, comorbidities, and study topics.

We included 102 studies, spanning 5 continents over 43 years, using 41 distinct terms for SNI. The terms SNI and neurologic impairment (NI) were used in 59 studies (58%). Most studies (n = 81, 79%) described ≥3 types of functional characteristics, such as technology assistance and motor impairment. Studies noted 59 comorbidities and surgeries across 10 categories. The most common comorbidities were related to feeding, nutrition, and the gastrointestinal system, which were described in 79 studies (77%). Most comorbidities (76%) were noted in <10 studies. Studies investigated seven clinical topics, with "Gastrointestinal reflux and feeding tubes" as the most common research focus (n = 57, 56%). The next most common topic, "Aspiration and respiratory issues," included 13 studies (13%). Most studies (n = 54, 53%) were retrospective cohorts or case series; there were no clinical trials.

Despite the breadth of described comorbidities, studies focused on a narrow set of clinical topics. Further research is required to understand the prevalence, clinical impact, and interaction of the multiple comorbidities that are common in children with SNI.

Positive health outcomes have been observed following gastrostomy insertion in children with intellectual disability, which is being increasingly used at younger ages to improve nutritional intake. This study investigated the effect of gastrostomy insertion on survival of children with severe intellectual disability.

We used linked disability and health data of children and adolescents who were born in Western Australia between 1983 and 2009 to compare survival of individuals with severe intellectual disability by exposure to gastrostomy status. For those born in 2000-2009, we employed propensity score matching to adjust for confounding by indication. Effect of gastrostomy insertion on survival was compared by pertinent health and sociodemographic risk factors.

Compared with children born in the 1980s-1990s, probability of survival following first gastrostomy insertion for those born in 2000-2009 was higher (2 years: 94% vs. 83%). Mortality risk was higher in cases than that in their matched controls (hazard ratio 2.9, 95% confidence interval 1.1, 7.3). The relative risk of mortality (gastrostomy vs. non-gastrostomy) may have differed by sex, birthweight and time at first gastrostomy insertion. Respiratory conditions were a common immediate or underlying cause of death among all children, particularly among those undergoing gastrostomy insertion.

Whilst gastrostomy insertion was associated with lower survival rates than children without gastrostomy, survival improved with time, and gastrostomy afforded some protection for the more vulnerable groups, and earlier use appears beneficial to survival. Specific clinical data that may be used to prioritise the need for gastrostomy insertion may be responsible for the survival differences observed.

Feeding and swallowing disorders are prevalent in adults with Intellectual Disability (ID) and can potentially lead to discomfort, malnutrition, dehydration, aspiration, and choking. Most common interventions include: diet modification, compensatory strategies, swallowing therapy, and non-oral feeding. Despite their common use, the research evidence for these interventions is lacking. The current study aimed to systematically review the evidence for the safety and the effectiveness of interventions for feeding and swallowing disorders in adults with ID. Seven electronic databases, conference proceedings, and reference lists of relevant studies were reviewed from online availability to March 2019, with no language restrictions. Eligibility criteria encompassed experimental or non-experimental study design, adults (> 18 years) with ID and feeding and/or swallowing disorders (any etiology and severity) and any intervention for feeding and/or swallowing disorders. Methodological quality was assessed by two independent reviewers using the Downs and Black checklist. Four articles met the inclusion criteria. All included studies considered enteral feeding as an intervention strategy and had a retrospective observational design. Overall, included studies reported positive change in nutritional status and a high incidence of adverse events following enteral feeding initiation. Risk of bias was high with variability in methodological quality. The safety and effectiveness of interventions for feeding and swallowing in adults with ID is unclear. This review highlights the lack of evidence-based practice in this area. Directions for further research are provided. Before enteral feeding initiation, risks and benefits should be appropriately balanced on an individual basis, and caregivers should be involved in the decision-making process.

Children with neurologic impairment (NI) often undergo feeding tube placement for undernutrition or aspiration. We evaluated survival and acute health care use after tube placement in this population.

This is a population-based exposure-crossover study for which we use linked administrative data from Ontario, Canada. We identified children aged 13 months to 17 years with a diagnosis of NI undergoing primary gastrostomy or gastrojejunostomy tube placement between 1993 and 2015. We determined survival time from procedure until date of death or last clinical encounter and calculated mean weekly rates of unplanned hospital days overall and for reflux-related diagnoses, emergency department visits, and outpatient visits. Rate ratios were estimated from negative binomial generalized estimating equation models adjusting for time and age.

Two-year survival after feeding tube placement was 87.4% (95% confidence interval [CI]: 85.2%-89.4%) and 5-year survival was 75.8% (95% CI: 72.8%-78.4%). The adjusted rate ratio comparing weekly rates of unplanned hospital days during the 2 years after versus before tube placement was 0.92 (95% CI: 0.57-1.48). Similarly, rates of reflux-related hospital days, emergency department visits, and outpatient visits were unchanged. Unplanned hospital days were stable within subgroups, although rates across subgroups varied.

Mortality is high among children with NI after feeding tube placement. However, the stability of health care use before and after the procedure suggests that the high mortality may reflect underlying fragility rather than increased risk from nonoral feeding. Further research to inform risk stratification and prognostic accuracy is needed.

Percutaneous endoscopic gastrostomy (PEG) is the standard for placing gastrostomy in children needing long-term enteral nutrition, with major and minor complications reported in up to 19% and 47.7% of children, respectively. We reviewed our experience with PEG, concentrating on the efficacy of antibiotic prophylaxis in reducing infectious complications.

We performed a retrospective, single-centre study that comprised all children up to 18 years of age who underwent a first PEG procedure in the VU University Medical Centre, Amsterdam, from 2008 to 2012. All complications up to one month after PEG were recorded. Infection rates with and without antibiotic prophylaxis could be compared as a new protocol requiring the preprocedure administration of cefazolin was not followed consistently.

We enrolled 129 patients (78 male) with a mean age of 4.9 ± 4.8 years and median age of 2.9 years. Major complications were seen in seven patients (5.4%) and minor complications in 23 patients (17.8%). Antibiotic prophylaxis was administered to 99 of 129 children (76.7%). Infections occurred in 15 of 129 patients (11.6%); 14 of 99 with and 1 of 30 without prophylaxis developed infections (p = 0.106). Peristomal infections were the most frequent complication (10.1%).

Percutaneous endoscopic gastrostomy was a safe procedure and antibiotic prophylaxis did not seem to decrease infectious complications.

We compare the outcomes of fundoplication with gastrostomy vs gastrostomy alone and review the need for subsequent fundoplication after the initial gastrostomy alone.

We searched studies published from 1969 to 2016 for comparative outcomes of concomitant fundoplication with gastrostomy (FGT) vs gastrostomy insertion alone (GT) in children. Gastrostomy methods included open, laparoscopic, and endoscopic procedures. Primary aims were minor and major complications. Secondary aims included post-operative reflux-related complications, fundoplication specific complications, and need for subsequent fundoplication after GT.

We reviewed 447 studies; 6 observational studies were included for meta-analysis, encompassing 2730 children undergoing GT (n = 1745) or FGT (n = 985). FGT was associated with more minor complications [19.9 vs 11.4%, OR 2.02, 95% confidence interval (CI) 1.43-2.87, p ≤ 0.0001, I ² = 0%], minor complications requiring revision (6.8 vs 3.0%, OR 2.27, 95% CI 1.28-4.05, p = 0.005, I ² = 0%), and more overall complications (21.3 vs 12.0%, OR 1.99, 95% CI 1.43-2.78, p < 0.0001, I ² = 0%). Incidence of major complications (1.8 vs 2.0%, OR 1.39, 95% CI 0.62-3.11, p = 0.42, I ² = 5%) and reflux-related complications (8.8 vs 10.3%, OR 0.75, 95% CI 0.35-1.68, p = 0.46, I ² = 0%) in both groups was similar. Incidence of subsequent fundoplication in GT patients was 8.6% (mean).

Gastrostomy alone is associated with fewer minor and overall complications. Concomitant fundoplication does not significantly reduce reflux-related complications. As few patients require fundoplication after gastrostomy, current evidence does not support concomitant fundoplication.

Uncertainty exists about the impacts of feeding tubes on neurologically impaired children. Core outcome sets (COS) standardize outcome selection, definition, measurement, and reporting.

To synthesize an evidence base of qualitative data on all outcomes selected and/or reported for neurologically impaired children 0 to 18 years living with gastrostomy/gastrojejunostomy tubes.

Medline, Embase, and Cochrane Register databases searched from inception to March 2014.

Articles examining health outcomes of neurologically impaired children living with feeding tubes.

Outcomes were extracted and assigned to modified Outcome Measures in Rheumatology 2.0 Filter core areas; death, life impact, resource use, pathophysiological manifestations, growth and development.

We identified 120 unique outcomes with substantial heterogeneity in definition, measurement, and frequency of selection and/or reporting: "pathophysiological manifestation" outcomes (n = 83) in 79% of articles; "growth and development" outcomes (n = 13) in 55% of articles; "death" outcomes (n = 3) and "life impact" outcomes (n = 17) in 39% and 37% of articles, respectively; "resource use" outcomes (n = 4) in 14%. Weight (50%), gastroesophageal reflux (35%), and site infection (25%) were the most frequently reported outcomes.

We were unable to investigate effect size of outcomes because quantitative data were not collected.

The paucity of outcomes assessed for life impact, resource use and death hinders meaningful evidence synthesis. A COS could help overcome the current wide heterogeneity in selection and definition. These results will form the basis of a consensus process to produce a final COS.

Eating and swallowing impairments often get worse as patients with severe cerebral palsy (CP) get older, creating increased demand for percutaneous endoscopic gastrostomy (PEG) tube placement. Here we investigated the feasibility, safety, adverse events (AEs) and outcomes of PEG in adult CP.

We performed a retrospective study of 26 consecutive severe adult (age: 28 [19-48] yrs) CP patients who underwent pull-PEG tube placement under general anesthesia between 2005 and 2012 (median follow-up: 23 [6-64] months) at the same tertiary hospital centre.

The procedure was a technical success for 19 patients (BMI: 13.8 [10.7-21.4]) with (n = 11) or without (n = 8) previous respiratory disorder. Indications were mainly swallowing disorders (n = 14) and inadequate oral intake (n = 8). Early AEs were 7 transient oxygen needs, 3 local wound infections and 2 transient ileus. Long-term AEs were 9 non-severe gastrostomy incidents. There was no significant improvement in neurological status but respiratory function was improved in 6 patients and enteral nutrition enabled a significant median weight gain of 4.2 [1-8.8] kg (P < 0.01). Quality-of-life assessed by relatives and the healthcare team was improved in 13/16 and 13/15 cases respectively. AEs and outcomes did not differ significantly with previous respiratory disorder or nutritional status.

PEG tube placement is feasible in adult CP, although the risk of failure is increased by anatomical specificities. Previous respiratory disorders and undernourishment did not increase AE rates or modify outcomes. There were positive changes over time for nutritional status and perceived quality-of-life, but no neurological improvement.

Rett syndrome is one of many severe neurodevelopmental disorders with feeding difficulties. In this study, associations between feeding difficulties, age, MECP2 genotype, and utilization of gastrostomy were investigated. Weight change and family satisfaction following gastrostomy were explored. Data from the longitudinal Australian Rett Syndrome Database whose parents provided data in the 2011 family questionnaire (n=229) were interrogated. We used logistic regression to model relationships between feeding difficulties, age group, and genotype. Content analysis was used to analyze data on satisfaction following gastrostomy. In those who had never had gastrostomy and who fed orally (n=166/229), parents of girls<7 years were more concerned about food intake compared with their adult peers (odds ratio [OR] 4.26; 95% confidence interval [CI] 1.29, 14.10). Those with a p.Arg168 mutation were often perceived as eating poorly with nearly a 6-fold increased odds of choking compared to the p.Arg133Cys mutation (OR 5.88; 95% CI 1.27, 27.24). Coughing, choking, or gagging during meals was associated with increased likelihood of later gastrostomy. Sixty-six females (28.8%) had a gastrostomy, and in those, large MECP2 deletions and p.Arg168 mutations were common. Weight-for-age z-scores increased by 0.86 (95% CI 0.41, 1.31) approximately 2 years after surgery. Families were satisfied with gastrostomy and felt less anxious about the care of their child. Mutation type provided some explanation for feeding difficulties. Gastrostomy assisted the management of feeding difficulties and poor weight gain, and was acceptable to families. Our findings are likely applicable to the broader community of children with severe disability.

There are few data on outcomes and mortality of patients who have received gastrostomies. We assessed 30-day and 1-year mortalities of patients in the United Kingdom who were referred to hospitals for gastrostomies and of patients who deferred this intervention.

We collected data from 1327 patients referred to 2 hospitals in Sheffield, United Kingdom, for gastrostomies from February 2004 through May 2010. Data were analyzed to determine 30-day and 1-year mortalities. Predicted mortality by using the validated Sheffield Gastrostomy Scoring System (SGSS) was then compared with actual mortality by using area under the receiver operator curves to determine levels of agreement in patients referred for gastrostomy.

Three hundred four patients (23%) did not undergo gastrostomy after multidisciplinary team discussion, which was based on physicians' recommendations. This group had 35.5% mortality at 30 days and 74.3% at 1 year, whereas mortality among patients who underwent gastrostomy (n = 1027) was 11.2% at 30 days and 41.1% at 1 year (P < .0001, compared with patients who deferred the procedure). The area under the receiver operator curves for the SGSS demonstrated acceptable agreement between predicted and actual mortality in patients who underwent or were deferred gastrostomy.

On the basis of data from 1327 patients, those who undergo gastrostomy have significantly lower mortality than those who defer the procedure. Without applying the SGSS, clinicians are able to select patients most likely to benefit from gastrostomy. The SGSS could provide objective support to clinicians involved in making ethically contentious or potentially litigious decisions.

Little is known about long-term outcomes of patients undergoing percutaneous endoscopic gastrostomy (PEG) placement. The purpose of this study was to examine tube-related major complications in pediatric patients undergoing PEG placement during a 10-year follow-up period.

A retrospective chart review of patients undergoing PEG placement from April 1999 through December 2000 at Boston Children's Hospital was performed. Cumulative incident rates of major complications (defined by additional hospitalization, surgical or interventional radiology procedures) as well as time between PEG placement and major complications were evaluated using Kaplan-Meier survival analysis. Time to elective tube removal and patient mortality was also assessed.

One hundred thirty-eight patients (59% [n = 82] boys [median age 22.5 months] [interquartile range, IQR 9-72.5], weight 9.2 kg [IQR 6.1-15.8]), underwent PEG placement during the study period and were followed at our hospital for a median of 4.98 years (IQR 1.5-8.7) years. Median time to elective tube removal was 10.2 years, with approximately half of the patients estimated to still have an indwelling enteral tube 10 years after placement. Fifteen patients (11%) had at least 1 major complication related to their gastrostomy tubes during the examined time period. The cumulative incidence of patients having a major complication was 15% (95% confidence interval 8.9-24.5) by 5.4 years.

Children undergoing PEG placement have a long-term high risk of morbidity related to enteral tubes. Major complications can occur many years after PEG placement. Larger prospective studies may be useful to assess risk factors for PEG-related complications in pediatrics.

Although gastrostomy tube insertion - whether endoscopic or open - is generally safe, procedure-related complications have been reported.

To compare gastrostomy tube insertion-related complications between percutaneous endoscopic gastrostomy and open gastrostomy at a single pediatric centre.

The charts of children (younger than 17 years of age at the time of tube insertion) who underwent endoscopic or open gastrostomy tube insertion from January 2005 to December 2007 at the Stollery Children's Hospital (Edmonton, Alberta) were examined.

A total of 298 children underwent gastrostomy tube insertion over a period of three years. After excluding patients with incomplete charts, 160 children (91 boys, mean [± SD] age 3.18 ± 4.73 years) were included. Eighty-five children (mean age 4.50 ± 5.40 years) had their gastrostomy tube inserted endoscopically, while the remaining 75 (mean age 1.68 ± 3.27 years; P<0.001) underwent an open procedure. The overall rate of major complications was 10.2% for the endoscopic technique and 8.6% for the open technique (P=0.1). Major infections were higher in the endoscopic technique group, while persistent gastrocutaneous fistulas after tube removal were more common in the open technique group.

Although the rate of major complications was similar between the endoscopic and open tube insertion groups, major infections were more common among children who underwent endoscopic gastrostomy. The decision for gastrostomy tube insertion was primarily based on clinical background.

Analyses of survival after fundoplication in childhood are often restricted to 30-day mortality, or to the neurologically impaired. The objective of this study was to report actuarial survival and variables associated with mortality for all children undergoing fundoplication.

This was a prospective observational study of fundoplication surgery by one surgeon; the endpoint was survival. Using a Cox proportional hazards model, gastrostomy, neurological status, tracheostomy, congenital cardiac disease, syndromic status, presence of congenital anomaly, other chronic disease, weight z-score at time of surgery, need for revisional fundoplication, use of laparoscopic surgery, gastric drainage procedures, age and sex were assessed for their influence on survival.

Two-hundred and thirty children underwent 255 fundoplications at a median age of 3·6 years. Forty-six children (20·0 per cent) died during a median follow-up of 2·8 (range 0·5-11·2) years. Statistical modelling showed gastrostomy (relative risk of death 11·04, P < 0·001), cerebral palsy (relative risk 6·58, P = 0·021) and female sex (relative risk 2·12, P = 0·015) to be associated with reduced survival. Revisional fundoplication was associated with improved survival (relative risk of death 0·37, P = 0·037). Survivors had significantly higher weight z-scores (-1·4 versus - 2·9 for those who died; P = 0·001). The 5-year survival rate after fundoplication for children with cerebral palsy and gastrostomy was 59 per cent.

Survival of children following fundoplication is related principally to the presence of a gastrostomy and neurological status. Estimates of children's life expectancy should take account of the poorer survival of neurologically impaired children who undergo fundoplication, presumably due to the related co-morbidities that lead to a gastrostomy.

To assess and analyse nutritional status in patients with systemic sclerosis (SSc) and identify possible associations with clinical symptoms and its prognostic value.

Body mass index (BMI) and parameters of bioelectrical impedance analysis (BIA) were assessed in 124 patients with SSc and 295 healthy donors and matched for sex, age and BMI for comparisons. In patients with SSc, BMI and BIA values were compared with clinical symptoms in a cross-sectional study. In a prospective open analysis, survival and changes in the nutritional status and energy uptake induced by nutritional treatment were evaluated.

Patients with SSc had reduced phase angle (PhA) values, body cell mass (BCM), percentages of cells, increased extracellular mass (ECM) and ECM/BCM values compared with healthy donors. Malnutrition was best reflected by the PhA values. Of the patients with SSc, 69 (55.7%) had malnutrition that was associated with severe disease and activity. As assessed by multivariate analysis, low predicted forced vital capacity and high N-terminal(NT)-proBNP values discriminated best between good and bad nutritional status. Among different clinical parameters, low PhA values were the best predictors for SSc-related mortality. BMI values were not related to disease symptoms or mortality. Fifty per cent of patients with SSc had a lower energy uptake related to their energy requirement, 19.8% related to their basal metabolism. Nutritional treatment improved the patients' nutritional status.

In patients with SSc, malnutrition is common and not identified by BMI. BIA parameters reflect disease severity and provide best predictors for patient survival. Therefore, an assessment of nutritional status should be performed in patients with SSc.

To study the outcomes from initiation of percutaneous endoscopic gastrostomy (PEG) feeding in young people with profound multiple disabilities.

Observations were made on 40 adults with lifelong intellectual disability (mental retardation) and quadriplegia, in whom PEG feeding was initiated during 1990-2008. There were 20 men and 20 women aged 15-40 years at the time of the audit, living in settings with 24 h registered nurse staffing.

Undernutrition and recurrent aspiration with frequent infections were cited as reasons for PEG feeding. The positive outcomes were that some were said to be more alert for a time following the procedure; and these young adults lived with PEG feeding for an average of 8.5 years, some up to 18 years. In that time, however, they all experienced complications of the PEG insertion, and of the PEG feeding process. There were no measurable improvements in cognition. There were no reductions in prescription of medications. They all required frequent daily interventions by nurses to maintain medical stability. Ten people died during this review period, from continued deterioration in neurological status, with pneumonia cited as the terminal event.

Unlike other people with neurological deterioration, young adults with lifelong multiple disabilities may live for many years with PEG feeding. There is little gain in quality of life.

To develop a North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition (NASPGHAN) and European Society for Pediatric Gastroenterology, Hepatology, and Nutrition (ESPGHAN) international consensus on the diagnosis and management of gastroesophageal reflux and gastroesophageal reflux disease in the pediatric population.

An international panel of 9 pediatric gastroenterologists and 2 epidemiologists were selected by both societies, which developed these guidelines based on the Delphi principle. Statements were based on systematic literature searches using the best-available evidence from PubMed, Cumulative Index to Nursing and Allied Health Literature, and bibliographies. The committee convened in face-to-face meetings 3 times. Consensus was achieved for all recommendations through nominal group technique, a structured, quantitative method. Articles were evaluated using the Oxford Centre for Evidence-based Medicine Levels of Evidence. Using the Oxford Grades of Recommendation, the quality of evidence of each of the recommendations made by the committee was determined and is summarized in appendices.

More than 600 articles were reviewed for this work. The document provides evidence-based guidelines for the diagnosis and management of gastroesophageal reflux and gastroesophageal reflux disease in the pediatric population.

This document is intended to be used in daily practice for the development of future clinical practice guidelines and as a basis for clinical trials.

Growth failure and undernutrition complicate the clinical course of girls with Rett syndrome (RTT). These abnormalities are, in part, the consequence of oral motor dysfunction and inadequate dietary intake.

To determine whether gastrostomy placement for nutritional therapy alters the natural history of growth failure and undernutrition in RTT.

We hypothesized that gastrostomy placement for nutritional therapy reverses the decline in height, weight, and body mass index (BMI) z scores in RTT.

Standard stadiometric and anthropometric measures were obtained to derive height, weight, and BMI z scores and estimates of fat-free mass (FFM) and body fat in a cohort of girls (n = 92) with RTT before and after gastrostomy placement. Methyl-CpG-binding protein 2 (MECP2) mutations and the presence or absence of a fundoplication were recorded.

The differences in height (n = 73), weight (n = 81), and BMI (n = 81) z score slopes before and after gastrostomy placement were 1.31 + 2.06 (P < 0.001), 2.38 +/- 3.18 (P < 0.001), and 3.25 +/- 3.32 (P < 0.001), respectively. FFM and body fat (n = 43) increased after gastrostomy by 41 +/- 27 g/cm height (P < 0.001) and 7.5% +/- 5.7% body weight (P < 0.001), respectively. The differences in height, weight, and BMI z score slopes were similar regardless of the age at which the gastrostomy was placed. The differences in height, weight, and BMI z score slopes, as well as the change in FFM and body fat deposition after gastrostomy placement, did not differ between those who did or did not have a fundoplication and among the classes of MECP2 mutations.

Gastrostomy placement for aggressive nutritional therapy favorably altered the natural history of growth failure and undernutrition in RTT, but did not restore height and weight z scores to birth values, regardless of the age at which surgery occurred and in the presence or absence of a fundoplication.

Percutaneous endoscopic gastrostomy has been a valuable tool in nutritional rehabilitation since its inception in 1980. Although it was originally described in children, a large sector of the adult population is dependent on it for nutritional support. Percutaneous endoscopic gastrostomy tube insertion is generally a safe procedure. Nevertheless, variable incidence rates of complications have been reported. The present review highlights the up-to-date indications, contraindications and complications of percutaneous endoscopic gastrostomy in children, along with a discussion of issues that need further exploring through future research.

Feeding access and associated antireflux procedures continue to be some of the most common operations performed in pediatric patients. This review will discuss the various feeding access procedures available, including minimally invasive techniques, and further elaborate on appropriate indications for a concurrent antireflux procedure as well as alternatives to fundoplication.

Gastrostomy and jejunostomy can be successfully placed using endoscopic or laparoscopic techniques with low complication rates. Nissen fundoplication is well described laparoscopically but failure with recurrent gastroesophageal reflux has resulted in the development of other operative alternatives.

Decisions concerning appropriate long-term feeding access must be individualized, understanding the advantages and disadvantages of gastrostomy and jejunostomy techniques. Laparoscopic Nissen fundoplication is successful for treatment of patients who fail medical therapy of gastroesophageal reflux, but recurrent gastroesophageal reflux is a persistent problem that requires innovative solutions.