Dumping syndrome following Nissen fundoplication, diagnosis, and treatment

In a Setting of Esophageal Replacement, Total Gastric Pull-Up has Fewer Complications than Partial Gastric Pull-Up

AIM

The main indications for an esophageal replacement (ER) are unresolved complex esophageal atresia (EA) and caustic strictures (CS). The use of different organs for replacement has been described. When the stomach is chosen, there are two ways to do a gastric pull-up: a partial (PGP) or a total pull-up (TGP). Few studies have been published comparing the different techniques. The aim of this study was to compare the outcomes of patients who underwent ER by PGP or by TGT.

METHODS

The medical records of all patients who underwent gastric pull-up for ER in the last 18 years at the National Pediatric Hospital Prof. Dr. Juan P. Garrahan were reviewed. The study is comparative, retro-prospective and longitudinal. Patients were divided in two groups according to the ER technique (PGP or TGP). We compared the following outcomes: duration of the operation, days of hospitalization in the intensive care unit (ICU), days of total hospitalization, time to initiation of oral feedings and rate of anastomosis dehiscence, incidence of anastomotic stenosis, need for re-operations, incidence of gastroesophageal reflux disease (GERD), incidence of tracheo-esophageal fistulas (TEF), incidence of dumping syndrome, incidence of gastric necrosis and mortality.

RESULTS

There were 92 patients included in the study: 70 in the PGP group (76%) and 26 in the TGP group (24%). The two groups were demographically equivalent. Patients in the TGP group had a statistically significant lower incidence of anastomotic dehiscence (22,7% versus 54,3%; p = 0.01) and dumping syndrome (13,6% versus 37,1%; p = 0.038). Patients in the TGP had lower incidence of anastomotic stenosis, although the difference was not statistically significant. There were no statistically significant differences between the groups in terms of duration of the operation, postoperative days in the ICU, time to oral feedings, GERD, TEF or overall hospital stay. There were no cases of gastric necrosis. There were 3 deaths in the PGP group and one in the TGP group.

CONCLUSIONS

We observed benefits in the TGP group versus the PGP approach in terms of anastomotic dehiscence and dumping syndrome, as well as a trend toward a lower incidence of anastomotic stenosis. Based on this experience, we recommend the TGP approach for patients who need an esophageal replacement by a gastric pull-up.

LEVELS OF EVIDENCE

According to the Journal of Pediatric Surgery this research corresponds to type of study level III for retrospective comparative study.

Dumping Syndrome in Children: A Narrative Review

Dumping syndrome (DS) is a typical side effect of stomach surgery, which includes cancer, non-cancer esophageal and gastric surgery, and bariatric surgery. It is marked by the fast evacuation of undigested food from the stomach into the small intestine, which causes a variety of symptoms. Early dumping symptoms include gastrointestinal symptoms such as stomach discomfort, diarrhea, and nausea, as well as vasomotor symptoms such as drowsiness and face flushing, and occur within the first hour following a meal. Late dumping symptoms appear one to three hours after a meal and are related to reactive hypoglycemia, resulting in hypoglycemia, sweating, palpitations, and confusion. Early dumping pathophysiology involves abnormalities in stomach structure and function, which result in rapid transit of stomach contents to the duodenum, insufficient digestion, and fluid transfers from the vascular compartment to the intestine. Late dumping occurs as a result of hyperinsulinemia caused by the fast passage of undigested foods to the gut. Symptom-based questionnaires and diagnostic testing such as plasma glucose measurement and stomach emptying studies can be used to confirm a diagnosis of DS. The primary approach to managing DS is dietary modifications, including eating smaller, more frequent meals and avoiding high glycemic index carbohydrates. Dietary supplements and medications may be used to slow down gastric emptying or control blood glucose levels. Pharmacological options include alpha-glycosidase inhibitors, somatostatin analogs, glucagon-like peptide-1 analogs, and sodium-glucose cotransporter inhibitors. In severe cases, refractory to conservative measures, surgical interventions may be considered. DS can arise in children following gastric surgery for obesity or corrective surgery for congenital abnormalities. It is frequently misdiagnosed and can have serious implications, such as hypoglycemia-related cognition deficits. Screening and early identification using glucose tolerance testing and continuous glucose monitoring (CGM) are critical in at-risk youngsters. Children's treatment techniques are similar to those used in adults, with dietary changes and medication therapies serving as the cornerstone of care. Overall, DS is a complex condition that requires a multidisciplinary approach to diagnosis and management. Further research is needed to improve understanding of its pathophysiology and optimize treatment strategies, particularly in children. This review aims to provide a well-rounded informative summary of the most recent literature on the under-recognized clinical and scientific aspects of DS among the children age group. It incorporates the quality of life, pathophysiology, diagnosis, prevalence, and treatment.

Fundoplication in children with esophageal atresia: preoperative workup and outcome

Up to 45% of esophageal atresia (EA) patients undergo fundoplication during childhood. Their esophageal dysmotility may predispose to worse fundoplication outcomes compared with patients without EA. We therefore compared fundoplication outcomes and symptoms pre- and post-fundoplication in EA patients with matched patients without EA. A retrospective review of patients with- and without EA who underwent a fundoplication was performed between 2006 and 2017. Therapeutic success was defined as complete sustained resolution of symptoms that were the reason to perform fundoplication. Fundoplication indications of 39 EA patients (49% male; median age 1.1 [0.1-17.0] yrs) and 39 non-EA patients (46% male; median age 1.3 [0.3-17.0] yrs) included respiratory symptoms, brief resolved unexplained events, typical symptoms of gastroesophageal reflux disease, recurrent strictures and respiratory problems. Post-fundoplication, therapeutic success was achieved in 5 (13%) EA patients versus 29 (74%) non-EA patients (P<0.001). Despite therapeutic success, all 5 (13%) EA patients developed postoperative sustained symptoms/complications versus 12 (31%) non-EA patients. Eleven (28%) EA patients versus 3 (8%) non-EA patients did not achieve any therapeutic success (P=0.036). Remaining patients achieved partial therapeutic success. EA patients suffered significantly more often from postoperative sustained dysphagia (41% vs. 13%; P=0.039), gagging (33% vs. 23%; P<0.001) and bloating (40% vs. 17%; P=0.022). Fundoplication outcomes in EA patients are poor and EA patients are more susceptible to post-fundoplication sustained symptoms and complications compared with patients without EA. The decision to perform fundoplication in EA patients with proven gastroesophageal reflux disease needs to be made with caution after thorough multidisciplinary evaluation.

Continuous Glucose Monitoring to Diagnose Hypoglycemia Due to Late Dumping Syndrome in Children After Gastric Surgeries

Gastrostomy tubes (G-tubes) and Nissen fundoplication are common surgical interventions for feeding difficulties and gastroesophageal reflux disease in children. A potential yet often missed, complication of these procedures is dumping syndrome. We present 3 pediatric patients with postprandial hypoglycemia due to late dumping syndrome after gastric surgeries. All patients received gastrostomy tubes for feeding intolerance: 2 had Nissen fundoplication for gastroesophageal reflux disease, and 1 had tracheoesophageal repair. All patients underwent multiple imaging studies in an to attempt to diagnose dumping syndrome. Continuous glucose monitoring (CGM) was essential for detecting asymptomatic hypoglycemia and glycemic excursions occurring with feeds that would have gone undetected with point-of-care (POC) blood glucose checks. CGM was also used to monitor the effectiveness of treatment strategies and drive treatment plans. These cases highlight the utility of CGM in diagnosing postprandial hypoglycemia due to late dumping syndrome, which is infrequently diagnosed by imaging studies and intermittent POC blood glucose measurements.

Risk factors of dumping syndrome after fundoplication for gastroesophageal reflux in children

PURPOSE

In postoperative cases of fundoplication, the gastric emptying ability is promoted and sometimes exhibits dumping syndrome. Dumping syndrome often goes unrecognized in children. Furthermore, the risk factors for postoperative dumping syndrome are unknown. This study aimed to investigate the risk factors of developing dumping syndrome after fundoplication.

METHODS

A retrospective chart review of all consecutive patients between January 2003 and March 2018 (190 patients) who had fundoplication at our clinic was conducted. Regarding the risk factors of dumping syndrome, gender, age and body weight at the time of surgery, neurological impairment, severe scoliosis, microgastria, chromosomal abnormalities, complex cardiac anomalies, gastrostomy, and laparoscopic surgery were retrospectively studied.

RESULTS

17 patients (9%) developed dumping syndrome post-operatively. Multivariate analysis showed that significant risk factors for dumping syndrome included: undergoing surgery within 12 months of age (adjusted OR 10.3, 95% CI 2.6-45.2), severe scoliosis (adjusted OR 19.3, 95% CI 4.4-91.1), and microgastria (adjusted OR 26.5, 95% CI 1.4-896.4).

CONCLUSIONS

We identified that: age at fundoplication being within 12 months of age, severe scoliosis, and microgastria were risk factors for dumping syndrome after fundoplication, and that this information should be explaining to the family before conducting the fundoplication.

Frequency of Abnormal Glucose Tolerance Test Suggestive of Dumping Syndrome Following Oesophageal Atresia Repair

OBJECTIVES

Dumping syndrome (DS) is mostly described as a complication of antireflux surgery in oesophageal atresia (OA) but we previously reported 2 cases of DS before any other surgery in infants operated at birth for OA. The objectives of the present study were to assess the prevalence of abnormal oral glucose tolerance test (OGTT) at 3 months of age in infants operated at birth with type C OA, to describe symptoms and clinical features, and to assess risk factors in infants presenting with abnormal OGTT suggestive of DS.

METHODS

A prospective case series study including infants with type C OA without fundoplication, born between 2013 and 2016 in 8 centres was conducted. An OGTT was performed between 2.5 and 3.5 months. Abnormal OGTT was defined as early hyperglycaemia (>1.8 g/L until 30 minutes; >1.7 g/L between 30 minutes and 2 hours; and >1.4 g/L between 2 and 3 hours) and/or late hypoglycaemia (<0.6 g/L after 2 hours).

RESULTS

Eleven of the 38 OGTT (29%) showed abnormalities. None of the patients' demographics (birth weight, sex, prematurity, associated malformation, use of enteral nutrition) or conditions of the surgery tested was associated with abnormal OGTT. No clinical sign was specific for it.

CONCLUSIONS

DS should be considered in every infant operated at birth for OA presenting with digestive symptoms. No risk factor was predictive for abnormal OGTT. An OGTT to screen for potential DS around 3 months of age should be considered in infants born with EA.

CLINICAL TRIAL NAME AND REGISTRATION NUMBER

DUMPING NCT02525705.

Post-Prandial Hyperinsulinaemic Hypoglycaemia after Oesophageal Surgery in Children

INTRODUCTION

Post-prandial hyperinsulinaemic hypoglycaemia (PPHH) is a recognized complication of various gastric surgeries in children, but rarely reported after oesophageal atresia repair. We report 2 children diagnosed with PPHH after oesophageal surgery and the challenges of their management. Case 1: A 2-year-old boy diagnosed with oesophageal atresia at birth was surgically repaired requiring 6 oesophageal dilatations in the first year of life. At 11 months of age, he manifested hypoglycaemic seizures and investigations confirmed PPHH. Acarbose and diazoxide trials failed. He was managed with 17-h continuous gastrostomy feeds. Currently, he is 28 months old with euglycaemia on daytime bolus gastrostomy feeds and overnight 12-h continuous gastrostomy feeds. Case 2: A 6-month-old girl diagnosed with Wolf-Hirschhorn syndrome and tracheo-oesophageal fistula was surgically repaired, requiring monthly oesophageal dilatations. At 5 months of age, she was reported to have hypoglycaemia and PPHH was confirmed. She responded to diazoxide and continuous nasogastric tube feeds, but developed pulmonary hypertension pos-sibly diazoxide-induced. Subsequently, diazoxide was stopped and normoglycaemia was secured via 20-h continuous gastrostomy feeds.

CONCLUSION

PPHH may be an underdiagnosed complication in children undergoing surgery for oesophageal atresia. These children must be monitored closely for symptoms of hypoglycaemia and if there are concerns must be screened for possible PPHH. Our cases demonstrate that continuous feeding regimens might be the only therapeutic option, until PPHH gradually lessens in intensity over time.

Gastroesophageal Reflux Disease and Aerodigestive Disorders

This relationship between gastroesophageal reflux and airway disorders is complex, possibly bidirectional, and not clearly defined. The tools used to investigate gastroesophageal reflux are mostly informative about involvement of gastroesophageal reflux within the gastrointestinal tract, although they are often utilized to study the relationship between gastroesophageal reflux and airway issues with are suspected to occur in relation to reflux. These modalities often lack specificity for reflux-related airway disorders. Co-incidence of gastroesophageal reflux and airway disorders does not necessarily infer causality. While much of our focus has been on managing acidity, controlling refluxate is an area that has not been traditionally aggressively pursued. Our management approach is based on some of the evidence presented, but also often from a lack of adequate study to provide further guidance.

Idiopathic postprandial hyperinsulinaemic hypoglycaemia

BACKGROUND

Idiopathic postprandial hyperinsulinaemic hypoglycaemia (PPHH) has rarely been reported in the paediatric age. The objective of this study was to describe the clinical characteristics, diagnosis and management in a group of children with PPHH.

METHODS

Six children (three females) with a mean follow-up of 3.5±3.0 years at a single tertiary paediatric hospital. All had 24-h blood glucose monitoring, diagnostic fast and prolonged oral glucose tolerance test (OGTT). Follow-up included: 24-h blood glucose monitoring or continuous glucose monitoring system, prolonged OGTT and/or mixed meal (MM) test.

RESULTS

Age at diagnosis ranged from 5.4 to 15.7 years and auxology parameters were within normal range in all subjects. All the children had a normal fasting tolerance for age. Prolonged OGTT demonstrated symptomatic hypoglycaemia after 120 min in all the patients with simultaneous detectable serum insulin concentration. Acarbose was tried in three patients, having a positive effect on glycaemic and symptom control, but due to side effects, only two patients continued acarbose in the long run. Diazoxide proved to be beneficial in one patient. The rest of the patients were managed with frequent feeds but despite this, prolonged OGTT/MM demonstrated on-going PPHH.

CONCLUSIONS

Prolonged OGTT is necessary to diagnose PPHH in children. Acarbose is beneficial in children with PPHH, although not well tolerated. Patients managed exclusively on frequent feeds demonstrated persistent hypoglycaemia on OGTT. The underlying cause of the PPHH in these patients remains unknown.

Hyperinsulinemic Hypoglycemia - The Molecular Mechanisms

Under normal physiological conditions, pancreatic β-cells secrete insulin to maintain fasting blood glucose levels in the range 3.5-5.5 mmol/L. In hyperinsulinemic hypoglycemia (HH), this precise regulation of insulin secretion is perturbed so that insulin continues to be secreted in the presence of hypoglycemia. HH may be due to genetic causes (congenital) or secondary to certain risk factors. The molecular mechanisms leading to HH involve defects in the key genes regulating insulin secretion from the β-cells. At this moment, in time genetic abnormalities in nine genes (ABCC8, KCNJ11, GCK, SCHAD, GLUD1, SLC16A1, HNF1A, HNF4A, and UCP2) have been described that lead to the congenital forms of HH. Perinatal stress, intrauterine growth retardation, maternal diabetes mellitus, and a large number of developmental syndromes are also associated with HH in the neonatal period. In older children and adult's insulinoma, non-insulinoma pancreatogenous hypoglycemia syndrome and post bariatric surgery are recognized causes of HH. This review article will focus mainly on describing the molecular mechanisms that lead to unregulated insulin secretion.

Postprandial Hypoglycemia in Children after Gastric Surgery: Clinical Characterization and Pathophysiology

BACKGROUND/AIMS

Dumping syndrome is a common complication in children after fundoplication and other gastric surgeries and is characterized by postprandial hypoglycemia (PPH). Children with PPH have an exaggerated GLP-1 response to a meal with an exaggerated insulin surge and subsequent hypoglycemia. We evaluated the role of GLP-1 in the pathogenesis of PPH by examining the effects of GLP-1 receptor blockade on glucose and insulin response to a meal.

METHODS

Six children with known PPH after surgery underwent a mixed meal tolerance test with/without the GLP-1 receptor antagonist exendin-(9-39) using an open-label crossover design.

RESULTS

Average nadir plasma glucose concentration was ≥65 mg/dl in all treatment conditions; however, 3 out of the 6 subjects had a nadir plasma glucose <65 mg/dl during vehicle infusion, while only 1 out of the 6 had a nadir plasma glucose <65 mg/dl during infusion of exendin-(9-39). Exendin-(9-39) suppressed postmeal insulin concentrations when compared to vehicle, with a lower peak insulin concentration observed in the children who received 500 pmol/kg/min of exendin-(9-39) (131.3 ± 125.1 pmol/l) compared to children who received 300 pmol/kg/min (231.1 ± 153.4 pmol/l) or vehicle (259.7 ± 120.2 pmol/l). Gastric emptying was not different between groups.

CONCLUSION

Our results suggest that the exaggerated insulin response to a meal is at least in part due to the effects of GLP-1 on the pancreatic β-cell and suggest that GLP-1 receptor antagonists may represent a potential avenue of treatment for children with PPH.

[Dumping syndrome following gastric surgery]

BACKGROUND

Dumping syndrome is the term used to describe a common set of symptoms following gastric surgery, and is characterised by postprandial discomfort which can entail nutritional problems. The condition was well known when surgery was the usual treatment for peptic ulcer disease. The increasing number of operations for morbid obesity means that the condition is once again of relevance, and health personnel will encounter these patients in different contexts. This article discusses the prevalence, symptomatology and treatment of dumping syndrome.

MATERIAL AND METHOD

This review article is based on a selection of articles identified in PubMed and assessed as having particular relevance for elucidating this issue, as well as on the authors' own clinical experience.

RESULTS

Early dumping syndrome generally occurs within 15 minutes of ingesting a meal and is attributable to the rapid transit of food into the small intestine. Nausea, abdominal pain, diarrhoea, a sensation of heat, dizziness, reduced blood pressure and palpitations are typical symptoms. Lethargy and sleepiness after meals are common. Late dumping syndrome occurs later and may be attributed to hypoglycaemia with tremors, cold sweats, difficulty in concentrating, and loss of consciousness. Dumping-related symptoms occur in between 20 and 50% of patients following gastric surgery. Early dumping syndrome is more frequent than late dumping syndrome. It is estimated that 10-20% of patients have pronounced symptoms and 1-5% have severe symptoms. The diagnosis is usually made on the basis of typical symptoms. Most patients experience alleviation of the symptoms over time and with changes in diet and eating habits. Further patient evaluation and drug or surgical intervention may be relevant for some individuals.

INTERPRETATION

Dumping-related symptoms are common after gastric surgery. The extent of obesity surgery in particular means that health personnel should be familiar with this condition.

Chromosome 6q24 transient neonatal diabetes mellitus and protein sensitive hyperinsulinaemic hypoglycaemia

AIM

We describe the novel clinical observation of protein induced hyperinsulinaemic hypoglycaemia following remission of transient neonatal diabetes mellitus (TNDM) in a patient with 6q24 methylation defect.

METHODS

A male infant of non-consanguineous Caucasian parents, born at 40 weeks of gestation with a birth weight of 3330 g (-0.55 standard deviation score) presented with hyperglycaemia in the first week of life and was diagnosed with 6q24 TNDM. At 22 months of age, he developed recurrent hypoglycaemic episodes. Controlled diagnostic fast, oral glucose tolerance test, protein loading test and mixed meal tolerance test were undertaken. Sequencing of ABCC8, KCNJ11, GLUD1 and HADH were performed.

RESULTS

Investigations suggested a diagnosis of protein sensitive hyperinsulinaemic hypoglycaemia with normal serum ammonia, acylcarnitine profile and urine organic acids. Sequencing of ABCC8, KCNJ11, GLUD1 and HADH did not identify a pathogenic mutation to explain his hyperinsulinaemic hypoglycaemia.

CONCLUSION

This clinical case demonstrates the novel observation of protein sensitive hyperinsulinaemic hypoglycaemia in a patient with 6q24 TNDM. Long-term follow-up of patients with chromosome 6q24 TNDM is warranted following remission.

Continuous glucose monitoring for suspected dumping syndrome in infants after Nissen fundoplication

Dumping syndrome is infrequently reported, but known to occur after Nissen fundoplication in children. However, it may be difficult both to diagnose and manage. Here we presented four infants who received Nissen fundoplication for severe gastroesophageal reflux disease, two of whom developed dumping syndrome whilst the other two did not. Continuous glucose monitoring (CGM) was very useful to clearly detect large glycemic fluctuation around each feeding. CGM was also helpful to prove the effect of treatment to avoid abnormal glucose levels. We believe that dumping syndrome in children may be underdiagnosed if clinicians rely solely on the recognition of symptoms or limited frequency of blood samplings. CGM might be the most sensitive diagnostic tool.

Hyperinsulinaemic hypoglycaemia:genetic mechanisms, diagnosis and management

Hyperinsulinaemic hypoglycaemia (HH) is characterized by unregulated insulin secretion from pancreatic β-cells. Untreated hypoglycaemia in infants can lead to seizures, developmental delay, and subsequent permanent brain injury. Early identification and meticulous managementof these patients is vital to prevent neurological insult. Mutations in eight different genes (ABCC8, KCNJ11, GLUD1, CGK, HADH, SLC16A1, HNF4A and UCP2) have been identified to date in patients with congenital forms of hyperinsulinism (CHI). The most severe forms of CHI are due to mutations in ABCC8 and KCJN11, which encode the two components of pancreatic β-cell ATP-sensitive potassium channel. Recent advancement in understanding the genetic aetiology, histological characterisation into focal and diffuse variety combined with improved imaging (such as fluorine 18 L-3, 4-dihydroxyphenylalanine positron emission tomography 18F-DOPA-PET scanning) and laparoscopic surgical techniques have greatly improved management. In adults, HH can be due to an insulinoma, pancreatogenous hypoglycaemic syndrome, post gastric-bypass surgery for morbid obesity as well as to mutations in insulin receptor gene. This review provides an overview of the molecular basis of CHI and outlines the clinical presentation, diagnostic criteria, and management of these patients.

Nissen fundoplication in children with cerebral palsy: influence on rate of gastric emptying and postprandial symptoms in relation to protein source in caloric liquid meals

BACKGROUND & AIMS

The aim was to study the influence of Nissen fundoplication on rate of gastric emptying and postprandial symptoms in relation to protein source in liquid meals in children with cerebral palsy.

METHODS

Ten children with cerebral palsy and Nissen fundoplication and ten with cerebral palsy without Nissen fundoplication were studied. Patients had gastrostomy and received two meals, double-blinded, in random order, on separate days. Meals contained a standardised carbohydrate and fat base plus one of two protein modules (Meal A: 100% casein; Meal B: 40% casein/60% whey). The (13)C octanoic acid breath test was used to assess gastric emptying. Postprandial symptoms were recorded. Results are given as median.

RESULTS

For meal A and B, respectively, time until 50% of the meal had emptied (T1/2) was 110 in the Nissen fundoplication- and 181 min in the non-Nissen fundoplication group, (p = 0.35) and 50 and 85 min (p = 0.25). Seven in the Nissen fundoplication group reported postprandial symptoms to meal B, none in the non-Nissen fundoplication group (p < 0.01).

CONCLUSIONS

Compared with cerebral palsy-children without Nissen fundoplication, those with Nissen fundoplication have postprandial symptoms more frequently after receiving a rapid emptying meal. Gastric emptying alone, however, does not seem to explain the symptom occurrence. ClinicalTrials.gov: UUSKBK 28200706.

Pureed by gastrostomy tube diet improves gagging and retching in children with fundoplication

BACKGROUND

Children with feeding disorders requiring Nissen fundoplication may develop gagging and retching following gastrostomy feedings. We developed a "pureed by gastrostomy tube" (PBGT) diet in an attempt to treat these symptoms and provide adequate nutrition and hydration.

METHODS

Children post- fundoplication surgery with symptoms of gagging and retching with gastrostomy feedings were selected from our interdisciplinary feeding team. An individualized PBGT diet was designed to meet the child's nutrition goals. The child's weight gain was recorded at each follow-up visit. A telephone survey was performed to determine parents' perceptions of the child's symptoms and oral feeding tolerance.

RESULTS

Thirty-three children (mean age, 34.2 months) participated in the trial. Average weight gain on the PBGT diet was 6.2 g/d. Seventeen children (52%) were reported to have a 76%-100% reduction in gagging and retching. Twenty-four children (73%) were reported to have a ≥ 50% decrease in symptoms. No child had worsened symptoms on the PBGT diet. Nineteen children (57%) were reported to have an increase in oral intake on the PBGT diet.

CONCLUSIONS

A PBGT diet is an effective means of providing nutrition to children with feeding disorders. In children post-fundoplication surgery, a PBGT diet may decrease gagging and retching behaviors.

Postoperative surveillance and detection of postprandial hypoglycemia after fundoplasty in children

OBJECTIVE

To evaluate the prevalence of postprandial hypoglycemia (PPH) after fundoplasty after the initiation of a universal postoperative glucose surveillance plan in the neonatal intensive care unit (NICU).

STUDY DESIGN

This was a retrospective chart review of children (newborn to 18 years) who underwent fundoplasty at The Children's Hospital of Philadelphia during the 2-year-period after the launch of a surveillance protocol in the NICU and other units. The rate of screening, frequency of PPH (postprandial blood glucose <60 mg/dL [3.3 mmol/L] on 2 occasions), frequency of postprandial hyperglycemia preceding PPH, timing of PPH presentation, and related symptoms were evaluated.

RESULTS

A total of 285 children were included (n = 64 in the NICU; n = 221 in other units). Of the children screened in all units, 24.0% showed evidence of PPH, compared with 1.3% of unscreened children. Hyperglycemia preceded PPH in 67.7% (21/31) of all screened children. Within the NICU, most children had PPH within 1 week, but only 53.3% exhibited symptoms of dumping syndrome.

CONCLUSIONS

This study supports the use of universal postoperative blood glucose surveillance in identifying PPH in children after fundoplasty. Earlier identification of PPH would lead to earlier treatment and minimize the effects of unidentified hypoglycemic events.

Treatments for pediatric achalasia: Heller myotomy or pneumatic dilatation?

AIM

The treatment of achalasia consists of reducing distal esophageal obstruction by either Heller myotomy surgery or endoscopic pneumatic dilatation. The aim of the present study was to evaluate the short- and middle-term results of these procedures in children.

METHODOLOGY

For technical reasons, children under six years old (n=8) were treated by surgery only, whereas patients over six years old (n=14) were treated by either Heller myotomy or pneumatic dilatation.

RESULTS

Of the children aged under six years, 75% were symptom-free at six months and 83% at 24 months of follow-up. Of the patients aged over six years, complete remission was achieved by Heller myotomy in 44.5% vs. 55.5% by pneumatic dilatation after six months, and in 40% vs. 65%, respectively, after 24 months. Both pneumatic dilatation and Heller myotomy showed significant rates of failure.

CONCLUSION

These results suggest that pneumatic dilatation may be considered a primary treatment in children over six years old. Also, where necessary, Heller myotomy and pneumatic dilatation may be used as complementary treatments.

Prolonged enteral feeding is often required to avoid long-term nutritional and metabolic complications after esophagogastric dissociation

BACKGROUND

Total esophagogastric dissociation (TED) was first described in 1997 by Bianchi as a new surgical procedure to treat severe gastroesophageal reflux disease (GERD) in children with neurological impairment. Recently, TED has been proposed in other conditions, such as esophageal atresia, esotracheal cleft, or caustic esophageal lesions. Although the long-term results in terms of GERD control have been previously reported, those regarding the nutritional and metabolic status have never been documented.

PATIENTS AND METHODS

All patients without neurological impairment with TED between 1999 and 2004 at Robert Debre Hospital and Jeanne de Flandre Hospital, France, were prospectively investigated, paying particular attention to their metabolic and nutritional status (blood concentration of iron and vitamins A, D, E, and B12; lipid malabsorption; and hyperglycemia test) and growth.

RESULTS

Seventeen children underwent TED. Six received primary procedures, whereas 11 were operated on because of severe respiratory diseases or failure to thrive. The mean follow-up was 6 years (range 3-8 years). Two children died (12%). Seven children were weaned from enteral nutrition support, but 5 of them had failure to thrive, steatorrhea, and/or malabsorption of vitamin B12 and/or fat-soluble vitamins. Eight patients had dumping syndrome, which was symptomatic in 6 cases.

CONCLUSIONS

TED is an effective procedure for treatment of GERD. However, nutritional and metabolic complications including dumping syndrome and chronic digestive malabsorption are frequent after TED, especially after enteral nutrition weaning. A long-term follow-up of these patients is thus necessary and prolonged enteral nutrition support is recommended.

Increased glucagon-like peptide-1 secretion and postprandial hypoglycemia in children after Nissen fundoplication

CONTEXT

Postprandial hypoglycemia (PPH) is a frequent complication of Nissen fundoplication in children. The mechanism responsible for the PPH is poorly understood, but involves an exaggerated insulin response to a meal and subsequent hypoglycemia. We hypothesize that increased glucagon-like peptide-1 (GLP-1) secretion contributes to the exaggerated insulin surge and plays a role in the pathophysiology of this disorder.

OBJECTIVE

The aim of the study was to characterize glucose, insulin, and GLP-1 response to an oral glucose load in children with symptoms of PPH after Nissen fundoplication.

DESIGN

Ten patients with suspected PPH and a history of Nissen fundoplication and eight control subjects underwent a standard oral glucose tolerance test at The Children's Hospital of Philadelphia. Blood glucose (BG), insulin, and intact GLP-1 levels were obtained at various time points.

PARTICIPANTS

Children ages 4 months to 13 years old were studied.

MAIN OUTCOME MEASURES

Change scores for glucose, insulin, and intact GLP-1 were recorded after an oral glucose tolerance test.

RESULTS

All cases had hypoglycemia after the glucose load. Mean BG at nadir (+/- sd) was 46.7 +/- 11 mg/dl for cases (vs. 85.9 +/- 21.3 mg/dl; P < 0.0005). Mean change in BG from baseline to peak (+/- sd) was 179.3 +/- 87.4 mg/dl for cases (vs. 57.8 +/- 39.5 mg/dl; P = 0.003). Mean change in BG (+/- sd) from peak to nadir was 214.4 +/- 85.9 mg/dl for cases (vs. 55.9 +/- 41.1 mg/dl, P < 0.0005). Mean change in insulin (+/- sd) from baseline to peak was 224.3 +/- 313.7 microIU/ml for cases (vs. 35.5 +/- 22.2 microIU/ml; P = 0.012). Mean change in GLP-1 (+/- sd) from baseline to peak was 31.2 +/- 24 pm (vs. 6.2 +/- 9.5 pm; P = 0.014).

CONCLUSIONS

Children with PPH after Nissen fundoplication have abnormally exaggerated secretion of GLP-1, which may contribute to the exaggerated insulin surge and resultant hypoglycemia.

Hypoglycemia in infants and children

Our understanding of the many different causes of hypoglycemia has vastly expanded in recent years. Most hypoglycemic disorders in infants and children are due to defects in the metabolic systems involved in fasting adaptation or the hormone control of these systems. As a result of these defects, infants and children have an abnormal adaptation to fasting, which results in hypoglycemia. The "critical sample" allows one to assess the integrity of the fasting systems when hypoglycemic. An understanding of the pathophysiology of these disorders establishes a foundation for a rational approach in evaluating the etiology of the hypoglycemia and developing the most appropriate management plan.

Pediatric surgeons and gastroesophageal reflux

BACKGROUND/AIMS

Better antacid medications and the introduction of laparoscopy destabilize the indications for fundoplication. This study aims at raising a discussion among pediatric surgeons on these indications, modalities, and the results of this operation.

MATERIALS AND METHODS

A total of 252 refluxing children operated between 1992 and 2006 were divided into groups according to predominant symptoms (93 digestive, 47 respiratory, and 68 neurologic) or to comorbidities (27 esophageal atresia, 10 diaphragmatic hernia, 5 abdominal wall defects, and 2 caustic stricture), and the indications, complications, mortality, and long-term results were reviewed. Features of open (n = 135) and laparoscopic (n = 117) approaches were compared, and long-term integrity of the wrap was analyzed using the Kaplan-Meier method.

RESULTS

Digestive, respiratory, and neurologic patients had more often laparoscopic plications, whereas all others rather had an open approach. The rate of complications was 22%, and they were more frequent in children operated by laparotomy (P < .05). Median follow up was 51.3 months (range, 6-160). Overall wrap integrity was maintained in 89% of the children, and the proportions for digestive, respiratory, and neurologic groups were 95%, 95%, and 87%, respectively. For esophageal atresia, congenital diaphragmatic hernia, abdominal wall defects, and caustic stricture, they were 72%, 77%, 100%, and 0%, respectively. The functional results were fully satisfactory in 83% of patients. There were 17 deaths (6.7%), but only 3 in the first postoperative month and only 1 related to the operation (0.4%).

CONCLUSIONS

Fundoplication is a powerful method of reflux control. It is indicated after failure of medical treatment in gastroesophageal reflux disease and in symptomatic refluxers with some particular comorbidities. Surgery should be offered only after diagnosis has been firmly established, and the indications must remain identical for open and laparoscopic procedures. High technical standards and rigorous report of the results are required for keeping a relevant place of pediatric surgery in the treatment of this disease.

A case of severe Pierre Robin sequence with failure to thrive and tachycardia resolved after redo-fundoplication and hiatoplasty

We report an infant suffering from Pierre Robin sequence complicated by gastro-oesophageal reflux and failure to thrive, which were resistant to conservative therapy and a hemifundoplication. Gastro-oesophageal reflux was accompanied by supraventricular tachycardia, treated with propafenone. Tachycardia may be present in Pierre Robin sequence as a consequence of cardiac parasympathetic imbalance. The patient recovered completely from the gastro-oesophageal reflux and tachycardia after redo-fundoplication (Nissen) and a hiatoplasty were performed.

CONCLUSION

This case shows that a thorough search for gastro-oesophageal reflux is indicated in each case of Pierre Robin sequence with failure to thrive.

Gastrointestinal complications of fundoplication

In children with medically refractory gastroesophageal reflux disease (GERD), fundoplication is effective and safe. However, in a subset of patients, gastrointestinal dysfunction occurs postoperatively. Symptoms include chest pain, persistent dysphagia in 5%, gas bloat in 2% to 4%, diarrhea in up to 20%, and dumping syndrome in up to 30%. Symptoms are often nonspecific, arising from recurrent or persistent GERD, anatomic complications such as disrupted or herniated wrap, functional disturbances such as rapid gastric emptying or altered gastric accommodation, or alternative diagnoses such as cyclic vomiting syndrome or food allergy. Detailed investigation, including various combinations of pHmetry, videofluoroscopy, endoscopy, motility studies, and dumping provocation testing, may be required to clarify pathophysiology and guide management.

Discerning differences: gastroesophageal reflux and gastroesophageal reflux disease in infants

Gastroesophageal reflux (GER) is a frequently encountered problem in infancy; it commonly resolves spontaneously by 12 months of age. Caregivers are challenged to discriminate between physiologic GER and the much less common and more serious condition of pathologic gastroesophageal reflux disease (GERD). Pathologic GERD may require more extensive clinical evaluation and necessitate treatment. GERD may be primary or secondary; secondary GERD is associated with a number of genetic syndromes, chromosomal abnormalities, birth defects, or a host of neurologic conditions frequently seen in the newborn intensive care unit. This article reviews the unique anatomic, physiologic, developmental, and nutritional vulnerabilities of infants that make them susceptible to GER and GERD. The North American Society of Pediatric Gastroenterology and Nutrition have recently developed a comprehensive evidence-based clinical practice guideline that structures the diagnostic approach and treatment option in infants with suspected and confirmed GERD. These guidelines provide clear definitions of GER and GERD to aid the clinician in distinguishing between the 2 conditions. They emphasize the use of history and physical examination and discuss the indications for the use of other diagnostic procedures, such as upper gastrointestinal studies, nuclear medicine scintiscan, esophagogastroduodenoscopy with biopsy, and esophageal pH probe monitoring. Management of GERD begins with a nonpharmacologic approach; the emphasis is on positioning, a trial of a hypoallergenic formula, and thickening of feedings. When these measures fail to control symptoms, a trial of either histamine(2) antagonists or a proton pump inhibitor may be indicated. Finally, surgical treatment may be needed if all other management measures fail. New sleep recommendations for infants with GERD are now consistent with the American Academy of Pediatrics' standard recommendations. Prone sleep positioning is only considered in unusual cases, where the risk of death and complications from GERD outweighs the potential increased risk of sudden infant death syndrome (SIDS). The nursing care of infants with GER and GERD, as well as relevant issues for parent education and support, are reviewed and are essential elements in managing this common condition.

Acarbose treatment of infant dumping syndrome: extensive study of glucose dynamics and long-term follow-up

Dumping syndrome is a sequel of gastric surgery in adults and Nissen fundoplication in children. The syndrome is characterized by various gastrointestinal symptoms as well as irritability, diaphoresis and lethargy. Shortly after a meal, symptoms are associated with hyperglycemia (early dumping), followed by late dumping symptoms associated with reactive hypoglycemia. Several therapeutic and dietary manipulations failed to control these symptoms in previous reports as well as in an infant we have followed after Nissen fundoplication. Acarbose, an alpha-glucosidase inhibitor, has been used sporadically in adults after gastric surgery, but only once in children. In most of these studies, the effect of acarbose (on reactive hypoglycemia) was evaluated over several hours postprandially or after oral glucose load. In our study, we recorded glucose dynamics by a continuous glucose monitor system over 2 to 3 days before and during acarbose treatment, while the patient was on a well-controlled diet. These measurements (720 before and 832 on therapy) suggested that both early and late dumping symptoms are causally related to the rate of glucose elevation and decline, rather than to glucose peak and nadir, respectively. Acarbose attenuated both postprandial glucose hyperglycemia and reactive hypoglycemia, which subsequently led to a significant reduction in dumping symptoms. In a follow-up of 14 months, acarbose was well tolerated and the frequency of dumping symptoms was remarkably reduced.

Dumping Syndrome

The dumping syndrome consists of early postprandial abdominal and vasomotor symptoms, resulting from osmotic fluid shifts and release of vasoactive neurotransmitters, and late symptoms secondary to reactive hypoglycemia. Effective relief of symptoms of dumping syndrome can be achieved with dietary modifications to minimize ingestion of simple carbohydrates and to exclude fluid intake during ingestion of the solid portion of the meal. More severely affected individuals may respond to agents such as pectin and guar, which increase the viscosity of intraluminal contents, or to drugs such as the alpha-glucosidase inhibitor acarbose, which blunts the rapid absorption of glucose, and the somatostatin analog octreotide, which alters gut transit and impairs release of vasoactive mediators into the bloodstream.

Guidelines for evaluation and treatment of gastroesophageal reflux in infants and children: recommendations of the North American Society for Pediatric Gastroenterology and Nutrition

Gastroesophageal reflux (GER), defined as passage of gastric contents into the esophagus, and GER disease (GERD), defined as symptoms or complications of GER, are common pediatric problems encountered by both primary and specialty medical providers. Clinical manifestations of GERD in children include vomiting, poor weight gain, dysphagia, abdominal or substernal pain, esophagitis and respiratory disorders. The GER Guideline Committee of the North American Society for Pediatric Gastroenterology and Nutrition has formulated a clinical practice guideline for the management of pediatric GER. The GER Guideline Committee, consisting of a primary care pediatrician, two clinical epidemiologists (who also practice primary care pediatrics) and five pediatric gastroenterologists, based its recommendations on an integration of a comprehensive and systematic review of the medical literature combined with expert opinion. Consensus was achieved through Nominal Group Technique, a structured quantitative method. The Committee examined the value of diagnostic tests and treatment modalities commonly used for the management of GERD, and how those interventions can be applied to clinical situations in the infant and older child. The guideline provides recommendations for management by the primary care provider, including evaluation, initial treatment, follow-up management and indications for consultation by a specialist. The guideline also provides recommendations for management by the pediatric gastroenterologist. This document represents the official recommendations of the North American Society for Pediatric Gastroenterology and Nutrition on the evaluation and treatment of gastroesophageal reflux in infants and children. The American Academy of Pediatrics has also endorsed these recommendations. The recommendations are summarized in a synopsis within the article. This review and recommendations are a general guideline and are not intended as a substitute for clinical judgment or as a protocol for the management of all patients with this problem.

Esophagogastric dissociation versus fundoplication: Which is best for severely neurologically impaired children?

PURPOSE

Neurologically impaired children (NIC) often have swallowing difficulties, severe gastroesophageal reflux, recurrent respiratory infections, and malnutrition. Bianchi proposed esophagogastric dissociation (EGD) as an alternative to fundoplication and gastrostomy. The authors compared these 2 approaches.

METHODS

Twenty-nine consecutive symptomatic NIC refractory to medical therapy were enrolled in a prospective study and divided into 2 groups: A (n = 12), NIC who underwent fundoplication and gastrostomy; B (n = 14), NIC who underwent EGD. Three were excluded because of previous fundoplication. Anthropometric (percentage of the 50th percentile/age of healthy children) and biochemical parameters, respiratory infections per year, hospitalization (days per year), feeding time (minutes), and "quality of life" (parental psychological questionnaire, range 0 to 60), were analyzed (t test and Mann-Whitney test) preoperatively and 1 year postoperatively. Complications were recorded.

RESULTS

Compared with group A, group B presented a statistically significant increase of all anthropometric and nearly all biochemical parameters with a statistical difference in terms of respiratory infections, hospital stay, feeding time, and psychological questionnaire. In group A, 2 bowel obstructions, 1 tight fundoplication, 1 dumping syndrome, and 3 failures of fundoplication occurred. Group B presented 1 anastomotic stricture, 1 paraesophageal hernia, and 1 bowel obstruction.

CONCLUSIONS

Compared with fundoplication and gastrostomy, EGD offered better nutritional rehabilitation, reduction in respiratory infections, and improved quality of life. EGD can be rightfully chosen as a primary procedure.

Gastroesophageal reflux in children

Gastroesophageal reflux (GER) is a common disorder in infants and children with a high rate of spontaneous resolution. Some children, however, will continue to have problems and progress from functional GER to pathogenic GER. In children with functional GER, diagnostic testing and pharmacologic treatment is unnecessary. In more involved cases, there are a number of tests available that help to quantify and qualify the extent of disease. Treatment begins with conservative measures and progresses to acid neutralization/supression and medications to enhance motility. Should medical management fail to control the consequences of reflux disease, surgical intervention is warranted.

Benefit of uncooked cornstarch in the management of children with dumping syndrome fed exclusively by gastrostomy

OBJECTIVES

Children with dumping syndrome fed exclusively by gastrostomy are difficult to manage because liquid diets are given directly into the antrum. The gastric contents are emptied rapidly into the small intestine, with consequent hyperglycemia followed by a delayed hypoglycemia and multiple, often debilitating, symptoms. Uncooked cornstarch is a complex carbohydrate that provides a slow and continuous glucose source and may delay gastric emptying. The objective of this study was to determine the efficacy of uncooked cornstarch in the treatment of these children.

METHODS

The medical records of eight children with dumping syndrome fed exclusively by gastrostomy were reviewed. Dumping syndrome was diagnosed if there was consistent symptomatology, rapid gastric emptying, and abnormal glucose measurements after a glucose tolerance test. Enough uncooked cornstarch to match hepatic glucose production for 4 h was added to control hypoglycemia, and the feeding formula was modified to control hyperglycemia.

RESULTS

All patients had debilitating symptoms. Weight z-score on admission was -2.31 +/- 0.29. Glucose shifts were controlled in all. There was a significant difference between the maximum (221.3 +/- 19.3 mg/dl vs 121.3 +/- 6.9 mg/dl; p < 0.008) and minimum serum glucose (47 +/- 7.8 mg/dl vs 65.6 +/- 4 mg/dl; p < 0.04) before and after uncooked cornstarch. Weight increased from 11.87 +/- 1.4 kg to 15.10 +/- 2.3 kg (p = 0.06). In seven patients, bolus feedings were successfully administered, and symptoms improved or resolved.

CONCLUSIONS

Uncooked cornstarch controlled the glucose shifts, resolved most of the symptoms, allowed bolus feedings, and enhanced weight gain in these children.

Gastrointestinal problems in the neurologically impaired child

Damage to the developing central nervous system may result in significant dysfunction in the gastrointestinal tract and is reflected in impairment in oral-motor function, rumination, gastro-oesophageal reflux, with or without aspiration, delayed gastric emptying and constipation. These problems can all potentially contribute to feeding difficulty in disabled children. Early recognition of an infant with neurological impairment that is compromising the normal feeding process is crucial. Detailed assessment of the nature of the feeding difficulties will help to predict the anticipated future nutritional needs and will allow decisions to be made about the appropriateness of input from different professionals (speech therapy, dietitians, gastroenterologists). Only when such information has been carefully assembled will rational and directed medical and surgical therapy be possible. Nutritional rehabilitation of disabled children can be associated with increased mortality and morbidity secondary to gastro-oesophageal reflux, retching, dumping syndrome or aspiration. It may also entail an increased work for care givers and increase costs of care. It is therefore necessary to document the impact of such rehabilitation on growth and quality of life for both patient and care giver.