Nonpharmacological treatment of rumination syndrome in childhood: A systematic review of the literature.

Rumination syndrome (RS) is a complex functional disorder characterized by recurrent, repetitive regurgitation of recently swallowed food. RS may have medical and psychosocial implications, compromising the quality of life and causing high rates of school absenteeism. Pediatric RS has been poorly studied and little evidence regarding its treatment is available. This systematic review aims to evaluate the literature on the nonpharmacological treatment of RS in childhood. A systematic literature search was conducted on MEDLINE/PubMed, CINAHL, Cochrane Library, PsycINFO, and PEDro, from 2000 to 2023. The methodological quality of the publications was assessed by applying the guidelines proposed by the Equator network, according to the different designs of study, and the risk of bias was evaluated with the Risk Of Bias In Non-Randomized Studies of Interventions (ROBINS-I). Five hundred ninety-six studies were screened, and 7 studies were included in the review. Diaphragmatic breathing was the most used nonpharmacological treatment, and it was always combined with other therapeutic strategies. The vast heterogeneity of the physical or mental comorbidities and the methodology adopted in the publications did not allow a comparative analysis of the different treatments. Regardless of the type of treatment, high-intensity therapeutic programs and specific operators' training emerged as the most influencing factors for patients' outcomes. According to the available evidence, there is not enough high-quality evidence to suggest a defined therapeutic strategy. Large observational studies on selected patients accounting for possible confounders, with adequate follow-up times, and with clearly defined treatment regimens are needed to identify the best therapeutic approach.

Belching Disorders and Rumination Syndrome: A Literature Review.

BACKGROUND: Belching disorders and rumination syndrome (RS) are disorders of gut-brain interaction (DGBIs) in Rome IV. Belching disorders are composed of excessive gastric belching (GB) and supragastric belching (SGB). Excessive GB is related to physiological phenomenon whereas excessive SGB and RS are behavioral disorders. SUMMARY: A recent large internet survey found that prevalence of belching disorders and RS were 1% and 2.8%, respectively. It has been recognized that not a few patients with two behavioral disorders, excessive SGB and RS, could be misdiagnosed as proton pump inhibitors (PPI)-refractory gastroesophageal reflux disease (GERD). In patients with reflux symptoms, distinguishing these conditions is essential because they need psychological treatment (i.e., cognitive behavioral therapy (CBT) rather than acid suppressants. Clinicians should take a medical history meticulously first to identify possible excessive SGB and/or RS. High-resolution impedance manometry and/or 24-h impedance-pH monitoring can offer an objective diagnosis of the disorders. Several therapeutic options are available for excessive SGB and RS. The first-line therapy should be CBT using diaphragmatic breathing that can stop the behaviors involving complex muscle contraction (e.g., abdominal straining) to generate SGB or rumination. Overlap with eating disorders and/or other DGBIs such as functional dyspepsia can make management of the behavioral disorders challenging since such coexisting conditions often require additional treatments. KEY MESSAGES: Excessive SGB and RS are not unusual conditions. It is important to raise awareness of the behavioral disorders for appropriate management.

Current state of rumination syndrome.

Rumination syndrome (RS) is an underdiagnosed behavioral disorder of recurrent regurgitation. Regurgitation occurs in RS due to increased gastric pressure achieved by subconscious contraction of the abdominal musculature wall, reversing the pressure gradient between the esophagus and the stomach. RS is mainly diagnosed clinically by the Rome Criteria with symptoms of regurgitation without retching of recently ingested food into the mouth and subsequent spitting or re-mastication. When the diagnosis is unable to be made clinically, supportive testing including fed impedance manometry can be considered. RS occurs worldwide, affecting patients of all ages, races, and genders with a prevalence of 3.1-5.8%. There is significant overlap with RS and disorders of a gut-brain interaction and upright gastroesophageal reflux driven by aerophagia and supragastric belching. There is also an association with mood disorder, fibromyalgia, and eating disorders. RS may be misdiagnosed as a variety of other syndromes including gastroesophageal reflux disease, gastroparesis, achalasia, and bulimia nervosa. Once RS is diagnosed, the mainstay of treatment is diaphragmatic breathing to lower the intragastric pressure and increase the lower esophageal pressure. Diaphragmatic breathing can be supported with biofeedback and cognitive behavioral therapy as well as medication options for more refractory cases. Response to therapy overtime and changes in symptoms overtime can now be tracked with a validated questionnaire.

Global Prevalence and Impact of Rumination Syndrome.

BACKGROUND & AIMS: Rumination syndrome is a Disorder of Gut-Brain Interaction (DGBI) of unknown etiology. We aimed to assess its global prevalence and potential associations with other medical conditions. METHODS: Data were collected via the Internet in 26 countries. Subjects were evenly distributed by country, sex, and age groups and were invited for a "health survey" using the Rome IV diagnostic questionnaire and a supplementary questionnaire addressing factors potentially associated with DGBI. RESULTS: In all, 54,127 subjects completed the survey (51% male; mean age, 44.3 years). The overall prevalence of rumination syndrome was 3.1% (95% confidence interval [CI], 3.0-3.3%). It was highest in Brazil (5.5% CI, 4.5-6.5) and lowest in Singapore (1.7% CI, 1.1-2.2). The mean age of people with rumination syndrome was 44.5 years (standard deviation, 15.6) and it was more common in females (54.5% vs 45.5%). Factors independently associated with rumination syndrome were depression (odds ratio [OR], 1.46), anxiety (OR, 1.8), body mass index (OR, 1.04), and female sex (OR, 1.19). Subjects with multiple DGBI were at increased risk of having rumination syndrome, with the highest risk in subjects with 4 gastrointestinal regions with DGBI (OR, 15.9 compared with none). Quality of life (QoL) was lower in subjects with rumination syndrome compared with the rest of the cohort (PROMIS-10 score: physical QoL mean 12.9 vs 14.5; mental QoL mean 12.0 vs 13.6). CONCLUSIONS: The prevalence of rumination syndrome is higher than reported in most previous population studies and is likely underdiagnosed in clinical practice. Awareness of rumination syndrome should be raised among clinicians to improve care for these patients.

Rumination syndrome: Critical review. / Síndrome de rumiación, revisión crítica.

Rumination syndrome is a functional disorder characterized by the involuntary regurgitation of recently swallowed food from the stomach into the mouth, from where it can be re-chewed or expelled. Clinically, it is characterized by repeated episodes of effortless food regurgitation. The most usual complaint is frequent vomiting. The physical mechanism that generates regurgitation events is dependent on an involuntary process that alters abdominal and thoracic pressures accompanied by a permissive oesophageal-gastric junction. The diagnosis of rumination syndrome is clinical, highlighting the importance of performing an exhaustive anamnesis on the characteristics of the symptoms. Complementary tests are used to corroborate the diagnosis or rule out organic pathology. Treatment is focused on behavioural therapies as the first line, reserving pharmacological and surgical therapies for refractory cases.

A peculiar tale of vomiting - rumination syndrome in three adult patients.

Rumination syndrome is a functional gastrointestinal disorder with effortless, non-projectile regurgitation seen mostly in paediatric population and seems to be an uncommon gastrointestinal disorder due to lack of awareness among physicians. Here we report three such cases in adult patients that were labeled "refractory vomiting". No such case has been reported from Pakistan which makes this a unique case series. All of our patients were diagnosed within six to fifteen months of initial symptoms, hence a high index of suspicion is required for early diagnosis of Rumination Syndrome to avoid excessive and repeated investigations, causing emotional trauma and financial loss to patients and their families.

Comprehensive Cognitive-Behavioral Interventions Augment Diaphragmatic Breathing for Rumination Syndrome: A Proof-of-Concept Trial.

BACKGROUND: Rumination syndrome (RS) is often treated in medical settings with 1-2 sessions of diaphragmatic breathing to target reflexive abdominal wall contraction in response to conditioned cues (e.g., food). However, many patients remain symptomatic and require additional behavioral interventions. AIMS: In an attempt to augment diaphragmatic breathing with additional interventions, we tested the proof-of-concept of a comprehensive Cognitive-Behavioral Therapy (CBT) for RS. METHODS: In an uncontrolled trial, adults with RS completed a 5-8 session CBT protocol, delivered by one of two psychology behavioral health providers. CBT included two main phases: awareness training and diaphragmatic breathing (Phase 1) and modularized interventions chosen by the therapist and patient to target secondary maintenance mechanisms (Phase 2). At pre-treatment, post-treatment, and 3-month follow-up, participants completed a semi-structured interview on RS symptoms with an independent evaluator. RESULTS: Of 10 eligible individuals (ages 20-67 years, 50% female) offered treatment, all 10 initiated treatment and eight completed it. All participants endorsed high treatment credibility at Session 1. Permutation-based repeated measures ANOVA showed participants achieved large reductions in regurgitations across treatment [F(1,7) = 17.7, p = .007, η p2 = .69]. Although participants reduced regurgitations with diaphragmatic breathing during Phase 1, addition of other CBT strategies in Phase 2 produced further large reductions [F(1,7) = 6.3, p = .04, η p2 = .47]. Of eight treatment completers, treatment gains were maintained at 3-month follow-up for n = 6. CONCLUSIONS: Findings provide evidence of feasibility, acceptability, and proof-of-concept for a comprehensive CBT for RS that includes interventions in addition to diaphragmatic breathing to target secondary maintenance mechanisms. Randomized controlled trials are needed.

Duodenal Pathology in Patients with Rumination Syndrome: Duodenal Eosinophilia and Increased Intraepithelial Lymphocytes.

BACKGROUND: Rumination syndrome is a functional gastrointestinal disorder characterized by effortless, postprandial regurgitation. Duodenal eosinophilia has been described in patients with functional dyspepsia. Because of the significant symptomatic overlap between functional dyspepsia and rumination syndrome, we hypothesized that histological changes might exist among patients with rumination syndrome. METHODS: We included patients with rumination syndrome in whom we had obtained duodenal biopsies and compared these with controls. Digital images of biopsy specimens were analyzed for routine pathology and eosinophil counts by a pathologist blinded to the case-control status. RESULTS: The 22 patients with rumination syndrome had a mean age of 39.2 years (range 21-71) and 77% were female. The 10 controls had a mean age of 34.3 (range 27-69) and 80% were female. There was a significant increase in the mean eosinophil count among the patients with rumination syndrome compared to controls, 26 per mm2 (range 16-42) versus 18 per mm2 (range 10-28), p = 0.006. Intraepithelial lymphocyte counts were significantly higher in rumination patients (mean 15/100 enterocytes, range 8-29) versus controls (mean 11/100 enterocytes, range 11-18), p = 0.02. CONCLUSION: Patients with rumination syndrome have subtle duodenal pathology with eosinophilia and increased intraepithelial lymphocyte counts compared to controls.

Diagnosis and Treatment of Rumination Syndrome.

Rumination syndrome is a functional gastrointestinal disorder characterized by effortless postprandial regurgitation. The disorder appears uncommon, although only limited epidemiologic data are available. Awareness of the characteristic symptoms is essential for recognizing the disorder, and thus avoiding the long delay in diagnosis, that many patients experience. Although objective testing by postprandial esophageal high-resolution impedance manometry is available in select referral centers, a clinical diagnosis can be made in most patients. The main therapy for rumination syndrome is behavioral modification with postprandial diaphragmatic breathing. This clinical practice update reviews the pathophysiology, diagnosis, and treatment of rumination syndrome. Best Practice Advice 1: Clinicians strongly should consider rumination syndrome in patients who report consistent postprandial regurgitation. Such patients often are labeled as having refractory gastroesophageal reflux or vomiting. Best Practice Advice 2: Presence of nocturnal regurgitation, dysphagia, nausea, or symptoms occurring in the absence of meals does not exclude rumination syndrome, but makes the presence of it less likely. Best Practice Advice 3: Clinicians should diagnose rumination syndrome primarily on the basis of Rome IV criteria after an appropriate medical work-up. Best Practice Advice 4: Diaphragmatic breathing with or without biofeedback is the first-line therapy in all cases of rumination syndrome. Best Practice Advice 5: Instructions for effective diaphragmatic breathing can be given by speech therapists, psychologists, gastroenterologists, and other health practitioners familiar with the technique. Best Practice Advice 6: Objective testing for rumination syndrome with postprandial high-resolution esophageal impedance manometry can be used to support the diagnosis, but expertise and lack of standardized protocols are current limitations. Best Practice Advice 7: Baclofen, at a dose of 10 mg 3 times daily, is a reasonable next step in refractory patients.

Prevalence in primary school youth of pica and rumination behavior: The understudied feeding disorders.

OBJECTIVE: Little epidemiological evidence exists on rumination disorder behavior (RB) and pica behavior (PB). We examined prevalence of RB and PB and presence of comorbid feeding/eating disorder symptoms among school-aged children. METHOD: In elementary schools in Switzerland, 1,430 children (54.0% female) ages 7-13 completed the Eating Disorder Examination-Questionnaire for children (ChEDE-Q) and the Eating Disturbances in Youth Questionnaire (EDY-Q). RESULTS: EDY-Q behavior frequency showed 9.7% reported RB only, 10.0% reported PB only, and 3.1% reported RB + PB (≥1 on 0-6 Likert scale). At a clinical cut-off score of ≥ 4, 1.7% had RB only, 3.8% had PB only, and 1.1% had RB + PB. Avoidant/restrictive food intake disorder symptoms were most common in those with RB + PB, and more common in those with RB or PB than those without. The degree of eating disorder symptoms (by ChEDE-Q) over the past 28 days were similar among those with RB, PB, or RB + PB, but less common in those without RB or PB. DISCUSSION: RB and PB were commonly reported in our sample of school-aged children, even at a potential clinically significant cut-off. Our findings also suggest that the degree of eating disorder symptom comorbidity is similar between those with RB and PB.

High Cost and Low Yield: The Diagnostic Evaluation of Rumination Syndrome in Pediatrics.

OBJECTIVE: To document the use of diagnostic testing in adolescents who ultimately were diagnosed with rumination syndrome, a functional gastrointestinal disorder. We examined the diagnostic yield of each test as well as the associated costs, and we determined if any demographic or illness-related variables impacted the magnitude of the work-up. STUDY DESIGN: A retrospective chart review was conducted for 68 patients with rumination syndrome admitted to our inpatient treatment program. The cost and findings of patients' diagnostic investigations were gathered, as well as demographic and illness-related variables to determine factors that may be related to evaluation size. RESULTS: The most commonly used tests in the evaluation of rumination syndrome included esophagogastroduodenoscopy, gastric emptying, antroduodenal manometry, upper gastrointestinal series, and abdominal ultrasound scan. Each patient underwent an average of 8.8 tests, with the average cost for each patient's diagnostic work-up being US $19 795. Few tests were found to be beneficial in the diagnosis of rumination syndrome, and few demographic or illness variables were found to be related to the overall extent of the investigation. CONCLUSIONS: Extensive testing for rumination syndrome in adolescents is common in clinical practice, and comes at a high financial cost with low yield, likely delaying diagnosis and treatment. Symptom-based criteria should be used to make the diagnosis of rumination syndrome.

Compare the effectiveness of two treatments, behavioral activation and acceptance and commitment therapy, on depression and mental rumination in mothers of children with cerebral palsy in Ilam city.

BACKGROUND: Since in most families, mothers are more responsible for taking care of children and have more responsibility than fathers for monitoring the child, taking care of a disabled child can have a more negative effect on the psychological state of mothers. This study aimed to investigate the effectiveness of behavioral activation (BA) and acceptance and commitment therapy (ACT) in depression and rumination in mothers with children with cerebral palsy. MATERIALS AND METHODS: This research was quasi-experimental field research with a pre-posttest and control group. The study population comprised 237 mothers with children who had cerebral palsy and were referred to occupational therapy centers in Ilam, Iran. The sample consisted of 60 participants selected by convenience sampling, who were randomly divided into two experimental groups (BA and ACT) and a control group (n = 20 per group). Data were analyzed using Statistical Package for the Social Sciences (SPSS) version 27.0 with descriptive and inferential statistics, such as mean, standard deviation, and multivariate analysis of covariance (MANCOVA). RESULTS: The results of both BA and ACT were effective in reducing depression (P < 0.01) and rumination (P < 0.01) in the two experimental groups compared with the control group in the posttest phase. Furthermore, the effectiveness of the ACT in reducing depression and rumination was found to be more significant than the effectiveness of BA (P ≤ 0.05). CONCLUSION: The findings of the study suggest that both BA and ACT are effective in reducing depression and rumination in the research participants. However, the study also found that ACT was more effective than BA in reducing depression and rumination. Thus, both approaches can be used to strengthen treatment interventions to lessen depression and rumination in the research participants.

Multidisciplinary behavioral therapy reduces rumination.

BACKGROUND: Behavioral therapy has proved effective as rumination therapy. Our objective was to treat rumination patients using multidisciplinary behavioral therapy aimed at reducing ≥2 of the rumination score. METHODS: All patients fulfilled Rome IV criteria for rumination and were referred to speech therapy for psychoeducation, diaphragmatic breathing exercises and guided eating, physiotherapy for exercises to relax the thoracic and abdominal muscles, and consultation with the psychologist and the dietitian. Symptoms, depression, anxiety, health-related quality of life (HRQoL), and functional capacity were evaluated by questionnaires (Rome IV, Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), 15D, and World Health Organization Disability Assessment Schedule (WHODAS) 2.0) at baseline and at 6-month control. Esophageal manometry was performed at 6-month control. KEY RESULTS: The study enrolled 11 patients (19-64 years, 10 female). Rumination score: 6.5 (5-8) at baseline, 4.0 (3-5) at the 6-month control, p = 0.005. BDI/8 (6-13), BAI/15 (8-29) at baseline; BDI/7 (4-8), BAI/15 (7-27) at the 6-month control, NS. 15D score: 0.800 at baseline, 0.845 at the 6-month control, NS. WHODAS 2.0 score: 15 (7-33) at baseline, 11 (7-26) at the 6-month control, NS. Rumination could be evoked in manometry in six of nine (67%) patients at 6-month control. CONCLUSIONS AND INFERENCES: Behavioral multidisciplinary therapy significantly reduces the self-assessed frequency of rumination. These patients have more depression, anxiety and a lower HRQoL compared to the normal population.

The prevalence of rumination syndrome and rumination disorder: A systematic review and meta-analysis.

BACKGROUND: Rumination is characterized by the repeated regurgitation of food. Rumination syndrome is a disorder of gut-brain interaction diagnosed by Rome criteria, whereas rumination disorder is a feeding and eating disorder diagnosed by DSM-5 criteria. We aimed to determine the global prevalence of rumination according to these criteria across all age groups. METHODS: We performed a systematic review and meta-analysis of studies reporting the prevalence of rumination syndrome according to Rome III and Rome IV and rumination disorder according to the following validated DSM-5 assessments: PARDI, EDA-5, EDY-Q, STEP, and STEP-CHILD. We searched MEDLINE, EMBASE, and PsychINFO (from January 1, 2006, to June 1, 2023) to identify studies reporting the prevalence of rumination in community settings in participants of any age. We did a meta-analysis to estimate the pooled prevalence and odds ratio (OR) of rumination according to diagnostic criteria, country, and characteristics such as age and sex. KEY RESULTS: The search strategy generated 1243 studies, of which 147 studies appeared to be relevant. Thirty studies were included, with a total of 114,228 participants, of whom 61,534 of these were adults and 52,694 were children. The pooled prevalence of rumination syndrome in children of all ages according to Rome III criteria was 1.0% (95% CI 0.3-1.6; I2 91.1%), but no data were available for adults. According to Rome IV criteria, the pooled prevalence of rumination syndrome in children of all ages was 0.4% (95% CI 0.2-0.6; I2 56.4%) and 3.7% in adults (95% CI 2.3-5.1; I2 91.4%). The pooled prevalence of rumination disorder in children of all ages according to EDY-Q was 2.1% (95% CI 0.9-3.4; I2 = 78.1%), but only one study utilizing EDY-Q in adults was included (0.7% [95% CI 0.4-1.0]). No data were available for children or adults using any other validated DSM-5 assessments for rumination disorder. Irrespective of diagnostic criteria, the pooled prevalence of rumination was higher in adults compared to children and adolescents (3.0% [95% CI 1.4-4.7; I2 = 98.1%] vs. 0.8% [95% CI 0.4-1.3; I2 = 90.8%]), but higher in adolescents than in children (1.1% [95% CI 0.3-2.0; I2 = 92.8%] vs. 0.1% [95% CI 0.0-0.2; I2 = 24.5%]). In adults, factors independently associated with rumination were female gender (OR 1.4 [95% CI 1.0-2.0]), anxiety (OR 2.3 [95% CI 2.1-2.6]), and depression (OR 1.8 [95% CI 1.2-2.9]). No association between gender and rumination was seen in children. CONCLUSIONS AND INFERENCES: The prevalence of rumination is more common in adults than in children. In adults, rumination is associated with female gender, anxiety, and depression. Future population studies should aim to better understand why this behavior is more common in adults and also compare validated DSM-5 assessments for rumination disorder with Rome criteria for rumination syndrome as prevalence may differ.

Cognitive behavioural therapy-based interventions for gastroduodenal disorders of gut-brain interaction: A systematic review.

OBJECTIVE: Cognitive behavioural therapy (CBT) is increasingly used to manage Disorders of Gut-Brain Interaction (DGBIs). This systematic review aimed to review the evidence for the effectiveness of CBT-based interventions for patients with gastroduodenal DGBIs. METHODS: Medline, Embase, PubMed, Cochrane Central, and Scopus were searched in July 2022. Studies were included if they investigated the effects of a CBT-based intervention on gastrointestinal symptoms and/or psychological outcomes pre- and post-intervention in patients with gastroduodenal DGBIs. Case studies, studies not in English, and studies with patients under 18 years were excluded. Results were synthesised narratively, and standardised effect sizes were calculated where possible. RESULTS: Nine studies (seven RCTs and two pre/post studies) were identified, with data reported in 10 articles (total N = 602). The studies investigated patients with functional dyspepsia (n = 7), rumination syndrome (n = 1), and supragastric belching (n = 1). The studies had heterogeneous interventions, methodologies, and outcomes, precluding meta-analysis, as well as a moderate-high risk of bias and high drop-outs rates. Findings demonstrated decreased gastrointestinal symptoms and improved anxiety, depression, and quality of life, from pre- to post-intervention, with medium to large effect sizes for symptoms and small to large effect sizes for psychological outcomes. Efficacy was maintained at follow-up, up to one year later. CONCLUSIONS: This review suggests promising evidence that CBT effectively improves gastrointestinal symptoms and psychological outcomes in patients with gastroduodenal DGBIs. However, heterogeneity, risk of bias, and lack of statistical reporting were noted, indicating the need for more robust research and standardisation.

Mucosal eosinophils, mast cells, and intraepithelial lymphocytes in youth with rumination syndrome.

BACKGROUND: Rumination syndrome has been associated with increased duodenal eosinophils and intraepithelial lymphocytes in adults. The aims of the current study were to assess densities of antroduodenal eosinophils and mast cells and duodenal intraepithelial lymphocytes in youth with rumination syndrome and to compare cell densities in those with and without abdominal pain or early satiety. METHODS: Twenty-eight youth fulfilling Rome IV criteria for rumination syndrome who had undergone endoscopy were identified and compared to 10 controls. Antral and duodenal biopsies were assessed to determine densities of eosinophils, mast cells, and intraepithelial lymphocytes. Cell densities were also compared between rumination patients with and without abdominal pain and those with and without early satiety. KEY RESULTS: Antral mast cell (peak 18.5±6.5 vs. 12.5±2.7) and eosinophil (peak 9.6±5.2 vs. 4.9±2.1) densities were significantly greater in patients with rumination syndrome as compared to controls. Duodenal intraepithelial lymphocyte densities were also increased in rumination syndrome (18.9 ± 5.1 vs. 11.7 ± 1.5; p<.001). Associations were independent of the presence of abdominal pain or early satiety. CONCLUSIONS AND INFERENCES: In conclusion, we found an increase in eosinophil and mast cell densities in the gastric antrum and an increase in intraepithelial lymphocytes in the duodenum in youth with rumination syndrome which was independent of the presence of abdominal pain or early satiety. These findings suggest a potential role for inflammation in the pathophysiology of rumination syndrome. Future studies should address whether treatment directed at these cells are beneficial in treating rumination syndrome.

Prevalence of behavioral disorders in patients with vonoprazan-refractory reflux symptoms.

BACKGROUND: Behavioral disorders, such as supragastric belching (SGB) and rumination syndrome (RS), which may be treated by cognitive behavioral therapy, are common in patients with reflux symptoms refractory to proton pump inhibitors (PPI). Vonoprazan (VPZ) has been used as a new type of acid inhibitor in Japan since 2015. We herein investigated the prevalence of behavioral disorders in patients with VPZ-refractory reflux symptoms and attempted to identify predictive factors. METHODS: We retrospectively analyzed esophagogastroduodenograms, high-resolution manometry, and 24-h multiluminal impedance pH-metry (MIIpH) in patients with VPZ-refractory reflux symptoms (heartburn or regurgitation) receiving 20 mg VPZ who underwent these tests at our hospital between January 2015 and April 2020. Patients were divided as follows: non-erosive reflux disease with pathological esophageal acid exposure (NERD), functional heartburn (FH), reflux hypersensitivity (RH), excessive (> 13 per day) SGB, and possible RS based on MIIpH parameters. RESULTS: Among 49 patients, 6 (12.2%) had SGB, 4 (8.2%) possible RS, 29 (59.2%) FH, 9 (18.4%) RH, and 1 (2%) NERD. Possible RS patients had more postprandial non-acid reflux events than FH patients (p < 0.05). The multivariate logistic regression analysis did not identify any predictive factors with statistical significance. CONCLUSION: More than 20% patients with VPZ-refractory reflux symptoms had behavioral disorders. The use of HRM and MIIpH may be clinically relevant for a better diagnosis and more specific treatment.

Detection and characteristics of rumination syndrome in patients presenting for gastric symptom evaluation.

BACKGROUND: Rumination syndrome involves effortless, repeated regurgitation, and can overlap with other upper gastrointestinal disorders, including gastroparesis. To inform better diagnostic detection of rumination, we aimed to (1) identify frequency and characteristics of rumination in patients presenting for gastric symptom evaluation; and (2) assess demographic and clinical characteristics that could differentiate those with versus those without rumination. METHODS: Consecutively referred patients to two tertiary academic centers for gastric symptom specialty evaluation were included (N = 242). We obtained demographic information, gastric emptying scintigraphy, upper gastrointestinal symptoms using the Patient Assessment of Upper Gastrointestinal Symptoms (PAGI-SYM), and Rome IV-based rumination questionnaire. KEY RESULTS: Thirty-one of the 242 (12.8%) patients met criteria for rumination syndrome, of which 48% reported associated psychosocial impairment. Comparing those with rumination and those without, there were no differences in race, gender, frequency of diabetes, or frequency of gastroparesis. The median PAGI-SYM score for rumination patients was higher than for those without (3.03 vs. 2.55; unadjusted p = 0.043, adjusted p = 0.30). This was largely driven by increased heartburn/regurgitation subscale scores (2.71 vs. 1.57, unadjusted p = 0.0067, adjusted p = 0.046), itself influenced by elevated daytime regurgitation/reflux (3.0 vs. 2.0; unadjusted p = 0.007, adjusted p = 0.048). There were no significant differences on the remaining PAGI-SYM subscales. CONCLUSIONS AND INFERENCES: Rumination syndrome determined by Rome IV criteria was present in 12.8% of patients presenting for gastric symptom evaluation. Higher self-report PAGI-SYM heartburn/regurgitation subscale scores, particularly daytime regurgitation/reflux symptoms, were the only parameters that distinguished rumination. The PAGI-SYM heartburn/regurgitation subscale could be used to screen for rumination, in addition to GERDAQ6.

Rumination Syndrome in Children and Adolescents: A Mini Review.

Introduction: Rumination syndrome involves recurrent regurgitation of food and is believed to be underdiagnosed with patients experiencing long delays in diagnosis. It can be associated with significant social consequences, high rates of school absenteeism, and medical complications such as weight loss. The primary aims of the current review are to assess the literature regarding prevalence, pathophysiology, and treatment outcomes with a focus on neurotypical children and adolescents. Results: Population studies in children/adolescents, 5 years of age or older, range from 0 to 5.1%. There are fewer studies in clinical settings, but the prevalence appears to be higher in patients with other gastrointestinal symptoms, particularly chronic vomiting. While physiologic changes that occur during a rumination episode are well-described, the underlying cause is less well-defined. In general, rumination appears to have similarities to other functional gastrointestinal disorders including dysmotility, possibly inflammation, and an interaction with psychologic function. While diaphragmatic breathing is considered the mainstay of treatment, pediatric data demonstrating efficacy is lacking, especially as an isolated treatment. Conclusion: Pediatric rumination syndrome remains greatly understudied, particularly regarding treatment. There is a need to better define prevalence in both the primary care and subspecialty clinical settings, especially in patients presenting with vomiting or apparent gastroesophageal reflux. There is a need to determine whether treatment of co-morbid conditions results in improvement of rumination. Diaphragmatic breathing needs to be studied and compared to other competing responses.

Chronic vomiting in children: A prospective study reveals rumination syndrome is an important etiology that is underdiagnosed and untreated.

BACKGROUND: The diagnosis of rumination syndrome is frequently overlooked, and under-recognized; children are subjected to unnecessary testing and inappropriate treatment for a condition which can be diagnosed clinically and managed easily. In the first ever systematic exploration of this condition from India, we present a prospective study on children with chronic vomiting in which rumination emerged as the predominant cause. METHODS: This was a prospective study in which all consecutive children (5-18 years) presenting with chronic or recurrent vomiting of at least 2-month duration were enrolled. Clinical history was assessed by a physician-administered questionnaire. All subjects underwent standard testing followed by additional investigations as required. The ROME III criteria were used. RESULTS: Fifty children (28 boys, age 12.2 + 3 years) were enrolled. Diagnosis was rumination syndrome 30, cyclical vomiting 8, functional vomiting 6, intestinal tuberculosis 4, intestinal malrotation 1, and superior mesenteric artery syndrome 1. Children with rumination syndrome had a relapsing and remitting (12, 40%) or a chronically symptomatic course (18, 60%). These children received incorrect diagnoses (26, 87%) or no diagnosis (3, 10%) and extensive investigation before referral. Before referral, children with rumination syndrome were treated with a median of four drugs (range 1 to 9); two underwent surgery (appendectomy) for their symptoms while one child was subjected to electroconvulsive therapy. Overall, resolution after treatment was seen in 26 (87%) with a relapse in 8 (27%) children. CONCLUSION: The diagnosis of rumination syndrome is delayed and these children are often inappropriately treated. Therapy in the form of diaphragmatic breathing has a good success rate.