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S2k-Leitlinie Gastroösophageale Refluxkrankheit und eosinophile Ösophagitis der Deutschen Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten (DGVS) – März 2023 – AWMF-Registernummer: 021–013. ZEITSCHRIFT FUR GASTROENTEROLOGIE 2023; 61:862-933. [PMID: 37494073 DOI: 10.1055/a-2060-1069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
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Schuitenmaker JM, Kuipers T, Smout AJPM, Fockens P, Bredenoord AJ. Systematic review: Clinical effectiveness of interventions for the treatment of nocturnal gastroesophageal reflux. Neurogastroenterol Motil 2022; 34:e14385. [PMID: 35445777 PMCID: PMC10078437 DOI: 10.1111/nmo.14385] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/28/2022] [Accepted: 04/11/2022] [Indexed: 12/06/2022]
Abstract
BACKGROUND Nocturnal gastroesophageal reflux symptoms have a major impact on sleep quality and are associated with complicated gastroesophageal reflux disease (GERD). We performed a systematic review to assess the data on the effectiveness of the currently available interventions for the treatment of nocturnal reflux symptoms. METHODS We searched PubMed, EMBASE, and the Cochrane Library. All prospective, controlled, and uncontrolled clinical trials in adult patients describing interventions (lifestyle modifications, surgical and pharmacological) for nocturnal gastroesophageal reflux symptoms were assessed for eligibility. A narrative descriptive summary of findings is presented together with summary tables for study characteristics and quality assessment. KEY RESULTS The initial reference search yielded 3067 citations; 66 citations were screened in full text, of which 31 articles were included. Studies on lifestyle modifications include head of bed elevation (n = 5), prolonging dinner-to-bed time (n = 2), and promoting left lateral decubitus position (n = 2). Placebo-controlled clinical trials investigating proton pump inhibitors (PPIs) (n = 11) show success rates ranging from 34.4% to 80.8% in the PPI group versus 10.4%-51.7% in the placebo group. Laparoscopic fundoplication is reserved for severe disease only. There is insufficient evidence for a recommendation on the use of nasal continuous positive airway pressure (nCPAP), hypnotics, baclofen and adding bedtime H2 receptor antagonists for reducing nocturnal reflux. CONCLUSION INFERENCES: A sequential treatment strategy, including head of bed elevation, prolonging dinner-to-bed time, promoting left lateral decubitus position and treatment with acid-suppressive medication is recommended for nocturnal gastroesophageal reflux symptoms. Currently, there is insufficient evidence for the use of nCPAP, hypnotics, baclofen and adding bedtime H2 receptor antagonists.
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Affiliation(s)
- Jeroen M Schuitenmaker
- Department of Gastroenterology & Hepatology, Amsterdam Gastroenterology and Metabolism, University Medical Centers Amsterdam, Amsterdam, The Netherlands
| | - Thijs Kuipers
- Department of Gastroenterology & Hepatology, Amsterdam Gastroenterology and Metabolism, University Medical Centers Amsterdam, Amsterdam, The Netherlands
| | - André J P M Smout
- Department of Gastroenterology & Hepatology, Amsterdam Gastroenterology and Metabolism, University Medical Centers Amsterdam, Amsterdam, The Netherlands
| | - Paul Fockens
- Department of Gastroenterology & Hepatology, Amsterdam Gastroenterology and Metabolism, University Medical Centers Amsterdam, Amsterdam, The Netherlands
| | - Albert J Bredenoord
- Department of Gastroenterology & Hepatology, Amsterdam Gastroenterology and Metabolism, University Medical Centers Amsterdam, Amsterdam, The Netherlands
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O'Connor-Reina C, Garcia JMI, Baptista P, Garcia-Iriarte MT, Alba CC, Perona M, Borrmann PF, Alcala LR, Plaza G. Non-acid reflux and sleep apnea: the importance of drug induced sleep endoscopy. J Otolaryngol Head Neck Surg 2021; 50:42. [PMID: 34193270 PMCID: PMC8247236 DOI: 10.1186/s40463-021-00526-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/15/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND We present the first case of a patient with obstructive sleep apnea syndrome (OSA), where drug induced sleep endoscopy was helpful to suspect a non-acid reflux disease and showed an improvement in a swollen epiglottis after treatment. Patient ameliorated significantly his disease only with medical therapy. CASE PRESENTATION A 54-year-old man without significant anatomical findings with obstructive sleep apnea syndrome and non-acid gastroesophageal reflux disease (GERD) disease whose Apnea- hypopnea index (AHI) was significantly reduced with the intake of 500 mg of sodium alginate twice a day for 6 months. Conventional digestive tests such as esophagoscopy and simple- and double-channel 24-h pH-metry suggested mild GERD. Conventional proton-pump inhibitor treatment with pantoprazole (40 mg daily) was started without any improvement in his sleep. Multichannel intraluminal 24-h impedanciometry indicated the presence of severe pathological GER of gaseous origin. The patient's AHI decreased from 25.3 at baseline to 8 after treatment with sodium alginate. A drug-induced sleep endoscopy study showed the changes before and after this treatment and was helpful for the diagnosis. CONCLUSIONS Thus, medical treatment can be a therapeutic option in some patients with OSA. Multichannel 24-h impedanciometry should be performed when nonacid GERD is suspected.
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Affiliation(s)
- Carlos O'Connor-Reina
- Otorhinolaryngology Department, Hospital Quiron Salud Marbella, Marbella, Spain. .,Otorhinolaryngology Department, Hospital Quiron Salud Campo de Gibraltar, Cádiz, Spain.
| | - Jose Maria Ignacio Garcia
- Pulmonology Department, Hospital Quiron Salud Marbella, Marbella, Spain.,Pulmonology Department, Hospital Quiron Salud Campo de Gibraltar, Cádiz, Spain
| | - Peter Baptista
- Otorhinolaryngology Department, Clinica Universitaria de Navarra, Pamplona, Spain
| | | | | | - Monica Perona
- Digestive Department, Hospital Quironsalud Marbella, Marbella, Spain
| | - Paz Francisca Borrmann
- Phonoaudiology Unit. Otorhinolaryngology Department Hospital Universitario Italiano Buenos Aires, Buenos Aires, Argentina
| | | | - Guillermo Plaza
- Otorhinolaryngology Department, Hospital Universitario de Fuenlabrada & Hospital Sanitas la Zarzuela. Universidad Rey Juan Carlos, Madrid, Spain
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Lim KG, Morgenthaler TI, Katzka DA. Sleep and Nocturnal Gastroesophageal Reflux: An Update. Chest 2018; 154:963-971. [PMID: 29859888 DOI: 10.1016/j.chest.2018.05.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 05/09/2018] [Accepted: 05/21/2018] [Indexed: 02/07/2023] Open
Abstract
Nocturnal gastroesophageal reflux has been associated with poor sleep quality. Normal physiological adaptations of the aerodigestive system to sleep prolong and intensify nocturnal reflux events. This occurrence leads to sleep disruption, as well as to esophageal, laryngeal, and laryngopharyngeal reflux. Controversy exists on whether OSA and nocturnal reflux are causally linked or merely associated because of shared risk factors. Advances in diagnostic technology have provided new insights into gastroesophageal reflux and the mechanisms of nocturnal reflux during sleep. This update reviews new data on causal links between sleep and gastroesophageal reflux disease.
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Affiliation(s)
- Kaiser G Lim
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN; Division of Allergic Diseases, Mayo Clinic, Rochester, MN.
| | | | - David A Katzka
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN
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Akiyama J, Kuribayashi S, Baeg MK, Bortoli N, Valitova E, Savarino EV, Kusano M, Triadafilopoulos G. Current and future perspectives in the management of gastroesophageal reflux disease. Ann N Y Acad Sci 2018; 1434:70-83. [DOI: 10.1111/nyas.13850] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 03/28/2018] [Accepted: 04/06/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Junichi Akiyama
- Division of Gastroenterology and HepatologyNational Center for Global Health and Medicine Tokyo Japan
| | - Shiko Kuribayashi
- Division of Gastroenterology and Hepatology, Integrative Center of Internal MedicineGunma University Hospital Maebashi Japan
| | - Myong Ki Baeg
- Division of Gastroenterology, Department of Internal MedicineCatholic Kwandong University College of Medicine, International St. Mary's Hospital Incheon South Korea
| | - Nicola Bortoli
- Gastroenterology Unit, Department of Translational Research and New Technologies in Medicine and SurgeryUniversity of Pisa Pisa Italy
| | - Elen Valitova
- Department of Upper Gastrointestinal Tract DisordersClinical Scientific Centre Moscow Russia
| | - Edoardo V. Savarino
- Gastroenterology Unit, Department of Surgery, Oncology and GastroenterologyUniversity of Padua Padua Italy
| | - Motoyasu Kusano
- Division of Gastroenterology and Hepatology, Integrative Center of Internal MedicineGunma University Hospital Maebashi Japan
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Fujiwara Y, Kohata Y, Nakahara K, Tanigawa T, Yamagami H, Shiba M, Watanabe K, Tominaga K, Watanabe T, Arakawa T. Characteristics of nighttime reflux assessed using multichannel intraluminal impedance pH monitoring and a portable electroencephalograph. Dis Esophagus 2016; 29:278-84. [PMID: 25604848 DOI: 10.1111/dote.12324] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Gastroesophageal reflux disease (GERD) is strongly associated with sleep disturbances. Although the mechanisms of this association have not been fully elucidated, nighttime reflux plays a central role. However, the detailed characteristics of nighttime reflux occurring during sleep are unknown. The aim of the present study was to examine the characteristics and prevalence of nighttime reflux in the natural sleep environment of GERD patients. Seventeen patients experiencing daily moderate-to-severe heartburn and/or regurgitation were studied using multichannel intraluminal impedance pH monitoring and electroencephalography off-proton pump inhibitor treatment. Nighttime reflux was divided based on reflux type (liquid or gas), acidity (acidic, weakly acidic, or alkaline) and extent (distal only or proximal migration) according to the standard criteria. Nighttime phases were divided as follows: recumbent-awake before falling asleep, nonrapid eye movement, rapid eye movement, awakening from sleep, and post-awakening in the morning. Among 184 nighttime refluxes, 43 (23%) occurred during recumbent-awake before falling asleep, 28 (15%) during nonrapid eye movement, 14 (8%) during rapid eye movement, 86 (46%) during awakening from sleep, and 13 (7%) during post-awakening in the morning. Liquid reflux was more common in awakening during sleep (92%), nonrapid eye movement (100%), and rapid eye movement (100%) compared with awakening before falling asleep (68%). The prevalence of proximal migration was significantly lower in nonrapid eye movement and rapid eye movement than in the other phases. There were no differences in acidity and bolus clearance time among the phases. Thirteen (65%) of 20 events with GERD symptoms had nighttime reflux, suggesting that only 7.1% (13 of 184) of nighttime refluxes were symptomatic. Nighttime reflux was observed in 48 (11%) of 425 awakening episodes during sleep. Different reflux patterns at each phase during nighttime might explain the pathogenesis of GERD and its related sleep disturbances.
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Affiliation(s)
- Y Fujiwara
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Y Kohata
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - K Nakahara
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - T Tanigawa
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - H Yamagami
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - M Shiba
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - K Watanabe
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - K Tominaga
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - T Watanabe
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - T Arakawa
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Hiramoto K, Fujiwara Y, Ochi M, Okuyama M, Tanigawa T, Yamagami H, Shiba M, Watanabe K, Watanabe T, Tominaga K, Arakawa T. Effects of esomeprazole on sleep in patients with gastroesophageal reflux disease as assessed on actigraphy. Intern Med 2015; 54:559-65. [PMID: 25786444 DOI: 10.2169/internalmedicine.54.3718] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE Gastroesophageal reflux disease (GERD) is strongly associated with sleep disturbances. Although treatment with proton pump inhibitors (PPIs) helps to improve GERD symptoms and subjective sleep parameters, the effects of PPI therapy on objective sleep parameters are conflicting. The aim of this study was to examine the effects of esomeprazole treatment on GERD symptoms and sleep parameters assessed using actigraphs and questionnaires. METHODS Thirteen patients with GERD received 20 mg of esomeprazole once daily for two weeks. The patients wore actigraphs from three days before the initiation of PPI treatment to the end of therapy. They were also asked to answer the following self-reported questionnaires: Frequency Scale for the Symptoms of GERD (FSSG), Pittsburg Sleep Quality Index (PSQI) and Epworth Sleepiness Scale (ESS). Objective sleep parameters were evaluated using actigraphy. RESULTS Treatment with esomeprazole significantly decreased the total FSSG score, including the scores for reflux and dysmotility, as well as the ESS score, although it had no effect on the PSQI score. After the second week of treatment, esomeprazole significantly decreased the wake time (from 47.5±39.6 min to 36.0±27.1 min) and sleep latency period (from 19.5±19.8 min to 9.9±10.2 min) and increased the percentage of sleep time (from 89.1±8.8% to 91.9±6.3%); however, improvements were not noted in all objective parameters. CONCLUSION Esomeprazole treatment significantly improves various objective sleep parameters in Japanese patients with GERD. Further placebo-controlled randomized trials are needed to obtain detailed results.
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Affiliation(s)
- Keiko Hiramoto
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Japan
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Nakahara K, Fujiwara Y, Tsukahara T, Yamagami H, Tanigawa T, Shiba M, Tominaga K, Watanabe T, Urade Y, Arakawa T. Acid reflux directly causes sleep disturbances in rat with chronic esophagitis. PLoS One 2014; 9:e106969. [PMID: 25215524 PMCID: PMC4162547 DOI: 10.1371/journal.pone.0106969] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 08/04/2014] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND & AIMS Gastroesophageal reflux disease (GERD) is strongly associated with sleep disturbances. Proton pump inhibitor (PPI) therapy improves subjective but not objective sleep parameters in patients with GERD. This study aimed to investigate the association between GERD and sleep, and the effect of PPI on sleep by using a rat model of chronic acid reflux esophagitis. METHODS Acid reflux esophagitis was induced by ligating the transitional region between the forestomach and the glandular portion and then wrapping the duodenum near the pylorus. Rats underwent surgery for implantation of electrodes for electroencephalogram and electromyogram recordings, and they were transferred to a soundproof recording chamber. Polygraphic recordings were scored by using 10-s epochs for wake, rapid eye movement sleep, and non-rapid eye movement (NREM) sleep. To examine the role of acid reflux, rats were subcutaneously administered a PPI, omeprazole, at a dose of 20 mg/kg once daily. RESULTS Rats with reflux esophagitis presented with several erosions, ulcers, and mucosal thickening with basal hyperplasia and marked inflammatory infiltration. The reflux esophagitis group showed a 34.0% increase in wake (232.2±11.4 min and 173.3±7.4 min in the reflux esophagitis and control groups, respectively; p<0.01) accompanied by a reduction in NREM sleep during light period, an increase in sleep fragmentation, and more frequent stage transitions. The use of omeprazole significantly improved sleep disturbances caused by reflux esophagitis, and this effect was not observed when the PPI was withdrawn. CONCLUSIONS Acid reflux directly causes sleep disturbances in rats with chronic esophagitis.
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Affiliation(s)
- Kenichi Nakahara
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yasuhiro Fujiwara
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Takuya Tsukahara
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hirokazu Yamagami
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Tetsuya Tanigawa
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Masatsugu Shiba
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Kazunari Tominaga
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Toshio Watanabe
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yoshihiro Urade
- Department of Molecular Behavioral Biology, Osaka Bioscience Institute, Suita, Japan
- Molecular Sleep Biology Laboratory, International Institute for Integrative Sleep Medicine, World Premier International Research Center, Tsukuba University, Tsukuba, Japan
| | - Tetsuo Arakawa
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Schmidt J, Łapienis M, Stawicki M. Laryngologiczny obraz refluksu krtaniowo-gardłowego – doświadczenia własne w diagnozowaniu i leczeniu. Otolaryngol Pol 2013; 67:139-43. [DOI: 10.1016/j.otpol.2013.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 01/11/2013] [Indexed: 11/27/2022]
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Abstract
There is strong evidence of a bidirectional relationship between gastroesophageal reflux disease and sleep disturbances. Gastroesophageal reflux (GER) events during the night result in sleep disturbances that include difficulty in falling asleep, sleep fragmentation, and early morning awakenings. In addition, sleep deprivation per se induces hyperalgesia of the esophageal mucosa in response to acid. Treatment includes lifestyle modifications, proton-pump inhibitors (PPIs), γ-aminobutyric acidB agonists, hypnotics, and antireflux surgery. Among these, PPIs are considered first-line treatment for the control of nighttime gastric acid secretion; however, the timing and dosing of PPI administration should be individualized for each patient.
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Affiliation(s)
- Yasuhiro Fujiwara
- Department of Gastroenterology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585, Japan
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Turk H, Hauser B, Brecelj J, Vandenplas Y, Orel R. Effect of proton pump inhibition on acid, weakly acid and weakly alkaline gastro-esophageal reflux in children. World J Pediatr 2013; 9:36-41. [PMID: 23389331 DOI: 10.1007/s12519-013-0405-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Accepted: 03/22/2012] [Indexed: 12/12/2022]
Abstract
BACKGROUND The effect of proton pump inhibitors on the characteristics of gastroesophageal reflux (GER) in children and adolescents was evaluated. METHODS Twenty-one children and adolescents with symptoms suggesting GER disease (GERD) underwent upper endoscopy and a 24-hour multichannel intraluminal impedance/pH (MII-pH) monitoring before and at the end of 2 months of therapy with proton pump inhibitors (PPIs). RESULTS Fourteen (67%) patients reported clinically relevant symptom improvement after 2 months of PPIs intake. At the first endoscopy, 8 (38%) patients had macroscopic signs of reflux esophagitis; after two months of therapy, 6/8 (75%) patients had a complete mucosal recovery. There was a significant reduction in the total percentage of mean acid reflux time (from 13.1% to 3.8%), and the De Meester score dropped to normal (from 46.4 to 13.1). The mean number of acid refluxes decreased significantly from 48 to 15 per 24 hours, while inversely, the mean number of weakly acid refluxes increased significantly from 26 to 64 per 24 hours. PPI therapy did not affect the total number of reflux episodes, the number of liquid and mixed refluxes, the duration of esophageal bolus exposure and proximal extent of the reflux. CONCLUSIONS In children and adolescents with GERD, PPIs do not affect the total number of reflux episodes. PPIs only decrease the acidity of refluxate. Nevertheless, the majority of patients with typical reflux symptoms may report symptom improvement. Esophagitis can be healed after PPI treatment. The treatment of weakly acid and weakly alkaline reflux remains a challenge for physicians in the future.
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Affiliation(s)
- Helena Turk
- University Children's Hospital, University Medical Centre, Ljubljana, Slovenia
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WITHDRAWN: Laryngologiczny obraz refluksu krtaniowo-gardłowego – doświadczenia własne w diagnozowaniu i leczeniu. Otolaryngol Pol 2012. [DOI: 10.1016/j.otpol.2012.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Regenbogen E, Helkin A, Georgopoulos R, Vasu T, Shroyer ALW. Esophageal Reflux Disease Proton Pump Inhibitor Therapy Impact on Sleep Disturbance. Otolaryngol Head Neck Surg 2012; 146:524-32. [DOI: 10.1177/0194599812436933] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Objective. To perform a systematic literature review that evaluates the impact of proton pump inhibitor treatment of gastroesophageal reflux disease on sleep disturbance–related outcomes. Data Sources. PubMed, Web of Science, and Cochrane databases were searched from 1989 (when omeprazole became available) to present; additional references gleaned from citations. Review Methods. The search strategy identified all randomized placebo-controlled clinical trials published in English; both proton pump inhibitor use and outcome measures of sleep disturbance were reported for esophageal reflux disease patients. Using a preestablished systematic review protocol and data extraction format, 4 coauthors independently reviewed all articles. Results. The original search identified 20 articles; 9 were not directly relevant, and 3 were not placebo controlled. Sample sizes varied from 15 to 642; mean age was 47.4 ± 4.56 years; mean body mass index was 29.4 ± 2.9; the proportion of women varied widely across studies. Esomeprazole was studied most frequently. More than 50% of publications permitted rescue antacids. Two studies reported polysomnography outcomes, without statistically significant improvement. All studies reported non-polysomnography outcomes; 7 identified statistically significant improvements demonstrating drug treatment superiority over placebo. Conclusion. The existing evidence supports the use of proton pump inhibitors as a treatment for esophageal reflux disease to improve quality-of-life sleep disturbance–related outcomes. Given the wide variability in proton pump inhibitor treatments and sleep disturbance–related outcomes reported, however, study-specific results cannot be directly compared or aggregated. This conclusion appears robust not only for 7 of 8 studies included but also for the 3 highest quality studies.
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Affiliation(s)
- Elliot Regenbogen
- Division of Otolaryngology Head and Neck Surgery, Stony Brook University Medical Center, Stony Brook, New York, USA
| | - Alex Helkin
- Division of Otolaryngology Head and Neck Surgery, Stony Brook University Medical Center, Stony Brook, New York, USA
| | - Rachel Georgopoulos
- Division of Otolaryngology Head and Neck Surgery, Stony Brook University Medical Center, Stony Brook, New York, USA
| | - Tajender Vasu
- Division of Pulmonary, Critical Care and Sleep Medicine, Stony Brook University Medical Center, Stony Brook, New York, USA
| | - A. Laurie W. Shroyer
- Department of Surgery, Stony Brook University School of Medicine, Stony Brook, New York, USA
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Abstract
The otolaryngic allergist must be able to distinguish between common nonallergic diagnoses that present very similarly to allergic conditions. This article describes a few of the vast myriad of conditions that must be ruled out before a diagnosis of allergy may be made. After reading this article clinicians will be able to identify various conditions, which will enhance their ability to appropriately make correct decisions for prompt and efficient management of their patients with allergic or nonallergic diseases of the head and neck.
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Affiliation(s)
- Robert J Stachler
- Department of Otolaryngology Head and Neck Surgery, Henry Ford Health Systems, Detroit, MI, USA.
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Fornari F, Blondeau K, Mertens V, Tack J, Sifrim D. Nocturnal gastroesophageal reflux revisited by impedance-pH monitoring. J Neurogastroenterol Motil 2011; 17:148-57. [PMID: 21602991 PMCID: PMC3093006 DOI: 10.5056/jnm.2011.17.2.148] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2010] [Revised: 01/05/2011] [Accepted: 01/13/2011] [Indexed: 12/11/2022] Open
Abstract
Background/Aims Impedance-pH monitoring allows detailed characterization of gastroesophageal reflux and esophageal activity associated with reflux. We assessed the characteristics of nocturnal reflux and esophageal activity preceding and following reflux. Methods Impedance-pH tracings from 11 healthy subjects and 76 patients with gastroesophageal reflux disease off acid-suppressive therapy were analyzed. Characteristics of nocturnal supine reflux, time distribution and esophageal activity seen on impedance at 2 minute intervals preceding and following reflux were described. Results Patients had more nocturnal reflux events than healthy subjects (8 [4-12] vs 2 [1-5], P = 0.002), with lower proportion of weakly acidic reflux (57% [35-78] vs 80% [60-100], P = 0.044). Nocturnal reflux was mainly liquid (80%) and reached the proximal esophagus more often in patients (6% vs 0%, P = 0.047). Acid reflux predominated in the first 2 hours (66%) and weakly acidic reflux in the last 3 hours (70%) of the night. Most nocturnal reflux was preceded by aboral flows and cleared by short lasting volume clearance. In patients, prolonged chemical clearance was associated with less esophageal activity. Conclusions Nocturnal weakly acidic reflux is as common as acid reflux in patients with gastroesophageal reflux disease, and predominates later in the night. Impedance-pH can predict prolonged chemical clearance after nocturnal acid reflux.
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Affiliation(s)
- Fernando Fornari
- Center for Gastroenterological Research, Catholic University of Leuven, Belgium.
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Abstract
Dual pH-multichannel intraluminal impedance (pH-MII) is a sensitive tool for evaluating overall gastroesophageal reflux disease, and particularly for permitting detection of nonacid reflux events. pH-MII technology is especially useful in the postprandial period or at other times when gastric contents are nonacidic.pH-MII was recently recognized by the North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition and the European Society for Pediatric Gastroenterology, Hepatology, and Nutrition as being superior to pH monitoring alone for evaluation of the temporal relation between symptoms and gastroesophageal reflux. In children, pH-MII is useful to correlate symptoms with reflux (particularly nonacid reflux), to quantify reflux during tube feedings and the postprandial period, and to assess efficacy of antireflux therapy. This clinical review is simply an evidence-based overview addressing the indications, limitations, and recommended protocol for the clinical use of pH-MII in children.
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Boeckxstaens GE, Smout A. Systematic review: role of acid, weakly acidic and weakly alkaline reflux in gastro-oesophageal reflux disease. Aliment Pharmacol Ther 2010; 32:334-43. [PMID: 20491749 DOI: 10.1111/j.1365-2036.2010.04358.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND The importance of weakly acidic and weakly alkaline reflux in gastro-oesophageal reflux disease (GERD) is gaining recognition. AIM To quantify the proportions of reflux episodes that are acidic (pH <4), weakly acidic (pH 4-7) and weakly alkaline (pH >7) in adult patients with GERD, and to evaluate their correlation with symptoms. METHODS Studies were identified by systematic PubMed and Embase searches. Data are presented as sample-size weighted means and 95% confidence intervals. RESULTS In patients with GERD taking a proton pump inhibitor (PPI), 80% (76-84%) of reflux episodes were weakly acidic or weakly alkaline and 83% (78-88%) of reflux symptom episodes were associated with weakly acidic or weakly alkaline reflux episodes. In patients with GERD not taking a PPI, 63% (59-67%) of reflux episodes were acidic and 72% (57-87%) of reflux symptom episodes were associated with acid reflux episodes. Six studies presented data separately for weakly alkaline reflux, which accounted for <5% of all reflux episodes, both on and off PPI therapy. CONCLUSIONS Weakly acidic reflux underlies the majority of reflux episodes in patients with GERD on PPI therapy, and is the main cause of reflux symptoms occurring despite PPI therapy.
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Affiliation(s)
- G E Boeckxstaens
- Department of Gastroenterology and Hepatology, Academic Medical Centre, Amsterdam, The Netherlands.
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Gastroesophageal reflux and obstructive sleep apnea: More dangers in the night. Sleep Med 2010; 11:337-8. [DOI: 10.1016/j.sleep.2009.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 12/15/2009] [Indexed: 11/19/2022]
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Abstract
BACKGROUND Many patients with chronic gastro-oesophageal reflux disease (GERD) have frequent nighttime heartburn as well as sleep-related gastro-oesophageal reflux (GOR). Sleep-related GOR has been shown to play an important role in the development of oesophagitis and other complications of GOR. AIM To present a conceptual argument that nighttime heartburn and associated sleep-related GOR should be recognized as a distinct clinical entity deserving special attention with regard to the diagnosis and treatment of GERD. METHODS The data presented come from surveys of GERD patients as well as from physiological studies to include studies monitoring oesophageal pH and spontaneous reflux events during polysomnographically (PSG) monitored sleep. RESULTS Evidence is presented to show that nighttime heartburn is prevalent and its occurrence separates patients from those who have heartburn most exclusively in the daytime. The evidence presented also supports the notion that nighttime heartburn sufferers have a more complicated disease and they have a greater risk of developing oesophagitis and other respiratory complications. The data also show that responses to acid mucosal contact are quite different during sleep compared to responses measured during the waking state. CONCLUSIONS Nighttime heartburn and GOR represent a distinct clinical entity which deserves specific attention in the diagnosis and optimal treatment of GERD.
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Affiliation(s)
- W C Orr
- Lynn Health Science Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73112, USA.
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Abdel-Gawad TA, El-Hodhod MA, Ibrahim HM, Michael YW. Gastroesophageal reflux in mechanically ventilated pediatric patients and its relation to ventilator-associated pneumonia. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2009; 13:R164. [PMID: 19840378 PMCID: PMC2784395 DOI: 10.1186/cc8134] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/29/2009] [Revised: 09/04/2009] [Accepted: 10/19/2009] [Indexed: 11/10/2022]
Abstract
INTRODUCTION The objective was to determine the frequency of gastroesophageal reflux (GER) in mechanically ventilated pediatric patients and its role as a risk factor for ventilator-associated pneumonia (VAP), which may be enhanced among those patients. METHODS The study is a prospective cohort study of mechanically ventilated pediatric patients in the pediatric intensive care unit (PICU) of Ain Shams University Children's Hospital. It was conducted in 24 mechanically ventilated patients (16 of them developed VAP and 8 did not, with mean age of 16.6 +/- 20.5 and 18.6 +/- 22.4 months respectively). Esophageal 24-hour pH-metry beside clinical and laboratory evaluation of their underlying problem and severity of their condition were carried out. RESULTS All VAP patients had GER (50% alkaline reflux, 12.5% acidic reflux and 37.5% combined reflux) compared to 75% of non-VAP ones (100% alkaline reflux). The mean total reflux time was significantly longer among VAP (50 minutes) versus non-VAP (3 minutes) patients. There was significant increase in acidic reflux parameters among non-survivors versus survivors (P < 0.001). For VAP mortality, total acidic reflux at a cut-off value of 28.6 minutes is found to be a mortality predictor with a sensitivity of 100% and a specificity of 100%. CONCLUSIONS GER is a constant incident in mechanically ventilated pediatric patients, with alkaline reflux being more common than acidic reflux. Both acidic and alkaline refluxes were found to be associated with the development of VAP and total reflux time was found to be a reliable predictor of VAP. Moreover, acidic reflux was found to be more related to mortality than alkaline reflux.
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Affiliation(s)
- Tarek A Abdel-Gawad
- Pediatric Department, Ain Shams Faculty of Medicine, Abbassia Ramsis St, Cairo 11566, Egypt.
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Abstract
Recent studies demonstrate a bidirectional relationship between gastroesophageal reflux disease (GERD) and sleep in which nighttime reflux leads to sleep deprivation and sleep deprivation can exacerbate GERD by enhancing perception of intraesophageal stimuli. Current treatment primarily focuses on reducing nighttime reflux, thus improving sleep quality. Future studies are needed to further explore the relationship between GERD and sleep and the potential of novel therapeutic options to interrupt the vicious cycle between them.
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Affiliation(s)
- Ronnie Fass
- Southern Arizona VA Health Care System, GI Section (1-111-GI), Tucson, AZ 85723, USA.
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Association of gastroesophageal reflux and O2 desaturation: a novel study of simultaneous 24-h MII-pH and continuous pulse oximetry. J Gastrointest Surg 2009; 13:854-61. [PMID: 19212794 DOI: 10.1007/s11605-009-0815-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2008] [Accepted: 01/12/2009] [Indexed: 01/31/2023]
Abstract
BACKGROUND Proof of the relationship between gastroesophageal reflux disease (GERD) and respiratory symptoms remains a challenge. Our aim was to determine the association between reflux events and O(2) desaturation in GERD patients with primary respiratory symptoms (RS) compared to those with primary esophageal symptoms (ES) using ambulatory monitoring systems. METHODS One thousand eight hundred fifty-one reflux episodes were detected by multichannel intraluminal impedance (MII)-pH testing in 30 patients with symptoms of GERD (20 RS, ten ES.) All patients underwent simultaneous 24-h MII-pH and continuous O(2) saturation monitoring via pulse oximetry. Reflux-associated desaturation events were determined by correlating synchronized 24-h esophageal pH and/or impedance and O(2) desaturation. RESULTS One thousand one hundred seventeen reflux events occurred in patients with RS and 734 in those with ES. Nearly 60% of these 1,851 reflux events were associated with O(2) desaturation. Markedly more events were associated with O(2) desaturation in patients with RS (74.5%, 832/1,117) than in patients with ES (30.4%, 223/734, p < 0.0001). The difference in reflux desaturation association was more profound with proximal reflux--80.3% with RS vs. 29.4% with ES (p < 0.0001). CONCLUSIONS A remarkably high prevalence of O(2) desaturation associated with gastroesophageal reflux was noted in patients with RS. Given further study, simultaneous combined esophageal reflux and O(2) saturation monitoring may prove a useful diagnostic tool in this difficult group of patients.
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Abstract
BACKGROUND/PURPOSE Although evidence suggests that gastroesophageal reflux disease (GERD) may interrupt sleep, the effects of symptomatic and endoscopically diagnosed GERD remain elusive because the patient population is heterogeneous. Accordingly, we designed a cross-sectional study to assess their association. METHODS Consecutive participants in a routine health examination were enrolled. Definition and severity of erosive esophagitis were assessed using the Los Angeles classification system. Demographic data, reflux symptoms, sleep quality and duration, exercise amount, alcohol consumption, and smoking habits were recorded. Factors affecting sleep quality and sleep duration were revealed by a polytomous logistic regression analysis. RESULTS A total of 3663 participants were recruited. Subjects with reflux symptoms, female gender, higher body mass index, and regular use of hypnotics had poorer sleep quality. Exercise was associated with better sleep quality. Either symptomatically or endoscopically, GERD did not disturb sleep duration. Among the 3158 asymptomatic patients, those with erosive esophagitis were more likely to have poor sleep quality. The risk increased with the severity of erosive changes (p = 0.03). CONCLUSION The present study highlights the adverse effect of gastroesophageal reflux on sleep, even in the absence of reflux symptoms. This finding has therapeutic implications in patients with silent erosive disease, and future trials are warranted.
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Gerson LB, Fass R. A systematic review of the definitions, prevalence, and response to treatment of nocturnal gastroesophageal reflux disease. Clin Gastroenterol Hepatol 2009; 7:372-8; quiz 367. [PMID: 19111949 DOI: 10.1016/j.cgh.2008.11.021] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2008] [Revised: 10/27/2008] [Accepted: 11/19/2008] [Indexed: 01/26/2023]
Abstract
BACKGROUND & AIMS More than half of patients with chronic gastroesophageal reflux (GERD) report nocturnal symptoms. We performed systematic literature review to define nocturnal heartburn and to determine potential causality between nocturnal reflux and extraesophageal manifestations. METHODS We performed a search of literature published from 1974-2007. Each study was examined by 2 reviewers and rated on the basis of study type and outcome. RESULTS Screening of 445 trials identified 59 (13%) studies relevant for analysis. Twenty-two (5%) of the trials described potential changes in sleep parameters resulting from treatment of heartburn. In most studies, nocturnal reflux was defined as heartburn symptoms that impacted sleep quality and duration. On the basis of 5 large population studies, the mean +/- standard deviation prevalence of nocturnal heartburn was 54% +/- 22%. Consequences of nocturnal reflux included poor sleep quality, daytime fatigue, difficulty initiating sleep or arousals from sleep, and impaired work productivity. The strength of the association between the occurrence of nocturnal reflux and late evening meals was flawed as a result of the confounding effect of the evening meal content. There was no evidence supporting causality between nocturnal heartburn and asthma or obstructive sleep apnea. Subjective, but not objective, measures of sleep improved with antireflux therapy. Head of bed elevation, proton pump inhibitor therapy, H(2)-receptor antagonists, and Nissen fundoplication alleviated nocturnal heartburn and associated sleep disturbances. CONCLUSIONS Nocturnal GERD is common and is associated with adverse sleep parameters. It can be effectively managed with medical and surgical therapy.
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Affiliation(s)
- Lauren B Gerson
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, California, USA.
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The Italian validation of the Montreal Global definition and classification of gastroesophageal reflux disease. Eur J Gastroenterol Hepatol 2009; 21:394-408. [PMID: 19262401 DOI: 10.1097/meg.0b013e32830a70e2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIMS Recently, a Global definition and a classification of gastroesophageal reflux disease (GERD) were developed by Montreal Consensus Group, composed of international expert gastroenterologists. Guidelines and consensus documents are, however, infrequently accepted and adopted at a local level. The aim of this study was to measure the acceptance of Montreal Global definition of GERD consensus document by specialists in a single country (Italy) and to measure the linguistic, scientific, and practical differences between the international consensus document and the Italian version. METHODS A 2-day meeting was held in June 2007 in Rome, Italy, attended by 147 Italian physicians who were experts in gastroenterology. They reviewed the individual original statements in their Italian translation and then voted on the statement using the scoring system used by the Montreal Consensus Group (6-point Likert scale). Voting was performed at baseline and after an analytical discussion on each statement, led by six internationally renowned experts. Consensus was defined as an agreement with a statement by at least two-thirds of the group. Results were compared with the Montreal statements. RESULTS AND DISCUSSION The level of consensus was already extremely high at the first vote (>90% with the two-thirds threshold). The level of agreement at the second vote increased slightly. The maximum variation between two votes was 33% (of increase from first to second round, 59-92%). The high level of agreement could be because of both the general acceptance of Montreal Consensus by scientific community, and the new scientific evidences published after the Montreal report, which fit with the original statements. CONCLUSION This study is the first national linguistic validation of the Montreal Global definition of GERD and is also proof of its scientific validity, based on the same methodology used to create the Montreal statements. It also suggests that evidence-based International disease classification systems can be applied to local settings after validation by local experts.
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Mello-Fujita L, Roizenblat S, Frison CR, Rodrigues Junior L, Garbuio S, Tufik S, Bittencourt LRA. Gastroesophageal reflux episodes in asthmatic patients and their temporal relation with sleep architecture. Braz J Med Biol Res 2008; 41:152-8. [PMID: 18297195 DOI: 10.1590/s0100-879x2008000200012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2006] [Accepted: 12/13/2007] [Indexed: 12/15/2022] Open
Abstract
Gastroesophageal reflux (GER) is common in asthma patients and can contribute to sleep disruption. The aim of the present study was to determine the time-related distribution of GER events together with their impact on sleep in asthmatic subjects with GER disease symptoms. The inclusion criteria were: 18-65 years, controlled moderate to severe asthma and GER-compatible clinical evidence. The exclusion criteria were: chronic obstructive lung disease, smoking, infections of the upper airways, use of oral corticosteroids, other co-morbidities, pregnancy, sleep-related disorders, night-time shift work, and the use of substances with impact on sleep. Asthmatic patients with nocturnal symptoms were excluded. All-night polysomnography and esophageal pH monitoring were recorded simultaneously. Of the 147 subjects selected, 31 patients and 31 controls were included. Seventeen patients were classified as DeMeester positive and 14 as DeMeester negative. Both groups displayed similar outcomes when general variables were considered. Sleep stage modification one minute prior to GER was observed in the DeMeester-positive group. Awakening was the most frequent occurrence at GER onset and during the 1-min period preceding 38% of the nocturnal GER. Sleep stage 2 was also prevalent and preceded 36% of GER events. In the DeMeester-negative group, awakening was the most frequent response before and during GER. Modifications in sleep stages, arousals or awakenings were associated with 75% of the total GER events analyzed during the period of one minute before and after the fall of esophageal pH below 4 in the DeMeester-positive group. These data provide evidence that sleep modifications precede the GER events in asthmatic patients.
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Affiliation(s)
- L Mello-Fujita
- Departamento de Psicobiologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
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Chen CL, Orr WC. Analysis of 24-hour esophageal pH monitoring: the effect of state of consciousness. Curr Gastroenterol Rep 2008; 10:258-62. [PMID: 18625136 DOI: 10.1007/s11894-008-0053-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This review addresses current advances in the diagnosis of sleep-related gastroesophageal reflux using ambulatory esophageal pH monitoring and laboratory monitoring, which includes polygraphic assessment of the state of consciousness. This 24-hour pH monitoring uses a new strategy of interpretation that characterizes acidic reflux events and specifically assesses the patient's position and state of consciousness. Thus, the recognition of reflux events during waking and sleep will add to the overall assessment of gastroesophageal reflux and its severity and clinical relevance. The pH testing, together with overnight polysomnography, offers an opportunity to link nighttime reflux with disease severity. The application of multichannel impedance with pH monitoring allows detection of acidic and nonacidic reflux events during sleep and also helps to elucidate the physiologic response of the esophagus to these events during sleep. The significance of these findings will increase our knowledge of esophageal physiology and the pathologic mechanisms underlying gastroesophageal reflux disease.
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Affiliation(s)
- Chien-Lin Chen
- Lynn Health Science Institute, Oklahoma University Health Sciences Center, Oklahoma City, OK 73112, USA
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Laryngopharyngeal reflux: diagnosis and treatment of a controversial disease. Curr Opin Allergy Clin Immunol 2008; 8:28-33. [PMID: 18188014 DOI: 10.1097/aci.0b013e3282f3f44f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
PURPOSE OF REVIEW Laryngopharyngeal reflux is a well-recognized and widely used term in ear, nose and throat practice. However, the symptoms and signs attributed to laryngopharyngeal reflux are non-specific and treatment is usually empirical. This review discusses current knowledge on diagnosis and treatment of laryngopharyngeal reflux. RECENT FINDINGS Information is evolving regarding the implications of laryngopharyngeal reflux in the development of pathological conditions affecting the upper aerodigestive tract epithelium such as chronic laryngitis, otitis media with effusion and chronic sinusitis. However, there is still much to learn about the pathophysiologic mechanisms of laryngopharyngeal reflux and their role in its related disease conditions and there is still considerable controversy on diagnostic as well as therapeutic parameters for this condition. There is no consensus on the diagnosis and treatment of laryngopharyngeal reflux and the majority of clinicians depend mainly on clinical findings and empirical therapeutic tests rather than more specific investigations. SUMMARY The concept of laryngopharyngeal reflux is still controversial. The current practice of empirical treatment with proton-pump inhibitors is based on weak evidence. However, this practice seems to be widely accepted and will not change until further clinical and laboratory studies improve our understanding of this common and well-recognized condition.
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