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Voulgaris A, Archontogeorgis K, Chadia K, Siopi D, Nena E, Steiropoulos P. Differences in Anthropometric, Sleep and Respiratory Characteristics between Hypercapnic and Normocapnic Patients with COPD-OSA Overlap Syndrome. J Pers Med 2024; 14:600. [PMID: 38929821 PMCID: PMC11204545 DOI: 10.3390/jpm14060600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/26/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
BACKGROUND Overlap syndrome (OS), the coexistence of chronic obstructive pulmonary disease and obstructive sleep apnea, is frequently characterized by the presence of daytime hypercapnia (pCO2 ≥ 45 mmHg). The aim of this study was to investigate potential differences in anthropometric, sleep and respiratory characteristics between hypercapnic and normocapnic patients with OS. METHODS Consecutive patients who underwent polysomnography, pulmonary function testing and arterial blood gases and had been diagnosed with OS were enrolled in the study. RESULTS According to pCO2 levels in wakefulness, the patients were divided into group A, consisting of OS patients without hypercapnia (n = 108) or group B, consisting of OS patients with hypercapnia (n = 55). The majority of included patients in both groups were males (n = 92 in group A vs. n = 50 in group B). Group B had increased BMI (p = 0.001), neck (p = 0.017) and waist circumference (p = 0.013), higher scores in Epworth sleepiness scale (ESS) (p = 0.008), increased sleep efficiency (p = 0.033), oxygen desaturation index (p = 0.004) and time with oxyhemoglobin saturation <90% (p = 0.006) than group A. Also, Group B had decreased average and minimum oxyhemoglobin saturation during sleep (p < 0.001). Hypercapnic patients had lower FEV1% (p = 0.003), FVC% (p = 0.004), pO2 and pCO2 (p < 0.001 for both) values compared with normocapnic patients. In binary regression analysis, which assessed various predictors on the likelihood of having hypercapnia, it was found that BMI (OR: 1.313, 95% CI: 1.048-1.646, p = 0.018) and FVC (OR: 0.913, 95% CI: 0.845-0.986, p = 0.020) were the major determinants of hypercapnia in OS patients. CONCLUSIONS Hypercapnic OS patients were more obese and sleepy and presented worse respiratory function in wakefulness and sleep hypoxia characteristics compared with normocapnic OS patients.
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Affiliation(s)
- Athanasios Voulgaris
- MSc Program in Sleep Medicine, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (A.V.); (K.A.); (D.S.)
- Department of Pneumonology, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
| | - Kostas Archontogeorgis
- MSc Program in Sleep Medicine, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (A.V.); (K.A.); (D.S.)
- Department of Pneumonology, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
| | - Konstantina Chadia
- Department of Pneumonology, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
| | - Dimitra Siopi
- MSc Program in Sleep Medicine, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (A.V.); (K.A.); (D.S.)
| | - Evangelia Nena
- Laboratory of Hygiene and Environmental Protection, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
| | - Paschalis Steiropoulos
- MSc Program in Sleep Medicine, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (A.V.); (K.A.); (D.S.)
- Department of Pneumonology, Medical School, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
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Zewari S, van den Borst B, van den Heuvel M, van den Elshout F, Sastry M, Vos P. Sleep Hypoventilation is Common in Diurnal Normocapnic COPD Patients with Severe or Very Severe Obstruction and is Not Associated with Body Mass Index. COPD 2023; 20:210-215. [PMID: 37486242 DOI: 10.1080/15412555.2023.2215324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 05/10/2023] [Accepted: 05/14/2023] [Indexed: 07/25/2023]
Abstract
Sleep hypoventilation (SH) is common in COPD patients with diurnal hypercapnia, however there are little data on the presence of SH in COPD patients with diurnal normocapnia. In this study the prevalence of SH in stable normocapnic COPD patients with severe or very severe obstruction (GOLD stages III and IV) was evaluated across body mass index (BMI) classes and associations between SH and body composition measures were explored. A total of 56 diurnal normocapnic COPD patients, of whom 17 normal-weight (COPDNW), 18 overweight (COPDOW) and 21 obese (COPDOB), underwent polysomnography to objectify SH and bioelectrical impedance analysis to assess body composition. The overall prevalence of SH was 66.1% and was not different across BMI classes. Logistic regression models indicated that SH was not associated with waist-to-hip ratio, body fat percentage and fat-free mass index. Our data indicate that SH is common in diurnal normocapnic COPD patients with severe or very severe obstruction and is not associated with BMI or body composition.
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Affiliation(s)
- Safir Zewari
- Department of Pulmonary Disease, Rijnstate hospital, Arnhem, The Netherlands
- Department of Pulmonary Disease, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bram van den Borst
- Department of Pulmonary Disease, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Michel van den Heuvel
- Department of Pulmonary Disease, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Manu Sastry
- Academic Sleep Center, CIRO, Horn, The Netherlands
| | - Petra Vos
- Department of Pulmonary Disease, Rijnstate hospital, Arnhem, The Netherlands
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Buras ED, Woo MS, Verma RK, Kondisetti SH, Davis CS, Claflin DR, Baran KC, Michele DE, Brooks SV, Chun TH. Thrombospondin-1 promotes fibro-adipogenic stromal expansion and contractile dysfunction of the diaphragm in obesity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.17.553733. [PMID: 37645822 PMCID: PMC10462153 DOI: 10.1101/2023.08.17.553733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Pulmonary disorders impact 40-80% of individuals with obesity. Respiratory muscle dysfunction is linked to these conditions; however, its pathophysiology remains largely undefined. Mice subjected to diet-induced obesity (DIO) develop diaphragmatic weakness. Increased intra-diaphragmatic adiposity and extracellular matrix (ECM) content correlate with reductions in contractile force. Thrombospondin-1 (THBS1) is an obesity-associated matricellular protein linked with muscular damage in genetic myopathies. THBS1 induces proliferation of fibro-adipogenic progenitors (FAPs)-mesenchymal cells that differentiate into adipocytes and fibroblasts. We hypothesized that THBS1 drives FAP-mediated diaphragm remodeling and contractile dysfunction in DIO. We tested this by comparing effects of dietary challenge on diaphragms of wild-type (WT) and Thbs1 knockout ( Thbs1 -/- ) mice. Bulk and single-cell transcriptomics demonstrated DIO-induced stromal expansion in WT diaphragms. Diaphragm FAPs displayed upregulation of ECM and TGFβ-related expression signatures, and augmentation of a Thy1 -expressing sub-population previously linked to type 2 diabetes. Despite similar weight gain, Thbs1 -/- mice were protected from these transcriptomic changes, and from obesity-induced increases in diaphragm adiposity and ECM deposition. Unlike WT controls, Thbs1 -/- diaphragms maintained normal contractile force and motion after DIO challenge. These findings establish THBS1 as a necessary mediator of diaphragm stromal remodeling and contractile dysfunction in overnutrition, and potential therapeutic target in obesity-associated respiratory dysfunction.
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Wu HM, Wang ZJ, Cheng CH, Su T, Wang J, Li YZ, Wang QJ, Han F, Chen R. Daytime Hypercapnia Impairs Working Memory in Young and Middle-Aged Patients with Obstructive Sleep Apnea Hypopnea Syndrome. Nat Sci Sleep 2023; 15:363-373. [PMID: 37220426 PMCID: PMC10200120 DOI: 10.2147/nss.s398440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 05/05/2023] [Indexed: 05/25/2023] Open
Abstract
Purpose Obstructive sleep apnea hypopnea syndrome (OSAHS) can lead to cognitive impairment, though few studies have so far examined hypercapnia as its causal mechanism, due to the invasive nature of conventional arterial CO2 measurement. The study aims to investigate the effects of daytime hypercapnia on working memory in young and middle-aged patients with OSAHS. Patients and Methods This prospective study screened 218 patients and eventually recruited 131 patients (aged 25-60 years) with polysomnography (PSG)-diagnosed OSAHS. Using a cut-off of 45mmHg daytime transcutaneous partial pressure of carbon dioxide (PtcCO2), 86 patients were assigned into the normocapnic group and 45 patients into the hypercapnic group. Working memory was evaluated using the Digit Span Backward Test (DSB) and the Cambridge Neuropsychological Test Automated Battery. Results Compared with the normocapnic group, the hypercapnic group performed worse in verbal, visual, and spatial working memory tasks. PtcCO2≥45mmHg was an independent predictor for lower DSB scores (OR=4.057), lower accuracy in the immediate Pattern Recognition Memory (OR=2.600), delayed Pattern Recognition Memory (OR=2.766) and Spatial Recognition Memory (OR=2.722) tasks, lower Spatial Span scores (OR=4.795), and more between errors in the Spatial Working Memory task (OR=2.734 and 2.558, respectively). Notably, PSG indicators of hypoxia and sleep fragmentation did not predict task performance. Conclusion Hypercapnia may be plays an important role in working memory impairment in patients with OSAHS, perhaps more so than hypoxia and sleep fragmentation. Routine CO2 monitoring in these patients could prove of utility in clinical practices.
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Affiliation(s)
- Hua-Man Wu
- Department of Respiratory, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
- Department of Respiratory and Critical Care Medicine, Zigong First People’s Hospital, Zigong, Sichuan, People’s Republic of China
| | - Zhi-Jun Wang
- Department of Respiratory, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
| | - Chao-Hong Cheng
- Department of Respiratory, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
| | - Tong Su
- Department of Respiratory, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
| | - Jing Wang
- Department of Respiratory, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
| | - Ye-Zhou Li
- School of Medicine, the University of Manchester, Manchester, UK
| | - Qiao-Jun Wang
- Department of Sleeping Center, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
| | - Fei Han
- Department of Sleeping Center, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
| | - Rui Chen
- Department of Respiratory, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
- Department of Sleeping Center, the Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People’s Republic of China
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Locke BW, Lee JJ, Sundar KM. OSA and Chronic Respiratory Disease: Mechanisms and Epidemiology. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19095473. [PMID: 35564882 PMCID: PMC9105014 DOI: 10.3390/ijerph19095473] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/22/2022] [Accepted: 04/23/2022] [Indexed: 02/06/2023]
Abstract
Obstructive sleep apnea (OSA) is a highly prevalent disorder that has profound implications on the outcomes of patients with chronic lung disease. The hallmark of OSA is a collapse of the oropharynx resulting in a transient reduction in airflow, large intrathoracic pressure swings, and intermittent hypoxia and hypercapnia. The subsequent cytokine-mediated inflammatory cascade, coupled with tractional lung injury, damages the lungs and may worsen several conditions, including chronic obstructive pulmonary disease, asthma, interstitial lung disease, and pulmonary hypertension. Further complicating this is the sleep fragmentation and deterioration of sleep quality that occurs because of OSA, which can compound the fatigue and physical exhaustion often experienced by patients due to their chronic lung disease. For patients with many pulmonary disorders, the available evidence suggests that the prompt recognition and treatment of sleep-disordered breathing improves their quality of life and may also alter the course of their illness. However, more robust studies are needed to truly understand this relationship and the impacts of confounding comorbidities such as obesity and gastroesophageal reflux disease. Clinicians taking care of patients with chronic pulmonary disease should screen and treat patients for OSA, given the complex bidirectional relationship OSA has with chronic lung disease.
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Elucidating Predictors of Obesity Hypoventilation Syndrome in a Large Bariatric Surgery Cohort. Ann Am Thorac Soc 2021; 17:1279-1288. [PMID: 32526148 DOI: 10.1513/annalsats.202002-135oc] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Rationale: Although understanding predictors of obesity hypoventilation syndrome (OHS), a condition associated with increased morbidity and mortality, is of key importance for risk prediction, existing characterization is limited.Objectives: We hypothesize that OHS patients referred for bariatric surgery have more severe obstructive sleep apnea and metabolic derangements compared with their eucapnic counterparts.Methods: A total of 1,718 patients undergoing polysomnography with end-tidal CO2 monitoring prior to bariatric surgery at Cleveland Clinic from September 2011 to September 2018 were included. OHS was defined by body mass index (BMI) ≥ 30 kg/m2 and either polysomnography-based end-tidal CO2 ≥ 45 mm Hg or serum bicarbonate levels ≥ 27 mEq/L based on the updated European Respiratory Society guidelines. Unadjusted and multivariable logistic regression models (odds ratio; 95% confidence interval) were used to examine OHS predictors consisting of factors in domains of patient characteristics, polysomnography (cardiorespiratory and sleep architecture), laboratory, and metabolic parameters.Results: The analytic sample comprised 1,718 patients with the following characteristics: age of 45.3 ± 12.1 years, 20.7% were male, BMI = 48.6 ± 9 kg/m2, and 63.6% were white individuals. OHS prevalence was 68.4%. Unadjusted analyses revealed a 1.5% increased odds of OHS (1.01; 1.00-1.03) per 1-unit BMI increase, 1.7% (1.02; 1.01-1.02) per 1% increase in sleep time SaO2 < 90%, 12% increase (1.12; 1.03-1.22) per 1-U increase in hemoglobin A1c, and 3.4% increased odds (1.03; 1.02-1.05) per 5-U increase in apnea-hypopnea index. The association of apnea-hypopnea index with OHS persisted after adjustment for age, sex, race, and BMI and its comorbidities (1.02; 1.01-1.04).Conclusions: OHS was highly prevalent in patients referred for bariatric surgery by more than two-thirds. Even after consideration of confounders including obesity, obstructive sleep apnea remained a strong OHS predictor, as were increasing age, male sex, nocturnal hypoxia, and impaired long-term glucose control. These findings can inform OHS risk stratification in bariatric surgery and set the stage for experimental studies to examine sleep-related respiratory and metabolic contributions to hypoventilation.
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7
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Fedele D, De Francesco A, Riso S, Collo A. Obesity, malnutrition, and trace element deficiency in the coronavirus disease (COVID-19) pandemic: An overview. Nutrition 2021; 81:111016. [PMID: 33059127 PMCID: PMC7832575 DOI: 10.1016/j.nut.2020.111016] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/24/2020] [Accepted: 08/29/2020] [Indexed: 02/06/2023]
Abstract
The world is currently facing the coronavirus disease (COVID-19) pandemic which places great pressure on health care systems and workers, often presents with severe clinical features, and sometimes requires admission into intensive care units. Derangements in nutritional status, both for obesity and malnutrition, are relevant for the clinical outcome in acute illness. Systemic inflammation, immune system impairment, sarcopenia, and preexisting associated conditions, such as respiratory, cardiovascular, and metabolic diseases related to obesity, could act as crucial factors linking nutritional status and the course and outcome of COVID-19. Nevertheless, vitamins and trace elements play an essential role in modulating immune response and inflammatory status. Overall, evaluation of the patient's nutritional status is not negligible for its implications on susceptibility, course, severity, and responsiveness to therapies, in order to perform a tailored nutritional intervention as an integral part of the treatment of patients with COVID-19. The aim of this study was to review the current data on the relevance of nutritional status, including trace elements and vitamin status, in influencing the course and outcome of the disease 3 mo after the World Health Organization's declaration of COVID-19 as a pandemic.
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Affiliation(s)
- Debora Fedele
- Dietetic and Clinical Nutrition Unit, San Giovanni Battista Hospital, Città della Salute e della Scienza, Turin, Italy.
| | - Antonella De Francesco
- Dietetic and Clinical Nutrition Unit, San Giovanni Battista Hospital, Città della Salute e della Scienza, Turin, Italy
| | - Sergio Riso
- Dietetic and Clinical Nutrition Unit, Maggiore della Carità Hospital, Novara, Italy
| | - Alessandro Collo
- Dietetic and Clinical Nutrition Unit, Maggiore della Carità Hospital, Novara, Italy
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Janssens JP, Michel F, Schwarz EI, Prella M, Bloch K, Adler D, Brill AK, Geenens A, Karrer W, Ogna A, Ott S, Rüdiger J, Schoch OD, Soler M, Strobel W, Uldry C, Gex G. Long-Term Mechanical Ventilation: Recommendations of the Swiss Society of Pulmonology. Respiration 2020; 99:1-36. [PMID: 33302274 DOI: 10.1159/000510086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 12/12/2022] Open
Abstract
Long-term mechanical ventilation is a well-established treatment for chronic hypercapnic respiratory failure (CHRF). It is aimed at improving CHRF-related symptoms, health-related quality of life, survival, and decreasing hospital admissions. In Switzerland, long-term mechanical ventilation has been increasingly used since the 1980s in hospital and home care settings. Over the years, its application has considerably expanded with accumulating evidence of beneficial effects in a broad range of conditions associated with CHRF. Most frequent indications for long-term mechanical ventilation are chronic obstructive pulmonary disease, obesity hypoventilation syndrome, neuromuscular and chest wall diseases. In the current consensus document, the Special Interest Group of the Swiss Society of Pulmonology reviews the most recent scientific literature on long-term mechanical ventilation and provides recommendations adapted to the particular setting of the Swiss healthcare system with a focus on the practice of non-invasive and invasive home ventilation in adults.
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Affiliation(s)
- Jean-Paul Janssens
- Division of Pulmonary Diseases, Geneva University Hospitals, Geneva, Switzerland,
| | - Franz Michel
- Klinik für Neurorehabilitation und Paraplegiologie, Basel, Switzerland
| | - Esther Irene Schwarz
- Department of Pulmonology and Sleep Disorders Centre, University Hospital of Zurich, Zurich, Switzerland
| | - Maura Prella
- Division of Pulmonary Diseases, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Konrad Bloch
- Department of Pulmonology and Sleep Disorders Centre, University Hospital of Zurich, Zurich, Switzerland
| | - Dan Adler
- Division of Pulmonary Diseases, Geneva University Hospitals, Geneva, Switzerland
| | | | - Aurore Geenens
- Pulmonary League of the Canton of Vaud, Lausanne, Switzerland
| | | | - Adam Ogna
- Respiratory Medicine Service, Locarno Regional Hospital, Locarno, Switzerland
| | - Sebastien Ott
- Universitätsklinik für Pneumologie, Universitätsspital (Inselspital) und Universität, Bern, Switzerland
- Division of Pulmonary Diseases, St. Claraspital, Basel, Switzerland
| | - Jochen Rüdiger
- Division of Pulmonary and Sleep Medicine, Medizin Stollturm, Münchenstein, Switzerland
| | - Otto D Schoch
- Division of Pulmonary Diseases, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Markus Soler
- Division of Pulmonary Diseases, St. Claraspital, Basel, Switzerland
| | - Werner Strobel
- Division of Pulmonary Diseases, Universitätsspital Basel, Basel, Switzerland
| | - Christophe Uldry
- Division of Pulmonary Diseases and Pulmonary Rehabilitation Center, Rolle Hospital, Rolle, Switzerland
| | - Grégoire Gex
- Division of Pulmonary Diseases, Geneva University Hospitals, Geneva, Switzerland
- Division of Pulmonary Diseases, Hôpital du Valais, Sion, Switzerland
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9
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Perioperative Care and Medication-related Hypoventilation. Sleep Med Clin 2020; 15:471-483. [PMID: 33131658 DOI: 10.1016/j.jsmc.2020.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Cumulative evidence supports the association of adverse postoperative outcomes with obstructive sleep apnea (OSA) and obesity hypoventilation syndrome (OHS). Although current guidelines recommend preoperative screening for OSA and OHS, the best perioperative management pathways remain unknown. Interventions attempting to prevent complications in the postoperative period largely are consensus based and focused on enhanced monitoring, conservative measures, and specific OSA therapies, such as positive airway pressure. Until further research is available to improve the quality and strength of these recommendations, patients with known or suspected OSA and OHS should be considered at higher risk for perioperative cardiopulmonary complications.
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10
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Braganza MV, Hanly PJ, Fraser KL, Tsai WH, Pendharkar SR. Predicting CPAP failure in patients with suspected sleep hypoventilation identified on ambulatory testing. J Clin Sleep Med 2020; 16:1555-1565. [PMID: 32501210 DOI: 10.5664/jcsm.8616] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
STUDY OBJECTIVES Home sleep apnea testing (HSAT) is commonly used to diagnose obstructive sleep apnea, but its role in identifying patients with suspected hypoventilation or predicting their response to continuous positive airway pressure (CPAP) therapy has not been assessed. The primary objective was to determine if HSAT, combined with clinical variables, could predict the failure of CPAP to correct nocturnal hypoxemia during polysomnography in a population with suspected hypoventilation. Secondary objectives were to determine if HSAT and clinical parameters could predict awake or sleep hypoventilation. METHODS A retrospective review was performed of 142 consecutive patients who underwent split-night polysomnography for suspected hypoventilation after clinical assessment by a sleep physician and review of HSAT. We collected quantitative indices of nocturnal hypoxemia, patient demographics, medications, pulmonary function tests, as well as arterial blood gas data from the night of the polysomnography . CPAP failure was defined as persistent obstructive sleep apnea, hypoxemia (oxygen saturation measured by pulse oximetry < 85%), or hypercapnia despite maximal CPAP. RESULTS Failure of CPAP was predicted by awake oxygen saturation and arterial blood gas results but not by HSAT indices of nocturnal hypoxemia. Awake oxygen saturation ≥ 94% ruled out CPAP failure, and partial pressure of oxygen measured by arterial blood gas ≥ 68 mmHg decreased the likelihood of CPAP failure significantly. CONCLUSIONS In patients with suspected hypoventilation based on clinical review and HSAT interpretation by a sleep physician, awake oxygen saturation measured by pulse oximetry and partial pressure of oxygen measured by arterial blood gas can reliably identify patients in whom CPAP is likely to fail. Additional research is required to determine the role of HSAT in the identification and treatment of patients with hypoventilation.
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Affiliation(s)
- Michael V Braganza
- Sleep Centre, Foothills Medical Centre, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Patrick J Hanly
- Sleep Centre, Foothills Medical Centre, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Kristin L Fraser
- Sleep Centre, Foothills Medical Centre, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Willis H Tsai
- Sleep Centre, Foothills Medical Centre, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Sachin R Pendharkar
- Sleep Centre, Foothills Medical Centre, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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Kimura Y, Kasai T, Tomita Y, Kasagi S, Takaya H, Kato M, Kawana F, Narui K. Relationship between metabolic syndrome and hypercapnia among obese patients with sleep apnea. World J Respirol 2020; 10:1-10. [DOI: 10.5320/wjr.v10.i1.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 12/16/2019] [Accepted: 12/23/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND In the obese patient population, some patients have severe obstructive sleep apnea (OSA) with daytime hypoventilation. Such patients are generally identified on the basis of the presence or absence of daytime hypercapnia, and the condition is called obesity hypoventilation syndrome. However, mechanisms for such daytime hypoventilation remain unclear.
AIM To investigate metabolic syndrome and daytime hypercapnia association based on hypercapnia prevalence in obese OSA patients in a nested case-control study.
METHODS Consecutive obese patients (body mass index ≥ 30 kg/m2) who underwent polysomnography due to suspected OSA were included. Among them, patients with severe OSA (apnea hypopnea index ≥ 30/h) were divided into two groups according to the presence or absence of hypercapnia during wakefulness (arterial partial pressure of carbon dioxide ≥ or < 45 Torr, respectively). The characteristics and clinical features of these two groups were compared.
RESULTS Among 97 eligible patients, 25 patients (25.8%) had daytime hypercapnia. There were no significant differences in age, gender, body mass index, apnea-hypopnea index, and Epworth Sleepiness Scale scores between the two groups. However, patients with hypercapnia had a significantly lower arterial partial pressure of oxygen level (75.8 ± 8.2 torr vs 79.9 ± 8.7 torr, P = 0.042) and higher arterial partial pressure of carbon dioxide level (46.6 ± 2.5 torr vs 41.0 ± 2.9 torr, P < 0.001). Additionally, patients with hypercapnia were more likely to have metabolic syndrome (72.0% vs 48.6%, P = 0.043) and a higher metabolic score (the number of satisfied criteria of metabolic syndrome). In multivariate logistic regression analysis, the presence of metabolic syndrome was associated with the presence of hypercapnia (OR = 2.85, 95%CI: 1.04-7.84, P = 0.042).
CONCLUSION Among obese patients with severe OSA, 26% of patients had hypercapnia during wakefulness. The presence of metabolic syndrome was independently correlated with the presence of daytime hypercapnia.
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Affiliation(s)
- Yuka Kimura
- Sleep Center, Clinical Physiology, Toranomon Hospital, Tokyo 105-8470, Japan
| | - Takatoshi Kasai
- Department of Cardiovascular Medicine, Cardiovascular Respiratory Sleep Medicine, Juntendo University Graduate School of Medicine; Sleep and Sleep Disordered Breathing Center, Juntendo University Hospital, Tokyo 113-8421, Japan
| | - Yasuhiro Tomita
- Sleep Center, Cardiovascular Center, Toranomon Hospital, Tokyo 105-8470, Japan
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | | | - Hisashi Takaya
- Sleep Center, and Department of Respiratory Medicine, Respiratory Center, Toranomon Hospital, Tokyo 105-8470, Japan
| | - Mitsue Kato
- Cardiovascular Respiratory Sleep Medicine, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Fusae Kawana
- Cardiovascular Respiratory Sleep Medicine, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Koji Narui
- Sleep Center, Toranomon Hospital, Tokyo 105-8470, Japan
- Cardiovascular Respiratory Sleep Medicine, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
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Pierucci P, Di Lecce V, Marra L, Resta O. Is there a threat of an increase in the rates of obesity hypoventilation syndrome? Expert Rev Respir Med 2019; 14:117-119. [PMID: 31709854 DOI: 10.1080/17476348.2020.1690992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Paola Pierucci
- Cardio-Thoracic Department, Respiratory and Sleep disorders Unit, Policlinic University hospital, UNIBA, Bari, Italy
| | - Valentina Di Lecce
- Cardio-Thoracic Department, Respiratory and Sleep disorders Unit, Policlinic University hospital, UNIBA, Bari, Italy
| | - Lorenzo Marra
- Cardio-Thoracic Department, Respiratory and Sleep disorders Unit, Policlinic University hospital, UNIBA, Bari, Italy
| | - Onofrio Resta
- Cardio-Thoracic Department, Respiratory and Sleep disorders Unit, Policlinic University hospital, UNIBA, Bari, Italy
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13
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Concerns regarding the use of continuous positive airway pressure to treat stable patients with obesity hypoventilation syndrome. Sleep Med 2019; 59:98. [DOI: 10.1016/j.sleep.2019.01.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 01/21/2019] [Indexed: 11/20/2022]
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14
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Athayde RABD, Oliveira Filho JRBD, Lorenzi Filho G, Genta PR. Obesity hypoventilation syndrome: a current review. ACTA ACUST UNITED AC 2019; 44:510-518. [PMID: 30726328 PMCID: PMC6459748 DOI: 10.1590/s1806-37562017000000332] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 02/11/2018] [Indexed: 02/06/2023]
Abstract
Obesity hypoventilation syndrome (OHS) is defined as the presence of obesity (body mass index ≥ 30 kg/m²) and daytime arterial hypercapnia (PaCO2 ≥ 45 mmHg) in the absence of other causes of hypoventilation. OHS is often overlooked and confused with other conditions associated with hypoventilation, particularly COPD. The recognition of OHS is important because of its high prevalence and the fact that, if left untreated, it is associated with high morbidity and mortality. In the present review, we address recent advances in the pathophysiology and management of OHS, the usefulness of determination of venous bicarbonate in screening for OHS, and diagnostic criteria for OHS that eliminate the need for polysomnography. In addition, we review advances in the treatment of OHS, including behavioral measures, and recent studies comparing the efficacy of continuous positive airway pressure with that of noninvasive ventilation.
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Affiliation(s)
- Rodolfo Augusto Bacelar de Athayde
- . Serviço de Pneumologia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil.,. Laboratório do Sono, Disciplina de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil
| | | | - Geraldo Lorenzi Filho
- . Laboratório do Sono, Disciplina de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil
| | - Pedro Rodrigues Genta
- . Laboratório do Sono, Disciplina de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil
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15
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Chung Y, Garden FL, Marks GB, Vedam H. Non-invasive positive airway pressure therapy for obesity hypoventilation syndrome in adults. Hippokratia 2018. [DOI: 10.1002/14651858.cd012976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yewon Chung
- Liverpool Hospital; Department of Respiratory and Sleep Medicine; Locked Bag 7103 Liverpool BC 1871 Australia
- Faculty of Medicine, University of New South Wales; South Western Sydney Clinical School; Sydney Australia
- Ingham Institute for Applied Medical Research; Liverpool Australia
| | - Frances L Garden
- Ingham Institute for Applied Medical Research; Liverpool Australia
- University of New South Wales; South Western Sydney Clinical School, Faculty of Medicine; Sydney Australia
| | - Guy B Marks
- Liverpool Hospital; Department of Respiratory and Sleep Medicine; Locked Bag 7103 Liverpool BC 1871 Australia
- Faculty of Medicine, University of New South Wales; South Western Sydney Clinical School; Sydney Australia
- Ingham Institute for Applied Medical Research; Liverpool Australia
| | - Hima Vedam
- Liverpool Hospital; Department of Respiratory and Sleep Medicine; Locked Bag 7103 Liverpool BC 1871 Australia
- Faculty of Medicine, University of New South Wales; South Western Sydney Clinical School; Sydney Australia
- Ingham Institute for Applied Medical Research; Liverpool Australia
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16
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Borel JC, Guerber F, Jullian-Desayes I, Joyeux-Faure M, Arnol N, Taleux N, Tamisier R, Pépin JL. Prevalence of obesity hypoventilation syndrome in ambulatory obese patients attending pathology laboratories. Respirology 2017; 22:1190-1198. [DOI: 10.1111/resp.13051] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Revised: 02/08/2017] [Accepted: 02/26/2017] [Indexed: 01/27/2023]
Affiliation(s)
- Jean-Christian Borel
- HP2 Laboratory, INSERM U1042, Grenoble Alpes University; Grenoble France
- AGIR à dom. Association; Meylan France
- EFCR Laboratory, Thorax and Vessels Division; Grenoble Alpes University Hospital; Grenoble France
| | | | | | - Marie Joyeux-Faure
- HP2 Laboratory, INSERM U1042, Grenoble Alpes University; Grenoble France
- EFCR Laboratory, Thorax and Vessels Division; Grenoble Alpes University Hospital; Grenoble France
| | - Nathalie Arnol
- AGIR à dom. Association; Meylan France
- EFCR Laboratory, Thorax and Vessels Division; Grenoble Alpes University Hospital; Grenoble France
| | | | - Renaud Tamisier
- HP2 Laboratory, INSERM U1042, Grenoble Alpes University; Grenoble France
- EFCR Laboratory, Thorax and Vessels Division; Grenoble Alpes University Hospital; Grenoble France
| | - Jean-Louis Pépin
- HP2 Laboratory, INSERM U1042, Grenoble Alpes University; Grenoble France
- EFCR Laboratory, Thorax and Vessels Division; Grenoble Alpes University Hospital; Grenoble France
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Pıhtılı A, Bingöl Z, Kıyan E. The Predictors of Obesity Hypoventilation Syndrome in Obstructive Sleep Apnea. Balkan Med J 2017; 34:41-46. [PMID: 28251022 PMCID: PMC5322510 DOI: 10.4274/balkanmedj.2015.1797] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Accepted: 02/11/2016] [Indexed: 12/01/2022] Open
Abstract
Background: As obesity increases, the frequency of obstructive sleep apnea and obesity hypoventilation syndrome increases also. However, obesity hypoventilation syndrome frequency is not known, as capnography and arterial blood gas analysis are not routinely performed in sleep laboratories. Aims: To investigate the frequency and predictors of obesity hypoventilation syndrome in obese subjects. Study Design: Retrospective clinical study. Methods: Obese subjects who had arterial blood gas analysis admitted to the sleep laboratory and polysomnography were retrospectively analyzed. Subjects with restrictive (except obesity) and obstructive pulmonary pathologies were excluded. Demographics, Epworth-Sleepiness-Scale scores, polysomnographic data, arterial blood gas analysis, and spirometric measurements were recorded. Results: Of the 419 subjects, 45.1% had obesity hypoventilation syndrome. Apnea hypopnea index (p<0.001), oxygen desaturation index (p<0.001) and sleep time with SpO2<90% (p<0.001) were statistically higher in subjects with obesity hypoventilation syndrome compared to subjects with eucapnic obstructive sleep apnea. The nocturnal mean SpO2 (p<0.001) and lowest SpO2 (p<0.001) were also statistically lower in subjects with obesity hypoventilation syndrome. Logistic regression analysis showed that the lowest SpO2, oxygen desaturation index, apnea hypopnea index and sleep time with SpO2 <90% were related factors for obesity hypoventilation syndrome. Conclusion: Obesity hypoventilation syndrome should be considered when oxygen desaturation index, apnea hypopnea index and sleep time with SpO2 <90% are high.
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Affiliation(s)
- Aylin Pıhtılı
- Department of Pulmonary Medicine, İstanbul Haydarpaşa Numune Training and Research Hospital, İstanbul, Turkey
| | - Züleyha Bingöl
- İstanbul University School of Medicine, Department of Pulmonary Medicine, İstanbul, Turkey
| | - Esen Kıyan
- İstanbul University School of Medicine, Department of Pulmonary Medicine, İstanbul, Turkey
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Argun Baris S, Tuncel D, Ozerdem C, Kutlu H, Onyilmaz T, Basyigit I, Boyaci H, Yildiz F. The effect of positive airway pressure therapy on neurocognitive functions, depression and anxiety in obesity hypoventilation syndrome. Multidiscip Respir Med 2016; 11:35. [PMID: 27766147 PMCID: PMC5057438 DOI: 10.1186/s40248-016-0071-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 07/18/2016] [Indexed: 01/22/2023] Open
Abstract
Background The aim of this study is to evaluate the presence of neurocognitive dysfunctions, depression and anxiety and the effect of positive airway pressure (PAP) therapy on these alterations in Obesity Hypoventilation Syndrome (OHS) patients. Methods Ten healthy normal and obese controls, 10 OHS and 10 OSAS patients were included in the study. Short form-36, Beck Depression Scale and State-Trade Anxiety Inventory (STAI 1-2) were performed. Wisconsin Card Sorting Test (WCST), Montreal Cognitive Assessment Scale (MOCA), Enhanced Cued Recall (ECR) and Mini Mental Test (MMT) were used for neurocognitive evaluation. All tests were repeated after one night PAP therapy in OHS and OSAS groups. Results OHS patients had the lowest scores of physical (PF) and social functioning (SF) in SF-36. The total number of persistent errors and incorrect answers were the highest in OHS group in WCST. The scores of MOCA, ECR and MMT were lower; depression and anxiety scores were higher in OHS group than in controls (p = 0,00). There was a significant increase in the completed categories in OHS after PAP therapy (p = 0,03). There were also significant increases in MOCA, ECR and MMT scores and significant decreases in depression and anxiety scores with respect to PAP therapy. Conclusions Cognitive dysfunction, depression and anxiety are important under-recognized comorbidities in OHS. It is suggested that short term PAP therapy had positive effects on neurocognitive functions, depression and anxiety but further multicentre, prospective studies with large number of cases are needed to evaluate the effect of long term PAP therapy on these parameters.
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Affiliation(s)
- Serap Argun Baris
- Department of Pulmonary Diseases, Kocaeli University School of Medicine, Umuttepe, İzmit, Kocaeli Turkey
| | - Dilek Tuncel
- Department of Pulmonary Diseases, Kocaeli University School of Medicine, Umuttepe, İzmit, Kocaeli Turkey
| | - Cigdem Ozerdem
- Department of Neurology, Derince Training and Research Hospital, İzmit, Kocaeli Turkey
| | - Huseyin Kutlu
- Department of Pyschiatry, Kocaeli University School of Medicine, İzmit, Kocaeli Turkey
| | - Tugba Onyilmaz
- Department of Pulmonary Diseases, Private Konak Hospital, İzmit, Kocaeli Turkey
| | - Ilknur Basyigit
- Department of Pulmonary Diseases, Kocaeli University School of Medicine, Umuttepe, İzmit, Kocaeli Turkey
| | - Hasim Boyaci
- Department of Pulmonary Diseases, Kocaeli University School of Medicine, Umuttepe, İzmit, Kocaeli Turkey
| | - Fusun Yildiz
- Department of Pulmonary Diseases, Kocaeli University School of Medicine, Umuttepe, İzmit, Kocaeli Turkey
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BaHammam AS, Pandi-Perumal SR, Piper A, Bahammam SA, Almeneessier AS, Olaish AH, Javaheri S. Gender differences in patients with obesity hypoventilation syndrome. J Sleep Res 2016; 25:445-53. [PMID: 26990045 DOI: 10.1111/jsr.12400] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/02/2016] [Indexed: 01/02/2023]
Abstract
The role of gender and menopause in obstructive sleep apnoea is well known; however, no study has reported the impact of gender on the clinical presentation and the nocturnal respiratory events in patients with obesity hypoventilation syndrome. Therefore, this study prospectively evaluated differences in the clinical characteristics of women and men with obesity hypoventilation syndrome in a large cohort of patients with obstructive sleep apnoea. During the study period, a total of 1973 patients were referred to the sleep clinic with clinical suspicion of obstructive sleep apnoea. All patients underwent overnight polysomnography, during which time spirometry, arterial blood samples and thyroid tests were routinely obtained. Among 1973 consecutive patients, 1693 (617 women) were diagnosed with obstructive sleep apnoea, among whom 144 suffered from obesity hypoventilation syndrome (96 women). The prevalence of obesity hypoventilation syndrome among women and men was 15.6% and 4.5%, respectively (P < 0.001). Women with obesity hypoventilation syndrome were significantly older than men with obesity hypoventilation syndrome (61.5 ± 11.9 years versus 49.1 ± 12.5 years, P < 0.001). Although there were no significant differences between genders regarding symptoms, body mass index, spirometric data or daytime PaCO2 , women with obesity hypoventilation syndrome suffered significantly more from hypertension, diabetes and hypothyroidism. The prevalence of obesity hypoventilation syndrome was higher in post-menopausal (21%) compared with pre-menopausal (5.3%) women (P < 0001). HCO3 and duration of SpO2 <90% were the only independent predictors of obesity hypoventilation syndrome. In conclusion, this study reported that among subjects referred to the sleep disorders clinic for evaluation of obstructive sleep apnoea, obesity hypoventilation syndrome is more prevalent in women than men, and that women with obesity hypoventilation syndrome suffer from significantly more co-morbidities. Post-menopausal women with obstructive sleep apnoea have the highest prevalence of obesity hypoventilation syndrome.
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Affiliation(s)
- Ahmed S BaHammam
- The University Sleep Disorders Center, Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Strategic Technologies Program of the National Plan for Sciences and Technology and Innovation in the Kingdom of Saudi Arabia, Riyadh, Saudi Arabia
| | | | - Amanda Piper
- Department of Respiratory and Sleep Medicine, Royal Prince Alfred Hospital, Camperdown, Australia.,Sleep and Circadian Group, Woolcock Institute of Medical Research, University of Sydney, Sydney, Australia
| | - Salman A Bahammam
- Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Aljohara S Almeneessier
- Department of Family and community Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Awad H Olaish
- The University Sleep Disorders Center, Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Strategic Technologies Program of the National Plan for Sciences and Technology and Innovation in the Kingdom of Saudi Arabia, Riyadh, Saudi Arabia
| | - Shahrokh Javaheri
- Division of Pulmonary and Sleep Medicine, Bethesda North Hospital, Cincinnati, OH, USA
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20
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Bingol Z, Pıhtılı A, Kıyan E. Modified STOP-BANG questionnaire to predict obesity hypoventilation syndrome in obese subjects with obstructive sleep apnea. Sleep Breath 2015; 20:495-500. [DOI: 10.1007/s11325-015-1213-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 05/15/2015] [Accepted: 05/29/2015] [Indexed: 10/23/2022]
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Abstract
This article summarizes available data on the obesity hypoventilation syndrome and its pertinence to intensivists, outlines clinical and pathophysiologic aspects of the disease, discusses multidisciplinary treatments, and reviews the available literature on outcomes specific to the critically ill patient.
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Affiliation(s)
- Shirley F Jones
- Division of Pulmonary Critical Care and Sleep Medicine, Department of Medicine, Baylor Scott &White Health, Texas A&M Health Science Center, 2401 South 31st Street, Temple, TX 76508, USA.
| | - Veronica Brito
- Division of Pulmonary Critical Care and Sleep Medicine, Department of Medicine, Baylor Scott &White Health, Texas A&M Health Science Center, 2401 South 31st Street, Temple, TX 76508, USA
| | - Shekhar Ghamande
- Division of Pulmonary Critical Care and Sleep Medicine, Department of Medicine, Baylor Scott &White Health, Texas A&M Health Science Center, 2401 South 31st Street, Temple, TX 76508, USA
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22
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Noninvasive Mechanical Ventilation in Patients With Obesity Hypoventilation Syndrome. Long-term Outcome and Prognostic Factors. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.arbr.2014.06.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Abstract
Obesity hypoventilation syndrome is a respiratory consequence of morbid obesity that is characterized by alveolar hypoventilation during sleep and wakefulness. The disorder involves a complex interaction between impaired respiratory mechanics, ventilatory drive and sleep-disordered breathing. Early diagnosis and treatment is important, because delay in treatment is associated with significant mortality and morbidity. Available treatment options include non-invasive positive airway pressure (PAP) therapies and weight loss. There is limited long-term data regarding the effectiveness of such therapies. This review outlines the current concepts of clinical presentation, diagnostic and management strategies to help identify and treat patients with obesity-hypoventilation syndromes.
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Alawami M, Mustafa A, Whyte K, Alkhater M, Bhikoo Z, Pemberton J. Echocardiographic and electrocardiographic findings in patients with obesity hypoventilation syndrome. Intern Med J 2015; 45:68-73. [DOI: 10.1111/imj.12620] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 10/27/2014] [Indexed: 11/27/2022]
Affiliation(s)
- M. Alawami
- Green Lane Cardiovascular Services; Auckland City Hospital; Auckland New Zealand
| | - A. Mustafa
- Green Lane Cardiovascular Services; Auckland City Hospital; Auckland New Zealand
| | - K. Whyte
- Respiratory Services; Auckland City Hospital; Auckland New Zealand
| | - M. Alkhater
- Respiratory Department; Waikato Hospital; Hamilton New Zealand
| | - Z. Bhikoo
- Respiratory Department; Waikato Hospital; Hamilton New Zealand
| | - J. Pemberton
- Green Lane Cardiovascular Services; Auckland City Hospital; Auckland New Zealand
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25
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Salepci B, Fidan A, Çağlayan B, Parmaksız E, Aktürk Ü, Kıral N, Cömert SŞ, Saraç G, Salepçi E. Overnight Transcutaneous Carbon Dioxide Monitoring in Eucapnic Patients with Obstructive Sleep Apnea Syndrome. Turk Thorac J 2015; 16:10-15. [PMID: 29404071 PMCID: PMC5783040 DOI: 10.5152/ttd.2014.4337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 08/29/2014] [Indexed: 11/22/2022]
Abstract
OBJECTIVES We monitored increases in CO2 levels during sleep by measuring transcutaneous pCO2 (PtcCO2) to determine its relationship with polysomnographic data in normocapnic patients with obstructive sleep apnea syndrome (OSAS). MATERIAL AND METHODS Between October 2011 and December 2012, 139 patients underwent PtcCO2 monitoring with polysomnography. All patients were evaluated with arterial blood gas (ABG) measurements and pulmonary function tests (PFTs). We excluded 13 patients with COPD and/or daytime hypercapnia and 29 patients whose PtcCO2 records could not be evaluated. RESULTS The patients' mean age was 46.8±10.3 years. Fifty-nine patients (60.8%) were male, and 38 (39.2%) patients were female. The mean overnight PtcCO2 was ≤45 mm Hg in 84 (86.6%) patients and >45 mm Hg in 13 (13.4%) patients. In the group with PtcCO2>45 mm Hg, 10 patients had an apnea-hypopnea index (AHI) >15, and 3 patients had an AHI<15, without a statistically significant difference (p=0.078). The mean apnea and apnea/interapnea periods were similar. The mean PtcCO2 values correlated with time spent when the SpO2 was <90% (r=0.220, p<0.031). When we grouped the patients by AHI, 60 (61.8%) patients had an AHI>15 (moderate to severe OSAS), and 37 (37.2%) had an AHI<15 (mild OSAS). Of the former group, 16.7% had a mean PtcCO2 >45 mm Hg, whereas this ratio was 8.1% in the latter group. The difference was not statistically significant (p=0.359). In the group with an AHI>15, the highest PtcCO2 levels were significantly higher (p<0.05). CONCLUSION We conclude that seemingly eucapnic OSAS patients may experience hypercapnia when sleeping, and PtcCO2 monitoring may be useful in the early diagnosis of hypercapnia.
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Affiliation(s)
- Banu Salepci
- Department of Chest Disease, Dr. Lütfi Kırdar Kartal Training and Research Hospital, İstanbul, Turkey
| | - Ali Fidan
- Department of Chest Disease, Dr. Lütfi Kırdar Kartal Training and Research Hospital, İstanbul, Turkey
| | - Benan Çağlayan
- Department of Chest Disease, Dr. Lütfi Kırdar Kartal Training and Research Hospital, İstanbul, Turkey
| | - Elif Parmaksız
- Department of Chest Disease, Dr. Lütfi Kırdar Kartal Training and Research Hospital, İstanbul, Turkey
| | - Ülkü Aktürk
- Department of Chest Disease, Dr. Lütfi Kırdar Kartal Training and Research Hospital, İstanbul, Turkey
| | - Nesrin Kıral
- Department of Chest Disease, Dr. Lütfi Kırdar Kartal Training and Research Hospital, İstanbul, Turkey
| | - Sevda Şener Cömert
- Department of Chest Disease, Dr. Lütfi Kırdar Kartal Training and Research Hospital, İstanbul, Turkey
| | - Gülşen Saraç
- Department of Chest Disease, Dr. Lütfi Kırdar Kartal Training and Research Hospital, İstanbul, Turkey
| | - Egehan Salepçi
- Department of Chest Disease, Trakya University Faculty of Medicine, Edirne, Turkey
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Hillman D, Singh B, McArdle N, Eastwood P. Relationships between ventilatory impairment, sleep hypoventilation and type 2 respiratory failure. Respirology 2014; 19:1106-16. [PMID: 25219542 DOI: 10.1111/resp.12376] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 07/18/2014] [Accepted: 07/20/2014] [Indexed: 01/25/2023]
Affiliation(s)
- David Hillman
- Department of Pulmonary Physiology and Sleep Medicine; Sir Charles Gairdner Hospital; Perth Western Australia Australia
- West Australian Sleep Disorders Research Institute; Sir Charles Gairdner Hospital; Perth Western Australia Australia
- Centre for Sleep Science; School of Anatomy, Physiology and Human Biology; University of Western Australia; Perth Western Australia Australia
| | - Bhajan Singh
- Department of Pulmonary Physiology and Sleep Medicine; Sir Charles Gairdner Hospital; Perth Western Australia Australia
- West Australian Sleep Disorders Research Institute; Sir Charles Gairdner Hospital; Perth Western Australia Australia
| | - Nigel McArdle
- Department of Pulmonary Physiology and Sleep Medicine; Sir Charles Gairdner Hospital; Perth Western Australia Australia
- West Australian Sleep Disorders Research Institute; Sir Charles Gairdner Hospital; Perth Western Australia Australia
- Centre for Sleep Science; School of Anatomy, Physiology and Human Biology; University of Western Australia; Perth Western Australia Australia
| | - Peter Eastwood
- Department of Pulmonary Physiology and Sleep Medicine; Sir Charles Gairdner Hospital; Perth Western Australia Australia
- West Australian Sleep Disorders Research Institute; Sir Charles Gairdner Hospital; Perth Western Australia Australia
- Centre for Sleep Science; School of Anatomy, Physiology and Human Biology; University of Western Australia; Perth Western Australia Australia
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27
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Harada Y, Chihara Y, Azuma M, Murase K, Toyama Y, Yoshimura C, Oga T, Nakamura H, Mishima M, Chin K. Obesity hypoventilation syndrome in Japan and independent determinants of arterial carbon dioxide levels. Respirology 2014; 19:1233-40. [PMID: 25208458 DOI: 10.1111/resp.12367] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 04/07/2014] [Accepted: 06/20/2014] [Indexed: 12/22/2022]
Abstract
BACKGROUND AND OBJECTIVE Obesity hypoventilation syndrome (OHS) prevalence was previously estimated at 9% in patients with obstructive sleep apnoea (OSA) in Japan. However, the definition of OSA in that study was based on an apnoea-hypopnoea index (AHI) of ≥ 20/h rather than ≥ 5/h. Therefore, the prevalence of OHS in OSA was not measured in the same way as for Western countries. Our study objectives were to investigate the characteristics of Japanese patients with OHS. METHODS Nine hundred eighty-one consecutive patients investigated for suspected OSA were enrolled. At least 90% of them were from urban areas, including 162 with obese OSA (body mass index (BMI) ≥ 30 kg/m(2) and AHI ≥ 5/h). RESULTS The prevalence of OHS (BMI 36.7 ± 4.9 kg/m(2) ) in OSA and that in obese OSA were 2.3% and 12.3%, respectively. Multiple regression analysis revealed that independent of age and BMI, arterial oxygen pressure (contribution rate (R(2) ) = 7.7%), 4% oxygen desaturation index (R(2) = 8.9%), carbon monoxide diffusing capacity/alveolar volume (R(2) = 8.3%), haemoglobin concentration (R(2) = 4.9%) and waist circumference (R(2) = 4.9%) were independently associated with arterial carbon dioxide pressure. After 12.3 ± 4.6 months of CPAP treatment, more than 60% of OHS patients no longer had hypercapnia. CONCLUSIONS The prevalence of OHS in OSA in Japan was 2.3%. The mean BMI of patients with OHS in Japan was lower than that in Western countries (36.7 kg/m(2) vs 44.0 kg/m(2) ).
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Affiliation(s)
- Yuka Harada
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Balachandran JS, Masa JF, Mokhlesi B. Obesity Hypoventilation Syndrome Epidemiology and Diagnosis. Sleep Med Clin 2014; 9:341-347. [PMID: 25360072 DOI: 10.1016/j.jsmc.2014.05.007] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jay S Balachandran
- Sleep Disorders Center, Section of Pulmonary and Critical Care, Department of Medicine, University of Chicago, 5841 South Maryland Avenue, Chicago, IL 60637, USA
| | - Juan Fernando Masa
- Pulmonary Division, San Pedro de Alcantara Hospital, Avda. Pablo Naranjo s/n, Caceres 10003, Spain ; CIBERES National Research Network, Avd. Montforte de Lemos 5, Pabellon 11, Madrid 28029, Spain
| | - Babak Mokhlesi
- Sleep Disorders Center, Section of Pulmonary and Critical Care, Department of Medicine, University of Chicago, 5841 South Maryland Avenue, Chicago, IL 60637, USA
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29
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30
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Esquinas AM, Marrero FL, Esteva JN. Effect of CPAP on long-term mortality in overlap syndrome: is hypercapnic the best appropriate determinant? Lung 2014; 192:631-2. [PMID: 24972640 DOI: 10.1007/s00408-014-9613-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 06/07/2014] [Indexed: 12/24/2022]
Abstract
Overlap syndrome and represents a complex clinical condition in pulmonary medicine. We discuss in this letter factors related with mortality after long-term effects CPAP and key differences between hypercapnic versus hypoxemic overlap patients.
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Affiliation(s)
- Antonio M Esquinas
- Intensive Care Unit and Non invasive Ventilatory Unit, Hospital Morales Meseguer, Avenida Marques Velez s/n, 30.008, Murcia, Spain,
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Bülbül Y, Ayik S, Ozlu T, Orem A. Frequency and predictors of obesity hypoventilation in hospitalized patients at a tertiary health care institution. Ann Thorac Med 2014; 9:87-91. [PMID: 24791171 PMCID: PMC4005167 DOI: 10.4103/1817-1737.128851] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 12/09/2013] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES Patients with obesity hypoventilation syndrome (OHS) have significant morbidity and mortality. Early diagnosis and treatment is important and there are limited data on its prevalence and predictive factors. The objective of this observational study was to determine the frequency and predictors of OHS in hospitalized patients at a tertiary health care institution. MATERIALS AND METHODS All blood gas analyses of hospitalized adult (age over 18 years) patients were prospectively recruited from the biochemistry laboratory at a tertiary health care center between August 2009 and July 2010. Patients who had hypercapnia (PaCO2 ≥ 45 mmHg) while breathing room air were included and clinical and laboratory data were obtained from hospital records. A standard questionnaire was also filled by face-to-face interview with patients and/or relatives. RESULTS A total of 9480 patients' arterial blood gases were evaluated and 330 patients (3.4%) who met the selection criteria were included in the analysis during the study period. Hypoventilation was associated with acute diseases in 64.2% and chronic diseases in 35.8% of the patients. Of the chronic hypoventilation patients, 24.4% had OHS. Univariate logistic regression analysis showed that, female gender, body mass index (BMI), smoking, PaO2, SaO2 and a PaCO2/BMI <1.5 were significantly related to OHS. In multivariate logistic regression analysis, BMI >35 kg/m(2), SaO2 <91.4% and PaCO2 /BMI <1.5 were significantly related to OHS. A PaCO2/BMI <1.5 was an independent variable strongly predictive of OHS (odds ratio: 36.9, 95% of the confidence interval: 2.75-492.95, P = 0.007). CONCLUSIONS OHS is a common cause of chronic alveolar hypoventilation. A careful examination PaCO2 /BMI ratio may prevent misdiagnoses among hypercapnic patients.
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Affiliation(s)
- Yilmaz Bülbül
- Department of Chest Diseases, School of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Sibel Ayik
- Department of Chest Diseases, School of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Tevfik Ozlu
- Department of Chest Diseases, School of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Asim Orem
- Department of Biochemistry, School of Medicine, Karadeniz Technical University, Trabzon, Turkey
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Macavei VM, Spurling KJ, Loft J, Makker HK. Diagnostic predictors of obesity-hypoventilation syndrome in patients suspected of having sleep disordered breathing. J Clin Sleep Med 2014; 9:879-84. [PMID: 23997700 DOI: 10.5664/jcsm.2986] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Obesity-hypoventilation syndrome (OHS) is associated with significant morbidity and mortality and requires measurement of arterial pCO2 for diagnosis. OBJECTIVE To determine diagnostic predictors of OHS among obese patients with suspected obstructive sleep apnea/hypopnea syndrome (OSAHS). METHODS Retrospective analysis of data on 525 sleep clinic patients (mean age 51.4 ± 12.7 years; 65.7% males; mean BMI 34.5 ± 8.1). All patients had sleep studies, and arterialized capillary blood gases (CBG) were measured in obese subjects (BMI > 30 kg/m2). RESULTS Of 525 patients, 65.5% were obese, 37.2% were morbidly obese (BMI > 40 kg/m2); 52.3% had confirmed OSAHS. Hypercapnia (pCO2 > 6 kPa or 45 mm Hg) was present in 20.6% obese and 22.1% OSAHS patients. Analysis of OHS predictors showed significant correlations between pCO2 and BMI, FEV1, FVC, AHI, mean and minimum nocturnal SpO2, sleep time with SpO2 < 90%, pO2, and calculated HCO3 from the CBG. PO2 and HCO3 were independent predictors of OHS, explaining 27.7% of pCO2 variance (p < 0.0001). A calculated HCO3 cutoff > 27 mmol/L had 85.7% sensitivity and 89.5% specificity for diagnosis of OHS, with 68.1% positive and 95.9% negative predictive value. CONCLUSION We confirmed a high prevalence of OHS in obese OSAHS patients (22.1%) and high calculated HCO3 level (> 27 mmol/L) to be a sensitive and specific predictor for the diagnosis of OHS.
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Affiliation(s)
- Vladimir M Macavei
- Sleep and Ventilation Unit, Department of Respiratory Medicine, North Middlesex University Hospital, London, UK.
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Mandal S, Suh ES, Boleat E, Asher W, Kamalanathan M, Lee K, Douiri A, Murphy PB, Steier J, Hart N. A cohort study to identify simple clinical tests for chronic respiratory failure in obese patients with sleep-disordered breathing. BMJ Open Respir Res 2014; 1:e000022. [PMID: 25478174 PMCID: PMC4212713 DOI: 10.1136/bmjresp-2014-000022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 03/07/2014] [Accepted: 03/12/2014] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Chronic respiratory failure complicating sleep-disordered breathing in obese patients has important adverse clinical implications in terms of morbidity, mortality and healthcare utilisation. Screening strategies are essential to identify obese patients with chronic respiratory failure. METHOD Prospective data were collected from patients with obesity-related sleep-disordered breathing admitted for respiratory assessment at a UK national sleep and ventilation centre. Hypercapnia was defined as an arterial partial pressure of carbon dioxide of >6kPa. RESULTS 245 obese patients (56±13 years) with a body mass index of 48±12 kg/m(2), forced vital capacity (FVC) of 2.1±1.1 L, daytime oximetry (SpO2) of 91±6% and abnormal overnight oximetry were included in the analysis. Receiver operator curve analysis for the whole group showed that an FVC ≤3 L had a sensitivity of 90% and a specificity of 41% in predicting hypercapnia, and an SpO2 ≤95% had a sensitivity of 83% and a specificity of 63% in predicting hypercapnia. Gender differences were observed and receiver operator curve analysis demonstrated 'cut-offs' for (1) SpO2 of ≤95% for men and ≤93% for women and (2) FVC of ≤3.5 L for men and ≤2.3 L for women, in predicting hypercapnia. CONCLUSIONS The measurement of FVC and clinic SpO2 in obese patients with abnormal overnight limited respiratory studies predicted hypercapnia. This may have clinical utility in stratifying patients attending sleep clinics.
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Affiliation(s)
- S Mandal
- Lane Fox Clinical Respiratory Physiology Research Centre, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust , London , UK ; Division of Asthma Allergy and Lung Biology , King's College London , London , UK
| | - E S Suh
- Lane Fox Clinical Respiratory Physiology Research Centre, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust , London , UK ; Division of Asthma Allergy and Lung Biology , King's College London , London , UK
| | - E Boleat
- Lane Fox Clinical Respiratory Physiology Research Centre, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust , London , UK
| | - W Asher
- Lane Fox Clinical Respiratory Physiology Research Centre, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust , London , UK
| | - M Kamalanathan
- Lane Fox Clinical Respiratory Physiology Research Centre, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust , London , UK
| | - K Lee
- Division of Asthma Allergy and Lung Biology , King's College London , London , UK ; Lane Fox Respiratory Unit , Guy's and St Thomas' NHS Foundation Trust , London , UK
| | - A Douiri
- Division of Health and Social Care Research , King's College London , London , UK ; Guy's and St Thomas' NHS Foundation Trust and King's College London, National Institute Health Research Biomedical Research Centre , London , UK
| | - P B Murphy
- Lane Fox Clinical Respiratory Physiology Research Centre, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust , London , UK ; Division of Asthma Allergy and Lung Biology , King's College London , London , UK
| | - J Steier
- Lane Fox Clinical Respiratory Physiology Research Centre, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust , London , UK ; Division of Asthma Allergy and Lung Biology , King's College London , London , UK ; Lane Fox Respiratory Unit , Guy's and St Thomas' NHS Foundation Trust , London , UK
| | - N Hart
- Lane Fox Clinical Respiratory Physiology Research Centre, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust , London , UK ; Division of Asthma Allergy and Lung Biology , King's College London , London , UK ; Lane Fox Respiratory Unit , Guy's and St Thomas' NHS Foundation Trust , London , UK ; Guy's and St Thomas' NHS Foundation Trust and King's College London, National Institute Health Research Biomedical Research Centre , London , UK
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Noninvasive mechanical ventilation in patients with obesity hypoventilation syndrome. Long-term outcome and prognostic factors. Arch Bronconeumol 2014; 51:61-68. [PMID: 24703500 DOI: 10.1016/j.arbres.2014.02.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 01/12/2014] [Accepted: 02/13/2014] [Indexed: 11/23/2022]
Abstract
INTRODUCTION Obesity is associated with 2 closely related respiratory diseases: obesity hypoventilation syndrome (OHS) and obstructive sleep apnea-hypopnea syndrome (OSAHS). It has been shown that noninvasive ventilation during sleep produces clinical and functional improvement in these patients. The long-term survival rate with this treatment, and the difference in clinical progress in OHS patients with and without OSAHS are analyzed. METHODOLOGY Longitudinal, observational study with a cohort of patients diagnosed with OHS, included in a home ventilation program over a period of 12 years, divided into 2 groups: pure OHS and OSAHS-associated OHS. Bi-level positive airway pressure ventilation was administered. During the follow-up period, symptoms, exacerbations and hospitalizations, blood gas tests and pulmonary function tests, and survival rates were monitored and compared. RESULTS Eighty-three patients were eligible for analysis, 60 women (72.3%) and 23 men (27.7%), with a mean survival time of 8.47 years. Fifty patients (60.2%) were included in the group without OSAHS (OHS) and 33 (39.8%) in the OSAHS-associated OHS group (OHS-OSAHS). PaCO₂ in the OHS group was significantly higher than in the OHS-OSAHS group (P<.01). OHS patients also had a higher hospitalization rate (P<.05). There was a significant improvement in both groups in FEV₁ and FVC, and no differences between groups in PaCO₂ and PaO₂ values. There were no differences in mortality between the 2 groups, but low FVC values were predictive of mortality. CONCLUSIONS The use of mechanical ventilation in patients with OHS, with or without OSAHS, is an effective treatment for the correction of blood gases and functional alterations and can achieve prolonged survival rates.
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Piper A. Obesity hypoventilation syndrome: therapeutic implications for treatment. Expert Rev Respir Med 2014; 4:57-70. [DOI: 10.1586/ers.09.64] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Laaban JP, Mounier L, Roque d’Orbcastel O, Melloni B, Cornette A, Muir JF. Histoire pondérale récente, avant l’institution de la pression positive continue, dans une cohorte de patients ayant un syndrome d’apnées-hypopnées obstructives du sommeil sévère. Rev Mal Respir 2014; 31:41-7. [PMID: 24461441 DOI: 10.1016/j.rmr.2013.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Accepted: 04/12/2013] [Indexed: 10/26/2022]
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Verbraecken J, McNicholas WT. Respiratory mechanics and ventilatory control in overlap syndrome and obesity hypoventilation. Respir Res 2013; 14:132. [PMID: 24256627 PMCID: PMC3871022 DOI: 10.1186/1465-9921-14-132] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 11/15/2013] [Indexed: 02/07/2023] Open
Abstract
The overlap syndrome of obstructive sleep apnoea (OSA) and chronic obstructive pulmonary disease (COPD), in addition to obesity hypoventilation syndrome, represents growing health concerns, owing to the worldwide COPD and obesity epidemics and related co-morbidities. These disorders constitute the end points of a spectrum with distinct yet interrelated mechanisms that lead to a considerable health burden. The coexistence OSA and COPD seems to occur by chance, but the combination can contribute to worsened symptoms and oxygen desaturation at night, leading to disrupted sleep architecture and decreased sleep quality. Alveolar hypoventilation, ventilation-perfusion mismatch and intermittent hypercapnic events resulting from apneas and hypopneas contribute to the final clinical picture, which is quite different from the “usual” COPD. Obesity hypoventilation has emerged as a relatively common cause of chronic hypercapnic respiratory failure. Its pathophysiology results from complex interactions, among which are respiratory mechanics, ventilatory control, sleep-disordered breathing and neurohormonal disturbances, such as leptin resistance, each of which contributes to varying degrees in individual patients to the development of obesity hypoventilation. This respiratory embarrassment takes place when compensatory mechanisms like increased drive cannot be maintained or become overwhelmed. Although a unifying concept for the pathogenesis of both disorders is lacking, it seems that these patients are in a vicious cycle. This review outlines the major pathophysiological mechanisms believed to contribute to the development of these specific clinical entities. Knowledge of shared mechanisms in the overlap syndrome and obesity hypoventilation may help to identify these patients and guide therapy.
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Affiliation(s)
- Johan Verbraecken
- Department of Pulmonary Medicine and Multidisciplinary Sleep Disorders Centre, Antwerp University Hospital and University of Antwerp, Wilrijkstraat 10, Edegem 2650, Belgium.
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Priou P, Trzepizur W, Gagnadoux F. Le syndrome obésité-hypoventilation: revue de la littérature. MEDECINE INTENSIVE REANIMATION 2013. [DOI: 10.1007/s13546-013-0697-4] [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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Affiliation(s)
- Edmond H.L. Chau
- Department of Anesthesiology, Toronto Western Hospital, University Health Network, University of Toronto, Bathurst Street, Toronto, Ontario M5T2S8, Canada
| | - Babak Mokhlesi
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, Sleep Disorders Center, University of Chicago Pritzker School of Medicine, Maryland Avenues, Chicago, IL 60637, USA
| | - Frances Chung
- Department of Anesthesiology, Toronto Western Hospital, University Health Network, University of Toronto, Bathurst Street, Toronto, Ontario M5T2S8, Canada
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Brillante R, Laks L, Cossa G, Peters M, Liu P. An overnight increase in CO2 predicts mortality in sleep disordered breathing. Respirology 2013; 17:933-9. [PMID: 22671994 DOI: 10.1111/j.1440-1843.2012.02209.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND OBJECTIVE Sleep disordered breathing (SDB) is highly prevalent but under-recognized. Evidence is accumulating for its role as a predictor of mortality independent of cardiovascular risk factors. The role of hypercapnia in SDB is not known systematically, and between 11 and 43% of patients with SDB develop chronic hypercapnia. Hypercapnia predicts mortality in other respiratory conditions. The role of hypercapnia in independently predicting mortality in patients with SDB after assessing for the presence of airways disease and obesity was investigated. METHODS The records of 396 consecutive patients were examined retrospectively. Univariate and multivariate analyses were performed using Cox proportional hazards regression to determine the association between gas exchange and polysomnography (PSG) variables and all-cause mortality, adjusted for potential confounders, including age, gender and presence of co-morbidity and airways disease. RESULTS The mean age of our patient population was 55 ± 15 years, and the mean body mass index (BMI) was 30.6 ± 6.2 kg/m2 . Out of the 322 patient population, 258 were men. After 10 years, 25% had died, following a maximum follow-up of 16.7 years. Mortality among patients with SDB was predicted by a difference between evening and morning PaCO2 (ΔPaCO2 ) of ≥7 mm Hg and evening hypoxaemia (PaO2 < 65 mm Hg), independent of age and the presence of co-morbidity and airways disease. There was a significant correlation between minimum oxygen saturation (SpO2 ) and ΔPaCO2 ≥ 7 mm Hg (P = 0.002) and evening PaO2 < 65 mm Hg (P < 0.001). CONCLUSIONS An overnight increase in CO2 and evening hypoxaemia are independent mortality predictors in SDB. A low minimum SpO2 identifies patients in whom morning and evening arterial blood gases are beneficial.
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Affiliation(s)
- Ruby Brillante
- Department of Thoracic and Sleep Medicine, Concord Hospital, New South Wales, Australia.
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41
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Randerath W. Obesitas-Hypoventilations-Syndrom. SOMNOLOGIE 2012. [DOI: 10.1007/s11818-012-0573-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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BOREL JEANCHRISTIAN, BOREL ANNELAURE, MONNERET DENIS, TAMISIER RENAUD, LEVY PATRICK, PEPIN JEANLOUIS. Obesity hypoventilation syndrome: From sleep-disordered breathing to systemic comorbidities and the need to offer combined treatment strategies. Respirology 2012; 17:601-10. [DOI: 10.1111/j.1440-1843.2011.02106.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Akinnusi ME, Saliba R, Porhomayon J, El-Solh AA. Sleep disorders in morbid obesity. Eur J Intern Med 2012; 23:219-26. [PMID: 22385877 DOI: 10.1016/j.ejim.2011.10.016] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 10/16/2011] [Accepted: 10/22/2011] [Indexed: 10/15/2022]
Abstract
The increasing prevalence of obesity has lead to an increase in the prevalence of sleep disordered breathing in the general population. The disproportionate structural characteristics of the pharyngeal airway and the diminished neural regulation of the pharyngeal dilating muscles during sleep predispose the obese patients to pharyngeal airway collapsibility. A subgroup of obese apneic patients is unable to compensate for the added load of obesity on the respiratory system, with resultant daytime hypercapnia. Weight loss using dietary modification and life style changes is the safest approach to reducing the severity of sleep apnea, but its efficacy is limited on the long run. Although it has inherent risks, bariatric surgery provides the most immediate result in alleviating sleep apnea. Obesity has been linked also to narcolepsy. The loss of neuropeptides co-localized in hypocretin neurons is suggested as the potential mechanism. Poor sleep quality, which leads to overall sleep loss and excessive daytime sleepiness has also become a frequent complaint in this population. Identifying abnormal nocturnal eating is critically important for patient care. Both sleep related eating disorder and night eating syndrome are treatable and represent potentially reversible forms of obesity.
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McKim DA, Road J, Avendano M, Abdool S, Côté F, Duguid N, Fraser J, Maltais F, Morrison DL, O’Connell C, Petrof BJ, Rimmer K, Skomro R. Home mechanical ventilation: a Canadian Thoracic Society clinical practice guideline. Can Respir J 2011; 18:197-215. [PMID: 22059178 PMCID: PMC3205101 DOI: 10.1155/2011/139769] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Increasing numbers of patients are surviving episodes of prolonged mechanical ventilation or benefitting from the recent availability of userfriendly noninvasive ventilators. Although many publications pertaining to specific aspects of home mechanical ventilation (HMV) exist, very few comprehensive guidelines that bring together all of the current literature on patients at risk for or using mechanical ventilatory support are available. The Canadian Thoracic Society HMV Guideline Committee has reviewed the available English literature on topics related to HMV in adults, and completed a detailed guideline that will help standardize and improve the assessment and management of individuals requiring noninvasive or invasive HMV. The guideline provides a disease-specific review of illnesses including amyotrophic lateral sclerosis, spinal cord injury, muscular dystrophies, myotonic dystrophy, kyphoscoliosis, post-polio syndrome, central hypoventilation syndrome, obesity hypoventilation syndrome, and chronic obstructive pulmonary disease as well as important common themes such as airway clearance and the process of transition to home. The guidelines have been extensively reviewed by international experts, allied health professionals and target audiences. They will be updated on a regular basis to incorporate any new information.
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Affiliation(s)
- Douglas A McKim
- Division of Respirology, University of Ottawa, and Respiratory Rehabilitation Services, Ottawa Hospital Sleep Centre, Ottawa, Ontario
| | - Jeremy Road
- Division of Respiratory Medicine and The Lung Centre, University of British Columbia, Provincial Respiratory Outreach Program, Vancouver, British Columbia
| | - Monica Avendano
- Respiratory Medicine, West Park Healthcare Centre, University of Toronto
| | - Steve Abdool
- Respiratory Medicine, West Park Healthcare Centre, University of Toronto
- Centre for Clinical Ethics at St Michael’s Hospital, West Park Healthcare Centre, and University of Toronto, Toronto, Ontario
| | | | - Nigel Duguid
- Eastern Health, Memorial University, St John’s, Newfoundland and Labrador
| | - Janet Fraser
- Respiratory Therapy Services, West Park Healthcare Centre, Toronto, Ontario
| | - François Maltais
- Research Centre, University Institute of Cardiology and Lung Health for Québec, Laval University, Québec, Québec
| | - Debra L Morrison
- Sleep Clinic and Laboratory, Queen Elizabeth II Health Sciences Centre and Dalhousie University, Halifax, Nova Scotia
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Rabec C, de Lucas Ramos P, Veale D. Respiratory complications of obesity. Arch Bronconeumol 2011; 47:252-61. [PMID: 21458904 DOI: 10.1016/j.arbres.2011.01.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 12/21/2010] [Accepted: 01/12/2011] [Indexed: 10/15/2022]
Abstract
Obesity, well known as a cardiovascular risk factor, can also lead to significant respiratory complications. The respiratory changes associated with obesity extend from a simple change in respiratory function, with no effect on gas exchange, to the more serious condition of hypercapnic respiratory failure, characteristic of obesity hypoventilation syndrome. More recently, it has been reported that there is an increased prevalence of asthma which is probably multifactorial in origin, but in which inflammation may play an important role. Hypoventilation in the obese subject is the result of complex interactions that involve changes in the ventilatory mechanics and anomalies in breathing control. Two other conditions (COPD and sleep apnea-hypopnea syndrome [SAHS], often present in obese patients, can trigger or aggravate it. The prevalence of hypoventilation in the obese is under-estimated and the diagnosis is usually established during an exacerbation, or when the patient is studied due to suspicion of SAHS. Ventilatory management of these patients includes either CPAP or NIV. The choice of one or another will depend on the underlying clinical condition and whether or not there is another comorbidity. Both NIV and CPAP have demonstrated their effectiveness, not only in the control of gas exchange, but also in improving the quality of life and survival of these patients.
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Affiliation(s)
- Claudio Rabec
- Service de Pneumologie et Réanimation Respiratoire, CHU Dijon, Francia.
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Abstract
Obesity is becoming a major medical concern in several parts of the world, with huge economic impacts on health- care systems, resulting mainly from increased cardiovascular risks. At the same time, obesity leads to a number of sleep-disordered breathing patterns like obstructive sleep apnea and obesity hypoventilation syndrome (OHS), leading to increased morbidity and mortality with reduced quality of life. OHS is distinct from other sleep- related breathing disorders although overlap may exist. OHS patients may have obstructive sleep apnea/hypopnea with hypercapnia and sleep hypoventilation, or an isolated sleep hypoventilation. Despite its major impact on health, this disorder is under-recognized and under-diagnosed. Available management options include aggressive weight reduction, oxygen therapy and using positive airway pressure techniques. In this review, we will go over the epidemiology, pathophysiology, presentation and diagnosis and management of OHS.
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Affiliation(s)
- Laila Al Dabal
- Department of Pulmonary Medicine, Rashid Hospital, Dubai Health Authority, UAE
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[Which pretherapeutic evaluation of a newly diagnosed patient with obstructive sleep apnea syndrome?]. Rev Mal Respir 2010; 27 Suppl 3:S124-36. [PMID: 21129621 DOI: 10.1016/s0761-8425(10)70018-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Mise en route d’une ventilation non invasive : pratiques actuelles et évolutions attendues. Enquêtes du groupe de travail CasaVNI. Rev Mal Respir 2010; 27:1022-9. [DOI: 10.1016/j.rmr.2010.09.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Accepted: 09/03/2010] [Indexed: 11/21/2022]
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