1
|
Thomas RJ. REM sleep breathing: Insights beyond conventional respiratory metrics. J Sleep Res 2024:e14270. [PMID: 38960862 DOI: 10.1111/jsr.14270] [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: 05/23/2024] [Accepted: 05/29/2024] [Indexed: 07/05/2024]
Abstract
Breathing and sleep state are tightly linked. The traditional approach to evaluation of breathing in rapid eye movement sleep has been to focus on apneas and hypopneas, and associated hypoxia or hypercapnia. However, rapid eye movement sleep breathing offers novel insights into sleep physiology and pathology, secondary to complex interactions of rapid eye movement state and cardiorespiratory biology. In this review, morphological analysis of clinical polysomnogram data to assess respiratory patterns and associations across a range of health and disease is presented. There are several relatively unique insights that may be evident by assessment of breathing during rapid eye movement sleep. These include the original discovery of rapid eye movement sleep and scoring of neonatal sleep, control of breathing in rapid eye movement sleep, rapid eye movement sleep homeostasis, sleep apnea endotyping and pharmacotherapy, rapid eye movement sleep stability, non-electroencephalogram sleep staging, influences on cataplexy, mimics of rapid eye movement behaviour disorder, a reflection of autonomic health, and insights into cardiac arrhythmogenesis. In summary, there is rich clinically actionable information beyond sleep apnea encoded in the respiratory patterns of rapid eye movement sleep.
Collapse
Affiliation(s)
- Robert Joseph Thomas
- Department of Medicine, Division of Pulmonary Critical Care & Sleep Medicine, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
2
|
Javaheri S, Badr MS. Central sleep apnea: pathophysiologic classification. Sleep 2023; 46:6584630. [PMID: 35551411 PMCID: PMC9995798 DOI: 10.1093/sleep/zsac113] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 05/05/2022] [Indexed: 11/14/2022] Open
Abstract
Central sleep apnea is not a single disorder; it can present as an isolated disorder or as a part of other clinical syndromes. In some conditions, such as heart failure, central apneic events are due to transient inhibition of ventilatory motor output during sleep, owing to the overlapping influences of sleep and hypocapnia. Specifically, the sleep state is associated with removal of wakefulness drive to breathe; thus, rendering ventilatory motor output dependent on the metabolic ventilatory control system, principally PaCO2. Accordingly, central apnea occurs when PaCO2 is reduced below the "apneic threshold". Our understanding of the pathophysiology of central sleep apnea has evolved appreciably over the past decade; accordingly, in disorders such as heart failure, central apnea is viewed as a form of breathing instability, manifesting as recurrent cycles of apnea/hypopnea, alternating with hyperpnea. In other words, ventilatory control operates as a negative-feedback closed-loop system to maintain homeostasis of blood gas tensions within a relatively narrow physiologic range, principally PaCO2. Therefore, many authors have adopted the engineering concept of "loop gain" (LG) as a measure of ventilatory instability and susceptibility to central apnea. Increased LG promotes breathing instabilities in a number of medical disorders. In some other conditions, such as with use of opioids, central apnea occurs due to inhibition of rhythm generation within the brainstem. This review will address the pathogenesis, pathophysiologic classification, and the multitude of clinical conditions that are associated with central apnea, and highlight areas of uncertainty.
Collapse
Affiliation(s)
- Shahrokh Javaheri
- Division of Pulmonary and Sleep Medicine, Bethesda North Hospital, Cincinnati, OH, USA.,Division of Pulmonary Critical Care and Sleep Medicine, University of Cincinnati, Cincinnati, OH, USA.,Division of Cardiology, Department of Medicine, Ohio State University, Columbus, OH, USA
| | - M Safwan Badr
- Department of Internal Medicine, Liborio Tranchida, MD, Endowed Professor of Medicine, Wayne State University School of Medicine, University Health Center, Detroit, MI, USA
| |
Collapse
|
3
|
Frange C, Franco AM, Brasil E, Hirata RP, Lino JA, Mortari DM, Ykeda DS, Leocádio-Miguel MA, D’Aurea CVR, Silva LOE, Telles SCL, Furlan SF, Peruchi BB, Leite CF, Yagihara FT, Campos LD, Ulhôa MA, Cruz MGDR, Beidacki R, Santos RB, de Queiroz SS, Barreto S, Piccin VS, Coelho FMS, Studart L, Assis M, Drager LF. Practice recommendations for the role of physiotherapy in the management of sleep disorders: the 2022 Brazilian Sleep Association Guidelines. Sleep Sci 2022; 15:515-573. [PMID: 36419815 PMCID: PMC9670776 DOI: 10.5935/1984-0063.20220083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Accepted: 09/19/2022] [Indexed: 08/13/2024] Open
Abstract
This clinical guideline supported by the Brazilian Sleep Association comprises a brief history of the development of Brazilian sleep physiotherapy, outlines the role of the physiotherapist as part of a sleep health team, and describes the clinical guidelines in respect of the management of some sleep disorders by the physiotherapist (including sleep breathing disorders, i.e., obstructive sleep apnea, central sleep apnea, upper airway resistance syndrome, hypoventilation syndromes and overlap syndrome, and pediatric sleep breathing disorders; sleep bruxism; circadian rhythms disturbances; insomnia; and Willis-Ekbom disease/periodic limb movement disorder. This clinical practice guideline reflects the state of the art at the time of publication and will be reviewed and updated as new information becomes available.
Collapse
Affiliation(s)
- Cristina Frange
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de
Medicina (EPM), Universidade Federal de São Paulo (UNIFESP) - São
Paulo - SP - Brazil
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
| | - Aline Marques Franco
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Departamento de Neurociências e Ciências do
Comportamento, Faculdade de Medicina de Ribeirão Preto, Universidade de
São Paulo (FMRP-USP) - Ribeirão Preto - SP - Brazil
| | - Evelyn Brasil
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Departamento de Terapia Intensiva, Hospital Israelita Albert
Einstein (HIAE) - São Paulo - SP - Brazil
| | - Raquel Pastrello Hirata
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Laboratório de Pesquisa em Fisioterapia Pulmonar,
Departamento de Fisioterapia, Universidade Estadual de Londrina (UEL) - Londrina -
PR - Brazil
| | - Juliana Arcanjo Lino
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Ciências Médicas, Universidade Federal do
Ceará (UFC) - Fortaleza - CE - Brazil
| | - Daiana Moreira Mortari
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Universidade Federal do Rio Grande do Sul - Porto Alegre - RS -
Brazil
| | - Daisy Satomi Ykeda
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Curso de Fisioterapia, Universidade Estadual do Piauí
(UESPI) - Teresina - PI - Brazil
| | - Mario André Leocádio-Miguel
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Departamento de Fisiologia e Comportamento, Universidade Federal do
Rio Grande do Norte - Natal - RN - Brazil
| | | | - Luciana Oliveira e Silva
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Departamento de Ciências da Saúde, Universidade
Federal de Uberlândia (UFU) - Uberlândia - MG - Brazil
| | | | - Sofia Fontanello Furlan
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Unidade de Hipertensão, Instituto do Coração
(InCor), Faculdade de Medicina, Universidade de São Paulo (USP) - São
Paulo - SP - Brazil
| | - Bruno Búrigo Peruchi
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Laboratório de Neurociência, Universidade do Estado
de Santa Catarina (UNESC) - Criciúma - SC - Brazil
| | - Camila Ferreira Leite
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Departamento de Fisioterapia, UFC; Programas de Mestrado em
Fisioterapia e Funcionalidade, e Mestrado em Ciências Cardiovasculares, UFC -
Fortaleza - CE - Brazil
| | - Fabiana Tokie Yagihara
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Setor de Neurofisiologia Clínica, Departamento de
Neurologia e Neurocirurgia, EPM, UNIFESP - São Paulo - SP - Brazil
| | | | - Melissa Araújo Ulhôa
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Instituto Metropolitano de Ensino Superior, Faculdade de Medicina
do Vale do Aço (UNIVAÇO) - Ipatinga - MG - Brazil
| | | | - Ricardo Beidacki
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Faculdade Inspirar, Unidade Porto Alegre - Porto Alegre - RS -
Brazil
| | - Ronaldo Batista Santos
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Departamento de Fisioterapia, Hospital Universitário, USP -
São Paulo - Brazil
| | | | - Simone Barreto
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Instituto do Sono, Associação Fundo Incentivo
à Pesquisa - São Paulo - Brazil
| | - Vivien Schmeling Piccin
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Laboratório do Sono, Divisão de Pneumologia do
Instituto do Coração (InCor), FMUSP, USP - São Paulo - SP -
Brazil
| | - Fernando Morgadinho Santos Coelho
- Departamento de Neurologia e Neurocirurgia, Escola Paulista de
Medicina (EPM), Universidade Federal de São Paulo (UNIFESP) - São
Paulo - SP - Brazil
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Departamento de Psicobiologia, EPM, UNIFESP - São Paulo -
SP - Brazil
| | - Luciana Studart
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Universidade Federal de Pernambuco - Recife - PE - Brazil
| | - Marcia Assis
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Clínica do Sono de Curitiba, Hospital São Lucas -
Curitiba - PR - Brazil
| | - Luciano F. Drager
- Associação Brasileira do Sono - São Paulo - SP
- Brazil
- Unidade de Hipertensão, Instituto do Coração
(InCor), Faculdade de Medicina, Universidade de São Paulo (USP) - São
Paulo - SP - Brazil
| |
Collapse
|
4
|
Wafa D, Bisschop Claire D, Benoit D. Regular short exposures to cold environment as an adjunct therapy for patients with sleep apnea syndrome (SAS). Med Hypotheses 2022. [DOI: 10.1016/j.mehy.2022.110795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
5
|
Hutter T, Horvath C, Hefti JP, Brill AK. [Treatment-Emergent Central Sleep Apnea - Detection and Treatment]. PRAXIS 2022; 111:436-443. [PMID: 35673844 DOI: 10.1024/1661-8157/a003848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Treatment-Emergent Central Sleep Apnea - Detection and Treatment Abstract. In treatment-emergent central sleep apnea (TECSA), affected patients with obstructive sleep apnea newly develop central sleep apnea (AHI central ≥5/h) under therapy with positive pressure ventilation which cannot be explained by other causes. The pathophysiology of TECSA is incompletely understood. PaCO2 and the associated apnea threshold seem to play a central role. The incidence of TECSA varies (1.8-20%), and in about 2/3 of cases it is self-limiting in the course of the therapy. If persistence or new onset occurs later in the course of positive pressure therapy, a further evaluation (e.g., echocardiography, neurologic examination, medication history) is indicated. Effective treatment options include a change in ventilation therapy (adaptive servoventilation or bilevel ventilation with back-up frequency) or additional nocturnal oxygen supplementation; these options should be decided case by case.
Collapse
Affiliation(s)
- Tabea Hutter
- Universitätsklinik für Pneumologie, Inselspital, Universitätsspital Bern, Universität Bern, Bern, Schweiz
| | - Christian Horvath
- Universitätsklinik für Pneumologie, Inselspital, Universitätsspital Bern, Universität Bern, Bern, Schweiz
- Sleep Research Laboratories of the University Health Network Toronto Rehabilitation Institute (KITE) and Toronto General Hospital and Department of Medicine of the University of Toronto, Toronto, Kanada
| | | | - Anne-Kathrin Brill
- Universitätsklinik für Pneumologie, Inselspital, Universitätsspital Bern, Universität Bern, Bern, Schweiz
| |
Collapse
|
6
|
Abstract
Treatment-emergent central sleep apnea (TECSA) is a specific form of sleep-disordered breathing, characterized by the emergence or persistence of central apneas during treatment for obstructive sleep apnea. The purpose of this review was to summarize the definition, epidemiology, potential mechanisms, clinical characteristics, and treatment of TECSA. We searched for relevant articles up to January 31, 2020, in the PubMed database. The prevalence of TECSA varied widely in different studies. The potential mechanisms leading to TECSA included ventilatory control instability, low arousal threshold, activation of lung stretch receptors, and prolonged circulation time. TECSA may be a self-limited disorder in some patients and could be resolved spontaneously over time with ongoing treatment of continuous positive airway pressure (CPAP). However, central apneas persist even with the regular CPAP therapy in some patients, and new treatment approaches such as adaptive servo-ventilation may be necessary. We concluded that several questions regarding TECSA remain, despite the findings of many studies, and it is necessary to carry out large surveys with basic scientific design and clinical trials for TECSA to clarify these irregularities. Further, it will be vital to evaluate the baseline demographic and polysomnographic data of TECSA patients more carefully and comprehensively.
Collapse
|
7
|
Oppersma E, Ganglberger W, Sun H, Thomas RJ, Westover MB. Algorithm for automatic detection of self-similarity and prediction of residual central respiratory events during continuous positive airway pressure. Sleep 2021; 44:5924368. [PMID: 33057718 PMCID: PMC8631077 DOI: 10.1093/sleep/zsaa215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 10/05/2020] [Indexed: 12/02/2022] Open
Abstract
Study Objectives Sleep-disordered breathing is a significant risk factor for cardiometabolic and neurodegenerative diseases. High loop gain (HLG) is a driving mechanism of central sleep apnea or periodic breathing. This study presents a computational approach that identifies “expressed/manifest” HLG via a cyclical self-similarity feature in effort-based respiration signals. Methods Working under the assumption that HLG increases the risk of residual central respiratory events during continuous positive airway pressure (CPAP), the full night similarity, computed during diagnostic non-CPAP polysomnography (PSG), was used to predict residual central events during CPAP (REC), which we defined as central apnea index (CAI) higher than 10. Central apnea labels are obtained both from manual scoring by sleep technologists and from an automated algorithm developed for this study. The Massachusetts General Hospital sleep database was used, including 2466 PSG pairs of diagnostic and CPAP titration PSG recordings. Results Diagnostic CAI based on technologist labels predicted REC with an area under the curve (AUC) of 0.82 ± 0.03. Based on automatically generated labels, the combination of full night similarity and automatically generated CAI resulted in an AUC of 0.85 ± 0.02. A subanalysis was performed on a population with technologist-labeled diagnostic CAI higher than 5. Full night similarity predicted REC with an AUC of 0.57 ± 0.07 for manual and 0.65 ± 0.06 for automated labels. Conclusions The proposed self-similarity feature, as a surrogate estimate of expressed respiratory HLG and computed from easily accessible effort signals, can detect periodic breathing regardless of admixed obstructive features such as flow limitation and can aid the prediction of REC.
Collapse
Affiliation(s)
- Eline Oppersma
- Cardiovascular and Respiratory Physiology Group, TechMed Centre, University of Twente, The Netherlands
| | | | - Haoqi Sun
- Department of Neurology, Massachusetts General Hospital, Boston, MA
| | - Robert J Thomas
- Department of Medicine, Beth Israel Deaconess Medical Center, Division of Pulmonary, Critical Care & Sleep Medicine, Harvard Medical School, Boston, MA
| | | |
Collapse
|
8
|
Wood C, Bianchi MT, Yun CH, Shin C, Thomas RJ. Multicomponent Analysis of Sleep Using Electrocortical, Respiratory, Autonomic and Hemodynamic Signals Reveals Distinct Features of Stable and Unstable NREM and REM Sleep. Front Physiol 2020; 11:592978. [PMID: 33343390 PMCID: PMC7744633 DOI: 10.3389/fphys.2020.592978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 11/13/2020] [Indexed: 12/05/2022] Open
Abstract
A new concept of non-rapid eye movement (NREM) and rapid eye movement (REM) sleep is proposed, that of multi-component integrative states that define stable and unstable sleep, respectively, NREMS, NREMUS REMS, and REMUS. Three complementary data sets are used: obstructive sleep apnea (20), healthy subjects (11), and high loop gain sleep apnea (50). We use polysomnography (PSG) with beat-to-beat blood pressure monitoring, and electrocardiogram (ECG)-derived cardiopulmonary coupling (CPC) analysis to demonstrate a bimodal, rather than graded, characteristic of NREM sleep. Stable NREM (NREMS) is characterized by high probability of occurrence of the <1 Hz slow oscillation, high delta power, stable breathing, blood pressure dipping, strong sinus arrhythmia and vagal dominance, and high frequency CPC. Conversely, unstable NREM (NREMUS) has the opposite features: a fragmented and discontinuous <1 Hz slow oscillation, non-dipping of blood pressure, unstable respiration, cyclic variation in heart rate, and low frequency CPC. The dimension of NREM stability raises the possibility of a comprehensive integrated multicomponent network model of NREM sleep which captures sleep onset (e.g., ventrolateral preoptic area-based sleep switch) processes, synaptic homeostatic delta power kinetics, and the interaction of global and local sleep processes as reflected in the spatiotemporal evolution of cortical “UP” and “DOWN” states, while incorporating the complex dynamics of autonomic-respiratory-hemodynamic systems during sleep. Bimodality of REM sleep is harder to discern in health. However, individuals with combined obstructive and central sleep apnea allows ready recognition of REMS and REMUS (stable and unstable REM sleep, respectively), especially when there is a discordance of respiratory patterns in relation to conventional stage of sleep.
Collapse
Affiliation(s)
- Christopher Wood
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, United States
| | - Matt Travis Bianchi
- Division of Sleep Medicine, Department of Neurology, Massachusetts General Hospital, Boston, MA, United States
| | - Chang-Ho Yun
- Department of Neurology, Bundang Clinical Neuroscience Center, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Chol Shin
- Division of Pulmonary, Sleep and Critical Care Medicine, Department of Internal Medicine, Korea University Ansan Hospital, Ansan, South Korea
| | - Robert Joseph Thomas
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, United States
| |
Collapse
|
9
|
Guyot P, Djermoune EH, Chenuel B, Bastogne T. A signal demodulation-based method for the early detection of Cheyne-Stokes respiration. PLoS One 2020; 15:e0221191. [PMID: 32163424 PMCID: PMC7067451 DOI: 10.1371/journal.pone.0221191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 02/20/2020] [Indexed: 11/30/2022] Open
Abstract
Cheyne-Stokes respiration (CSR) is a sleep-disordered breathing characterized by recurrent central apneas alternating with hyperventilation exhibiting a crescendo-decrescendo pattern of tidal volume. This respiration is reported in patients with heart failure, stroke or damage in respiratory centers. It increases mortality for patients with severe heart failure as it has adverse impacts on the cardiac function. Early stage of CSR, also called periodic breathing, is often undiagnosed as it only provokes hypopneas instead of apneas, which are much more difficult to detect. This paper demonstrates the proof of concept of a new method devoted to the early detection of CSR. The proposed approach relies on a signal demodulation technique applied to ventilation signals measured on 15 patients with chronic heart failure whose respiration goes from normal to severe CSR. Based on a modulation index and its instantaneous frequency, oscillation zones are detected and classified into three categories: CSR, periodic breathing and no abnormal pattern. The modulation index is used as an efficient indicator to quantify the degree of certainty of the pathology for each patient. Results show high correlation with experts’ annotations with sensitivity and specificity values of 87.1% and 89.8% respectively. A final decision leads to a classification which is confirmed by the experts’ conclusions.
Collapse
Affiliation(s)
- Pauline Guyot
- CRAN UMR 7039, Université de Lorraine, CNRS, Vandœuvre-lès-Nancy, France
- * E-mail:
| | - El-Hadi Djermoune
- CRAN UMR 7039, Université de Lorraine, CNRS, Vandœuvre-lès-Nancy, France
| | - Bruno Chenuel
- EA 3450 DevAH, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Thierry Bastogne
- CRAN UMR 7039, Université de Lorraine, CNRS, Vandœuvre-lès-Nancy, France
- INRIA, BIGS, Vandœuvre-lès-Nancy, France
| |
Collapse
|
10
|
Gunn S, Naik S, Bianchi MT, Thomas RJ. Estimation of adaptive ventilation success and failure using polysomnogram and outpatient therapy biomarkers. Sleep 2019; 41:4868556. [PMID: 29471442 DOI: 10.1093/sleep/zsy033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Indexed: 11/14/2022] Open
Abstract
Study Objectives Adaptive servo-ventilation (ASV) devices provide anticyclic pressure support for the treatment of central and/or complex sleep apnea, including heart failure patients. Variability in responses in the clinic and negative clinical trials motivated assessment of standard and novel signal biomarkers for ASV efficacy. Methods Multiple clinical databases were queried to assess potential signal biomarkers of ASV effectiveness, including the following: (1) attended laboratory adaptive ventilation titrations: 108, of which 66 had mainstream ETCO2 measurements; (2) AirView data in 98 participants, (3) complete data, from diagnostic polysomnogram (PSG) through review and prospective analysis of on-therapy data using SleepyHead freeware in 44 participants; and (4) hemodynamic data in the form of beat-to-beat blood pressure during ASV titration, using a Finometer in five participants. Results Signal biomarkers of reduced ASV efficacy were noted as follows: (1) an arousal index which markedly exceeded the respiratory event index during positive pressure titration; (2) persistent pressure cycling during long-term ASV therapy, visible in online review systems or reviewing data using freeware; (3) the ASV-associated pressure cycling induced arousals, sleep fragmentation, and blood pressure surges; and (4) elevated ratios of 95th percentile to median tidal volume, minute ventilation, and respiratory rate were associated with pressure cycling. High intraclass coefficients (>0.8) for machine apnea-hypopnea index and other extractable metrics were consistent with stability of patterns over multiple nights of use. Global clinical outcomes correlated negatively with pressure cycling. Conclusions Potential polysomnographic- and device-related signal biomarkers of ASV efficacy are described and may allow improved estimation of therapeutic effectiveness of adaptive ventilation.
Collapse
Affiliation(s)
- Stacey Gunn
- Division of Pulmonary, Critical Care and Sleep, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA
| | - Sreelatha Naik
- Division of Pulmonary, Critical Care and Sleep, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA
| | - Matt Travis Bianchi
- Division of Sleep Medicine, Department of Neurology, Massachusetts General Hospital, Boston, MA
| | - Robert Joseph Thomas
- Division of Pulmonary, Critical Care and Sleep, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA
| |
Collapse
|
11
|
Abstract
Complex sleep apnea syndrome (Comp-SAS) is the term used to describe a specific form of sleep disordered breathing characterized by the arise of central sleep apnea in patient with previous obstructive sleep apnea syndrome (OSAS) treated with continuous positive airway pressure devices (CPAP). The mechanisms of its occurrence are not well understood, but partly it seems to be a consequence of increased carbon dioxide elimination under positive airway pressure treatment and related improvement of pulmonary ventilation. The prevalence of Comp-SAS ranges from 5% to 20% of OSAS patient getting CPAP therapy with no significant predictors in comparison with simple obstructive sleep apnea, but more likely to happened in older males with more severe OSAS and accompanying cardiovascular pathology such as ischemic heart disease, atrial fibrillation and heart failure. In most cases of Comp-SAS, central apnea events are transient and disappear after continuous CPAP therapy use for 1 to 2 months. Novel treatment options like adaptive servo-ventilation or BiPAP-ST are available for such non-responders to CPAP but contra-indicated to patients with systolic heart failure. From the other hand, still not clear is it mandatory to treat all affected individuals with Comp-SAS if the disease is uncomplicated and patient is asymptomatic.
Collapse
Affiliation(s)
- A D Palman
- Sechenov First Moscow State Medical University, Moscow, Russia
| |
Collapse
|
12
|
Autonomic regulation during sleep and wakefulness: a review with implications for defining the pathophysiology of neurological disorders. Clin Auton Res 2018; 28:509-518. [PMID: 30155794 DOI: 10.1007/s10286-018-0560-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/18/2018] [Indexed: 02/07/2023]
Abstract
Cardiovascular and respiratory parameters change during sleep and wakefulness. This observation underscores an important, albeit incompletely understood, role for the central nervous system in the differential regulation of autonomic functions. Understanding sleep/wake-dependent sympathetic modulations provides insights into diseases involving autonomic dysfunction. The purpose of this review was to define the central nervous system nuclei regulating sleep and cardiovascular function and to identify reciprocal networks that may underlie autonomic symptoms of disorders such as insomnia, sleep apnea, restless leg syndrome, rapid eye movement sleep behavior disorder, and narcolepsy/cataplexy. In this review, we examine the functional and anatomical significance of hypothalamic, pontine, and medullary networks on sleep, cardiovascular function, and breathing.
Collapse
|
13
|
Schmickl CN, Owens RL, Edwards BA, Malhotra A. OSA Endotypes: What Are They and What Are Their Potential Clinical Implications? CURRENT SLEEP MEDICINE REPORTS 2018. [DOI: 10.1007/s40675-018-0121-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
14
|
Peng YJ, Zhang X, Nanduri J, Prabhakar NR. Therapeutic Targeting of the Carotid Body for Treating Sleep Apnea in a Pre-clinical Mouse Model. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1071:109-114. [PMID: 30357741 DOI: 10.1007/978-3-319-91137-3_14] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Sleep apnea with periodic cessation of breathing during sleep is a highly prevalent respiratory disorder affecting an estimated 10% of adults. Patients with sleep apnea exhibit several co-morbidities including hypertension, stroke, disrupted sleep, and neurocognitive and metabolic complications. Emerging evidence suggests that a hyperactive carotid body (CB) chemo reflex is an important driver of apneas in sleep apnea patients. Gasotransmitters carbon monoxide (CO) and hydrogen sulfide (H2S) play important roles in oxygen sensing by the CB. We tested the hypothesis that an augmented CB chemo reflex stemming from disrupted CO-H2S signaling may lead to sleep apnea. This possibility was tested in mice deficient in hemeoxygenase-2 (HO-2), an enzyme involved in CO synthesis, which were shown to exhibit hyperactive CB activity due to high H2S levels. We found that HO-2-/- mice exhibit a high incidence of apneas during sleep compared to wild type mice. Blocking the CB hyperactivity with L-propargylglycine, an inhibitor of cystathionine-γ-lyase (CSE), which catalyzes H2S synthesis, prevented apneas in HO-2-/- mice. These findings suggest that targeting CB with inhibitors of CSE might be a novel therapeutic strategy for preventing sleep apnea.
Collapse
Affiliation(s)
- Ying-Jie Peng
- Institute for Integrative Physiology and Center for Systems Biology of Oxygen Sensing, Biological Sciences Division, University of Chicago, Chicago, IL, USA
| | - Xiuli Zhang
- Institute for Integrative Physiology and Center for Systems Biology of Oxygen Sensing, Biological Sciences Division, University of Chicago, Chicago, IL, USA
| | - Jayasri Nanduri
- Institute for Integrative Physiology and Center for Systems Biology of Oxygen Sensing, Biological Sciences Division, University of Chicago, Chicago, IL, USA
| | - Nanduri R Prabhakar
- Institute for Integrative Physiology and Center for Systems Biology of Oxygen Sensing, Biological Sciences Division, University of Chicago, Chicago, IL, USA.
| |
Collapse
|
15
|
Nigam G, Riaz M, Chang ET, Camacho M. Natural history of treatment-emergent central sleep apnea on positive airway pressure: A systematic review. Ann Thorac Med 2018; 13:86-91. [PMID: 29675059 PMCID: PMC5892094 DOI: 10.4103/atm.atm_321_17] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION: Treatment-emergent central sleep apnea (TECSA) is observed in some patients when they are treated with positive airway pressure (PAP) after significant resolution of the preexisting obstructive events in patients with obstructive sleep apnea. The objective of this study was to systematically review the literature for studies describing the natural history of TECSA. METHODS: PubMed, Medline, Scopus, Web of Science, and Cochran Library databases were searched through June 29, 2017. RESULTS: Five studies were identified that discussed the natural history of TECSA. TECSA developed in 3.5%–19.8% of PAP-treated patients. Treatment-persistent central sleep apnea (TPCSA), representing protracted periods of PAP therapy-related central apneas, was noted in 14.3%–46.2% of patients with TECSA. Delayed-TECSA (D-TECSA) represents an anomalous TECSA entity appearing weeks to months after initial PAP therapy. D-TECSA was observed in 0.7%–4.2% of OSA patients undergoing PAP treatment (after at least 1 month). In patients with TECSA, a higher apnea–hypopnea index (AHI) and central apnea index at their baseline study or a higher residual AHI at their titration study may be associated with an increased likelihood of conversion to TPCSA. CONCLUSIONS: Overall, TECSA developed in 3.5%–19.8% of PAP-treated patients with OSA. The vast majority will experience complete resolution of central apneas over a few weeks to months. Unfortunately, about a third of patients with TECSA may continue to exhibit persistence of central sleep apnea on reevaluation. A small proportion may experience D-TECSA after few weeks to several months of initial exposure to PAP therapy.
Collapse
Affiliation(s)
- Gaurav Nigam
- Division of Sleep Medicine, Clay County Hospital, Flora, IL, USA
| | - Muhammad Riaz
- Division of Sleep Medicine, Astria Health Center, Grandview, WA, USA
| | - Edward T Chang
- Division of Otolaryngology, Sleep Surgery, and Sleep Medicine, Tripler Army Medical Center, HI, USA
| | - Macario Camacho
- Division of Otolaryngology, Sleep Surgery, and Sleep Medicine, Tripler Army Medical Center, HI, USA
| |
Collapse
|
16
|
Complex sleep apnea after full-night and split-night polysomnography: the Greek experience. Sleep Breath 2017; 22:713-719. [PMID: 29222618 DOI: 10.1007/s11325-017-1601-7] [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: 08/31/2017] [Revised: 11/18/2017] [Accepted: 11/30/2017] [Indexed: 10/18/2022]
Abstract
PURPOSE Treatment-emergent central sleep apnea (TE-CSA) is defined as the emergence or persistence of central respiratory events during the initiation of positive airway pressure (PAP) without a back-up rate in obstructive sleep apnea (OSA) patients and after significant resolution of obstructive events. Previous studies have estimated a prevalence from 0.56 to 20.3%. The aim of this study was to establish the prevalence of TE-CSA in a Greek adult population. METHODS One thousand fifty nine patients with newly diagnosed OSA, who were referred to the Sleep Disorders Center of Evangelismos Hospital of Athens over an 18-month period, were included in this study. A split-night polysomnography (PSG), or two formal overnight PSGs (diagnostic and continuous PAP (CPAP) titration study), were performed. RESULTS Patients with OSA were divided in two groups; the first group included 277 patients, who underwent two separate studies (diagnostic and CPAP titration study), and the second group 782 patients, who underwent split-night studies. The prevalence of TE-CSA in the first group was 2.53% (7 patients), and in the second group was 5.63% (44 patients). CONCLUSIONS The prevalence of TE-CSA in Greece was lower compared to most previous reported studies. The significant variation in the prevalence of TE-CSA between different centers throughout the world is mainly associated with the used diagnostic criteria as well as methodological and technical aspects.
Collapse
|
17
|
Gupta A, Shukla G. Polysomnographic determinants of requirement for advanced positive pressure therapeutic options for obstructive sleep apnea. Sleep Breath 2017; 22:401-409. [DOI: 10.1007/s11325-017-1556-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 08/03/2017] [Accepted: 08/10/2017] [Indexed: 11/30/2022]
|
18
|
Shokoueinejad M, Fernandez C, Carroll E, Wang F, Levin J, Rusk S, Glattard N, Mulchrone A, Zhang X, Xie A, Teodorescu M, Dempsey J, Webster J. Sleep apnea: a review of diagnostic sensors, algorithms, and therapies. Physiol Meas 2017; 38:R204-R252. [PMID: 28820743 DOI: 10.1088/1361-6579/aa6ec6] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
While public awareness of sleep related disorders is growing, sleep apnea syndrome (SAS) remains a public health and economic challenge. Over the last two decades, extensive controlled epidemiologic research has clarified the incidence, risk factors including the obesity epidemic, and global prevalence of obstructive sleep apnea (OSA), as well as establishing a growing body of literature linking OSA with cardiovascular morbidity, mortality, metabolic dysregulation, and neurocognitive impairment. The US Institute of Medicine Committee on Sleep Medicine estimates that 50-70 million US adults have sleep or wakefulness disorders. Furthermore, the American Academy of Sleep Medicine (AASM) estimates that more than 29 million US adults suffer from moderate to severe OSA, with an estimated 80% of those individuals living unaware and undiagnosed, contributing to more than $149.6 billion in healthcare and other costs in 2015. Although various devices have been used to measure physiological signals, detect apneic events, and help treat sleep apnea, significant opportunities remain to improve the quality, efficiency, and affordability of sleep apnea care. As our understanding of respiratory and neurophysiological signals and sleep apnea physiological mechanisms continues to grow, and our ability to detect and process biomedical signals improves, novel diagnostic and treatment modalities emerge. OBJECTIVE This article reviews the current engineering approaches for the detection and treatment of sleep apnea. APPROACH It discusses signal acquisition and processing, highlights the current nonsurgical and nonpharmacological treatments, and discusses potential new therapeutic approaches. MAIN RESULTS This work has led to an array of validated signal and sensor modalities for acquiring, storing and viewing sleep data; a broad class of computational and signal processing approaches to detect and classify SAS disease patterns; and a set of distinctive therapeutic technologies whose use cases span the continuum of disease severity. SIGNIFICANCE This review provides a current perspective of the classes of tools at hand, along with a sense of their relative strengths and areas for further improvement.
Collapse
Affiliation(s)
- Mehdi Shokoueinejad
- Department of Biomedical Engineering, University of Wisconsin-Madison, 1550 Engineering Drive, Madison, WI 53706-1609, United States of America. Department of Population Health Sciences, University of Wisconsin-Madison, 610 Walnut St 707, Madison, WI 53726, United States of America. EnsoData Research, EnsoData Inc., 111 N Fairchild St, Suite 240, Madison, WI 53703, United States of America
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Pietrock C, von Haehling S. Sleep-disordered breathing in heart failure: facts and numbers. ESC Heart Fail 2017; 4:198-202. [PMID: 28772039 PMCID: PMC5542721 DOI: 10.1002/ehf2.12193] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 06/15/2017] [Indexed: 12/12/2022] Open
Abstract
Sleep‐disordered breathing has a high prevalence in the general population, but is especially prominent in patients with heart failure (HF). HF and sleep‐disordered breathing share a bidirectional relationship, with sleep‐disordered breathing being both cause and effect of poor cardiac functioning. The high inter‐individual variability of symptom presentation can impede the clinical diagnostic process. Polysomnography is the gold‐standard method of diagnosing sleep‐disordered breathing. Therapy of sleep‐disordered breathing should always consist of optimizing the treatment of the underlying disorder of HF. Additional therapeutic measures include continuous positive airway pressure ventilation therapy. New therapeutic options using neurostimulation are yielding promising results; however, long‐term benefits still need to be confirmed.
Collapse
Affiliation(s)
- Charlotte Pietrock
- Division of Cardiology and Metabolism: Heart Failure, Cachexia and Sarcopenia, Department of Internal Medicine and Cardiology, Charité Medical School, Berlin, Germany
| | - Stephan von Haehling
- Department of Cardiology and Pneumology, University Medical Centre Göttingen, Göttingen, Germany
| |
Collapse
|
20
|
Ohshima Y, Nakayama H, Matsuyama N, Hokari S, Sakagami T, Sato T, Koya T, Takahashi T, Kikuchi T, Nishizawa M, Shimohata T. Natural course and potential prognostic factors for sleep-disordered breathing in multiple system atrophy. Sleep Med 2017; 34:13-17. [DOI: 10.1016/j.sleep.2017.01.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 01/11/2017] [Accepted: 01/11/2017] [Indexed: 12/22/2022]
|
21
|
Thomas RJ, Shin C, Bianchi MT, Kushida C, Yun CH. Distinct polysomnographic and ECG-spectrographic phenotypes embedded within obstructive sleep apnea. SLEEP SCIENCE AND PRACTICE 2017. [DOI: 10.1186/s41606-017-0012-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
|
22
|
Abstract
Sleep apnea, which is the periodic cessation of breathing during sleep, is a major health problem affecting over 10 million people in the United States and is associated with several sequelae, including hypertension and stroke. Clinical studies suggest that abnormal carotid body (CB) activity may be a driver of sleep apnea. Because gaseous molecules are important determinants of CB activity, aberrations in their signaling could lead to sleep apnea. Here, we report that mice deficient in heme oxygenase-2 (HO-2), which generates the gaseous molecule carbon monoxide (CO), exhibit sleep apnea characterized by high apnea and hypopnea indices during rapid eye movement (REM) sleep. Similar high apnea and hypopnea indices were also noted in prehypertensive spontaneously hypertensive (SH) rats, which are known to exhibit CB hyperactivity. We identified the gaseous molecule hydrogen sulfide (H2S) as the major effector molecule driving apneas. Genetic ablation of the H2S-synthesizing enzyme cystathionine-γ-lyase (CSE) normalized breathing in HO-2-/- mice. Pharmacologic inhibition of CSE with l-propargyl glycine prevented apneas in both HO-2-/- mice and SH rats. These observations demonstrate that dysregulated CO and H2S signaling in the CB leads to apneas and suggest that CSE inhibition may be a useful therapeutic intervention for preventing CB-driven sleep apnea.
Collapse
|
23
|
Nigam G, Pathak C, Riaz M. A systematic review on prevalence and risk factors associated with treatment- emergent central sleep apnea. Ann Thorac Med 2016; 11:202-10. [PMID: 27512510 PMCID: PMC4966223 DOI: 10.4103/1817-1737.185761] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
INTRODUCTION: Treatment-emergent central sleep apnea (TECSA) is the appearance of central apneas and hypopneas after significant resolution of the obstructive events has been attained using positive airway pressure (PAP) therapy. The aim of the study was to determine the prevalence of TECSA and to understand what factors are associated with its development. METHODS: PubMed, MEDLINE, Scopus, Web of Science and Cochran Library databases were searched with Mesh headings to locate studies linking TECSA and obstructive sleep apnea (OSA). RESULTS: Nine studies were identified that reported the prevalence of TECSA ranging from 5.0% to 20.3%. Prevalence of TECSA for studies using only full night titration was between 5.0% and 12.1% where as it was between 6.5% and 20.3% for studies using split-night polysomnogram. The mean effective continuous PAP (CPAP) setting varied between 7.5 cm and 15.2 cm of water for patients in TECSA group and between 7.4 cm and 13.6 cm of water for the group without TECSA. CONCLUSIONS: The aggregate point prevalence of TECSA is about 8% with the estimated range varying from 5% to 20% in patients with untreated OSA. The prevalence tends to be higher for split-night studies compared to full night titration studies. TECSA can occur at any CPAP setting although extremely high CPAP settings could increase the likelihood. Male gender, higher baseline apnea-hypopnea index, and central apnea index at the time of diagnostic study could be associated with the development of TECSA at a subsequent titration study.
Collapse
Affiliation(s)
- Gaurav Nigam
- Department of Sleep Medicine, Clay County Hospital, Flora, IL, USA
| | - Charu Pathak
- Department of Obstetrics and Gynecology, NSCB Medical College, Jabalpur, Madhya Pradesh, India
| | - Muhammad Riaz
- Department of Hospital Medicine, Twin Cities Community Hospital, Templeton, CA, USA
| |
Collapse
|
24
|
Javaheri S, Winslow D, McCullough P, Wylie P, Kryger MH. The Use of a Fully Automated Automatic Adaptive Servoventilation Algorithm in the Acute and Long-term Treatment of Central Sleep Apnea. Chest 2015; 148:1454-1461. [DOI: 10.1378/chest.14-2966] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
|
25
|
Linz D, Woehrle H, Bitter T, Fox H, Cowie MR, Böhm M, Oldenburg O. The importance of sleep-disordered breathing in cardiovascular disease. Clin Res Cardiol 2015; 104:705-18. [DOI: 10.1007/s00392-015-0859-7] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 04/15/2015] [Indexed: 01/22/2023]
|
26
|
Li QY, Berry RB, Goetting MG, Staley B, Soto-Calderon H, Tsai SC, Jasko JG, Pack AI, Kuna ST. Detection of upper airway status and respiratory events by a current generation positive airway pressure device. Sleep 2015; 38:597-605. [PMID: 25409101 DOI: 10.5665/sleep.4578] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 10/06/2014] [Indexed: 01/23/2023] Open
Abstract
STUDY OBJECTIVES To compare a positive airway pressure (PAP) device's detection of respiratory events and airway status during device-detected apneas with events scored on simultaneous polysomnography (PSG). DESIGN Prospective PSGs of patients with sleep apnea using a new-generation PAP device. SETTINGS Four clinical and academic sleep centers. PATIENTS Forty-five patients with obstructive sleep apnea (OSA) and complex sleep apnea (Comp SA) performed a PSG on PAP levels adjusted to induce respiratory events. INTERVENTIONS None. MEASUREMENTS AND RESULTS PAP device data identifying the type of respiratory event and whether the airway during a device-detected apnea was open or obstructed were compared to time-synced, manually scored respiratory events on simultaneous PSG recording. Intraclass correlation coefficients between device-detected and PSG scored events were 0.854 for apnea-hypopnea index (AHI), 0.783 for apnea index, 0.252 for hypopnea index, and 0.098 for respiratory event-related arousals index. At a device AHI (AHIFlow) of 10 events/h, area under the receiver operating characteristic curve was 0.98, with sensitivity 0.92 and specificity 0.84. AHIFlow tended to overestimate AHI on PSG at values less than 10 events/h. The device detected that the airway was obstructed in 87.4% of manually scored obstructive apneas. Of the device-detected apneas with clear airway, a minority (15.8%) were manually scored as obstructive apneas. CONCLUSIONS A device-detected apnea-hypopnea index (AHIFlow) < 10 events/h on a positive airway pressure device is strong evidence of good treatment efficacy. Device-detected airway status agrees closely with the presumed airway status during polysomnography scored events, but should not be equated with a specific type of respiratory event.
Collapse
Affiliation(s)
- Qing Yun Li
- Department of Respiratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Richard B Berry
- Department of Medicine, University of Florida, Gainesville, FL
| | | | - Bethany Staley
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Haideliza Soto-Calderon
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Sheila C Tsai
- Department of Medicine, National Jewish Health, Denver, CO
| | | | - Allan I Pack
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Samuel T Kuna
- Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA.,Department of Medicine, Philadelphia Veterans Affairs Medical Center, Philadelphia, PA
| |
Collapse
|
27
|
Shapiro CM, Chung SA, Wylie PE, Hossain NK, Holle RHO, Rosenberg RP, Muehlbach MJ, Doekel RC, Pegram GV, Jasko JG. Home-use servo-ventilation therapy in chronic pain patients with central sleep apnea: initial and 3-month follow-up. Sleep Breath 2015; 19:1285-92. [PMID: 25813356 PMCID: PMC4662950 DOI: 10.1007/s11325-015-1161-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 02/19/2015] [Accepted: 03/10/2015] [Indexed: 01/24/2023]
Abstract
PURPOSE Opioid treatment of non-malignant chronic pain can result in hypoxemia, hypercarbia, and central sleep apnea. The aim of this study was to determine the initial efficacy of auto servo-ventilation (ASV) and after 3 months of home use. METHODS This prospective multicenter interventional study recruited chronic pain patients prescribed ≥100 morphine equivalents for at least 4 months. PARTICIPANTS Following full-night polysomnography (PSG) to confirm the presence of sleep-disordered breathing, patients were randomized to three additional full-night-attended PSGs with continuous positive airway pressure (CPAP), ASV, and servo-ventilation with an initial mandatory pressure support of 6 cm H2O (ASV manual PSmin 6). Following the PSGs, patients were sent home with EncoreAnywhere and ASV with or without mandatory pressure support. RESULTS Based on the initial PSG studies, CPAP improved but did not normalize the apnea-hypopnea index (AHI), central apnea index (CAI), or hypopnea index (HI), as all remained elevated. Clinically significant reductions were noted after just one night of ASV and ASV manual (PSmin 6). After 3 months of ASV home use, the AHI, CAI, and obstructive apnea index (OAI) were significantly reduced when compared to baseline diagnostic levels and even when compared to respiratory disturbance indices with CPAP treatment. CONCLUSIONS Initial and home use of ASV for 3 months resulted in significantly lower AHI, CAI, and OAI. This reduction attests to the efficacy of ASV treatment in chronic pain patients on high doses of opioids.
Collapse
Affiliation(s)
- Colin M Shapiro
- Department of Psychiatry, Toronto Western Hospital, University Health Network, 399 Bathurst Street, 7 Main - 429, Toronto, Ontario, M5T 2S8, Canada.,Youthdale Treatment Centres, Toronto, Canada
| | - Sharon A Chung
- Department of Psychiatry, Toronto Western Hospital, University Health Network, 399 Bathurst Street, 7 Main - 429, Toronto, Ontario, M5T 2S8, Canada. .,Youthdale Treatment Centres, Toronto, Canada.
| | - Paul E Wylie
- Arkansas Center of Sleep Medicine, Little Rock, AR, USA
| | - Naheed K Hossain
- Department of Psychiatry, Toronto Western Hospital, University Health Network, 399 Bathurst Street, 7 Main - 429, Toronto, Ontario, M5T 2S8, Canada
| | | | | | | | | | | | | |
Collapse
|
28
|
Tellez HF, Pattyn N, Mairesse O, Dolenc-Groselj L, Eiken O, Mekjavic IB, Migeotte PF, Macdonald-Nethercott E, Meeusen R, Neyt X. eAMI: a qualitative quantification of periodic breathing based on amplitude of oscillations. Sleep 2015; 38:381-9. [PMID: 25581914 DOI: 10.5665/sleep.4494] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 09/26/2014] [Indexed: 12/16/2022] Open
Abstract
STUDY OBJECTIVES Periodic breathing is sleep disordered breathing characterized by instability in the respiratory pattern that exhibits an oscillatory behavior. Periodic breathing is associated with increased mortality, and it is observed in a variety of situations, such as acute hypoxia, chronic heart failure, and damage to respiratory centers. The standard quantification for the diagnosis of sleep related breathing disorders is the apnea-hypopnea index (AHI), which measures the proportion of apneic/ hypopneic events during polysomnography. Determining the AHI is labor-intensive and requires the simultaneous recording of airflow and oxygen saturation. In this paper, we propose an automated, simple, and novel methodology for the detection and qualification of periodic breathing: the estimated amplitude modulation index (eAMI). PATIENTS OR PARTICIPANTS Antarctic Cohort (3800 meters): 13 normal individuals. Sleep Clinic Cohort: 39 different patients suffering from diverse sleep-related pathologies. MEASUREMENTS AND RESULTS When tested in a population with high levels of periodic breathing (Antarctic Cohort), eAMI was closely correlated with AHI (r = 0.95, P < 0.001). When tested in the clinical setting, the proposed method was able to detect portions of the signal in which subclinical periodic breathing was validated by an expert (n = 93; accuracy = 0.85). Average eAMI was also correlated with the loop gain for the combined clinical and Antarctica cohorts (r = 0.58, P < 0.001). CONCLUSIONS In terms of quantification and temporal resolution, the eAMI is able to estimate the strength of periodic breathing and the underlying loop gain at any given time within a record. The impaired prognosis associated with periodic breathing makes its automated detection and early diagnosis of clinical relevance.
Collapse
Affiliation(s)
- Helio Fernandez Tellez
- Vrije Universiteit Brussel, Human Physiology & Sportsmedicine Department, Brussels, Belgium.,Royal Military Academy of Brussels, VIPER Research Unit, Brussels, Belgium
| | - Nathalie Pattyn
- Vrije Universiteit Brussel, Human Physiology & Sportsmedicine Department, Brussels, Belgium.,Royal Military Academy of Brussels, VIPER Research Unit, Brussels, Belgium.,Vrije Universiteit Brussels, Biological Psychology Department, Brussels, Belgium
| | - Olivier Mairesse
- Royal Military Academy of Brussels, VIPER Research Unit, Brussels, Belgium.,Vrije Universiteit Brussels, Biological Psychology Department, Brussels, Belgium.,Sleep Laboratory & Unit for Chronobiology - Brugmann University Hospital Free University of Brussels, Brussels, Belgium
| | - Leja Dolenc-Groselj
- Clinical Institute of Clinical Neurophysiology, University Clinical Centre, Ljubljana, Slovenia
| | - Ola Eiken
- Department of Environmental Physiology, Swedish Aerospace Physiology Centre, Royal Institute of Technology, Stockholm, Sweden
| | - Igor B Mekjavic
- Deptartment of Automation, Biocybernetics, and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia
| | - P F Migeotte
- Université Libre de Bruxelles, Erasmus Hospital, Brussels, Belgium
| | - Em Macdonald-Nethercott
- The Princess Alexandra Hospital NHS Trust, Harlow, UK.,Institut polaire français Paul-Emile Victor, France
| | - Romain Meeusen
- Vrije Universiteit Brussel, Human Physiology & Sportsmedicine Department, Brussels, Belgium
| | - Xavier Neyt
- Royal Military Academy of Brussels, VIPER Research Unit, Brussels, Belgium.,CISS Department, Royal Military Academy of Brussels, Brussels, Belgium
| |
Collapse
|
29
|
Chopra A, Das P, Ramar K, Staats B, St Louis EK. Complex sleep apnea associated with use of nasal expiratory positive airway (nEPAP) device. J Clin Sleep Med 2015; 10:577-9. [PMID: 24812544 DOI: 10.5664/jcsm.3716] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Complex sleep apnea syndrome (CompSAS) is characterized by predominant obstructive sleep disordered breathing with evolution of central disordered breathing following exposure to nasal continuous positive airway pressure (CPAP) therapy in obstructive sleep apnea (OSA) patients. We report a case of CompSAS associated with use of a nasal expiratory positive airway (nEPAP, Provent) device. We therefore recommend obtaining objective sleep data to confirm treatment effectiveness of the nEPAP device for OSA prior to long-term prescription. Further research is warranted to understand the underlying pathophysiological mechanisms and risk factors associated with CompSAS.
Collapse
Affiliation(s)
- Amit Chopra
- Center for Sleep Medicine, Mayo Clinic, Rochester, MN
| | - Piyush Das
- Department of Sleep Medicine, Cleveland Clinic, Cleveland, OH
| | - Kannan Ramar
- Center for Sleep Medicine, Mayo Clinic, Rochester, MN
| | - Bruce Staats
- Center for Sleep Medicine, Mayo Clinic, Rochester, MN
| | | |
Collapse
|
30
|
Javaheri S, Brown LK, Randerath WJ. Clinical Applications of Adaptive Servoventilation Devices. Chest 2014; 146:858-868. [DOI: 10.1378/chest.13-1778] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
|
31
|
Nicolini A, Banfi P, Grecchi B, Lax A, Walterspacher S, Barlascini C, Robert D. Non-invasive ventilation in the treatment of sleep-related breathing disorders: A review and update. REVISTA PORTUGUESA DE PNEUMOLOGIA 2014; 20:324-35. [PMID: 24954545 DOI: 10.1016/j.rppneu.2014.03.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 02/08/2014] [Accepted: 03/29/2014] [Indexed: 12/14/2022] Open
Abstract
Non-invasive mechanical ventilation (NIV) was originally used in patients with acute respiratory compromises or exacerbations of chronic respiratory diseases as an alternative to intubation. Over the last thirty years NIV has been used during the night in patients with stable chronic lung diseases such as obstructive sleep apnea, the overlap syndrome (COPD and obstructive sleep apnea), neuromuscular disorders, obesity-hypoventilation syndrome and in other conditions such as sleep disorders associated with congestive heart failure. In this review we discuss the different types of NIV, the specific conditions in which they can be used as well as the indications, recommendations, and evidence supporting the efficacy of NIV.
Collapse
Affiliation(s)
- A Nicolini
- Respiratory Diseases Unit, Hospital of Sestri Levante, Italy.
| | - P Banfi
- Neuromuscular Diseases Unit, Don Gnocchi Foundation, Milan, Italy
| | - B Grecchi
- Rehabilitation Department ASL 4 Chiavarese, Italy
| | - A Lax
- Neuromuscular Diseases Unit, Don Gnocchi Foundation, Milan, Italy
| | - S Walterspacher
- Department of Pulmonology, University Hospital, Freiburg, Germany
| | | | - D Robert
- Emeritus Professor of Medicine, Claude Bernard University Lyon, France
| |
Collapse
|
32
|
Morgenthaler TI, Kuzniar TJ, Wolfe LF, Willes L, McLain WC, Goldberg R. The complex sleep apnea resolution study: a prospective randomized controlled trial of continuous positive airway pressure versus adaptive servoventilation therapy. Sleep 2014; 37:927-34. [PMID: 24790271 DOI: 10.5665/sleep.3662] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
INTRODUCTION Prior studies show that adaptive servoventilation (ASV) is initially more effective than continuous positive airway pressure (CPAP) for patients with complex sleep apnea syndrome (CompSAS), but choosing therapies has been controversial because residual central breathing events may resolve over time in many patients receiving chronic CPAP therapy. We conducted a multicenter, randomized, prospective trial comparing clinical and polysomnographic outcomes over prolonged treatment of patients with CompSAS, with CPAP versus ASV. METHODS Qualifying participants meeting criteria for CompSAS were randomized to optimized CPAP or ASV treatment. Clinical and polysomnographic data were obtained at baseline and after 90 days of therapy. RESULTS We randomized 66 participants (33 to each treatment). At baseline, the diagnostic apnea-hypopnea index (AHI) was 37.7 ± 27.8 (central apnea index [CAI] = 3.2 ± 5.8) and best CPAP AHI was 37.0 ± 24.9 (CAI 29.7 ± 25.0). After second-night treatment titration, the AHI was 4.7 ± 8.1 (CAI = 1.1 ± 3.7) on ASV and 14.1 ± 20.7 (CAI = 8.8 ± 16.3) on CPAP (P ≤ 0.0003). At 90 days, the ASV versus CPAP AHI was 4.4 ± 9.6 versus 9.9 ± 11.1 (P = 0.0024) and CAI was 0.7 ± 3.4 versus 4.8 ± 6.4 (P < 0.0001), respectively. In the intention-to-treat analysis, success (AHI < 10) at 90 days of therapy was achieved in 89.7% versus 64.5% of participants treated with ASV and CPAP, respectively (P = 0.0214). Compliance and changes in Epworth Sleepiness Scale and Sleep Apnea Quality of Life Index were not significantly different between treatment groups. CONCLUSION Adaptive servoventilation (ASV) was more reliably effective than CPAP in relieving complex sleep apnea syndrome. While two thirds of participants experienced success with CPAP, approximately 90% experienced success with ASV. Because both methods produced similar symptomatic changes, it is unclear if this polysomnographic effectiveness may translate into other desired outcomes. CLINICAL TRIALS Clinicaltrials.Gov NCT00915499.
Collapse
Affiliation(s)
- Timothy I Morgenthaler
- Mayo Clinic Center for Sleep Medicine, Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN
| | | | - Lisa F Wolfe
- Northwestern University Feinberg School of Medicine, Chicago, IL
| | | | | | | |
Collapse
|
33
|
Mogri M, Nadler J, Khan T, Mador MJ. Complex sleep apnea in patients with obstructive sleep apnea on opioids for chronic pain. Sleep Biol Rhythms 2014. [DOI: 10.1111/sbr.12051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mohammed Mogri
- Division of Pulmonary, Critical Care and Sleep Medicine; State University of New York at Buffalo; Buffalo NY USA
| | - Jamie Nadler
- Division of Pulmonary, Critical Care and Sleep Medicine; State University of New York at Buffalo; Buffalo NY USA
| | - Talha Khan
- Division of Pulmonary, Critical Care and Sleep Medicine; State University of New York at Buffalo; Buffalo NY USA
| | - M. Jeffery Mador
- Western New York Veteran Affairs Healthcare System and Division of Pulmonary, Critical Care and Sleep Medicine; State University of New York at Buffalo; Buffalo NY USA
| |
Collapse
|
34
|
Complex sleep apnea syndrome. SLEEP DISORDERS 2014; 2014:798487. [PMID: 24693440 PMCID: PMC3945285 DOI: 10.1155/2014/798487] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 11/10/2013] [Accepted: 11/23/2013] [Indexed: 12/16/2022]
Abstract
Complex sleep apnea is the term used to describe a form of sleep disordered breathing in which repeated central apneas (>5/hour) persist or emerge when obstructive events are extinguished with positive airway pressure (PAP) and for which there is not a clear cause for the central apneas such as narcotics or systolic heart failure. The driving forces in the pathophysiology are felt to be ventilator instability associated oscillation in PaCO2 arterial partial pressure of Carbon Dioxide, continuous cositive airway pressure (CPAP) related increased CO2 carbon dioxide elimination, and activation of airway and pulmonary stretch receptors triggering these central apneas. The prevalence ranges from 0.56% to 18% with no clear predictive characteristics as compared to simple obstructive sleep apnea. Prognosis is similar to obstructive sleep apnea. The central apnea component in most patients on followup using CPAP therap, has resolved. For those with continued central apneas on simple CPAP therapy, other treatment options include bilevel PAP, adaptive servoventilation, permissive flow limitation and/or drugs.
Collapse
|
35
|
DelRosso LM, Harper MB, Hoque R. A Man in His 50s Develops 3-Min Central Apneas During a Titration Study. Chest 2014; 145:404-406. [DOI: 10.1378/chest.13-1020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
|
36
|
|
37
|
Abstract
OPINION STATEMENT Complex sleep apnea currently refers to the emergence and persistence of central apneas and hypopneas following the application of positive airway pressure therapy in patients with obstructive sleep apnea. However, this narrow definition is an "outcome" and does not capture the spectrum of pathological activation of the respiratory chemoreflex in sleep apnea. The International Classification of Sleep Disorders - 3rd edition recognizes the phenomenon of Treatment-Related Central Sleep Apnea, but the phenotype is usually evident prior to onset of therapy. The key polysomnographic characteristics of chemoreflex modulated and mediated sleep apnea are nonrapid eye movement (NREM) dominance of respiratory events, short (<30 seconds) or long (>60 seconds) cycle time with a self-similar metronomic timing, and spontaneous improvement during rapid eye movement (REM) sleep. Thus, the majority of chemoreflex effects go unrecognized due to the bias toward obstructive sleep apnea's current scoring criteria. Any treatment of apparently obstructive sleep apnea, including surgery and oral appliances, can expose chemoreflex-driven instabilities. As both sleep fragmentation and a narrow CO2 reserve or increased loop gain drive the disease, sedatives (to induce longer periods of stable NREM sleep and reduce the destabilizing effects of arousals in NREM sleep) and CO2-based stabilization approaches are logical. Adaptive ventilation reduces mean hyperventilation yet can induce ventilator-patient desynchrony, while enhanced expiratory rebreathing space (EERS, dead space during positive pressure therapy) and CO2 manipulation directly stabilize respiratory control by moving CO2 above the apnea threshold. Carbonic anhydrase inhibition can provide further adjunctive benefits. Novel pharmacological approaches may target mediators of carotid body hypoxic sensitization, such as the balance between gas neurotransmitters. In complex apnea patients, single mode therapy is unlikely to be successful, and the power of multi-modality therapy should be harnessed for optimal outcomes.
Collapse
|
38
|
Affiliation(s)
- Tomasz J Kuźniar
- Division of Pulmonary and Critical Care Medicine, NorthShore University HealthSystem, Evanston, IL
| |
Collapse
|
39
|
Montesi SB, Bakker JP, Macdonald M, Hueser L, Pittman S, White DP, Malhotra A. Air leak during CPAP titration as a risk factor for central apnea. J Clin Sleep Med 2013; 9:1187-91. [PMID: 24235901 DOI: 10.5664/jcsm.3166] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVES Emergence of central sleep apnea has been described in the setting of continuous positive airway pressure (CPAP) initiation. The underlying mechanism is unclear; however, we postulate that air leak washing out anatomical dead space is a contributing factor. DESIGN Data were obtained from 310 patients with obstructive sleep apnea (OSA) who underwent either split-night or full-night CPAP titration during January to July of 2009. The majority (n = 245) underwent titration with a nasal mask. Average total leak and maximum total leak were measured at therapeutic CPAP level. Unintentional leak was calculated by subtracting manufacturer-defined intentional leak from maximum leak. RESULTS SUBJECTS WERE DIVIDED INTO TWO GROUPS: central apnea index (CAI) during titration < 5/hour and ≥ 5/hour. The groups were similar in terms of gender, age, BMI, and AHI. The CAI < 5 group had a median average leak of 45.5 L/min (IQR 20.8 L/min) versus 51.0 L/min (IQR 21.0 L/min) with CAI ≥ 5 (p = 0.056). Maximum leak was 59.5 L/min (IQR 27.0 L/min) with CAI < 5 and 75.0 L/min (IQR 27.8 L/min) with CAI ≥ 5 (p = 0.003). In the subset of subjects titrated using a nasal mask, median average leak was 42.0 L/min (IQR 17.0) in the CAI < 5 group and 50.0 L/min (IQR 16.8) in the CAI ≥ 5 group (p = 0.001). In the CAI < 5 group, median maximum leak was 57.0 L/min (IQR 23.0) versus 74.5 L/min (IQR 24.3) in the CAI ≥ 5 group (p < 0.001). CONCLUSIONS Leak during CPAP titration is associated with the development of acute central apnea; these data may have mechanistic and therapeutic implications for complex apnea. COMMENTARY A commentary on this article appears in this issue on page 1193.
Collapse
Affiliation(s)
- Sydney B Montesi
- Sleep Disorders Research Program, Brigham and Women's Hospital and Harvard Medical School, Boston, MA ; Pulmonary and Critical Care Unit, Massachusetts General Hospital, Boston, MA
| | | | | | | | | | | | | |
Collapse
|
40
|
Dellweg D, Kerl J, Hoehn E, Wenzel M, Koehler D. Randomized controlled trial of noninvasive positive pressure ventilation (NPPV) versus servoventilation in patients with CPAP-induced central sleep apnea (complex sleep apnea). Sleep 2013; 36:1163-71. [PMID: 23904676 DOI: 10.5665/sleep.2878] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
STUDY OBJECTIVES To compare the treatment effect of noninvasive positive pressure ventilation (NPPV) and anticyclic servoventilation in patients with continuous positive airway pressure (CPAP)-induced central sleep apnea (complex sleep apnea). DESIGN Randomized controlled trial. SETTING Sleep center. PATIENTS Thirty patients who developed complex sleep apnea syndrome (CompSAS) during CPAP treatment. INTERVENTIONS NPPV or servoventilation. MEASUREMENTS AND RESULTS Patients were randomized to NPPV or servo-ventilation. Full polysomnography (PSG) was performed after 6 weeks. On CPAP prior to randomization, patients in the NPPV and servoventilator arm had comparable apnea-hypopnea indices (AHI, 28.6 ± 6.5 versus 27.7 ± 9.7 events/h (mean ± standard deviation [SD])), apnea indices (AI,19 ± 5.6 versus 21.1 ± 8.6 events/h), central apnea indices (CAI, 16.7 ± 5.4 versus 18.2 ± 7.1 events/h), oxygen desaturation indices (ODI,17.5 ± 13.1 versus 24.3 ± 11.9 events/h). During initial titration NPPV and servoventilation significantly improved the AHI (9.1 ± 4.3 versus 9 ± 6.4 events/h), AI (2 ± 3.1 versus 3.5 ± 4.5 events/h) CAI (2 ± 3.1 versus 2.5 ± 3.9 events/h) and ODI (10.1 ± 4.5 versus 8.9 ± 8.4 events/h) when compared to CPAP treatment (all P < 0.05). After 6 weeks we observed the following differences: AHI (16.5 ± 8 versus 7.4 ± 4.2 events/h, P = 0.027), AI (10.4 ± 5.9 versus 1.7 ± 1.9 events/h, P = 0.001), CAI (10.2 ± 5.1 versus 1.5 ± 1.7 events/h, P < 0.0001)) and ODI (21.1 ± 9.2 versus 4.8 ± 3.4 events/h, P < 0.0001) for NPPV and servoventilation, respectively. Other sleep parameters were unaffected by any form of treatment. CONCLUSIONS After 6 weeks, servoventilation treated respiratory events more effectively than NPPV in patients with complex sleep apnea syndrome.
Collapse
Affiliation(s)
- Dominic Dellweg
- Kloster Grafschaft, Pulmonary Medicine I, Home Mechanical Ventilation Unit and Sleep Laboratory, Schmallenberg, Germany.
| | | | | | | | | |
Collapse
|
41
|
Abstract
Complex sleep apnea syndrome (CompSAS) describes the coexistence or appearance and persistence of central apneas or hypopneas in patients with obstructive sleep apnea upon successful restoration of airway patency. We review data on treatment of CompSAS with CPAP, bilevel positive airway pressure, and adaptive servoventilation and discuss evidence for the addition of medications (analgesics, hypnotics, acetazolamide) and gases (oxygen, CO2) to positive airway pressure therapy. Future research should focus on defining outcomes in patients with CompSAS and allow for more accurate tailoring of therapy to the pathophysiology present in the individual patient.
Collapse
Affiliation(s)
- Tomasz J Kuźniar
- Department of Internal Medicine, 4th Clinical Military Hospital, Wrocław, Poland
| | | |
Collapse
|
42
|
Kuźniar TJ, Kasibowska-Kuźniar K, Ray DW, Freedom T. Clinical heterogeneity of patients with complex sleep apnea syndrome. Sleep Breath 2013; 17:1209-14. [PMID: 23436008 PMCID: PMC3898341 DOI: 10.1007/s11325-013-0825-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/31/2013] [Accepted: 02/11/2013] [Indexed: 12/31/2022]
Abstract
Background The definition of complex sleep apnea (CompSAS) encompasses patients with obstructive sleep apnea (OSA) who develop central apnea activity upon restitution of airway patency. Presence of arterial hypertension (HTN), coronary artery disease (CAD) and heart failure (HF) have been proposed as risk factors for CompSAS among OSA patients. Using our database of patients with CompSAS, we examined the prevalence of these risk factors and defined other clinical characteristics of patients with CompSAS. Methods Through retrospective search of the database, we examined the medical and clinical characteristics of consecutive patients diagnosed with CompSAS between 11/1/2006 and 6/30/2011 at NorthShore University HealthSystem. Results One hundred and fifty patients with CompSAS were identified. Among patients included in the study, 97 (64.7 %) had at least one risk factor for CompSAS, while 53 (35.3 %) did not have any of them. Prevalence of low left ventricular ejection fraction and hypocapnia were low. Therapeutic interventions consisted of several positive airway pressure therapies, mainly adaptive servo ventilation. A hundred and ten patients (73.3 %) complied with recommended therapy and improved clinically. Conclusions Although most patients with CompSAS have cardiac comorbidities, about one third of patients do not have any risk factors of CompSAS prior to sleep testing. Further research on factors involved in development of CompSAS will allow for better tailoring of therapy to pathophysiology involved in an individual case.
Collapse
Affiliation(s)
- Tomasz J Kuźniar
- Division of Pulmonary and Critical Care Medicine, NorthShore University HealthSystem, 2650 Ridge Avenue, Evanston, IL, USA,
| | | | | | | |
Collapse
|
43
|
Sacchetti ML, Di Mascio MT, Ottaviani S, Faedda TM, Fiorelli M, Toni D, Roukos R. May stroke cause a Complex Sleep Apnea-CompSA? Sleep Med 2013; 14:223-4. [DOI: 10.1016/j.sleep.2012.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 10/02/2012] [Indexed: 10/27/2022]
|
44
|
Fukuma N, Hayashi H, Sugaya J, Aida T, Kato M, Kato K, Kato Y, Takahashi H, Mizuno K. Sleep-disordered breathing with nighttime hypocapnia relates to daytime enhanced ventilatory response to exercise in patients with heart disease. J NIPPON MED SCH 2013; 79:409-15. [PMID: 23291838 DOI: 10.1272/jnms.79.409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Sleep-disordered breathing (SDB) induces nighttime disturbance of arterial gases, such as carbon dioxide. However, it is still unclear whether nighttime SDB-related gas abnormality is related to respiratory dysregulation in daytime. Therefore, we examined the relationship between the arterial partial pressure of carbon dioxide (PaCO(2)) at nighttime and the respiratory response to exercise in daytime. METHODS Eighteen men (age, mean ± SD; 55 ± 11 years) with heart disease underwent multichannel respiratory monitoring through the night with transdermal measurement of PaCO(2) (PtcCO(2)) reflecting PaCO(2) and a cardiopulmonary exercise test in daytime. The ventilatory equivalent (VE)/carbon dioxide production (VCO(2)) slope as an index of ventilatory response to exercise and peak oxygen consumption (VO(2)) were obtained with a cardiopulmonary exercise test. RESULTS Of the 18 patients, 10 patients had obstructive SDB, 5 had central SDB, and 3 patients did not have SDB. The mean apnea-hypopnea index was 21 ± 17. Minimum nighttime saturation of O(2) was positively correlated with peak VO(2), but not with VE/VCO(2). Nighttime PtcCO(2) was not correlated with peak VO(2) but was negatively correlated with the VE/VCO(2) slope of the daytime cardiopulmonary exercise test (r=-0.53). CONCLUSION Nighttime lowering of PaCO(2) in SDB is related to an abnormal ventilatory response to exercise testing in the daytime. This finding suggests that nighttime hyperventilation in SDB alters both nighttime and daytime pathophysiological conditions in patients with heart disease.
Collapse
Affiliation(s)
- Nagaharu Fukuma
- Division of Cardiology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Abstract
Complex sleep apnea syndrome (CompSAS) is a distinct form of sleep-disordered breathing characterized as central sleep apnea (CSA), and presents in obstructive sleep apnea (OSA) patients during initial treatment with a continuous positive airway pressure (CPAP) device. The mechanisms of why CompSAS occurs are not well understood, though we have a high loop gain theory that may help to explain it. It is still controversial regarding the prevalence and the clinical significance of CompSAS. Patients with CompSAS have clinical features similar to OSA, but they do exhibit breathing patterns like CSA. In most CompSAS cases, CSA events during initial CPAP titration are transient and they may disappear after continued CPAP use for 4~8 weeks or even longer. However, the poor initial experience of CompSAS patients with CPAP may not be avoided, and nonadherence with continued therapy may often result. Treatment options like adaptive servo-ventilation are available now that may rapidly resolve the disorder and relieve the symptoms of this disease with the potential of increasing early adherence to therapy. But these approaches are associated with more expensive and complicated devices. In this review, the definition, potential plausible mechanisms, clinical characteristics, and treatment approaches of CompSAS will be summarized.
Collapse
Affiliation(s)
- Juan Wang
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, People’s Republic of China
| | - Yan Wang
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, People’s Republic of China
| | - Jing Feng
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, People’s Republic of China
- Division of Pulmonary and Critical Care Medicine, Duke University Medical Center, Durham, NC, USA
- Correspondence: Jing Feng, Respiratory Department of Tianjin Medical University General Hospital, Tianjin 300052, People’s Republic of China Email ;
| | - Bao-yuan Chen
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, People’s Republic of China
| | - Jie Cao
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, People’s Republic of China
| |
Collapse
|
46
|
Hoffman M, Schulman DA. The appearance of central sleep apnea after treatment of obstructive sleep apnea. Chest 2012; 142:517-522. [PMID: 22871763 DOI: 10.1378/chest.11-2562] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Patients with a primary diagnosis of obstructive sleep apnea frequently demonstrate central sleep apnea that emerges during treatment with CPAP. Although a number of mechanisms for this finding have been hypothesized, the pathophysiology is not definitively known. Controversy exists as to whether the concomitant appearance of the two phenomena represents a distinct meaningful entity. Regardless, the coincidence of these diseases may have important clinical implications. Herein, we review the proposed mechanisms for obstructive sleep apnea complicated by central sleep apnea. Future research is needed to elucidate the relative importance and susceptibility to intervention of the various pathophysiologic mechanisms responsible for this phenomenon, and whether a treatment approach distinct from that of pure obstructive apnea is justified.
Collapse
|
47
|
Abstract
Patients with complex sleep apnea syndrome (CompSAS) present with features of obstructive sleep apnea syndrome but demonstrate not only instability of upper airway tone (leading to classic obstructive apneas and hypopneas) but also unstable, chemosensitive ventilatory control leading to repetitive central apneas or periodic breathing during sleep. The central apneas often become most apparent after application of continuous positive airway pressure (CPAP) to alleviate upper airway obstruction; patients continue to have fragmented sleep and repetitive desaturations as a result of central apneas and hypopneas. In some patients, central apneas appear to abate over time as a result of some form of adaptation to CPAP. How often this occurs is uncertain, however, and many patients with CompSAS require treatment that combines stabilization of the upper airway obstruction with treatment of respiratory center dysfunction. Adaptive servo-ventilation, which provides both a minimum pressure to hold the airway open and a precisely calculated ventilatory assist to minimize cyclic hypoventilation and hyperventilation, has emerged as a leading treatment. Noninvasive ventilation using bilevel positive airway pressure in the spontaneous-timed mode also may regulate ventilation in some patients with CompSAS. There is anecdotal evidence that CompSAS may be successfully treated using combined PAP therapy with oxygen, carbon dioxide, or the addition of dead space, but data are not sufficient to routinely recommend these methods.
Collapse
Affiliation(s)
- Tomasz J Kuźniar
- Timothy I. Morgenthaler, MD Center for Sleep Medicine, Mayo Clinic, 200 First Street, Rochester, MN 55905, USA.
| | | |
Collapse
|
48
|
Goldstein C, Kuzniar TJ. The emergence of central sleep apnea after surgical relief of nasal obstruction in obstructive sleep apnea. J Clin Sleep Med 2012; 8:321-2. [PMID: 22701391 DOI: 10.5664/jcsm.1926] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
By the current definition, complex sleep apnea (CompSA) refers to the emergence of central sleep apnea (CSA) during the treatment of obstructive sleep apnea (OSA) with continuous positive airway pressure (CPAP). However, new-onset CSA has been described with use of other treatments for OSA, including tracheostomy, maxillofacial surgery, and mandibular advancement device. We present a patient with CSA beginning after endoscopic sinus and nasal surgery for nasal obstruction in the setting of mild OSA. This case highlights the importance of non-PAP mechanisms in the pathogenesis of CompSA.
Collapse
Affiliation(s)
- Cathy Goldstein
- Sleep Disorders Center, NorthShore University Health System, Evanston, IL, USA.
| | | |
Collapse
|
49
|
Canadian Thoracic Society 2011 guideline update: diagnosis and treatment of sleep disordered breathing. Can Respir J 2012; 18:25-47. [PMID: 21369547 DOI: 10.1155/2011/506189] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The Canadian Thoracic Society (CTS) published an executive summary of guidelines for the diagnosis and treatment of sleep disordered breathing in 2006⁄2007. These guidelines were developed during several meetings by a group of experts with evidence grading based on committee consensus. These guidelines were well received and the majority of the recommendations remain unchanged. The CTS embarked on a more rigorous process for the 2011 guideline update, and addressed eight areas that were believed to be controversial or in which new data emerged. The CTS Sleep Disordered Breathing Committee posed specific questions for each area. The recommendations regarding maximum assessment wait times, portable monitoring, treatment of asymptomatic adult obstructive sleep apnea patients, treatment with conventional continuous positive airway pressure compared with automatic continuous positive airway pressure, and treatment of central sleep apnea syndrome in heart failure patients replace the recommendations in the 2006⁄2007 guidelines. The recommendations on bariatric surgery, complex sleep apnea and optimum positive airway pressure technologies are new topics, which were not covered in the 2006⁄2007 guidelines.
Collapse
|
50
|
Central apnea after adenotonsillectomy in childhood: case report. Sleep Breath 2012; 16:961-6. [DOI: 10.1007/s11325-011-0634-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Revised: 12/02/2011] [Accepted: 12/09/2011] [Indexed: 10/14/2022]
|