1
|
Wang X, Zhou T, Huang W, Zhang J, Zou J, Guan J, Yi H, Yin S. Differences in Physiologic Endotypes Between Nonpositional and Positional OSA: Results From the Shanghai Sleep Health Study Cohort. Chest 2024; 166:212-225. [PMID: 38218217 DOI: 10.1016/j.chest.2024.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 12/04/2023] [Accepted: 01/07/2024] [Indexed: 01/15/2024] Open
Abstract
BACKGROUND Positional OSA (POSA) is a recognized subtype of OSA that exhibits distinct endotypic characteristics when compared with nonpositional OSA (NPOSA). The basis for the disparity in endotypes between these subtypes remains poorly understood. RESEARCH QUESTION (1) Do individuals with NPOSA and POSA have different underlying OSA endotypes? (2) Which endotypic characteristics are critical in determining NPOSA and POSA severity? STUDY DESIGN AND METHODS Within the Shanghai Sleep Health Study cohort, individuals with OSA were recruited and classified as having POSA or NPOSA. Endotypes were calculated using polysomnography. RESULTS Endotype analysis was conducted in 1,036 individuals with OSA. Compared with individuals with NPOSA, those with POSA had lower loop gain calculated during all sleep stages and all sleep positions (0.55; interquartile range [IQR], 0.46-0.66 vs 0.68, IQR, 0.52-0.90; P < .001), lower arousal threshold calculated during all sleep stages and all sleep positions (ArTHAll) (138.67; IQR, 118.94-180.87 percentage of the eupneic ventilation [%Veupnea] vs 189.00; IQR, 129.71-257.76 %Veupnea; P < .001), lower pharyngeal collapsibility calculated during all sleep stages and all sleep positions (VpassiveAll) (91.85; IQR, 83.13-95.15 %Veupnea vs 76.38; IQR, 23.77-92.08 %Veupnea; P < .001), and higher muscle compensation calculated during all sleep stages and all sleep positions (6.50; IQR, -6.77 to 16.39 %Veupnea vs 3.65; IQR, -10.47 to 12.14 %Veupnea; P = .003). Logistic regression analyses indicated that higher VpassiveAll was associated with increased odds of POSA vs NPOSA. In NPOSA, fully adjusted linear regression analyses indicated that VpassiveAll (β = -0.55; 95% CI, -0.68 to -0.42; P < .001) and lower loop gain calculated during all sleep stages and all sleep positions (β = 0.19; 95% CI, 0.08-0.30; P < .001) were significant independent predictors of the apnea hypopnea index, with VpassiveAll being the most critical factor. In contrast, in POSA, collapsibility appeared to be less influential (β = -0.09; 95% CI, -0.21 to 0.03; P = .138). Nonanatomic endotypic characteristics (LGAll: β = 0.29; 95% CI, 0.18-0.41; P < .001; arousal threshold in all sleep stages and all sleep positions: β = 0.15; 95% CI, 0.01-0.28; P = .031; muscle compensation in all sleep stages and all sleep positions: β = -0.21; 95% CI, -0.29 to -0.12; P < .001) were significant in determining the severity of POSA, with loop gain being the most crucial factor. INTERPRETATION This study highlights the differences in endotypes between NPOSA and POSA. In Chinese individuals, anatomic factors were more significant in determining the severity of NPOSA, whereas nonanatomic traits were more likely to determine the severity of POSA. Future research should focus on developing personalized management strategies for individuals with NPOSA and POSA based on their endotypes. TRIAL REGISTRATION Chinese Clinical Trial Registry; No.: ChiCTR1900025714; URL: https://www.chictr.org.cn/indexEN.html.
Collapse
Affiliation(s)
- Xiaoting Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China; Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China
| | - Tianjiao Zhou
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China; Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China
| | - Weijun Huang
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China; Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.
| | - Jingyu Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China; Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China
| | - Jianyin Zou
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China; Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China
| | - Jian Guan
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China; Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China
| | - Hongliang Yi
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China; Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.
| | - Shankai Yin
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China; Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China
| |
Collapse
|
2
|
Mackay SG, Every JD. Advances in Pharyngeal Surgery Over the Past 10 Years: New Techniques and Technology. Otolaryngol Clin North Am 2024; 57:501-510. [PMID: 38521723 DOI: 10.1016/j.otc.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2024]
Abstract
This article is a review of advances in pharyngeal surgery over the past 10 years regarding literature, surgical technique, assessment, collaboration, and future direction in the management of adult and pediatric obstructive sleep apnea.
Collapse
Affiliation(s)
- Stuart G Mackay
- Department of Otolaryngology, Head and Neck Surgery, The Wollongong Hospital, Wollongong, New South Wales, Australia; School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia; Illawarra ENT Head and Neck Clinic, 8-10 Victoria Street, Wollongong, New South Wales 2500, Australia
| | - James D Every
- Department of Otolaryngology, Head and Neck Surgery, The Wollongong Hospital, Wollongong, New South Wales, Australia; School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia.
| |
Collapse
|
3
|
Osman AM, Toson B, Naik GR, Mukherjee S, Delbeck M, Hahn M, Muller T, Weimann G, Eckert DJ. A novel TASK channel antagonist nasal spray reduces sleep apnea severity in physiological responders: a randomized, blinded, trial. Am J Physiol Heart Circ Physiol 2024; 326:H715-H723. [PMID: 38214905 DOI: 10.1152/ajpheart.00541.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/25/2023] [Accepted: 12/28/2023] [Indexed: 01/13/2024]
Abstract
Preclinical and human physiological studies indicate that topical, selective TASK 1/3 K+ channel antagonism increases upper airway dilator muscle activity and reduces pharyngeal collapsibility during anesthesia and nasal breathing during sleep. The primary aim of this study was to determine the effects of BAY2586116 nasal spray on obstructive sleep apnea (OSA) severity and whether individual responses vary according to differences in physiological responses and route of breathing. Ten people (5 females) with OSA [apnea-hypopnea index (AHI) = 47 ± 26 events/h (means ± SD)] who completed previous sleep physiology studies with BAY2586116 were invited to return for three polysomnography studies to quantify OSA severity. In random order, participants received either placebo nasal spray (saline), BAY2586116 nasal spray (160 µg), or BAY2586116 nasal spray (160 µg) restricted to nasal breathing (chinstrap or mouth tape). Physiological responders were defined a priori as those who had improved upper airway collapsibility (critical closing pressure ≥2 cmH2O) with BAY2586116 nasal spray (NCT04236440). There was no systematic change in apnea-hypopnea index (AHI3) from placebo versus BAY2586116 with either unrestricted or nasal-only breathing versus placebo (47 ± 26 vs. 43 ± 27 vs. 53 ± 33 events/h, P = 0.15). However, BAY2586116 (unrestricted breathing) reduced OSA severity in physiological responders compared with placebo (e.g., AHI3 = 28 ± 11 vs. 36 ± 12 events/h, P = 0.03 and ODI3 = 18 ± 10 vs. 28 ± 12 events/h, P = 0.02). Morning blood pressure was also lower in physiological responders after BAY2586116 versus placebo (e.g., systolic blood pressure = 137 ± 24 vs. 147 ± 21 mmHg, P < 0.01). In conclusion, BAY2586116 reduces OSA severity during sleep in people who demonstrate physiological improvement in upper airway collapsibility. These findings highlight the therapeutic potential of this novel pharmacotherapy target in selected individuals.NEW & NOTEWORTHY Preclinical findings in pigs and humans indicate that blocking potassium channels in the upper airway with topical nasal application increases pharyngeal dilator muscle activity and reduces upper airway collapsibility. In this study, BAY2586116 nasal spray (potassium channel blocker) reduced sleep apnea severity in those who had physiological improvement in upper airway collapsibility. BAY2586116 lowered the next morning's blood pressure. These findings highlight the potential for this novel therapeutic approach to improve sleep apnea in certain people.
Collapse
Affiliation(s)
- Amal M Osman
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Barbara Toson
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Ganesh R Naik
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| | - Sutapa Mukherjee
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
- Respiratory and Sleep Service, Southern Adelaide Local Health Network, SA Health, Adelaide, South Australia, Australia
| | - Martina Delbeck
- Research & Development, Bayer AG, Pharmaceuticals, Wuppertal, Germany
| | - Michael Hahn
- Research & Development, Bayer AG, Pharmaceuticals, Wuppertal, Germany
| | - Thomas Muller
- Research & Development, Bayer AG, Pharmaceuticals, Wuppertal, Germany
| | - Gerrit Weimann
- Research & Development, Bayer AG, Pharmaceuticals, Wuppertal, Germany
| | - Danny J Eckert
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, South Australia, Australia
| |
Collapse
|
4
|
Edwards BA, O'Driscoll DM, Brooker EJ, Landry SA. A deep dive into the physiological differences responsible for obstructive sleep apnea between races. Sleep 2023; 46:zsad186. [PMID: 37429581 DOI: 10.1093/sleep/zsad186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Indexed: 07/12/2023] Open
Affiliation(s)
- Bradley A Edwards
- Turner Institute for Brain and Mental Health, School of Psychological Sciences, Monash University, Clayton, VIC, Australia
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Denise M O'Driscoll
- Department of Respiratory and Sleep Medicine, Eastern Health, Melbourne, VIC, Australia
- Eastern Health Clinical School, Monash University, Melbourne, VIC, Australia
| | - Elliot J Brooker
- Turner Institute for Brain and Mental Health, School of Psychological Sciences, Monash University, Clayton, VIC, Australia
| | - Shane A Landry
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| |
Collapse
|
5
|
Puri S, Panza GS, Kissane D, Jones S, Reck K, Lin HS, Badr MS, Mateika JH. Racial differences in upper airway collapsibility and loop gain in young adult males. Sleep 2023; 46:zsad091. [PMID: 36999953 PMCID: PMC10710980 DOI: 10.1093/sleep/zsad091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/16/2023] [Indexed: 04/01/2023] Open
Abstract
STUDY OBJECTIVES Previous studies reported that the apnea-hypopnea index was similar in young adult Black and White participants. However, whether this similarity reflects an analogous combination of apneas and hypopneas is unknown. Likewise, the physiological mechanisms underlying this similarity has not been explored. METHODS 60 Black and 48 White males completed the study. After matching for age and body mass index, 41 participants remained in each group. All participants completed a sleep study. Subsequently, standard sleep indices along with loop gain and the arousal threshold were determined. In addition, airway collapsibility (24 of 60 and 14 of 48 participants) and the hypoxic ventilatory response during wakefulness (30 of 60 and 25 of 48 participants) was measured. RESULTS The apnea-hypopnea index was similar in Blacks and Whites (p = .140). However, the index was comprised of more apneas (p = .014) and fewer hypopneas (p = .025) in Black males. These modifications were coupled to a reduced loop gain (p = .0002) and a more collapsible airway (p = .030). These differences were independent of whether or not the groups were matched. For a given hypoxic response, loop gain was reduced in Black compared to White males (p = .023). CONCLUSIONS Despite a similar apnea-hypopnea index, more apneas and fewer hypopneas were evident in young adult Black compared to White males. The physiological mechanisms that contribute to these events were also different between groups. Addressing these differences may be important when considering novel therapeutic approaches to eliminate apnea in Black and White participants.
Collapse
Affiliation(s)
- Shipra Puri
- Research and Development, John D. Dingell Veterans Affairs Medical Center, Detroit, MI 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Gino S Panza
- Research and Development, John D. Dingell Veterans Affairs Medical Center, Detroit, MI 48201, USA
- Department of Health Care Sciences, College of Pharmacy and Health Science, Detroit, MI 48201, USA
| | - Dylan Kissane
- Research and Development, John D. Dingell Veterans Affairs Medical Center, Detroit, MI 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Steven Jones
- Research and Development, John D. Dingell Veterans Affairs Medical Center, Detroit, MI 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Kevin Reck
- Research and Development, John D. Dingell Veterans Affairs Medical Center, Detroit, MI 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Ho-Sheng Lin
- Research and Development, John D. Dingell Veterans Affairs Medical Center, Detroit, MI 48201, USA
- Department of Otolaryngology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - M Safwan Badr
- Research and Development, John D. Dingell Veterans Affairs Medical Center, Detroit, MI 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Department of Internal Medicine, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Jason H Mateika
- Research and Development, John D. Dingell Veterans Affairs Medical Center, Detroit, MI 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Department of Internal Medicine, Wayne State University School of Medicine, Detroit, MI 48201, USA
| |
Collapse
|
6
|
Chang JL, Goldberg AN, Alt JA, Alzoubaidi M, Ashbrook L, Auckley D, Ayappa I, Bakhtiar H, Barrera JE, Bartley BL, Billings ME, Boon MS, Bosschieter P, Braverman I, Brodie K, Cabrera-Muffly C, Caesar R, Cahali MB, Cai Y, Cao M, Capasso R, Caples SM, Chahine LM, Chang CP, Chang KW, Chaudhary N, Cheong CSJ, Chowdhuri S, Cistulli PA, Claman D, Collen J, Coughlin KC, Creamer J, Davis EM, Dupuy-McCauley KL, Durr ML, Dutt M, Ali ME, Elkassabany NM, Epstein LJ, Fiala JA, Freedman N, Gill K, Boyd Gillespie M, Golisch L, Gooneratne N, Gottlieb DJ, Green KK, Gulati A, Gurubhagavatula I, Hayward N, Hoff PT, Hoffmann OM, Holfinger SJ, Hsia J, Huntley C, Huoh KC, Huyett P, Inala S, Ishman SL, Jella TK, Jobanputra AM, Johnson AP, Junna MR, Kado JT, Kaffenberger TM, Kapur VK, Kezirian EJ, Khan M, Kirsch DB, Kominsky A, Kryger M, Krystal AD, Kushida CA, Kuzniar TJ, Lam DJ, Lettieri CJ, Lim DC, Lin HC, Liu SY, MacKay SG, Magalang UJ, Malhotra A, Mansukhani MP, Maurer JT, May AM, Mitchell RB, Mokhlesi B, Mullins AE, Nada EM, Naik S, Nokes B, Olson MD, Pack AI, Pang EB, Pang KP, Patil SP, Van de Perck E, Piccirillo JF, Pien GW, Piper AJ, Plawecki A, Quigg M, Ravesloot MJ, Redline S, Rotenberg BW, Ryden A, Sarmiento KF, Sbeih F, Schell AE, Schmickl CN, Schotland HM, Schwab RJ, Seo J, Shah N, Shelgikar AV, Shochat I, Soose RJ, Steele TO, Stephens E, Stepnowsky C, Strohl KP, Sutherland K, Suurna MV, Thaler E, Thapa S, Vanderveken OM, de Vries N, Weaver EM, Weir ID, Wolfe LF, Tucker Woodson B, Won CH, Xu J, Yalamanchi P, Yaremchuk K, Yeghiazarians Y, Yu JL, Zeidler M, Rosen IM. International Consensus Statement on Obstructive Sleep Apnea. Int Forum Allergy Rhinol 2023; 13:1061-1482. [PMID: 36068685 PMCID: PMC10359192 DOI: 10.1002/alr.23079] [Citation(s) in RCA: 62] [Impact Index Per Article: 62.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/12/2022] [Accepted: 08/18/2022] [Indexed: 11/08/2022]
Abstract
BACKGROUND Evaluation and interpretation of the literature on obstructive sleep apnea (OSA) allows for consolidation and determination of the key factors important for clinical management of the adult OSA patient. Toward this goal, an international collaborative of multidisciplinary experts in sleep apnea evaluation and treatment have produced the International Consensus statement on Obstructive Sleep Apnea (ICS:OSA). METHODS Using previously defined methodology, focal topics in OSA were assigned as literature review (LR), evidence-based review (EBR), or evidence-based review with recommendations (EBR-R) formats. Each topic incorporated the available and relevant evidence which was summarized and graded on study quality. Each topic and section underwent iterative review and the ICS:OSA was created and reviewed by all authors for consensus. RESULTS The ICS:OSA addresses OSA syndrome definitions, pathophysiology, epidemiology, risk factors for disease, screening methods, diagnostic testing types, multiple treatment modalities, and effects of OSA treatment on multiple OSA-associated comorbidities. Specific focus on outcomes with positive airway pressure (PAP) and surgical treatments were evaluated. CONCLUSION This review of the literature consolidates the available knowledge and identifies the limitations of the current evidence on OSA. This effort aims to create a resource for OSA evidence-based practice and identify future research needs. Knowledge gaps and research opportunities include improving the metrics of OSA disease, determining the optimal OSA screening paradigms, developing strategies for PAP adherence and longitudinal care, enhancing selection of PAP alternatives and surgery, understanding health risk outcomes, and translating evidence into individualized approaches to therapy.
Collapse
Affiliation(s)
- Jolie L. Chang
- University of California, San Francisco, California, USA
| | | | | | | | - Liza Ashbrook
- University of California, San Francisco, California, USA
| | | | - Indu Ayappa
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | | | | | | | - Maurits S. Boon
- Sidney Kimmel Medical Center at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Pien Bosschieter
- Academic Centre for Dentistry Amsterdam, Amsterdam, The Netherlands
| | - Itzhak Braverman
- Hillel Yaffe Medical Center, Hadera Technion, Faculty of Medicine, Hadera, Israel
| | - Kara Brodie
- University of California, San Francisco, California, USA
| | | | - Ray Caesar
- Stone Oak Orthodontics, San Antonio, Texas, USA
| | | | - Yi Cai
- University of California, San Francisco, California, USA
| | | | | | | | | | | | | | | | | | - Susmita Chowdhuri
- Wayne State University and John D. Dingell VA Medical Center, Detroit, Michigan, USA
| | - Peter A. Cistulli
- Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - David Claman
- University of California, San Francisco, California, USA
| | - Jacob Collen
- Uniformed Services University, Bethesda, Maryland, USA
| | | | | | - Eric M. Davis
- University of Virginia, Charlottesville, Virginia, USA
| | | | | | - Mohan Dutt
- University of Michigan, Ann Arbor, Michigan, USA
| | - Mazen El Ali
- University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | | | | | | | | | - Kirat Gill
- Stanford University, Palo Alto, California, USA
| | | | - Lea Golisch
- University Hospital Mannheim, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany
| | | | | | | | - Arushi Gulati
- University of California, San Francisco, California, USA
| | | | | | - Paul T. Hoff
- University of Michigan, Ann Arbor, Michigan, USA
| | - Oliver M.G. Hoffmann
- University Hospital Mannheim, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany
| | | | - Jennifer Hsia
- University of Minnesota, Minneapolis, Minnesota, USA
| | - Colin Huntley
- Sidney Kimmel Medical Center at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | | | | | - Sanjana Inala
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | | | | | | | | | | | | | | | | | - Meena Khan
- Ohio State University, Columbus, Ohio, USA
| | | | - Alan Kominsky
- Cleveland Clinic Head and Neck Institute, Cleveland, Ohio, USA
| | - Meir Kryger
- Yale School of Medicine, New Haven, Connecticut, USA
| | | | | | | | - Derek J. Lam
- Oregon Health and Science University, Portland, Oregon, USA
| | | | | | | | | | | | | | - Atul Malhotra
- University of California, San Diego, California, USA
| | | | - Joachim T. Maurer
- University Hospital Mannheim, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany
| | - Anna M. May
- Case Western Reserve University, Cleveland, Ohio, USA
| | - Ron B. Mitchell
- University of Texas, Southwestern and Children’s Medical Center Dallas, Texas, USA
| | | | | | | | | | - Brandon Nokes
- University of California, San Diego, California, USA
| | | | - Allan I. Pack
- University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | | | | | | | | | | | | | | | | | - Mark Quigg
- University of Virginia, Charlottesville, Virginia, USA
| | | | - Susan Redline
- Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Armand Ryden
- Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California, USA
| | | | - Firas Sbeih
- Cleveland Clinic Head and Neck Institute, Cleveland, Ohio, USA
| | | | | | | | | | - Jiyeon Seo
- University of California, Los Angeles, California, USA
| | - Neomi Shah
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | | | - Ryan J. Soose
- University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | | | - Erika Stephens
- University of California, San Francisco, California, USA
| | | | | | | | | | - Erica Thaler
- University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sritika Thapa
- Yale School of Medicine, New Haven, Connecticut, USA
| | | | - Nico de Vries
- Academic Centre for Dentistry Amsterdam, Amsterdam, The Netherlands
| | | | - Ian D. Weir
- Yale School of Medicine, New Haven, Connecticut, USA
| | | | | | | | - Josie Xu
- University of Toronto, Ontario, Canada
| | | | | | | | | | | | - Ilene M. Rosen
- University of Pennsylvania, Philadelphia, Pennsylvania, USA
| |
Collapse
|
7
|
Turnbull CD, Stradling JR. Endotyping, phenotyping and personalised therapy in obstructive sleep apnoea: are we there yet? Thorax 2023; 78:726-732. [PMID: 37217289 DOI: 10.1136/thorax-2023-220037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 05/02/2023] [Indexed: 05/24/2023]
Abstract
Obstructive sleep apnoea (OSA) was traditionally thought to be mainly caused by obesity and upper airway crowding, and hence OSA management was not personalised according to particular characteristics, with most symptomatic patients receiving continuous positive airway pressure therapy. Recent advances in our understanding have identified additional potential and distinct causes of OSA (endotypes), and subgroups of patients (phenotypes) with increased risk of cardiovascular complications. In this review, we discuss the evidence to date as to whether there are distinct clinically useful endotypes and phenotypes of OSA, and the challenges to the field in moving towards delivering personalised therapy in OSA.
Collapse
Affiliation(s)
- Chris D Turnbull
- Oxford Centre for Respiratory Medicine, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Oxford Centre for Respiratory Medicine, NIHR Oxford Biomedical Research Centre, Oxford, UK
- NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - John R Stradling
- NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| |
Collapse
|
8
|
Pack AI. Here come the pro/con debates. Sleep 2023; 46:zsad043. [PMID: 36852706 DOI: 10.1093/sleep/zsad043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Indexed: 03/01/2023] Open
Affiliation(s)
- Allan I Pack
- John Miclot Professor of Medicine, Division of Sleep Medicine/Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| |
Collapse
|
9
|
Sands SA, Edwards BA. Pro: can physiological risk factors for obstructive sleep apnea be determined by analysis of data obtained from routine polysomnography? Sleep 2023; 46:zsac310. [PMID: 36715219 PMCID: PMC10171624 DOI: 10.1093/sleep/zsac310] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Indexed: 01/31/2023] Open
Affiliation(s)
- Scott A Sands
- Division of Sleep Medicine, Brigham and Women’s Hospital and Harvard Medical School, 221 Longwood Avenue, Boston, MA 02115, USA
| | - Bradley A Edwards
- Department of Physiology, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, VIC, Australia
- Turner Institute for Brain and Mental Health, Monash University, Melbourne, VIC, Australia
| |
Collapse
|
10
|
Sands SA, Alex RM, Mann D, Vena D, Terrill PI, Gell LK, Zinchuk A, Sofer T, Patel SR, Taranto-Montemurro L, Azarbarzin A, Rueschman M, White DP, Wellman A, Redline S. Pathophysiology Underlying Demographic and Obesity Determinants of Sleep Apnea Severity. Ann Am Thorac Soc 2023; 20:440-449. [PMID: 36287615 PMCID: PMC9993145 DOI: 10.1513/annalsats.202203-271oc] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 10/14/2022] [Indexed: 11/20/2022] Open
Abstract
Rationale: Sleep apnea is the manifestation of key endotypic traits, including greater pharyngeal collapsibility, reduced dilator muscle compensation, and elevated chemoreflex loop gain. Objectives: We investigated how endotypic traits vary with obesity, age, sex, and race/ethnicity to influence sleep apnea disease severity (apnea-hypopnea index [AHI]). Methods: Endotypic traits were estimated from polysomnography in a diverse community-based cohort study (Multi-Ethnic Study of Atherosclerosis, N = 1,971; age range, 54-93 yr). Regression models assessed associations between each exposure (continuous variables per 2 standard deviations [SDs]) and endotypic traits (per SD) or AHI (events/h), independent of other exposures. Generalizability was assessed in two independent cohorts. Results: Greater AHI was associated with obesity (+19 events/h per 11 kg/m2 [2 SD]), male sex (+13 events/h vs. female), older age (+7 events/h per 20 yr), and Chinese ancestry (+5 events/h vs. White, obesity adjusted). Obesity-related increase in AHI was best explained by elevated collapsibility (+0.40 SD) and greater loop gain (+0.38 SD; percentage mediated, 26% [95% confidence interval (CI), 20-32%]). Male-related increase in AHI was explained by elevated collapsibility (+0.86 SD) and reduced compensation (-0.40 SD; percentage mediated, 57% [95% CI, 50-66%]). Age-related AHI increase was explained by elevated collapsibility (+0.37 SD) and greater loop gain (+0.15 SD; percentage mediated, 48% [95% CI, 34-63%]). Increased AHI with Chinese ancestry was explained by collapsibility (+0.57 SD; percentage mediated, 87% [95% CI, 57-100]). Black race was associated with reduced collapsibility (-0.30 SD) and elevated loop gain (+0.29 SD). Similar patterns were observed in the other cohorts. Conclusions: Different subgroups exhibit different underlying pathophysiological pathways to sleep apnea, highlighting the variability in mechanisms that could be targeted for intervention.
Collapse
Affiliation(s)
- Scott A. Sands
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Raichel M. Alex
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Dwayne Mann
- Institute for Social Science Research and
- School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Queensland, Australia
| | - Daniel Vena
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Philip I. Terrill
- School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Queensland, Australia
| | - Laura K. Gell
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Andrey Zinchuk
- Department of Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Tamar Sofer
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Sanjay R. Patel
- Department of Medicine, Center for Sleep and Cardiovascular Outcomes Research, and
- Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Luigi Taranto-Montemurro
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Ali Azarbarzin
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Michael Rueschman
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - David P. White
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Andrew Wellman
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| | - Susan Redline
- Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
| |
Collapse
|
11
|
Personalized Medicine and Obstructive Sleep Apnea. J Pers Med 2022; 12:jpm12122034. [PMID: 36556255 PMCID: PMC9781564 DOI: 10.3390/jpm12122034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/27/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
Obstructive sleep apnea (OSA) is a common disease that is often under-diagnosed and under-treated in all ages. This is due to differences in morphology, diversity in clinical phenotypes, and differences in diagnosis and treatment of OSA in children and adults, even among individuals of the same age. Therefore, a personalized medicine approach to diagnosis and treatment of OSA is necessary for physicians in clinical practice. In children and adults without serious underlying medical conditions, polysomnography at sleep labs may be an inappropriate and inconvenient testing modality compared to home sleep apnea testing. In addition, the apnea-hypopnea index should not be considered as a single parameter for making treatment decisions. Thus, the treatment of OSA should be personalized and based on individual tolerance to sleep-quality-related parameters measured by the microarousal index, harmful effects of OSA on the cardiovascular system related to severe hypoxia, and patients' comorbidities. The current treatment options for OSA include lifestyle modification, continuous positive airway pressure (CPAP) therapy, oral appliance, surgery, and other alternative treatments. CPAP therapy has been recommended as a cornerstone treatment for moderate-to-severe OSA in adults. However, not all patients can afford or tolerate CPAP therapy. This narrative review seeks to describe the current concepts and relevant approaches towards personalized management of patients with OSA, according to pathophysiology, cluster analysis of clinical characteristics, adequate combined therapy, and the consideration of patients' expectations.
Collapse
|
12
|
Osman AM, Mukherjee S, Altree TJ, Delbeck M, Gehring D, Hahn M, Lang T, Xing C, Muller T, Weimann G, Eckert DJ. Topical Potassium Channel Blockage Improves Pharyngeal Collapsibility: A Translational, Placebo-Controlled Trial. Chest 2022; 163:953-965. [PMID: 36435266 DOI: 10.1016/j.chest.2022.11.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 10/06/2022] [Accepted: 11/02/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Potassium channel inhibition has been identified in animal models as a potential target to increase pharyngeal dilator muscle activity and to treat OSA. However, these findings have not yet been translated to humans. RESEARCH QUESTION Does a novel, potent, TWIK-related acid-sensitive K+ (TASK) 1/3 channel antagonist, BAY2586116, improve pharyngeal collapsibility in pigs and humans, and secondarily, what is the optimal dose and method of topical application? STUDY DESIGN AND METHODS In the preclinical study, pharyngeal muscle activity and upper-airway collapsibility via transient negative pressure application was quantified in 13 anesthetized pigs during administration of placebo, 0.3 μg, 3 μg, and 30 μg nasal drops of BAY2586116. In the clinical study, 12 people with OSA instrumented with polysomnography equipment, an epiglottic pressure catheter, pneumotachograph, and nasal mask to monitor sleep and breathing performed up to four detailed upper airway sleep physiology studies. Participants received BAY2586116 or placebo nasal spray (160 μg) before sleep via a double-masked, randomized, crossover design. Most participants also returned for three additional overnight visits: (1) nasal drops (160 μg), (2) half-dose nasal spray (80 μg), and (3) direct endoscopic application (160 μg). The upper-airway critical closing pressure during sleep was quantified at each visit. RESULTS Consistent and sustained improvements in pharyngeal collapsibility to negative pressure were found with 3 and 30 μg of BAY2586116 vs placebo in pigs. Similarly, BAY2586116 improved pharyngeal collapsibility by an average of approximately 2 cm H2O vs placebo, regardless of topical application method and dose (P < .008, mixed model) in participants with OSA. INTERPRETATION Acute topical application of BAY2586116 improves upper-airway collapsibility in anesthetized pigs and sleeping humans with OSA. These novel physiologic findings highlight the therapeutic potential to target POTASSIUM channel mechanisms to treat OSA. TRIAL REGISTRY ClinicalTrials.gov; No.: NCT04236440; URL: www. CLINICALTRIALS gov.
Collapse
Affiliation(s)
- Amal M Osman
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide.
| | - Sutapa Mukherjee
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide; Respiratory and Sleep Service, Southern Adelaide Local Health Network, SA Health, SA, Australia
| | - Thomas J Altree
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide; Respiratory and Sleep Service, Southern Adelaide Local Health Network, SA Health, SA, Australia
| | - Martina Delbeck
- Research & Development, Pharmaceuticals, Bayer AG, Wuppertal
| | | | - Michael Hahn
- Research & Development, Pharmaceuticals, Bayer AG, Wuppertal
| | - Tina Lang
- Research & Development, Pharmaceuticals, Bayer AG, Wuppertal
| | - Charles Xing
- Research & Development, Pharmaceuticals, Bayer AG, Wuppertal
| | - Thomas Muller
- Research & Development, Pharmaceuticals, Bayer AG, Wuppertal
| | - Gerrit Weimann
- Research & Development, Pharmaceuticals, Bayer AG, Wuppertal
| | - Danny J Eckert
- Adelaide Institute for Sleep Health and FHMRI Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide
| |
Collapse
|
13
|
The Effects of Barbed Repositioning Pharyngoplasty in Positional and Non-Positional OSA Patients: A Retrospective Analysis. J Clin Med 2022; 11:jcm11226749. [PMID: 36431226 PMCID: PMC9697864 DOI: 10.3390/jcm11226749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 11/05/2022] [Accepted: 11/11/2022] [Indexed: 11/17/2022] Open
Abstract
PURPOSE The aim of our retrospective study is evaluating the effectiveness of barbed repositioning pharyngoplasty (BRP) in a consecutive cohort of patients and assessing its impact on positional indexes in order to potentially identify specific obstructive sleep apnea (OSA) phenotypes for patients who might benefit more significantly from this intervention. METHODS A single-center retrospective study with baseline and follow-up type III sleep tests evaluating the Apnea Hypopnea Index (AHI), supine AHI, non-supine AHI, oxygen desaturation index (ODI), mean SaO2, percentage of time spent at SaO2 below 90% (CT90), and lowest oxygen saturation (LOS) were performed. The patients were then divided into groups according to Sher's criteria and Amsterdam Positional OSA Classification (APOC). Parametric and non-parametric tests and univariate and multivariate analyses were conducted. RESULTS The study finally included 47 patients. The statistical analysis showed significant improvement in AHI, supine AHI, non-supine AHI, and ODI after surgery. The linear regression showed that high values of baseline AHI, AHI supine, and AHI non supine predict more significant postoperative reductions in AHI, AHI supine, and AHI non supine, respectively. Therapeutic success was achieved in 22 patients out of 47. The logistic regression did not find any independent risk factors for success. The most significant reduction in AHI, supine AHI, and non-supine AHI was observed in the APOC 3 group while the APOC 1 patients experience a substantially lower improvement. CONCLUSIONS BRP appears to be an effective surgical procedure for the treatment of OSA. The non-positional patients might benefit more from BRP in comparison with positional patients. Moreover, OSA severity should not be considered an absolute contra-indication for this surgical procedure.
Collapse
|
14
|
Wong AM, Landry SA, Joosten SA, Thomson LDJ, Turton A, Stonehouse J, Mansfield DR, Burgess G, Hays A, Sands SA, Andara C, Beatty CJ, Hamilton GS, Edwards BA. Examining the impact of multilevel upper airway surgery on the obstructive sleep apnoea endotypes and their utility in predicting surgical outcomes. Respirology 2022; 27:890-899. [PMID: 35598093 PMCID: PMC9542009 DOI: 10.1111/resp.14280] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 04/21/2022] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND OBJECTIVE Upper airway surgery for obstructive sleep apnoea (OSA) is an alternative treatment for patients who are intolerant of continuous positive airway pressure (CPAP). However, upper airway surgery has variable treatment efficacy with no reliable predictors of response. While we now know that there are several endotypes contributing to OSA (i.e., upper airway collapsibility, airway muscle response/compensation, respiratory arousal threshold and loop gain), no study to date has examined: (i) how upper airway surgery affects all four OSA endotypes, (ii) whether knowledge of baseline OSA endotypes predicts response to surgery and (iii) whether there are any differences when OSA endotypes are measured using the CPAP dial-down or clinical polysomnographic (PSG) methods. METHODS We prospectively studied 23 OSA patients before and ≥3 months after multilevel upper airway surgery. Participants underwent clinical and research PSG to measure OSA severity (apnoea-hypopnoea index [AHI]) and endotypes (measured in supine non-rapid eye movement [NREM]). Values are presented as mean ± SD or median (interquartile range). RESULTS Surgery reduced the AHITotal (38.7 [23.4 to 79.2] vs. 22.0 [13.3 to 53.5] events/h; p = 0.009). There were no significant changes in OSA endotypes, however, large but variable improvements in collapsibility were observed (CPAP dial-down method: ∆1.9 ± 4.9 L/min, p = 0.09, n = 21; PSG method: ∆3.4 [-2.8 to 49.0]%Veupnoea , p = 0.06, n = 20). Improvement in collapsibility strongly correlated with improvement in AHI (%∆AHISupineNREM vs. ∆collapsibility: p < 0.005; R2 = 0.46-0.48). None of the baseline OSA endotypes predicted response to surgery. CONCLUSION Surgery unpredictably alters upper airway collapsibility but does not alter the non-anatomical endotypes. There are no baseline predictors of response to surgery.
Collapse
Affiliation(s)
- Ai-Ming Wong
- Monash Lung, Sleep, Allergy & Immunology, Monash Health, Monash Medical Centre, Melbourne, Victoria, Australia.,School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Shane A Landry
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Victoria.,School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria
| | - Simon A Joosten
- Monash Lung, Sleep, Allergy & Immunology, Monash Health, Monash Medical Centre, Melbourne, Victoria, Australia.,School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Luke D J Thomson
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Victoria.,School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria
| | - Anthony Turton
- Monash Lung, Sleep, Allergy & Immunology, Monash Health, Monash Medical Centre, Melbourne, Victoria, Australia
| | - Jeremy Stonehouse
- Monash Lung, Sleep, Allergy & Immunology, Monash Health, Monash Medical Centre, Melbourne, Victoria, Australia
| | - Darren R Mansfield
- Monash Lung, Sleep, Allergy & Immunology, Monash Health, Monash Medical Centre, Melbourne, Victoria, Australia.,School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria
| | - Glen Burgess
- Department of Ear, Nose and Throat, Monash Health, Melbourne, Australia.,Department of Surgery, School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Andrew Hays
- Department of Ear, Nose and Throat, Monash Health, Melbourne, Australia
| | - Scott A Sands
- Division of Sleep and Circadian Disorders, Department of Medicine and Neurology, Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA.,Department of Allergy, Immunology and Respiratory Medicine and Central Clinical School, The Alfred and Monash University, Melbourne, Victoria, Australia
| | - Christopher Andara
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Victoria
| | - Caroline J Beatty
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Victoria.,School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria
| | - Garun S Hamilton
- Monash Lung, Sleep, Allergy & Immunology, Monash Health, Monash Medical Centre, Melbourne, Victoria, Australia.,School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Bradley A Edwards
- Department of Physiology, Biomedicine Discovery Institute, Monash University, Melbourne, Victoria.,School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria
| |
Collapse
|
15
|
Alex RM, Sofer T, Azarbarzin A, Vena D, Gell LK, Wellman A, White DP, Redline S, Sands SA. Within-night Repeatability and Long-term Consistency of Sleep Apnea Endotypes: The Multi-Ethnic Study of Atherosclerosis and Osteoporotic Fractures in Men Study. Sleep 2022; 45:6606022. [PMID: 35690023 DOI: 10.1093/sleep/zsac129] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 05/20/2022] [Indexed: 01/30/2023] Open
Abstract
STUDY OBJECTIVES Obstructive sleep apnea (OSA) is characterized by multiple "endotypic traits", including pharyngeal collapsibility, muscle compensation, loop gain, and arousal threshold. Here we examined 1) within-night repeatability, 2) long-term consistency, and 3) influences of body position and sleep state, of endotypic traits estimated from in-home polysomnography in mild-to-severe OSA (apnea-hypopnea index, AHI>5 events/hr). METHODS Within-night repeatability was assessed using Multi-Ethnic Study of Atherosclerosis (MESA): Traits derived separately from "odd" and "even" 30-min periods were correlated and regression (error vs. N windows available) provided a recommended amount of data for acceptable repeatability (R-threshold=0.7). Long-term consistency was assessed using the Osteoporotic Fractures in Men Study (MrOS) at two time points 6.5±0.7 years apart, before and after accounting for across-year body position and sleep state differences. Within-night dependence of traits on position and state (MESA plus MrOS data) were estimated using bootstrapping. RESULTS Within-night repeatability for traits ranged from R=0.62-0.79 and improved to R=0.69-0.83 when recommended amounts of data were available (20-35 seven-min windows, available in 94-98% of participants); repeatability was similar for collapsibility, loop gain, and arousal threshold (R=0.79-0.83), but lower for compensation (R=0.69). Long-term consistency was modest (R=0.30-0.61) and improved (R=0.36-0.63) after accounting for position and state differences. Position/state analysis revealed reduced loop gain in REM and reduced collapsbility in N3. CONCLUSIONS Endotypic traits can be obtained with acceptable repeatability. Long-term consistency was modest but improved after accounting for position and state changes. These data support the use of endotypic assessments in large-scale epidemiological studies.
Collapse
Affiliation(s)
- Raichel M Alex
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Tamar Sofer
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Ali Azarbarzin
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Daniel Vena
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Laura K Gell
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Andrew Wellman
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - David P White
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Susan Redline
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| | - Scott A Sands
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, USA
| |
Collapse
|
16
|
Schmickl CN, Orr JE, Kim P, Nokes B, Sands S, Manoharan S, McGinnis L, Parra G, DeYoung P, Owens RL, Malhotra A. Point-of-care prediction model of loop gain in patients with obstructive sleep apnea: development and validation. BMC Pulm Med 2022; 22:158. [PMID: 35468829 PMCID: PMC9036750 DOI: 10.1186/s12890-022-01950-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 04/13/2022] [Indexed: 11/10/2022] Open
Abstract
Background High loop gain (unstable ventilatory control) is an important—but difficult to measure—contributor to obstructive sleep apnea (OSA) pathogenesis, predicting OSA sequelae and/or treatment response. Our objective was to develop and validate a clinical prediction tool of loop gain. Methods A retrospective cohort of consecutive adults with OSA (apnea–hypopnea index, AHI > 5/hour) based on in-laboratory polysomnography 01/2017–12/2018 was randomly split into a training and test-set (3:1-ratio). Using a customized algorithm (“reference standard”) loop gain was quantified from raw polysomnography signals on a continuous scale and additionally dichotomized (high > 0.7). Candidate predictors included general patient characteristics and routine polysomnography data. The model was developed (training-set) using linear regression with backward selection (tenfold cross-validated mean square errors); the predicted loop gain of the final linear regression model was used to predict loop gain class. More complex, alternative models including lasso regression or random forests were considered but did not meet pre-specified superiority-criteria. Final model performance was validated on the test-set. Results The total cohort included 1055 patients (33% high loop gain). Based on the final model, higher AHI (beta = 0.0016; P < .001) and lower hypopnea-percentage (beta = −0.0019; P < .001) predicted higher loop gain values. The predicted loop gain showed moderate-to-high correlation with the reference loop gain (r = 0.48; 95% CI 0.38–0.57) and moderate discrimination of patients with high versus low loop gain (area under the curve = 0.73; 95% CI 0.67–0.80). Conclusion To our knowledge this is the first prediction model of loop gain based on readily-available clinical data, which may facilitate retrospective analyses of existing datasets, better patient selection for clinical trials and eventually clinical practice.
Supplementary Information The online version contains supplementary material available at 10.1186/s12890-022-01950-y.
Collapse
Affiliation(s)
- Christopher N Schmickl
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA.
| | - Jeremy E Orr
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| | - Paul Kim
- Division of Cardiology, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| | - Brandon Nokes
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| | - Scott Sands
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Sreeganesh Manoharan
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| | - Lana McGinnis
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| | - Gabriela Parra
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| | - Pamela DeYoung
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| | - Robert L Owens
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| | - Atul Malhotra
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego (UCSD), San Diego, CA, 92037, USA
| |
Collapse
|
17
|
Dutta R, Tong BK, Eckert DJ. Development of a physiological-based model that uses standard polysomnography and clinical data to predict oral appliance treatment outcomes in obstructive sleep apnea. J Clin Sleep Med 2022; 18:861-870. [PMID: 34710038 PMCID: PMC8883098 DOI: 10.5664/jcsm.9742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVES Oral appliance (OA) therapy is a well-tolerated alternative to continuous positive airway pressure. However, it is less efficacious. A major unresolved clinical challenge is the inability to accurately predict who will respond to OA therapy. We recently developed a model to estimate obstructive sleep apnea pathophysiological endotypes. This study aimed to apply this physiological-based model to predict OA treatment responses. METHODS Sixty-two men and women with obstructive sleep apnea (aged 29-71 years) were studied to investigate the efficacy of a novel OA device. An in-laboratory diagnostic followed by an OA treatment efficacy polysomnography were performed. Seven polysomnography variables from the diagnostic study plus age and body mass index were included in our machine-learning-based model to predict OA therapy response according to standard apnea-hypopnea index (AHI) definitions. Initially, the model was trained on data from the first 45 participants using 10-fold cross-validation. A blinded independent validation was then performed for the remaining 17 participants. RESULTS Mean accuracy of the trained model to predict OA therapy responders vs nonresponders (AHI < 5 events/h) using 10-fold cross-validation was 91% ± 8%. In the independent blinded validation, 100% (AHI < 5 events/h); 59% (AHI < 10 events/h); 71% (50% reduction in AHI); and 82% (50% reduction in AHI to < 20 events/h) of the 17 participants were correctly classified for each of the treatment outcome definitions respectively. CONCLUSIONS While further evaluation in larger clinical data sets is required, these findings highlight the potential to use routinely collected sleep study and clinical data with machine learning-based approaches underpinned by obstructive sleep apnea endotype concepts to help predict treatment outcomes to OA therapy for people with obstructive sleep apnea. CITATION Dutta R, Tong BK, Eckert DJ. Development of a physiological-based model that uses standard polysomnography and clinical data to predict oral appliance treatment outcomes in obstructive sleep apnea. J Clin Sleep Med. 2022;18(3):861-870.
Collapse
Affiliation(s)
- Ritaban Dutta
- Data61, Commonwealth Scientific and Industrial Research Organisation, Hobart, Tasmania, Australia
| | - Benjamin K. Tong
- Neuroscience Research Australia, Randwick Sydney, New South Wales, Australia,School of Medical Sciences, University of New South Wales, Kensington Sydney, New South Wales, Australia
| | - Danny J. Eckert
- Neuroscience Research Australia, Randwick Sydney, New South Wales, Australia,School of Medical Sciences, University of New South Wales, Kensington Sydney, New South Wales, Australia,Adelaide Institute for Sleep Health and Flinders Health and Medical Research Institute, Flinders University, Bedford Park Adelaide, South Australia, Australia,Address correspondence to: Danny J. Eckert, PhD, Adelaide Institute for Sleep Health, Flinders University, 5 Laffer Drive, Bedford Park, South Australia, Australia 5042; Tel: +61 8 7421 9780;
| |
Collapse
|
18
|
The utility of acoustic pharyngometry in treatment of obstructive sleep apnea patients with expansion sphincter pharyngoplasty surgery. Sleep Breath 2022; 26:1955-1962. [DOI: 10.1007/s11325-021-02554-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 12/07/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022]
|
19
|
Van den Bossche K, Van de Perck E, Wellman A, Kazemeini E, Willemen M, Verbraecken J, Vanderveken OM, Vena D, Op de Beeck S. Comparison of Drug-Induced Sleep Endoscopy and Natural Sleep Endoscopy in the Assessment of Upper Airway Pathophysiology During Sleep: Protocol and Study Design. Front Neurol 2021; 12:768973. [PMID: 34950101 PMCID: PMC8690862 DOI: 10.3389/fneur.2021.768973] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 11/15/2021] [Indexed: 11/13/2022] Open
Abstract
Study Objectives: Obstructive sleep apnea (OSA) is increasingly recognized as a complex and heterogenous disorder. As a result, a "one-size-fits-all" management approach should be avoided. Therefore, evaluation of pathophysiological endotyping in OSA patients is emphasized, with upper airway collapse during sleep as one of the main features. To assess the site(s) and pattern(s) of upper airway collapse, natural sleep endoscopy (NSE) is defined as the gold standard. As NSE is labor-intensive and time-consuming, it is not feasible in routine practice. Instead, drug-induced sleep endoscopy (DISE) is the most frequently used technique and can be considered as the clinical standard. Flow shape and snoring analysis are non-invasive measurement techniques, yet are still evolving. Although DISE is used as the clinical alternative to assess upper airway collapse, associations between DISE and NSE observations, and associated flow and snoring signals, have not been quantified satisfactorily. In the current project we aim to compare upper airway collapse identified in patients with OSA using endoscopic techniques as well as flow shape analysis and analysis of tracheal snoring sounds between natural and drug-induced sleep. Methods: This study is a blinded prospective comparative multicenter cohort study. The study population will consist of adult patients with a recent diagnosis of OSA. Eligible patients will undergo a polysomnography (PSG) with NSE overnight and a DISE within 3 months. During DISE the upper airway is assessed under sedation by an experienced ear, nose, throat (ENT) surgeon using a flexible fiberoptic endoscope in the operating theater. In contrast to DISE, NSE is performed during natural sleep using a pediatric bronchoscope. During research DISE and NSE, the standard set-up is expanded with additional PSG measurements, including gold standard flow and analysis of tracheal snoring sounds. Conclusions: This project will be one of the first studies to formally compare collapse patterns during natural and drug-induced sleep. Moreover, this will be, to the authors' best knowledge, the first comparative research in airflow shape and tracheal snoring sounds analysis between DISE and NSE. These novel and non-invasive diagnostic methods studying upper airway mechanics during sleep will be simultaneously validated against DISE and NSE. Clinical Trial Registration: www.ClinicalTrials.gov, identifier: NCT04729478.
Collapse
Affiliation(s)
- Karlien Van den Bossche
- Department of ENT and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
- Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - Eli Van de Perck
- Department of ENT and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
- Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - Andrew Wellman
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Elahe Kazemeini
- Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - Marc Willemen
- Multidisciplinary Sleep Disorders Center, Antwerp University Hospital, Edegem, Belgium
| | - Johan Verbraecken
- Department of ENT and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
- Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
- Multidisciplinary Sleep Disorders Center, Antwerp University Hospital, Edegem, Belgium
| | - Olivier M. Vanderveken
- Department of ENT and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
- Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
- Multidisciplinary Sleep Disorders Center, Antwerp University Hospital, Edegem, Belgium
| | - Daniel Vena
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States
| | - Sara Op de Beeck
- Department of ENT and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
- Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
- Multidisciplinary Sleep Disorders Center, Antwerp University Hospital, Edegem, Belgium
| |
Collapse
|
20
|
Pépin JL, Eastwood P, Eckert DJ. Novel avenues to approach non-CPAP therapy and implement comprehensive OSA care. Eur Respir J 2021; 59:13993003.01788-2021. [PMID: 34824053 DOI: 10.1183/13993003.01788-2021] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 09/16/2021] [Indexed: 11/05/2022]
Abstract
Recent advances in obstructive sleep apnoea (OSA) pathophysiology and translational research have opened new lines of investigation for OSA treatment and management. Key goals of such investigations are to provide efficacious, alternative treatment and management pathways that are better tailored to individual risk profiles to move beyond the traditional, continuous positive airway pressure (CPAP)-focused, "one size fits all", trial and error approach which is too frequently inadequate for many patients. Identification of different clinical manifestations of OSA (clinical phenotypes) and underlying pathophysiological phenotypes (endotypes), that contribute to OSA have provided novel insights into underlying mechanisms and have underpinned these efforts. Indeed, this new knowledge has provided the framework for precision medicine for OSA to improve treatment success rates with existing non-CPAP therapies such as mandibular advancement devices and upper airway surgery, and newly developed therapies such as hypoglossal nerve stimulation and emerging therapies such as pharmacotherapies and combination therapy. These concepts have also provided insight into potential physiological barriers to CPAP adherence for certain patients. This review summarises the recent advances in OSA pathogenesis, non-CPAP treatment, clinical management approaches and highlights knowledge gaps for future research. OSA endotyping and clinical phenotyping, risk stratification and personalised treatment allocation approaches are rapidly evolving and will further benefit from the support of recent advances in e-health and artificial intelligence.
Collapse
Affiliation(s)
- Jean-Louis Pépin
- HP2 Laboratory, INSERM U1042, University Grenoble Alpes, Grenoble, France .,EFCR Laboratory, Grenoble Alpes University Hospital, Grenoble, France
| | - Peter Eastwood
- Flinders Health and Medical Research Institute and Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Bedford Park, South Australia, Australia
| | - Danny J Eckert
- Flinders Health and Medical Research Institute and Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Bedford Park, South Australia, Australia
| |
Collapse
|
21
|
Mandibular Advancement Device Treatment Efficacy Is Associated with Polysomnographic Endotypes. Ann Am Thorac Soc 2021; 18:511-518. [PMID: 32946702 DOI: 10.1513/annalsats.202003-220oc] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Rationale: Mandibular advancement device (MAD) treatment efficacy varies among patients with obstructive sleep apnea.Objectives: The current study aims to explain underlying individual differences in efficacy using obstructive sleep apnea endotypic traits calculated from baseline clinical polysomnography: collapsibility (airflow at normal ventilatory drive), loop gain (drive response to reduced airflow), arousal threshold (drive preceding arousal), compensation (increase in airflow as drive increases), and the ventilatory response to arousal (increase in drive explained by arousal). On the basis of previous research, we hypothesized that responders to MAD treatment have a lower loop gain and milder collapsibility.Methods: Thirty-six patients (median apnea-hypopnea index [AHI], 23.5 [interquartile range (IQR), 19.7-29.8] events/h) underwent baseline and 3-month follow-up full polysomnography, with MAD fixed at 75% of maximal protrusion. Traits were estimated using baseline polysomnography according to Sands and colleagues. Response was defined as an AHI reduction ≥ 50%.Results: MAD treatment significantly reduced AHI (49.7%baseline [23.9-63.6], median [IQR]). Responders exhibited lower loop gain (mean [95% confidence interval], 0.53 [0.48-0.58] vs. 0.65 [0.57-0.73]; P = 0.020) at baseline than nonresponders, a difference that persisted after adjustment for baseline AHI and body mass index. Elevated loop gain remained associated with nonresponse after adjustment for collapsibility (odds ratio, 3.03 [1.16-7.88] per 1-standard deviation (SD) increase in loop gain [SD, 0.15]; P = 0.023).Conclusions: MAD nonresponders exhibit greater ventilatory instability, expressed as higher loop gain. Assessment of the baseline degree of ventilatory instability using this approach may improve upfront MAD treatment patient selection.Clinical trial registered with www.clinicaltrials.gov (NCT01532050).
Collapse
|
22
|
Suurna MV, Jacobowitz O, Chang J, Koutsourelakis I, Smith D, Alkan U, D'Agostino M, Boon M, Heiser C, Hoff P, Huntley C, Kent D, Kominsky A, Lewis R, Maurer JT, Ravesloot M, Soose R, Steffen A, Weaver E, Williams AM, Woodson T, Yaremchuk K, Ishman SL. Improving outcomes of hypoglossal nerve stimulation therapy: current practice, future directions and research gaps. Proceedings of the 2019 International Sleep Surgery Society Research Forum. J Clin Sleep Med 2021; 17:2477-2487. [PMID: 34279214 DOI: 10.5664/jcsm.9542] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Hypoglossal nerve stimulation (HGNS) has evolved as a novel and effective therapy for patients with moderate-to-severe obstructive sleep apnea (OSA). Despite positive published outcomes of HGNS, there exist uncertainties regarding proper patient selection, surgical technique, and the reporting of outcomes and individual factors that impact therapy effectiveness. According to current guidelines, this therapy is indicated for select patients, and recommendations are based on the Stimulation Therapy for Apnea Reduction (STAR) trial. Ongoing research and physician experiences continuously improve methods to optimize the therapy. An understanding of the way in which airway anatomy, OSA phenotypes, individual health status, psychological conditions and comorbid sleep disorders influence the effectiveness of HGNS is essential to improve outcomes and expand therapy indications. This manuscript presents discussions on current evidence, future directions, and research gaps for HGNS therapy from the 10th International Surgical Sleep Society expert research panel.
Collapse
Affiliation(s)
- Maria V Suurna
- Division of Sleep Surgery, Department of Otolaryngology - Head and Neck Surgery, Weill Cornell Medicine/New York Presbyterian Hospital, New York, NY
| | | | - Jolie Chang
- Division of Sleep Surgery, Department of Otolaryngology - Head and Neck Surgery, University of California, San Francisco, CA
| | | | - David Smith
- Divisions of Pediatric Otolaryngology, Pulmonary Medicine, and the Sleep Center; Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Otolaryngology - Head and Neck Surgery of University of Cincinnati College of Medicine, Cincinnati, OH
| | - Uri Alkan
- Department of Otorhinolaryngology, Head and Neck Surgery, Rabin Medical Center, Beilinson Hospital, Petach Tikva, and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Mark D'Agostino
- Southern New England Ear, Nose, Throat and Facial Plastic Surgery Group and Middlesex Hospital, Middletown, CT
| | - Maurits Boon
- Otolaryngology - Head and Neck Surgery, Thomas Jefferson University Hospital
| | - Clemens Heiser
- Department of Otorhinolaryngology, Head and Neck Surgery, Technische Universität München, Munich, Germany
| | - Paul Hoff
- Department of Otolaryngology, University of Michigan, Ann Arbor, MI
| | - Colin Huntley
- Otolaryngology - Head and Neck Surgery, Thomas Jefferson University Hospital
| | - David Kent
- Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, TN
| | - Alan Kominsky
- Head and Neck Institute, Cleveland Clinic, Cleveland, OH
| | - Richard Lewis
- Perth Head & Neck Surgery, Hollywood Medical Centre, Nedlands, Australia
| | - Joachim T Maurer
- Division of Sleep Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | | | - Ryan Soose
- Division of Sleep Surgery, Department of Otolaryngology, Pittsburgh School of Medicine, UPMC Mercy, University of Pittsburgh, Pittsburgh, PA
| | - Armin Steffen
- Department of otorhinolaryngology, University of Lübeck, Lübeck, Germany
| | - Edward Weaver
- Department of Otolaryngology-Head and Neck Surgery, University of Washington; Surgery Service, Seattle Veterans Affairs Medical Center; Harborview Medical Center, Seattle, WA
| | - Amy M Williams
- Department of Otolaryngology - Head & Neck Surgery of Henry Ford Health System, Detroit, MI
| | - Tucker Woodson
- Division of Sleep Medicine and Sleep Surgery, Department of Otolaryngology and Human Communication of Medical College of Wisconsin, Milwaukee, WI
| | - Kathleen Yaremchuk
- Department of Otolaryngology - Head & Neck Surgery of Henry Ford Health System, Detroit, MI
| | - Stacey L Ishman
- Divisions of Pediatric Otolaryngology, Pulmonary Medicine, and the Sleep Center; Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Otolaryngology - Head and Neck Surgery of University of Cincinnati College of Medicine, Cincinnati, OH
| |
Collapse
|
23
|
Mann DL, Georgeson T, Landry SA, Edwards BA, Azarbarzin A, Vena D, Hess LB, Wellman A, Redline S, Sands SA, Terrill PI. Frequency of flow limitation using airflow shape. Sleep 2021; 44:6317693. [PMID: 34240221 DOI: 10.1093/sleep/zsab170] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 06/27/2021] [Indexed: 12/26/2022] Open
Abstract
STUDY OBJECTIVES The presence of flow limitation during sleep is associated with adverse health consequences independent of obstructive sleep apnea (OSA) severity (apnea-hypopnea index, AHI), but remains extremely challenging to quantify. Here we present a unique library and an accompanying automated method that we apply to investigate flow limitation during sleep. METHODS A library of 117,871 breaths (N=40 participants) were visually classified (certain flow limitation, possible flow limitation, normal) using airflow shape and physiological signals (ventilatory drive per intra-esophageal diaphragm EMG). An ordinal regression model was developed to quantify flow limitation certainty using flow-shape features (e.g. flattening, scooping); breath-by-breath agreement (Cohen's ƙ) and overnight flow limitation frequency (R 2, %breaths in certain or possible categories during sleep) were compared against visual scoring. Subsequent application examined flow limitation frequency during arousals and stable breathing, and associations with ventilatory drive. RESULTS The model (23 features) assessed flow limitation with good agreement (breath-by-breath ƙ=0.572, p<0.001) and minimal error (overnight flow limitation frequency R 2=0.86, error=7.2%). Flow limitation frequency was largely independent of AHI (R 2=0.16) and varied widely within individuals with OSA (74[32-95]%breaths, mean[range], AHI>15/hr, N=22). Flow limitation was unexpectedly frequent but variable during arousals (40[5-85]%breaths) and stable breathing (58[12-91]%breaths), and was associated with elevated ventilatory drive (R 2=0.26-0.29; R 2<0.01 AHI v. drive). CONCLUSIONS Our method enables quantification of flow limitation frequency, a key aspect of obstructive sleep-disordered breathing that is independent of the AHI and often unavailable. Flow limitation frequency varies widely between individuals, is prevalent during arousals and stable breathing, and reveals elevated ventilatory drive.
Collapse
Affiliation(s)
- Dwayne L Mann
- School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Australia.,Institute for Social Science Research, The University of Queensland, Brisbane, Australia.,Department of Physiology, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, VIC, Australia
| | - Thomas Georgeson
- School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Australia.,Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Shane A Landry
- Department of Physiology, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, VIC, Australia.,School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, VIC, Australia
| | - Bradley A Edwards
- Department of Physiology, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, VIC, Australia.,School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, VIC, Australia
| | - Ali Azarbarzin
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham & Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Daniel Vena
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham & Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Lauren B Hess
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham & Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Andrew Wellman
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham & Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Susan Redline
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham & Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Scott A Sands
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham & Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Philip I Terrill
- School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Australia
| |
Collapse
|
24
|
OSA Upper Airways Surgery: A Targeted Approach. ACTA ACUST UNITED AC 2021; 57:medicina57070690. [PMID: 34356971 PMCID: PMC8305825 DOI: 10.3390/medicina57070690] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 06/24/2021] [Accepted: 06/28/2021] [Indexed: 01/12/2023]
Abstract
Obstructive sleep apnea syndrome (OSA) is a multi-factorial disorder, with quite complex endotypes, consisting of anatomical and non-anatomical pathophysiological factors. Continuous positive airway pressure (CPAP) is recognized as the first-line standard treatment for OSA, whereas upper airway (UA) surgery is often recommended for treating OSA patients who have refused or cannot tolerate CPAP. The main results achievable by the surgery are UA expansion, and/or stabilization, and/or removal of the obstructive tissue to different UA levels. The site and pattern of UA collapse identification is of upmost importance in selecting the customized surgical procedure to perform, as well as the identification of the relation between anatomical and non-anatomical factors in each patient. Medical history, sleep studies, clinical examination, UA endoscopy in awake and drug-induced sedation, and imaging help the otorhinolaryngologist in selecting the surgical candidate, identifying OSA patients with mild UA collapsibility or tissue UA obstruction, which allow achievement of the best surgical outcomes. Literature data reported that the latest palatal surgical procedures, such as expansion sphincter palatoplasty or barbed reposition palatoplasty, which achieve soft palatal and lateral pharyngeal wall remodeling and stiffening, improved the Apnea Hypopnea Index, but the outcome analyses are still limited by methodological bias and the limited number of patients' in each study. Otherwise, the latest literature data have also demonstrated the role of UA surgery in the improvement of non-anatomical factors, confirming that a multidisciplinary and multimodality diagnostic and therapeutical approach to OSA patients could allow the best selection of customized treatment options and outcomes.
Collapse
|
25
|
Bosi M, Incerti Parenti S, Sanna A, Plazzi G, De Vito A, Alessandri-Bonetti G. Non-continuous positive airway pressure treatment options in obstructive sleep apnoea: A pathophysiological perspective. Sleep Med Rev 2021; 60:101521. [PMID: 34280847 DOI: 10.1016/j.smrv.2021.101521] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 06/02/2021] [Accepted: 06/24/2021] [Indexed: 12/16/2022]
Abstract
The phenotyping of the pathophysiology of obstructive sleep apnoea (OSA) lies at the core of tailored treatments and it is one of the most debated topics in sleep medicine research. Recent sophisticated techniques have broadened the horizon for gaining insight into the variability of the endotypic traits in patients with OSA which account for the heterogeneity in the clinical presentation of the disease and consequently, in the outcome of treatment. However, the implementation of these concepts into clinical practice is still a major challenge for both researchers and clinicians in order to develop tailored therapies targeted to specific endotypic traits that contribute to OSA in each individual patient. This review summarizes available scientific evidence in order to point out the links between endotypic traits (pharyngeal airway collapsibility, upper airway neuromuscular compensation, loop gain and arousal threshold) and the most common non-continuous positive airway pressure (CPAP) treatment options for OSA (mandibular advancement device, upper airway surgery, medication therapy, positional therapy) and to clarify to what extent endotypic traits could help to better predict the success of these therapies. A narrative guide is provided; current design limitations and future avenues of research are discussed, with clinical and research perspectives.
Collapse
Affiliation(s)
- Marcello Bosi
- Centro Disturbi del Sonno, Ospedali Privati Forlì, Forlì, Italy
| | - Serena Incerti Parenti
- Unit of Orthodontics and Sleep Dentistry, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Antonio Sanna
- Azienda USL Toscana Centro, Pneumology and Bronchial Endoscopy Unit, San Giuseppe Hospital, Empoli, FI, Italy
| | - Giuseppe Plazzi
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy; Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio-Emilia, Modena, Italy
| | - Andrea De Vito
- Head & Neck Department, ENT Unit, Ravenna Hospital, Romagna Health Service, Italy
| | - Giulio Alessandri-Bonetti
- Unit of Orthodontics and Sleep Dentistry, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy.
| |
Collapse
|
26
|
A Phenotypic Approach for Personalised Management of Obstructive Sleep Apnoea. CURRENT OTORHINOLARYNGOLOGY REPORTS 2021. [DOI: 10.1007/s40136-021-00346-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
27
|
Finnsson E, Ólafsdóttir GH, Loftsdóttir DL, Jónsson SÆ, Helgadóttir H, Ágústsson JS, Sands SA, Wellman A. A scalable method of determining physiological endotypes of sleep apnea from a polysomnographic sleep study. Sleep 2021; 44:5905594. [PMID: 32929467 PMCID: PMC7819840 DOI: 10.1093/sleep/zsaa168] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 07/22/2020] [Indexed: 12/15/2022] Open
Abstract
Sleep apnea is caused by several endophenotypic traits, namely pharyngeal collapsibility, poor muscle compensation, ventilatory instability (high loop gain), and arousability from sleep (low arousal threshold). Measures of these traits have shown promise for predicting outcomes of therapies (e.g. oral appliances, surgery, hypoglossal nerve stimulation, CPAP, and pharmaceuticals), which may become an integral part of precision sleep medicine. Currently, the methods Sands et al. developed for endotyping sleep apnea from polysomnography (PSG) are embedded in the original authors' code, which is computationally expensive and requires technological expertise to run. We present a reimplementation and validation of the integrity of the original authors' code by reproducing the endo-Phenotyping Using Polysomnography (PUP) method of Sands et al. The original MATLAB methods were reprogrammed in Python; efficient algorithms were developed to detect breaths, calculate normalized ventilation (moving time-average), and model ventilatory drive (intended ventilation). The new implementation (PUPpy) was validated by comparing the endotypes from PUPpy with the original PUP results. Both endotyping methods were applied to 38 manually scored polysomnographic studies. Results of the new implementation were strongly correlated with the original (p < 10-6 for all): ventilation at eupnea V̇ passive (ICC = 0.97), ventilation at arousal onset V̇ active (ICC = 0.97), loop gain (ICC = 0.96), and arousal threshold (ICC = 0.90). We successfully implemented the original PUP method by Sands et al. providing further evidence of its integrity. Additionally, we created a cloud-based version for scaling up sleep apnea endotyping that can be used more easily by a wider audience of researchers and clinicians.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Scott A Sands
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Andrew Wellman
- Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| |
Collapse
|
28
|
Carter SG, Eckert DJ. Effects of hypnotics on obstructive sleep apnea endotypes and severity: Novel insights into pathophysiology and treatment. Sleep Med Rev 2021; 58:101492. [PMID: 33965721 DOI: 10.1016/j.smrv.2021.101492] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 04/07/2021] [Accepted: 04/07/2021] [Indexed: 02/06/2023]
Abstract
Impaired upper airway anatomy is the main cause of obstructive sleep apnea (OSA). However, there are other important non-anatomical contributors or "endotypes" including ventilatory control instability, poor pharyngeal dilator muscle responsiveness and waking up too easily to minor respiratory events (low arousal threshold). Recent studies have focused on the potential to target specific OSA causes with novel treatments to reduce OSA severity and improve efficacy with existing non-CPAP therapies which are often suboptimal (e.g., mandibular advancement splints). One novel target is pharmacotherapy with hypnotics to increase the threshold for arousal and reduce OSA severity in the approximately 30% of patients who have a low arousal threshold endotype. This increasing body of work has produced varied and at times unexpected findings which have challenged previous knowledge on the effects of hypnotics on upper airway physiology and breathing during sleep in people with OSA. This review provides a concise overview of the latest research that has investigated the effects of common hypnotics/sedative agents on upper airway physiology and OSA severity and potential implications for OSA pathophysiology, treatment and safety. This includes a summary of the latest knowledge on the effects of hypnotics on OSA endotypes. Priorities for future research are also highlighted.
Collapse
Affiliation(s)
- Sophie G Carter
- Neuroscience Research Australia (NeuRA) Barker Street and the University of New South Wales, Sydney, NSW, Australia
| | - Danny J Eckert
- Flinders Health and Medical Research Institute, Adelaide Institute for Sleep Health, Flinders University, Adelaide, SA, Australia.
| |
Collapse
|
29
|
Op de Beeck S, Wellman A, Dieltjens M, Strohl KP, Willemen M, Van de Heyning PH, Verbraecken JA, Vanderveken OM, Sands SA. Endotypic Mechanisms of Successful Hypoglossal Nerve Stimulation for Obstructive Sleep Apnea. Am J Respir Crit Care Med 2021; 203:746-755. [PMID: 32970962 DOI: 10.1164/rccm.202006-2176oc] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Rationale: Approximately one-third of patients with obstructive sleep apnea (OSA) treated with hypoglossal nerve stimulation (HGNS) therapy are incomplete responders, despite careful patient selection based on baseline characteristics and drug-induced sleep endoscopy.Objectives: Here we use polysomnographic endotyping to assess the pathophysiological mechanisms underlying favorable versus incomplete responses to HGNS therapy.Methods: Baseline polysomnography data of the STAR (Stimulation Therapy for Apnea Reduction) trial were included. Raw baseline polysomnographic data from 91/126 patients were available for analysis. Traits-loop gain, arousal threshold, collapsibility, and muscle compensation-were calculated from the baseline polysomnography data according to Sands and colleagues (AJRCCM 2018, SLEEP 2018). Logistic regression assessed apnea-hypopnea index (AHI)-adjusted associations between HGNS response (>50% reduction in AHI to <10/h at 1 yr) and OSA traits.Measurements and Main Results: Overall, HGNS treatment reduced AHI from 30.7 (24.9-39.9) to 8.5 (4.0-19.5) events/h (P < 0.0001; median [quartiles 1-3]); N = 53/91 were responders. In adjusted analysis, a favorable response to therapy was independently associated with higher arousal threshold (odds ratio [95% confidence interval]: 6.76 [2.44-23.3], P = 0.001), greater compensation (odds ratio: 4.22 [1.70-12.55] per SD, P = 0.004), and lower loop gain (in milder collapsibility, per significant interaction, P = 0.003). The higher arousal threshold was evident in responders before adjusted analysis. Predicted responders had an approximately fourfold lower treatment AHI versus predicted nonresponders (4.9 [2.7-8.5] vs. 20.7 [10.9-29.7], P < 0.0001; median [quartiles 1-3]); differences remained significant after cross-validation.Conclusions: Favorable responses to HGNS therapy are associated with the pathophysiological traits causing OSA, particularly a higher arousal threshold. Along with established criteria, individuals with favorable traits could potentially be prioritized for precision HGNS therapy.This analysis was a secondary analysis of the STAR trial registered with clinicaltrials.gov (NCT01161420).
Collapse
Affiliation(s)
- Sara Op de Beeck
- Translational Neurosciences, Faculty of Medicine and Health Sciences, and.,Department of Ear, Nose, and Throat, Head and Neck Surgery.,Multidisciplinary Sleep Disorders Centre, and
| | - Andrew Wellman
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts; and
| | - Marijke Dieltjens
- Translational Neurosciences, Faculty of Medicine and Health Sciences, and.,Department of Ear, Nose, and Throat, Head and Neck Surgery
| | - Kingman P Strohl
- Department of Medicine, Case Western Reserve University, Cleveland, Ohio
| | | | - Paul H Van de Heyning
- Translational Neurosciences, Faculty of Medicine and Health Sciences, and.,Department of Ear, Nose, and Throat, Head and Neck Surgery
| | - Johan A Verbraecken
- Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Multidisciplinary Sleep Disorders Centre, and.,Department of Pulmonology, Antwerp University Hospital, Edegem, Belgium
| | - Olivier M Vanderveken
- Translational Neurosciences, Faculty of Medicine and Health Sciences, and.,Department of Ear, Nose, and Throat, Head and Neck Surgery.,Multidisciplinary Sleep Disorders Centre, and
| | - Scott A Sands
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts; and
| | | |
Collapse
|
30
|
Koka V, De Vito A, Roisman G, Petitjean M, Filograna Pignatelli GR, Padovani D, Randerath W. Orofacial Myofunctional Therapy in Obstructive Sleep Apnea Syndrome: A Pathophysiological Perspective. ACTA ACUST UNITED AC 2021; 57:medicina57040323. [PMID: 33915707 PMCID: PMC8066493 DOI: 10.3390/medicina57040323] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 01/02/2023]
Abstract
Obstructive sleep apnea (OSA) syndrome is a multi-factorial disorder. Recently identified pathophysiological contributing factors include airway collapsibility, poor pharyngeal muscle responsiveness, a low arousal threshold, and a high loop gain. Understanding the pathophysiology is of pivotal importance to select the most effective treatment option. It is well documented that conventional treatments (continuous positive airway pressure (CPAP), upper airway surgery, and dental appliance) may not always be successful in the presence of non-anatomical traits, especially in mild to moderate OSA. Orofacial myofunctional therapy (OMT) consists of isotonic and isometric exercises targeted to oral and oropharyngeal structures, with the aim of increasing muscle tone, endurance, and coordinated movements of pharyngeal and peripharyngeal muscles. Recent studies have demonstrated the efficacy of OMT in reducing snoring, apnea-hypopnea index, and daytime sleepiness, and improving oxygen saturations and sleep quality. Myofunctional therapy helps to reposition the tongue, improve nasal breathing, and increase muscle tone in pediatric and adult OSA patients. Studies have shown that OMT prevents residual OSA in children after adenotonsillectomy and helps adherence in CPAP-treated OSA patients. Randomized multi-institutional studies will be necessary in the future to determine the effectiveness of OMT in a single or combined modality targeted approach in the treatment of OSA. In this narrative review, we present up-to-date literature data, focusing on the role of OSA pathophysiology concepts concerning pharyngeal anatomical collapsibility and muscle responsiveness, underlying the response to OMT in OSA patients.
Collapse
Affiliation(s)
- Venkata Koka
- Department of Sleep Medicine, Hospital Antoine Beclere, 92140 Clamart, France; (G.R.); (M.P.)
- Correspondence: (V.K.); (A.D.V.)
| | - Andrea De Vito
- Ear Nose Throat (ENT) Unit, Head & Neck Department, Santa Maria delle Croci Hospital, Romagna Health Service, 48121 Ravenna, Italy; (G.R.F.P.); (D.P.)
- Correspondence: (V.K.); (A.D.V.)
| | - Gabriel Roisman
- Department of Sleep Medicine, Hospital Antoine Beclere, 92140 Clamart, France; (G.R.); (M.P.)
| | - Michel Petitjean
- Department of Sleep Medicine, Hospital Antoine Beclere, 92140 Clamart, France; (G.R.); (M.P.)
| | - Giulio Romano Filograna Pignatelli
- Ear Nose Throat (ENT) Unit, Head & Neck Department, Santa Maria delle Croci Hospital, Romagna Health Service, 48121 Ravenna, Italy; (G.R.F.P.); (D.P.)
| | - Davide Padovani
- Ear Nose Throat (ENT) Unit, Head & Neck Department, Santa Maria delle Croci Hospital, Romagna Health Service, 48121 Ravenna, Italy; (G.R.F.P.); (D.P.)
| | - Winfried Randerath
- Clinic of Pneumology and Allergology, Center for Sleep Medicine and Respiratory Care, Institute for Pneumology at the University Witten/Herdecke, 42699 Solingen, Germany;
| |
Collapse
|
31
|
Joosten SA, Tan M, Wong AM, Landry SA, Leong P, Sands SA, Beatty C, Thomson L, Stonehouse J, Turton A, Hamilton GS, Edwards BA. A randomized controlled trial of oxygen therapy for patients who do not respond to upper airway surgery for obstructive sleep apnea. J Clin Sleep Med 2021; 17:445-452. [PMID: 33094725 DOI: 10.5664/jcsm.8920] [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: 12/13/2022]
Abstract
STUDY OBJECTIVES We aimed to determine whether patients diagnosed with obstructive sleep apnea (OSA) who fail to respond to upper airway surgery may be successfully treated with supplemental oxygen and whether we could identify baseline physiologic endotypes (ie, collapsibility, loop gain, arousal threshold, and muscle compensation) that predict response to oxygen therapy. METHODS We conducted a single night, randomized double-blinded cross over trial in which patients with OSA who failed to respond to upper airway surgery were treated on separate nights with oxygen therapy (4 L/min) or placebo (medical air). Effect of oxygen/air on OSA on key polysomnography outcomes were assessed: apnea-hypopnea index (AHI), AHI without desaturation (ie, flow-based AHI), arousal index, and morning blood pressure. OSA endotypes were estimated from the polysomnography signals to determine whether baseline OSA physiology could be used to predict response to oxygen therapy. RESULTS There was a statistically significant reduction in AHI and flow-based AHI on oxygen vs placebo (flow-based AHI: 42.4 ± 21.5 vs 30.5 ± 17.1 events/h, P = .008). Arousal index was also reduced on oxygen vs placebo (41.1 ± 19.5 vs 33.0 ± 15.3 events/h, P = .006). There was no significant difference in morning blood pressure between oxygen and placebo. Although 7 of 20 individuals experienced a 50% reduction or greater in flow-based AHI on oxygen (responders), there was no difference in the baseline OSA endotypes (or clinical characteristics) between responders and nonresponders. CONCLUSIONS Our findings demonstrate that a proportion of patients who fail to respond to upper airway surgery for OSA respond acutely to treatment with supplemental oxygen. CLINICAL TRIAL REGISTRATION Registry: Australian New Zealand Clinical Trials Registry; Name: Oxygen therapy for treating patients with residual obstructive sleep apnea following upper airway surgery; URL: https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=373566; Identifier: ACTRN12617001361392.
Collapse
Affiliation(s)
- Simon A Joosten
- Monash Lung and Sleep, Monash Medical Centre, Clayton, Victoria, Australia.,School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia.,Monash Partners-Epworth, Melbourne, Victoria, Australia.,Contributed equally
| | - Michael Tan
- Monash Lung and Sleep, Monash Medical Centre, Clayton, Victoria, Australia.,Contributed equally
| | - Ai-Ming Wong
- Monash Lung and Sleep, Monash Medical Centre, Clayton, Victoria, Australia.,School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Shane A Landry
- Department of Physiology, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, Victoria, Australia.,Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria, Australia
| | - Paul Leong
- Monash Lung and Sleep, Monash Medical Centre, Clayton, Victoria, Australia.,School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Scott A Sands
- Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham & Women's Hospital & Harvard Medical School, Boston, Massachusetts.,The Alfred and Monash University, Melbourne, Victoria, Australia
| | - Caroline Beatty
- Department of Physiology, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, Victoria, Australia.,Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria, Australia
| | - Luke Thomson
- Department of Physiology, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, Victoria, Australia.,Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria, Australia
| | - Jeremy Stonehouse
- Monash Lung and Sleep, Monash Medical Centre, Clayton, Victoria, Australia
| | - Anthony Turton
- Monash Lung and Sleep, Monash Medical Centre, Clayton, Victoria, Australia
| | - Garun S Hamilton
- Monash Lung and Sleep, Monash Medical Centre, Clayton, Victoria, Australia.,School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia.,Monash Partners-Epworth, Melbourne, Victoria, Australia
| | - Bradley A Edwards
- Department of Physiology, School of Biomedical Sciences and Biomedical Discovery Institute, Monash University, Melbourne, Victoria, Australia.,Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria, Australia
| |
Collapse
|
32
|
Siriwardhana LS, Nixon GM, Davey MJ, Mann DL, Landry SA, Edwards BA, Horne RSC. Children with down syndrome and sleep disordered breathing display impairments in ventilatory control. Sleep Med 2020; 77:161-169. [PMID: 33373902 DOI: 10.1016/j.sleep.2020.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 10/22/2022]
Abstract
OBJECTIVES To investigate the role of ventilatory control instability (i.e. loop gain) in children with Down syndrome and sleep disordered breathing. METHODS Children (3-19 years) with Down syndrome and sleep disordered breathing (n = 14) were compared with typically developing children (n = 14) matched for age, sex and sleep disordered breathing severity. All children underwent overnight polysomnography. Spontaneous sighs were identified and a 180s analysis window (60s pre-sigh to 120s post-sigh) containing flow measurements and oxygen saturation were created. Loop gain, a measure of the sensitivity of the negative feedback loop that controls ventilation, was estimated by fitting a mathematical model of ventilatory control to the post-sigh ventilatory pattern. Results; Loop gain was significantly higher in children with Down syndrome compared to matched typically developing children (median loop gain [interquartile range]: 0.36 [0.33, 0.55] vs 0.32 [0.24, 0.38]; P = 0.0395). While children with Down syndrome also had significantly lower average oxygen saturation associated within each analysis window compared to typically developing children (mean ± standard deviation: 96.9 ± 1.3% vs 98.0 ± 1.0%; P = 0.0155), loop gain was not related to polysomnographic measures of hypoxia. CONCLUSIONS Higher loop gain in children with Down syndrome and sleep disordered breathing indicates that these children have more unstable ventilatory control, compared to age, sex and sleep disordered breathing severity matched typically developing children. This may be due to an inherent impairment in ventilatory control in children with Down syndrome contributing to their increased risk of sleep disordered breathing which may inform alternative treatment options for this population.
Collapse
Affiliation(s)
- Leon S Siriwardhana
- The Ritchie Centre, Department of Paediatrics, Monash University and Hudson Institute of Medical Research, Melbourne, Australia
| | - Gillian M Nixon
- The Ritchie Centre, Department of Paediatrics, Monash University and Hudson Institute of Medical Research, Melbourne, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, Australia
| | - Margot J Davey
- The Ritchie Centre, Department of Paediatrics, Monash University and Hudson Institute of Medical Research, Melbourne, Australia; Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, Australia
| | - Dwayne L Mann
- Sleep and Circadian Medicine Laboratory, Department of Physiology, Monash University, Melbourne, Australia; Institute for Social Science Research, The University of Queensland, Brisbane, Australia
| | - Shane A Landry
- Sleep and Circadian Medicine Laboratory, Department of Physiology, Monash University, Melbourne, Australia; School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, Australia
| | - Bradley A Edwards
- Sleep and Circadian Medicine Laboratory, Department of Physiology, Monash University, Melbourne, Australia; School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, Australia
| | - Rosemary S C Horne
- The Ritchie Centre, Department of Paediatrics, Monash University and Hudson Institute of Medical Research, Melbourne, Australia.
| |
Collapse
|
33
|
MacKay SG, Lewis R, McEvoy D, Joosten S, Holt NR. Surgical management of obstructive sleep apnoea: A position statement of the Australasian Sleep Association . Respirology 2020; 25:1292-1308. [PMID: 33190389 PMCID: PMC7839593 DOI: 10.1111/resp.13967] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 09/15/2020] [Accepted: 09/20/2020] [Indexed: 12/11/2022]
Abstract
Surgery for adult obstructive sleep apnoea (OSA) plays a key role in contemporary management paradigms, most frequently as either a second‐line treatment or in a facilitatory capacity. This committee, comprising two sleep surgeons and three sleep physicians, was established to give clarity to that role and expand upon its appropriate use in Australasia. This position statement has been reviewed and approved by the Australasian Sleep Association (ASA) Clinical Committee.
Collapse
Affiliation(s)
- Stuart G MacKay
- University of Wollongong, Wollongong, NSW, Australia.,Illawarra ENT Head and Neck Clinic, Wollongong, NSW, Australia.,Department of Otolaryngology Head and Neck Surgery, The Wollongong Hospital, Wollongong, NSW, Australia
| | - Richard Lewis
- Hollywood Medical Centre, Perth, WA, Australia.,Department of Otolaryngology Head and Neck Surgery, Royal Perth Hospital, Perth, WA, Australia
| | - Doug McEvoy
- Adelaide Institute for Sleep Health, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia.,Respiratory and Sleep Service, Southern Adelaide Local Health Network, Adelaide, SA, Australia
| | - Simon Joosten
- Monash Lung and Sleep, Monash Health, Monash Medical Centre, Melbourne, VIC, Australia.,School of Clinical Sciences, Melbourne, VIC, Australia
| | - Nicolette R Holt
- The Royal Melbourne Hospital, Melbourne, VIC, Australia.,Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| |
Collapse
|
34
|
Journey towards a personalised medicine approach for OSA: Can a similar approach to adult OSA be applied to paediatric OSA? Paediatr Respir Rev 2020; 36:128-135. [PMID: 32217050 DOI: 10.1016/j.prrv.2020.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/21/2020] [Accepted: 01/31/2020] [Indexed: 11/21/2022]
Abstract
The concept of personalised medicine is likely to revolutionise the treatment of adult obstructive sleep apnoea as a result of recent advances in the understanding of disease heterogeneity by identifying clinical phenotypes, pathophysiological endotypes, biomarkers and treatable traits. Children with the condition show a similar level of heterogeneity and paediatric obstructive sleep apnoea would also benefit from a more targeted approach to diagnosis and management. This review aims to summarise the adult literature on the phenotypes and endotypes of obstructive sleep apnoea and assess whether a similar approach may also be suitable to guide the development of new diagnostic and management approaches for paediatric obstructive sleep apnoea.
Collapse
|
35
|
Puri S, El-Chami M, Shaheen D, Ivers B, Panza GS, Badr MS, Lin HS, Mateika JH. Variations in loop gain and arousal threshold during NREM sleep are affected by time of day over a 24-hour period in participants with obstructive sleep apnea. J Appl Physiol (1985) 2020; 129:800-809. [PMID: 32790595 DOI: 10.1152/japplphysiol.00376.2020] [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: 11/22/2022] Open
Abstract
We investigated whether time of day affects loop gain (LG) and the arousal threshold (AT) during non-rapid eye movement (NREM) sleep. Eleven men with obstructive sleep apnea (apnea-hypopnea index > 5 events/h) completed a constant-routine protocol that comprised 3-h sleep sessions in the evening [10 PM (1) to 1 AM], morning (6 AM to 9 AM), afternoon (2 PM to 5 PM), and subsequent evening [10 PM (2) to 1 AM]. During each sleep session LG and the AT were measured during NREM sleep with a model-based approach. Our results showed the presence of a rhythmicity in both LG (P < 0.0001) and the AT (P < 0.001) over a 24-h period. In addition, LG and the AT were greater in the morning compared with both evening sessions [6 AM vs. 10 PM (1) vs. 10 PM (2): LG (1 cycle/min): 0.71 ± 0.23 vs. 0.60 ± 0.22 (P = 0.01) vs. 0.56 ± 0.10 (P < 0.001), AT (fraction of eupneic breathing): 1.45 ± 0.47 vs. 1.28 ± 0.36 (P = 0.02) vs. 1.20 ± 0.18 (P = 0.001)]. No difference in LG and the AT existed between the evening sessions (LG: P = 0.27; AT: P = 0.24). LG was correlated to measures of the hypocapnic ventilatory response (i.e., a measure of chemoreflex sensitivity) (r = 0.72 and P = 0.045) and the critical closing pressure (i.e., a measure of airway collapsibility) (r = 0.77 and P = 0.02) that we previously published. We conclude that time of day, independent of hallmarks of sleep apnea, affects LG and the AT during NREM sleep. These modifications may contribute to increases in breathing instability in the morning compared with other periods throughout the day/night cycle in individuals with obstructive sleep apnea. In addition, efficaciousness of treatments for obstructive sleep apnea that target LG and the AT may be modified by a rhythmicity in these variables.NEW & NOTEWORTHY Loop gain and the arousal threshold during non-rapid eye movement (NREM) sleep are greater in the morning compared with the afternoon and evening. Loop gain measures are correlated to chemoreflex sensitivity and the critical closing pressure measured during NREM sleep in the evening, morning, and afternoon. Breathing (in)stability and efficaciousness of treatments for obstructive sleep apnea may be modulated by a circadian rhythmicity in loop gain and the arousal threshold.
Collapse
Affiliation(s)
- Shipra Puri
- John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan.,Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - Mohamad El-Chami
- John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan.,Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - David Shaheen
- John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan.,Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - Blake Ivers
- John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan.,Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - Gino S Panza
- John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan.,Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - M Safwan Badr
- John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan.,Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan.,Department of Internal Medicine, Wayne State University School of Medicine, Detroit, Michigan.,Department of Biomedical Engineering, Wayne State University, Detroit, Michigan
| | - Ho-Sheng Lin
- John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan.,Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan.,Department of Otolaryngology-Head and Neck Surgery, Wayne State University School of Medicine and Karmanos Cancer Institute, Detroit, Michigan
| | - Jason H Mateika
- John D. Dingell Department of Veterans Affairs Medical Center, Detroit, Michigan.,Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan.,Department of Internal Medicine, Wayne State University School of Medicine, Detroit, Michigan
| |
Collapse
|
36
|
Khoo MCK, Hu WH, Amin R. Effects of Ventilation-Perfusion Mismatch on Severity of Obstructive Sleep Apnea: A Modeling Study. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2020; 2020:2792-2795. [PMID: 33018586 DOI: 10.1109/embc44109.2020.9175297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Plant gain quantifies the extent and rapidity with which arterial blood gases change following hypopneic or hyperpneic events. High plant gain, acting in concert with a highly collapsible upper airway and low arousal threshold, may contribute significantly towards increasing the severity of obstructive sleep apnea (OSA), even when controller gain is low. Elevated plant gain may be a manifestation of abnormal gas exchange resulting from ventilation-perfusion mismatch in the lungs. Using a mathematical model, we explore in this paper how ventilation-perfusion mismatch can affect plant gain, as well as the severity of OSA.
Collapse
|
37
|
Osman AM, Tong BK, Landry SA, Edwards BA, Joosten SA, Hamilton GS, Cori JM, Jordan AS, Stevens D, Grunstein RR, McEvoy RD, Catcheside PG, Eckert DJ. An assessment of a simple clinical technique to estimate pharyngeal collapsibility in people with obstructive sleep apnea. Sleep 2020; 43:5817777. [DOI: 10.1093/sleep/zsaa067] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 01/31/2020] [Indexed: 01/27/2023] Open
Abstract
Abstract
Study Objectives
Quantification of upper airway collapsibility in obstructive sleep apnea (OSA) could help inform targeted therapy decisions. However, current techniques are clinically impractical. The primary aim of this study was to assess if a simple, novel technique could be implemented as part of a continuous positive airway pressure (CPAP) titration study to assess pharyngeal collapsibility.
Methods
A total of 35 participants (15 female) with OSA (mean ± SD apnea–hypopnea index = 35 ± 19 events/h) were studied. Participants first completed a simple clinical intervention during a routine CPAP titration, where CPAP was transiently turned off from the therapeutic pressure for ≤5 breaths/efforts on ≥5 occasions during stable non-rapid eye movement (non-REM) sleep for quantitative assessment of airflow responses (%peak inspiratory flow [PIF] from preceding 5 breaths). Participants then underwent an overnight physiology study to determine the pharyngeal critical closing pressure (Pcrit) and repeat transient drops to zero CPAP to assess airflow response reproducibility.
Results
Mean PIF of breaths 3–5 during zero CPAP on the simple clinical intervention versus the physiology night were similar (34 ± 29% vs. 28 ± 30% on therapeutic CPAP, p = 0.2; range 0%–90% vs. 0%–95%). Pcrit was −1.0 ± 2.5 cmH2O (range −6 to 5 cmH2O). Mean PIF during zero CPAP on the simple clinical intervention and the physiology night correlated with Pcrit (r = −0.7 and −0.9, respectively, p < 0.0001). Receiver operating characteristic curve analysis indicated significant diagnostic utility for the simple intervention to predict Pcrit < −2 and < 0 cmH2O (AUC = 0.81 and 0.92), respectively.
Conclusions
A simple CPAP intervention can successfully discriminate between patients with and without mild to moderately collapsible pharyngeal airways. This scalable approach may help select individuals most likely to respond to non-CPAP therapies.
Collapse
Affiliation(s)
- Amal M Osman
- Neuroscience Research Australia (NeuRA), School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
- Adelaide Institute for Sleep Health, A Flinders Centre of Research Excellence, College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
| | - Benjamin K Tong
- Neuroscience Research Australia (NeuRA), School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Shane A Landry
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
- Sleep and Circadian Medicine Laboratory, Department of Physiology and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia
| | - Bradley A Edwards
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
- Sleep and Circadian Medicine Laboratory, Department of Physiology and School of Psychological Sciences, Monash University, Melbourne, Victoria, Australia
| | - Simon A Joosten
- Monash Lung and Sleep, Monash Health Clayton, Victoria, Australia
- School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Garun S Hamilton
- Monash Lung and Sleep, Monash Health Clayton, Victoria, Australia
- School of Clinical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Jennifer M Cori
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
| | - Amy S Jordan
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
| | - David Stevens
- Adelaide Institute for Sleep Health, A Flinders Centre of Research Excellence, College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
| | - Ronald R Grunstein
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
- Woolcock Institute of Medical Research and the University of Sydney, Glebe, NSW, Australia
| | - R Doug McEvoy
- Adelaide Institute for Sleep Health, A Flinders Centre of Research Excellence, College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
| | - Peter G Catcheside
- Adelaide Institute for Sleep Health, A Flinders Centre of Research Excellence, College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
| | - Danny J Eckert
- Neuroscience Research Australia (NeuRA), School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
- Adelaide Institute for Sleep Health, A Flinders Centre of Research Excellence, College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
- CRC for Alertness, Safety and Productivity, Melbourne, Australia
| |
Collapse
|
38
|
Siriwardhana LS, Weichard A, Nixon GM, Davey MJ, Walter LM, Edwards BA, Horne RSC. Role of ventilatory control instability in children with sleep-disordered breathing. Respirology 2020; 25:1174-1182. [PMID: 32239710 DOI: 10.1111/resp.13809] [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: 11/08/2019] [Revised: 02/13/2020] [Accepted: 03/10/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVE The contribution of non-anatomical factors, such as ventilatory control instability (i.e. LG), to the pathogenesis of obstructive SDB in children is unclear. Therefore, we aimed to identify the relationship between LG and severity of SDB, demographic, anthropometric and anatomical characteristics in a clinically representative cohort of children. METHODS Children (aged 3-18 years) with various severities of SDB (n = 110) and non-snoring controls (n = 36) were studied. Children were grouped according to their OAHI. Anthropometric and upper airway anatomical characteristics were measured. Spontaneous sighs were identified on polysomnography and LG, a measure of the sensitivity of the negative feedback loop that controls ventilation, was estimated by fitting a mathematical model of ventilatory control to the post-sigh ventilatory pattern. RESULTS There was no difference in LG between controls and any of the SDB severity groups. However, LG was significantly lower in children with larger tonsils (tonsil grade 4) compared with children with smaller tonsils (tonsil grade 1) (median LG (range): 0.25 (0.20-0.42) vs 0.32 (0.25-0.44); P = 0.009) and in children with a modified Mallampati score of class III/IV compared with class I (0.28 (0.24-0.33) vs 0.37 (0.27-0.44); P = 0.009). CONCLUSION A direct relationship was not found between the severity of paediatric SDB and LG. However, an altered ventilatory control sensitivity may contribute to SDB in a subgroup of children depending on their degree of anatomical compromise of the airway.
Collapse
Affiliation(s)
- Leon S Siriwardhana
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia.,Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Aidan Weichard
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia.,Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Gillian M Nixon
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia.,Department of Paediatrics, Monash University, Melbourne, VIC, Australia.,Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, VIC, Australia
| | - Margot J Davey
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia.,Department of Paediatrics, Monash University, Melbourne, VIC, Australia.,Melbourne Children's Sleep Centre, Monash Children's Hospital, Melbourne, VIC, Australia
| | - Lisa M Walter
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia.,Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Bradley A Edwards
- Sleep and Circadian Medicine Laboratory, Department of Physiology, Monash University, Melbourne, VIC, Australia.,School of Psychological Sciences and Turner Institute for Brain and Mental Health, Monash University, Melbourne, VIC, Australia
| | - Rosemary S C Horne
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia.,Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| |
Collapse
|
39
|
Effect of Hypopnea Scoring Criteria on Noninvasive Assessment of Loop Gain and Surgical Outcome Prediction. Ann Am Thorac Soc 2020; 17:484-491. [DOI: 10.1513/annalsats.201906-436oc] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
40
|
Kim SJ, Alnakhli WM, Alfaraj AS, Kim KA, Kim SW, Liu SYC. Multi-perspective clustering of obstructive sleep apnea towards precision therapeutic decision including craniofacial intervention. Sleep Breath 2020; 25:85-94. [PMID: 32219710 DOI: 10.1007/s11325-020-02062-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 02/18/2020] [Accepted: 03/13/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE Previous studies focusing on phenotyping obstructive sleep apnea (OSA) have outlined its heterogeneity in clinical symptoms, comorbidities, and polysomnographic features. However, the role of anatomical or pathophysiological causality including craniofacial skeletal deformity has not been studied. We aimed to identify and characterize phenotypes of OSA based on multi-perspective clustering by incorporating craniofacial risks with obesity, apnea severity, arousability, symptom, and comorbidity. METHODS A total of 421 Korean patients with OSA (apnea-hypopnea index, AHI ≥ 5; age ≥ 20 years old) were recruited. A K-means cluster analysis was performed following principal component analysis with sagittal and vertical skeletal variables (ANB and mandibular plane angle), AHI, body mass index, and Epworth sleepiness scale. Inter-cluster comparison was conducted using demographic, cephalometric, and polysomnographic variables in addition to presence of diabetes and hypertension. Risk factors contributing to OSA severity were evaluated in each cluster using multivariable regression analysis with adjustment for age and gender. RESULTS Three phenotypic clusters were identified and characterized as follows: Cluster-1 (noncraniofacial phenotype, 39%), non-obese moderate-to-severe OSA with no skeletal discrepancy representing low arousal threshold (ArTh), little sleepiness, and low comorbidity; Cluster-2 (craniofacial skeletal phenotype, 33%), non-obese moderate OSA with definite skeletal discrepancy showing low ArTh, mild sleepiness, and low comorbidity; and Cluster-3 (complicated phenotype, 28%), obese severe OSA with skeletal discrepancy exhibiting high ArTh, excessive daytime sleepiness, and high incidence of hypertension. CONCLUSIONS The three OSA phenotypes from multi-perspective clustering may provide a basis for precise therapeutic decision-making including craniofacial skeletal intervention beyond usual characterization of OSA subgroups.
Collapse
Affiliation(s)
- Su-Jung Kim
- Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, South Korea.
| | | | - Ali Saeed Alfaraj
- Department of Orthodontics, Kyung Hee University Dental Hospital, Seoul, South Korea
| | - Kyung-A Kim
- Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Sung-Wan Kim
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Stanley Yung-Chuan Liu
- Division of Sleep Surgery, Department of Otolaryngology, Stanford University school of Medicine, Stanford, CA, USA
| |
Collapse
|
41
|
Loop Gain in Heart Failure with Reduced Ejection Fraction and Periodic Breathing Is Associated with Sleep Stage and Arousals. Ann Am Thorac Soc 2019; 16:1591-1595. [DOI: 10.1513/annalsats.201903-224rl] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
42
|
Yin G, He M, Cao X, Xu J, Zhang Y, Kang D, Ye J. Five-Year Objective and Subjective Outcomes of Velopharyngeal Surgery for Patients with Obstructive Sleep Apnea. Otolaryngol Head Neck Surg 2019; 162:148-154. [PMID: 31635534 DOI: 10.1177/0194599819884889] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To assess the long-term effects of velopharyngeal surgery on objective and subjective symptoms in patients with obstructive sleep apnea (OSA). STUDY DESIGN Prospective cohort study. SETTING University medical center. SUBJECTS AND METHODS Eighty-six patients with OSA underwent velopharyngeal surgery, which consisted of revised uvulopalatopharyngoplasty with uvula preservation, with or without concomitant transpalatal advancement pharyngoplasty. The results from polysomnography and the Epworth Sleep Scale after 6 months and 5 years were compared with baseline. Baseline variables were compared between responders and nonresponders. RESULTS Sixty-three patients were successfully followed up at the end of study. The surgical success rate after 6 months and 5 years was 66.67% (42 of 63) and 60.32% (38 of 63), respectively, with no significant difference (P = .459). The apnea-hypopnea index and Epworth Sleep Scale dramatically decreased from baseline after 6 months and 5 years in responders and nonresponders (P < .001 for all). As compared with nonresponders, the responders exhibited larger tonsil size, higher nocturnal lowest oxygen desaturation, lower CT90 (percentage of time with oxygen saturation <90%), and shorter MH (vertical distance between the lower edge of the mandible and hyoid in the midsagittal plane of computed tomography). Tonsil size and CT90 showed significant predictive value for surgery success (P < .001 for both). CONCLUSION Velopharyngeal surgery was effective in improving nocturnal respiration and excessive daytime sleepiness in patients with OSA at 6-month and 5-year follow-up. Tonsil size and CT90 could be predictors for surgery responders.
Collapse
Affiliation(s)
- Guoping Yin
- Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Mu He
- Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Xin Cao
- Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Jinkun Xu
- Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Yuhuan Zhang
- Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Dan Kang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jingying Ye
- Department of Otorhinolaryngology-Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| |
Collapse
|
43
|
Edwards BA, Nava-Guerra L, Kemp JS, Carroll JL, Khoo MC, Sands SA, Terrill PI, Landry SA, Amin RS. Assessing ventilatory instability using the response to spontaneous sighs during sleep in preterm infants. Sleep 2019; 41:5077835. [PMID: 30137560 DOI: 10.1093/sleep/zsy161] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Indexed: 12/15/2022] Open
Abstract
Study Objectives Periodic breathing (PB) is common in newborns and is an obvious manifestation of ventilatory control instability. However, many infants without PB may still have important underlying ventilatory control instabilities that go unnoticed using standard clinical monitoring. Methods to detect infants with "subclinical" ventilatory control instability are therefore required. The current study aimed to assess the degree of ventilatory control instability using simple bedside recordings in preterm infants. Methods Respiratory inductance plethysmography (RIP) recordings were analyzed from ~20 minutes of quiet sleep in 20 preterm infants at 36 weeks post-menstrual age (median [range]: 36 [34-40]). The percentage time spent in PB was also calculated for each infant (%PB). Spontaneous sighs were identified and breath-by-breath measurements of (uncalibrated) ventilation were derived from RIP traces. Loop gain (LG, a measure of ventilatory control instability) was calculated by fitting a simple ventilatory control model (gain, time-constant, delay) to the post-sigh ventilatory pattern. For comparison, periodic inter-breath variability was also quantified using power spectral analysis (ventilatory oscillation magnitude index [VOMI]). Results %PB was strongly associated with LG (r2 = 0.77, p < 0.001) and moderately with the VOMI (r2 = 0.21, p = 0.047). LG (0.52 ± 0.05 vs. 0.30 ± 0.03; p = 0.0025) and the VOMI (-8.2 ± 1.1 dB vs. -11.8 ± 0.9 dB; p = 0.026) were both significantly higher in infants that displayed PB vs. those without. Conclusions LG and VOMI determined from the ventilatory responses to spontaneous sighs can provide a practical approach to assessing ventilatory control instability in preterm infants. Such simple techniques may help identify infants at particular risk for ventilatory instabilities with concomitant hypoxemia and its associated consequences.
Collapse
Affiliation(s)
- Bradley A Edwards
- Sleep and Circadian Medicine Laboratory, Department of Physiology, Monash University, Melbourne, Australia.,School of Psychological Sciences and Monash Institute of Cognitive and Clinical Neurosciences, Monash University, Melbourne, Australia.,Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Leonardo Nava-Guerra
- Department of Biomedical Engineering, University of Southern California, Los Angeles, CA
| | - James S Kemp
- Division of Allergy, Immunology and Pulmonary Medicine, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO
| | - John L Carroll
- Division of Pediatric Pulmonary and Sleep Medicine, Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Michael C Khoo
- Department of Biomedical Engineering, University of Southern California, Los Angeles, CA
| | - Scott A Sands
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Philip I Terrill
- School of Information Technology and Electrical Engineering, University of Queensland, Brisbane, Australia
| | - Shane A Landry
- Sleep and Circadian Medicine Laboratory, Department of Physiology, Monash University, Melbourne, Australia.,School of Psychological Sciences and Monash Institute of Cognitive and Clinical Neurosciences, Monash University, Melbourne, Australia
| | - Raouf S Amin
- Division of Pulmonary Medicine, Department of Pediatrics, Cincinnati Children Hospital Medical Center, Cincinnati, OH
| |
Collapse
|
44
|
Edwards BA, Redline S, Sands SA, Owens RL. More Than the Sum of the Respiratory Events: Personalized Medicine Approaches for Obstructive Sleep Apnea. Am J Respir Crit Care Med 2019; 200:691-703. [PMID: 31022356 PMCID: PMC6775874 DOI: 10.1164/rccm.201901-0014tr] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 04/22/2019] [Indexed: 11/16/2022] Open
Abstract
Traditionally, the presence and severity of obstructive sleep apnea (OSA) have been defined by the apnea-hypopnea index (AHI). Continuous positive airway pressure is generally first-line therapy despite low adherence, because it reliably reduces the AHI when used, and the response to other therapies is variable. However, there is growing appreciation that the underlying etiology (i.e., endotype) and clinical manifestation (i.e., phenotype) of OSA in an individual are not well described by the AHI. We define and review the important progress made in understanding and measuring physiological mechanisms (or endotypes) that help define subtypes of OSA and identify the potential use of genetics to further refine disease classification. This more detailed understanding of OSA pathogenesis should influence clinical treatment decisions as well as help inform research priorities and clinical study design. In short, treatments could be individualized on the basis of the underlying cause of OSA; patients could better understand which symptoms and outcomes will respond to OSA treatment and by how much; and researchers could select populations most likely to benefit from specific treatment approaches for OSA.
Collapse
Affiliation(s)
- Bradley A. Edwards
- Sleep and Circadian Medicine Laboratory, Department of Physiology, and
- School of Psychological Sciences, Turner Institute for Brain and Mental Health, Monash University, Melbourne, Victoria, Australia
- Division of Sleep and Circadian Disorders, Department of Medicine and Department of Neurology, Brigham & Women’s Hospital and Harvard Medical School, Boston, Massachusetts; and
| | - Susan Redline
- Division of Sleep and Circadian Disorders, Department of Medicine and Department of Neurology, Brigham & Women’s Hospital and Harvard Medical School, Boston, Massachusetts; and
| | - Scott A. Sands
- Division of Sleep and Circadian Disorders, Department of Medicine and Department of Neurology, Brigham & Women’s Hospital and Harvard Medical School, Boston, Massachusetts; and
| | - Robert L. Owens
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, La Jolla, California
| |
Collapse
|
45
|
Light M, Owens RL, Schmickl CN, Malhotra A. Precision Medicine for Obstructive Sleep Apnea. Sleep Med Clin 2019; 14:391-398. [DOI: 10.1016/j.jsmc.2019.05.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
46
|
Terrill PI. A review of approaches for analysing obstructive sleep apnoea‐related patterns in pulse oximetry data. Respirology 2019; 25:475-485. [DOI: 10.1111/resp.13635] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 05/28/2019] [Accepted: 06/12/2019] [Indexed: 01/09/2023]
Affiliation(s)
- Philip I. Terrill
- School of Information Technology and Electrical EngineeringThe University of Queensland Brisbane QLD Australia
| |
Collapse
|
47
|
Li Y, Ye J, Han D, Zhao D, Cao X, Orr J, Jen R, Deacon-Diaz N, Sands SA, Owens R, Malhotra A. The Effect of Upper Airway Surgery on Loop Gain in Obstructive Sleep Apnea. J Clin Sleep Med 2019; 15:907-913. [PMID: 31138381 DOI: 10.5664/jcsm.7848] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 02/18/2019] [Indexed: 12/28/2022]
Abstract
STUDY OBJECTIVES Controversy exists as to whether elevated loop gain is a cause or consequence of obstructive sleep apnea (OSA). Upper airway surgery is commonly performed in Asian patients with OSA who have failed positive airway pressure therapy and who are thought to have anatomical predisposition to OSA. We hypothesized that high loop gain would decrease following surgical treatment of OSA due to reduced sleep apnea severity. METHODS Polysomnography was performed preoperatively and postoperatively to assess OSA severity in 30 Chinese participants who underwent upper airway surgery. Loop gain was calculated using a validated clinically-applicable method by fitting a feedback control model to airflow. RESULTS Patients were followed up for a median (interquartile range) of 130 (62, 224) days after surgery. Apnea-hypopnea index (AHI) changed from 60.8 (33.7, 71.7) to 18.4 (9.9, 42.5) events/h (P < .001). Preoperative and postoperative loop gain was 0.70 (0.58, 0.80) and 0.53 (0.46, 0.63) respectively (P < .001). There was a positive association between the decrease in loop gain and the improvement of AHI (P = .025). CONCLUSIONS High loop gain was reduced by surgical treatment of OSA in our cohort. These data suggest that elevated loop gain may be acquired in OSA and may provide mechanistic insight into improvement in OSA with upper airway surgery. CLINICAL TRIAL REGISTRATION Registry: ClinicalTrials.gov, Title: The Impact of Sleep Apnea Treatment on Physiology Traits in Chinese Patients With Obstructive Sleep Apnea, Identifier: NCT02696629, URL: https://clinicaltrials.gov/show/NCT02696629.
Collapse
Affiliation(s)
- Yanru Li
- Department of Otolaryngology Head and Neck Surgery and Clinical Center for OSAHS, Beijing Tongren Hospital, Capital Medical University, Beijing, China.,Key Laboratory of Otolaryngology Head and Neck Surgery (Ministry of Education of China), Capital Medical University, Beijing, China.,Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, San Diego, California
| | - Jingying Ye
- Department of Otolaryngology Head and Neck Surgery and Clinical Center for OSAHS, Beijing Tongren Hospital, Capital Medical University, Beijing, China.,Key Laboratory of Otolaryngology Head and Neck Surgery (Ministry of Education of China), Capital Medical University, Beijing, China.,Department of Otolaryngology Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, Beijing, China
| | - Demin Han
- Department of Otolaryngology Head and Neck Surgery and Clinical Center for OSAHS, Beijing Tongren Hospital, Capital Medical University, Beijing, China.,Key Laboratory of Otolaryngology Head and Neck Surgery (Ministry of Education of China), Capital Medical University, Beijing, China
| | - Di Zhao
- Department of Otolaryngology Head and Neck Surgery and Clinical Center for OSAHS, Beijing Tongren Hospital, Capital Medical University, Beijing, China.,Key Laboratory of Otolaryngology Head and Neck Surgery (Ministry of Education of China), Capital Medical University, Beijing, China
| | - Xin Cao
- Department of Otolaryngology Head and Neck Surgery and Clinical Center for OSAHS, Beijing Tongren Hospital, Capital Medical University, Beijing, China.,Key Laboratory of Otolaryngology Head and Neck Surgery (Ministry of Education of China), Capital Medical University, Beijing, China.,Department of Otolaryngology Head and Neck Surgery, Beijing Tsinghua Changgung Hospital, Beijing, China
| | - Jeremy Orr
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, San Diego, California
| | - Rachel Jen
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, San Diego, California
| | - Naomi Deacon-Diaz
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, San Diego, California
| | - Scott A Sands
- Division of Sleep Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Robert Owens
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, San Diego, California
| | - Atul Malhotra
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego, San Diego, California
| |
Collapse
|
48
|
Thomas RJ, Chen S, Eden UT, Prerau MJ. Quantifying statistical uncertainty in metrics of sleep disordered breathing. Sleep Med 2019; 65:161-169. [PMID: 31540785 DOI: 10.1016/j.sleep.2019.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/03/2019] [Accepted: 06/05/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND The apnea-hypopnea index (AHI) (or one of its derivatives) is the primary clinical metric for characterizing sleep disordered breathing-the value of which with respect to a threshold determines severity of diagnosis and eligibility for treatment reimbursement. The index value, however, is taken as a perfect point estimate, with no measure of statistical uncertainty. Thus, current practice does not robustly account for variability in diagnosis/eligibility due to chance. In this paper, we quantify the statistical uncertainty associated with respiratory event indices for sleep disordered breathing and the effect of uncertainty on treatment eligibility. METHODS We develop an empirical estimate of uncertainty using a non-parametric bootstrap on the interevent times, as well as a theoretical Poisson estimate reflecting the current formulation of the AHI. We then apply these methods to estimate AHI uncertainty for 2049 subjects (954/1095 M/F, age: mean 69 ± 9.1) from the Multi-Ethnic Study of Atherosclerosis (MESA). RESULTS AND CONCLUSIONS The mean 95% empirical confidence interval width was 11.500 ± 6.208 events per hour and the mean 95% theoretical Poisson confidence interval width was 5.998 ± 2.897 events per hour, suggesting that uncertainty is likely a major confounding factor within the current diagnostic framework. Of the 278 subjects in the symptomatic population (ESS>10), 27% (76/278) had uncertain diagnoses given the 95% empirical confidence interval. Of the 2049 subjects in the full population, 43% (880/2049) had uncertain diagnoses given the 95% empirical confidence interval. The inclusion of subjects with uncertain diagnoses increases the number of eligible patients by 21.3% for the symptomatic population and by 84.8% for the full population. The exclusion of subjects with uncertain diagnoses given the 95% empirical confidence interval decreases the number of eligible patients by 12.4% for the symptomatic population and by 34.8% for full population. Additional analyses suggest that it is practically infeasible to gain diagnostic statistical significance through additional testing for a broad range of borderline cases. Overall, these results suggest that AHI uncertainty is a vital additional piece of information that would greatly benefit clinical practice, and that the inclusion of uncertainty in epidemiological analysis might help improve the ability for researchers to robustly link AHI with co-morbidities and long-term outcomes.
Collapse
Affiliation(s)
- Robert J Thomas
- Harvard Medical School, USA; Pulmonary, Critical Care & Sleep, Department of Medicine, Beth Israel Deaconess Medical Center, USA
| | - Shuqiang Chen
- Department of Mathematics and Statistics, Boston University, USA
| | | | - Michael J Prerau
- Harvard Medical School, USA; Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, USA; Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, USA.
| |
Collapse
|
49
|
Harman K, Weichard AJ, Davey MJ, Horne RS, Nixon GM, Edwards BA. Assessing ventilatory control stability in children with and without an elevated central apnoea index. Respirology 2019; 25:214-220. [DOI: 10.1111/resp.13606] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 04/06/2019] [Accepted: 05/01/2019] [Indexed: 01/10/2023]
Affiliation(s)
- Katherine Harman
- Department of PaediatricsMonash University Melbourne VIC Australia
- The Ritchie Centre, Hudson Institute of Medical Research Melbourne VIC Australia
- Melbourne Children's Sleep CentreMonash Children's Hospital Melbourne VIC Australia
| | - Aidan J. Weichard
- Department of PaediatricsMonash University Melbourne VIC Australia
- The Ritchie Centre, Hudson Institute of Medical Research Melbourne VIC Australia
| | - Margot J. Davey
- Department of PaediatricsMonash University Melbourne VIC Australia
- The Ritchie Centre, Hudson Institute of Medical Research Melbourne VIC Australia
- Melbourne Children's Sleep CentreMonash Children's Hospital Melbourne VIC Australia
| | - Rosemary S.C. Horne
- Department of PaediatricsMonash University Melbourne VIC Australia
- The Ritchie Centre, Hudson Institute of Medical Research Melbourne VIC Australia
| | - Gillian M. Nixon
- Department of PaediatricsMonash University Melbourne VIC Australia
- The Ritchie Centre, Hudson Institute of Medical Research Melbourne VIC Australia
- Melbourne Children's Sleep CentreMonash Children's Hospital Melbourne VIC Australia
| | - Bradley A. Edwards
- Sleep and Circadian Medicine Laboratory, Department of Physiology and School of Psychological Sciences, Faculty of Medicine, Nursing and Health SciencesMonash University Melbourne VIC Australia
- School of Psychological Sciences and Turner Institute for Brain and Mental HealthMonash University Melbourne VIC Australia
| |
Collapse
|
50
|
Alex RM, Panza GS, Hakim H, Badr MS, Edwards BA, Sands SA, Mateika JH. Exposure to mild intermittent hypoxia increases loop gain and the arousal threshold in participants with obstructive sleep apnoea. J Physiol 2019; 597:3697-3711. [DOI: 10.1113/jp277711] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 04/04/2019] [Indexed: 01/03/2023] Open
Affiliation(s)
- Raichel M. Alex
- John D. Dingell Veterans Affairs Medical Center Detroit MI 48201 USA
- Department of PhysiologyWayne State University School of Medicine Detroit MI 48201 USA
| | - Gino S. Panza
- John D. Dingell Veterans Affairs Medical Center Detroit MI 48201 USA
- Department of PhysiologyWayne State University School of Medicine Detroit MI 48201 USA
| | - Huzaifa Hakim
- John D. Dingell Veterans Affairs Medical Center Detroit MI 48201 USA
- Department of PhysiologyWayne State University School of Medicine Detroit MI 48201 USA
| | - M. Safwan Badr
- John D. Dingell Veterans Affairs Medical Center Detroit MI 48201 USA
- Department of PhysiologyWayne State University School of Medicine Detroit MI 48201 USA
- Department of Internal MedicineWayne State University School of Medicine Detroit MI 48201 USA
| | - Bradley A. Edwards
- Sleep and Circadian Medicine LaboratoryDepartment of Physiology Monash University Melbourne Australia
- School of Psychological Sciences and Monash Institute of Cognitive and Clinical NeurosciencesMonash University Melbourne Australia
| | - Scott A. Sands
- Division of Sleep and Circadian DisordersBrigham and Women's Hospital and Harvard Medical School Boston MA USA
| | - Jason H. Mateika
- John D. Dingell Veterans Affairs Medical Center Detroit MI 48201 USA
- Department of PhysiologyWayne State University School of Medicine Detroit MI 48201 USA
- Department of Internal MedicineWayne State University School of Medicine Detroit MI 48201 USA
| |
Collapse
|