keyword
MENU ▼
Read by QxMD icon Read
search

Pathophysiology of obstructive sleep apnea

keyword
https://www.readbyqxmd.com/read/28818154/physiology-based-modeling-may-predict-surgical-treatment-outcome-for-obstructive-sleep-apnea
#1
Yanru Li, Jingying Ye, Demin Han, Xin Cao, Xiu Ding, Yuhuan Zhang, Wen Xu, Jeremy Orr, Rachel Jen, Scott Sands, Atul Malhotra, Robert Owens
STUDY OBJECTIVES: To test whether the integration of both anatomical and nonanatomical parameters (ventilatory control, arousal threshold, muscle responsiveness) in a physiology-based model will improve the ability to predict outcomes after upper airway surgery for obstructive sleep apnea (OSA). METHODS: In 31 patients who underwent upper airway surgery for OSA, loop gain and arousal threshold were calculated from preoperative polysomnography (PSG). Three models were compared: (1) a multiple regression based on an extensive list of PSG parameters alone; (2) a multivariate regression using PSG parameters plus PSG-derived estimates of loop gain, arousal threshold, and other trait surrogates; (3) a physiological model incorporating selected variables as surrogates of anatomical and nonanatomical traits important for OSA pathogenesis...
August 14, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28796527/role-of-leptin-in-obstructive-sleep-apnea
#2
Ikuyo Imayama, Bharati Prasad
Leptin is a peptide hormone mainly produced in white adipose tissue. It is known to regulate energy homeostasis, inflammation, metabolism, and sympathetic nerve activity. Increasing evidence suggests it has a role in ventilatory function and upper airway obstruction. Leptin levels correlate positively with measurements of adiposity and can potentially provide important insights into the pathophysiology of diseases associated with obesity. Obesity is a strong risk factor for obstructive sleep apnea, a disease characterized by periodic upper airway occlusion during sleep...
August 10, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28777180/sleep-wake-disorders-of-childhood
#3
Suresh Kotagal
PURPOSE OF REVIEW: Sleep-wake disorders occur in 10% to 28% of children and differ somewhat in pathophysiology and management from sleep-wake disorders in adults. This article discusses the diagnosis and management of key childhood sleep disorders. RECENT FINDINGS: The role of sleep in memory consolidation and in the facilitation of learning has been increasingly recognized, even at the toddler stage. Cataplexy, a key feature of narcolepsy type 1, may be subtle in childhood and characterized by transient muscle weakness isolated to the face...
August 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28774636/sleep-as-a-new-target-for-improving-outcomes-in-idiopathic-pulmonary-fibrosis-ipf
#4
REVIEW
Charalampos Mermigkis, Izolde Bouloukaki, Sophia E Schiza
Idiopathic pulmonary fibrosis (IPF) represents the most common type of interstitial pneumonias but remains a disease with a poor outcome. In recent years, two drugs (pirfenidone and nintedanib) have shown promising results at stalling disease progression, however, the interplay of sleep disruption or sleep disorders overall and in relation to medication effectiveness remains understudied. In the past, there was limited interest related to the role of sleep in IPF. Treating physicians tended to point only on the daily disabling symptoms disregarding the possible significant role of sleep alterations or co-existing sleep disorders...
July 31, 2017: Chest
https://www.readbyqxmd.com/read/28767909/association-of-subclinical-inflammation-glycated-hemoglobin-and-risk-for-obstructive-sleep-apnea-syndrome
#5
Carolina Vicaria Rodrigues D'Aurea, Bruno Gion de Andrade Cerazi, Antonio Gabriele Laurinavicius, Carolina Castro Porto Silva Janovsky, Raquel Dilguerian de Oliveira Conceição, Raul D Santos, Márcio Sommer Bittencourt
Objective: To investigate the inter-relation between high sensitivity C-reactive protein and glycated hemoglobin in prediction of risk of obstructive sleep apnea. Methods: We included all individuals participating in a check-up program at the Preventive Medicine Center of Hospital Israelita Albert Einstein in 2014. The Berlin questionnaire for risk of obstructive sleep apnea was used, and the high sensitivity C-reactive protein and glycated hemoglobin levels were evaluated...
April 2017: Einstein
https://www.readbyqxmd.com/read/28738382/advanced-concepts-in-the-pathophysiology-of-obstructive-sleep-apnea
#6
David P White
The primary pathological event in the disorder obstructive sleep apnea (OSA) is the partial or complete closure of the pharyngeal airway during sleep in an individual with a widely patent airway during wakefulness. This yields an apnea or hypopnea with resulting hypoxia and hypercapnia, and most often requires an arousal to terminate the event. These events occur in a repetitive manner during sleep, yielding intermittent hypoxia and sleep fragmentation with their associated adverse effects on the health and quality of life of the afflicted individual...
2017: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28697968/update-on-pathophysiology-and-treatment-of-childhood-obstructive-sleep-apnea-syndrome
#7
REVIEW
Justin C Brockbank
Obstructive sleep apnea syndrome (OSAS) is common in childhood and is characterized by recurrent upper airway obstructive events during sleep that produce significant neurocognitive and cardiovascular sequelae. The pathophysiology of childhood OSAS is complex and involves mechanical airway obstruction often secondary to adenotonsillar hypertrophy. However, neuromotor abnormalities and instability of central ventilatory control are also implicated. Several surgical and non-surgical treatment options for childhood OSAS are available, and will be discussed...
June 12, 2017: Paediatric Respiratory Reviews
https://www.readbyqxmd.com/read/28670393/chronic-intermittent-hypoxia-decreases-pulmonary-clearance-of-99m-tc-labelled-particulate-matter-in-mice
#8
Cuiping Fu, Huan Lu, Xu Wu, Jie Liu, Chengying Liu, Zilong Liu, Wei Yuan, Jian Zhou, Shanqun Li
BACKGROUND: Obstructive sleep apnea-hypopnea syndrome (OSAHS) could cause systematic inflammation including pulmonary inflammatory response, whereas the influence of OSAHS in pulmonary clearance ability remains unknown. The main pathophysiological feature of OSAHS is chronic intermittent hypoxia (CIH). The goal of this study is to clarify the airway clearance of particulate matter (PM) in CIH mice, and to explore the potential mechanism. METHODS: Balb/c mice were divided into a CIH group and a control group, exposed to intermittent hypoxia and air chamber, respectively...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28667353/the-use-of-handheld-nasal-spirometry-to-predict-the-presence-of-obstructive-sleep-apnea
#9
Judd H Fastenberg, Christina H Fang, Viraj M Patel, Juan Lin, Howard D Stupak
OBJECTIVE: Nasal obstruction and oral breathing may play an important role in the pathophysiology of obstructive sleep apnea (OSA). This study aims to better understand the link between oral breathing, nasal obstruction, and the spectrum of sleep-disordered breathing. STUDY DESIGN: Prospective study. METHODS AND MATERIALS: Prospective study of patients who presented to the Otolaryngology clinic and underwent polysomnogram (PSG) from 2015 to 2016...
June 30, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28647595/intermittent-hypoxia-caused-cognitive-dysfunction-relate-to-mirnas-dysregulation-in-hippocampus
#10
Huabin Gao, Zhaoli Han, Shan Huang, Ruojing Bai, Xintong Ge, Fanglian Chen, Ping Lei
Intermittent hypoxia (IH) is a characteristic pathophysiological change of obstructive sleep apnea (OSA), a commonly diagnosed chronic sleep disorder. With the process of OSA, patients will suffer from the nervous system damage and appear to multiple cognitive dysfunction. The mechanism that how IH causes cognitive impairment is still unknown. Both control and experimental rats were placed in conditions absence and presence of intermittent hypoxia (IH) for 8h a day for a week, two weeks and four weeks, and then followed by behavioral assessments with Morris Water Maze (MWM) test...
June 21, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28637196/chronological-change-of-right-ventricle-by-chronic-intermittent-hypoxia-in-mice
#11
Hyung-Ju Cho, Woon Heo, Jung Woo Han, Yong Hyuk Lee, Jin Myung Park, Min Jung Kang, Joo-Heon Yoon, Min Goo Lee, Chang-Hoon Kim, Joo Young Kim
Study Objective: No studies have investigated sequential changes in the heart on magnetic resonance imaging (MRI), along with observation of functional lung phenotypes and genetics, over the duration of chronic intermittent hypoxia (CIH). We investigated chronological changes in heart and lung phenotypes after CIH using a mouse model to provide new insights into the pathophysiology of sleep apnea-induced cardiovascular disease. Methods: C57BL/6J adult male mice were randomized to 4 or 8 weeks of CIH...
August 1, 2017: Sleep
https://www.readbyqxmd.com/read/28635907/-the-problem-of-obstructive-sleep-apnea-syndrome-in-asthmatic-patients
#12
E G Sheludko, D E Naumov, Yu M Perelman, V P Kolosov
Asthma and obstructive sleep apnea syndrome (OSAS) are one of the most common chronic respiratory diseases. These have common risk factors that include obesity, gastroesophageal reflux disease (GERD) and impaired nasal breathing (allergic rhinitis, sinusitis). At the same time, experimental evidence demonstrates common pathophysiological mechanisms of these diseases, such as involvement in the process of the respiratory tract, a systemic inflammatory response, and implementation of neuromechanical reflexes...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28620058/intermittent-hypercapnic-hypoxia-during-sleep-does-not-induce-ventilatory-long-term-facilitation-in-healthy-males
#13
Naomi Louise Deacon, Doug R McEvoy, Daniel L Stadler, Peter G Catcheside
Intermittent hypoxia induced ventilatory neuroplasticity is likely important in obstructive sleep apnea pathophysiology. Although concomitant CO2 levels and arousal state critically influence neuroplastic effects of intermittent hypoxia, no studies have investigated intermittent hypercapnic hypoxia effects during sleep in humans. Thus, the purpose of this study was to investigate if intermittent hypercapnic hypoxia during sleep induces neuroplasticity (ventilatory long-term facilitation and increased chemoreflex responsiveness) in humans...
June 15, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28599952/risk-of-developing-obstructive-sleep-apnea-among-women-with-polycystic-ovarian-syndrome-a-nationwide-longitudinal-follow-up-study
#14
Ting-Yang Lin, Pei-Yin Lin, Tung-Ping Su, Cheng-Ta Li, Wei-Chen Lin, Wen-Hang Chang, Tzeng-Ji Chen, Ya-Mei Bai, Mu-Hong Chen
BACKGROUND: Previous cross-sectional studies have suggested a comorbid relationship between polycystic ovarian syndrome (PCOS) and obstructive sleep apnea (OSA). However, the temporal association between these two distinct diseases has not yet been investigated. METHODS: Using the Taiwan National Health Insurance Research Database, 4595 women with PCOS and 4595 (1:1) age-/sex-matched controls were enrolled into the present study between 1998 and 2009, and followed to the end of 2011...
March 10, 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28571821/rhinitis-and-sleep-disorders-the-trigeminocardiac-reflex-link
#15
Barkha Bindu, Gyaninder Pal Singh, Tumul Chowdhury, Bernhard Schaller
Rhinitis, allergic or non-allergic, is an inflammatory condition of the nose. It is associated with a wide range of sleep disorders that are generally attributed to nasal congestion and presence of inflammatory mediators like cytokines and interleukins. However, the pathophysiological mechanisms behind these sleep disorders remain unclear. On the other hand, the trigeminocardiac reflex (TCR) has recently been linked to various sleep disorders like obstructive sleep apnea, sleep bruxism and rapid eye movement (REM) sleep apnea...
June 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28555408/bariatric-surgery-induced-resolution-of-hypertension-and-obstructive-sleep-apnea-impact-of-modulation-of-body-fat-ectopic-fat-autonomic-nervous-activity-inflammatory-and-adipokine-profiles
#16
Audrey Auclair, Laurent Biertho, Simon Marceau, Frédéric-Simon Hould, Simon Biron, Stéfane Lebel, François Julien, Odette Lescelleur, Yves Lacasse, Marie-Eve Piché, Katherine Cianflone, Sebastian Demian Parlee, Kerry Goralski, Julie Martin, Marjorie Bastien, David H St-Pierre, Paul Poirier
BACKGROUND: Obesity-associated systemic hypertension (HTN) and obstructive sleep apnea (OSA) have multiple pathophysiological pathways including ectopic fat deposition, inflammation, altered adipokine profile, and increased sympathetic nervous activity. We characterized these potential mechanisms in severely obese patients with or without HTN and OSA. We also compared changes of these mechanisms at 12 months following biliopancreatic diversion with duodenal switch (BPD-DS) surgery according to HTN and OSA resolution...
May 29, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28522758/regulation-of-erythropoiesis-after-normoxic-return-from-chronic-sustained-and-intermittent-hypoxia
#17
Jihyun Song, Krishna Sundar, Radhika Gangaraju, Josef T Prchal
Hypoxia increases erythropoiesis mediated by hypoxia-inducible transcription factors (HIF) which regulate erythropoietin (EPO) transcription. Neocytolysis is a physiological mechanism that corrects polycythemia from chronic sustained hypoxemia (CSH) by transient, preferential destruction of young RBCs after normoxia is restored. We showed that neocytolysis is caused by excessive mitochondrial-derived reactive oxygen species (ROS) in reticulocytes mediated by down-regulation of HIF-controlled BNIP3L regulated mitophagy and a decrease in RBC antioxidant catalase (CAT) in hypoxia-produced erythrocytes...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28489776/is-c-reactive-protein-a-marker-of-obstructive-sleep-apnea-a-meta-analysis
#18
REVIEW
Kun Li, Peng Wei, Yanwen Qin, Yongxiang Wei
BACKGROUND: Obstructive sleep apnea (OSA) is a common disease, distinguished by recurrent episodes of upper airway obstruction during sleep, with an inflammatory component. C-reactive protein (CRP) and high-sensitivity C-reactive protein (hs-CRP) are markers of systemic inflammation and may serve as biomarkers of OSA. METHODS: Scientific studies published from January 1, 2006, to January 1, 2016 were obtained via searches of PubMed, Embase, SCI, and China National Knowledge Internet (CNKI) using relevant terms...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28474128/-chronic-hypoxia-and-cardiovascular-risk-clinical-significance-of-different-forms-of-hypoxia
#19
REVIEW
U Koehler, O Hildebrandt, J Krönig, W Grimm, J Otto, W Hildebrandt, R Kinscherf
It is of fundamental importance to differentiate whether chronic hypoxia occurs intermittently or persistently. While chronic intermittent hypoxia (CIH) is found typically in patients with obstructive sleep apnea (OAS), chronic persistent hypoxia (CPH) is typically diagnosed in patients with chronic lung disease. Cardiovascular risk is markedly increased in patients with CIH compared to patients with CPH. The frequent change between oxygen desaturation and reoxygenation in patients with CIH is associated with increased hypoxic stress, increased systemic inflammation, and enhanced adrenergic activation followed by endothelial dysfunction and increased arteriosclerosis...
May 4, 2017: Herz
https://www.readbyqxmd.com/read/28465478/chronic-obstructive-sleep-apnea-promotes-aortic-remodeling-in-canines-through-mir-145-smad3-signaling-pathway
#20
Chengyuan Yu, Yang Liu, Li Sun, Dingyu Wang, Yike Wang, Shiqi Zhao, Hui Dai, Jing Zhao, Song Zhang, Minghui Li, Yu Han, Shuang Lu, Xinwen Dong, Guangzhong Liu, Shengzhu Yu, Yue Li
Obstructive sleep apnea (OSA) is a causal pathogenetic factor of many cardiovascular diseases, however, its role in aortic diseases remains unknown. Therefore, this study was performed to explore the potential effects and pathophysiological mechanisms of chronic OSA on aortic remodeling in a canine model. After chronic OSA, the morphological changes of ascending aorta were characterized by thinner cells with pycnotic nuclei and swollen mitochondria, and obvious hyperplasia of collagenous fiber in the matrix...
June 6, 2017: Oncotarget
keyword
keyword
120616
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"