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Upper airway respiratory syndrome

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https://www.readbyqxmd.com/read/28923942/identification-of-sialic-acid-binding-function-for-the-middle-east-respiratory-syndrome-coronavirus-spike-glycoprotein
#1
Wentao Li, Ruben J G Hulswit, Ivy Widjaja, V Stalin Raj, Ryan McBride, Wenjie Peng, W Widagdo, M Alejandra Tortorici, Brenda van Dieren, Yifei Lang, Jan W M van Lent, James C Paulson, Cornelis A M de Haan, Raoul J de Groot, Frank J M van Kuppeveld, Bart L Haagmans, Berend-Jan Bosch
Middle East respiratory syndrome coronavirus (MERS-CoV) targets the epithelial cells of the respiratory tract both in humans and in its natural host, the dromedary camel. Virion attachment to host cells is mediated by 20-nm-long homotrimers of spike envelope protein S. The N-terminal subunit of each S protomer, called S1, folds into four distinct domains designated S1(A) through S1(D) Binding of MERS-CoV to the cell surface entry receptor dipeptidyl peptidase 4 (DPP4) occurs via S1(B) We now demonstrate that in addition to DPP4, MERS-CoV binds to sialic acid (Sia)...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28865707/effect-of-airway-surface-liquid-on-the-forces-on-the-pharyngeal-wall-experimental-fluid-structure-interaction-study
#2
Jernej Pirnar, Brane Širok, Andrej Bombač
Obstructive sleep apnoea syndrome (OSAS) is a breathing disorder with a multifactorial etiology. The respiratory epithelium is lined with a thin layer of airway surface liquid preventing interactions between the airflow and epithelium. The effect of the liquid lining in OSAS pathogenesis remains poorly understood despite clinical research. Previous studies have shown that the physical properties of the airway surface liquid or altered stimulation of the airway mechanoreceptors could alleviate or intensify OSAS; however, these studies do not provide a clear physical interpretation...
August 24, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28863405/phantom-study-evaluating-detection-of-simulated-upper-airway-occlusion-using-piezoelectric-ultrasound-transducers
#3
Mohammad Al-Abed, Peter Antich, Donald E Watenpaugh, Khosrow Behbehani
Obstructive sleep apnea/hypopnea syndrome (OSAHS) is characterized by repetitive narrowing or full collapse of the upper airway concomitant with continued respiratory effort during sleep lasting 10s or more. OSAHS is the most prevalent form of sleep-disordered breathing, affecting more than 17% of the middle-aged U.S. POPULATION: Hence, many individuals need to be tested for having OSAHS. Currently, detection of airway occlusion due to OSAHS is achieved by indirect measurements, often requiring multiple sensor types, such as a flow transducer combined with chest and abdomen plethysmography...
August 24, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28838754/sleep-respiratory-problems-in-children-diagnosis-and-contribution-of-the-orthodontist
#4
Mathilde Galievsky, Astrid Lambert
Obstructive sleep apnea/hypopnea syndrome (OSAS) is still not widely diagnosed in children as its clinical signs are extremely variable. The diagnosis is based on recognition of the nocturnal and diurnal clinical symptoms of the syndrome, but above all on analysis of a sleep recording revealing abnormal respiratory phenomena. This recording makes it possible to determine an Apnea/Hypopnea Index (AHI) for each hour of sleep. The abnormality threshold is 1.5AHI/h for children and 5AHI/h for adults. The higher the index, the more severe the OSAS...
August 21, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28832294/-acute-flaccid-myelitis-after-a-respiratory-tract-infection-first-dutch-case-related-to-enterovirus-type-d68-infection
#5
J Helfferich, E M Kingma, L C Meiners, E H Schölvinck, H D Mulder, O F Brouwer
BACKGROUND: Acute flaccid myelitis (AFM) is a relatively rare disorder affecting the anterior horn of the spinal cord and brain stem. It is characterised by rapid progressive weakness of the limbs and respiratory muscles, often combined with cranial nerve dysfunction. This used to be seen in infections with the polio virus, but in recent years, AFM has been mainly associated with enterovirus D68 infection. CASE DESCRIPTION: A boy of nearly 4 years-old developed rapidly progressive weakness and respiratory failure after an upper airway infection...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28815092/zinc-chloride-smoke-inhalation-induced-severe-acute-respiratory-distress-syndrome-first-survival-in-the-united-states-with-extended-duration-five-weeks-therapy-with-high-dose-corticosteroids-in-combination-with-lung-protective-ventilation
#6
Hafiz Mahboob, Robert Richeson Iii, Robert McCain
Zinc chloride smoke bomb exposure is frequently seen in military drills, combat exercises, metal industry works, and disaster simulations. Smoke exposure presents with variety of pulmonary damage based on the intensity of the exposure. Smoke induced severe acute respiratory distress syndrome (ARDS) is often fatal and there are no standard treatment guidelines. We report the first survival of smoke induced severe ARDS in the United States (US) with prolonged use of high dose steroids (five weeks) and lung protective ventilation alone...
2017: Case Reports in Critical Care
https://www.readbyqxmd.com/read/28805272/clinical-phenotype-of-south-east-asian-temporomandibular-disorder-patients-with-upper-airway-resistance-syndrome
#7
David K L Tay, Kenny P Pang
OBJECTIVE: To document the clinical phenotype of temporomandibular disorder (TMD) patients with concomitant upper airway resistance syndrome (UARS) in a South East Asian population. STUDY DESIGN: A multi-center prospective series of 86 TMD patients (26 men and 60 women / mean age 35.7 years) with UARS. All had excessive daytime sleepiness, high arousal index and apnea-hypopnea index (AHI)<5 RESULTS: The mean body mass index was 20.1, mean arousal index 16.2, mean respiratory disturbance index 19...
August 14, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28716387/respiratory-virus-prior-to-hematopoietic-cell-transplantation-is-associated-with-allo-immune-mediated-lung-syndromes
#8
Birgitta Versluys, Marc Bierings, Jean Luc Murk, Tom Wolfs, Caroline Lindemans, Kors Vd Ent, Jaap Jan Boelens
BACKGROUND: Allo-immune mediated lung syndromes (allo-LS) are life-threatening complications after hematopoietic cell transplantation (HCT). Respiratory virus (RV) has been suggested to play a role in the pathogenesis. OBJECTIVE: We studied the relation between RV-DNA/RNA detection in upper/lower airway before HCT and the occurrence of allo-LS. METHODS: We retrospectively analyzed all HCT recipients between 2004 and 2014, in whom Real-Time PCR for RV was done from Nasal-Pharyngeal-Aspirates (NPA) and Broncho-Alveolar- Lavage (BAL) before HCT...
July 14, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28705229/brugada-syndrome-in-a-patient-with-amyotrophic-lateral-sclerosis-a-case-report
#9
Anusha Battineni, Rohit Gummi, Naresh Mullaguri, Raghav Govindarajan
BACKGROUND: Amyotrophic lateral sclerosis is a fatal neuromuscular disorder characterized by progressive death of the upper and lower motor neurons in the central nervous system. Patients with this disease die mostly as a result of respiratory failure; however, owing to prolonged survival through assisted ventilation, cardiovascular causes are increasingly responsible for mortality. We report what is to the best of our knowledge the first case of type 2 Brugada syndrome causing ventricular tachyarrhythmia and cardiac arrest in a patient with upper limb onset amyotrophic lateral sclerosis...
July 14, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28677827/the-overlaps-of-asthma-or-copd-with-osa-a-focused-review
#10
REVIEW
Robert L Owens, Madalina M Macrea, Mihaela Teodorescu
Asthma, chronic obstructive pulmonary disease (COPD) and obstructive sleep apnoea (OSA) are the most common respiratory disorders worldwide. Given demographic and environmental changes, prevalence for each is likely to increase. Although exact numbers are not known, based on chance alone, many people will be affected by both lower airways obstruction and concomitant upper airway obstruction during sleep. Some recent studies suggest that there is a reciprocal interaction, with chronic lung disease predisposing to OSA, and OSA worsening control and outcomes from chronic lung disease...
August 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28649564/primary-ciliary-dyskinesia-an-update-on-clinical-aspects-genetics-diagnosis-and-future-treatment-strategies
#11
REVIEW
Virginia Mirra, Claudius Werner, Francesca Santamaria
Primary ciliary dyskinesia (PCD) is an orphan disease (MIM 244400), autosomal recessive inherited, characterized by motile ciliary dysfunction. The estimated prevalence of PCD is 1:10,000 to 1:20,000 live-born children, but true prevalence could be even higher. PCD is characterized by chronic upper and lower respiratory tract disease, infertility/ectopic pregnancy, and situs anomalies, that occur in ≈50% of PCD patients (Kartagener syndrome), and these may be associated with congenital heart abnormalities...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28631914/-impact-of-cpap-therapy-on-erectile-function-during-sleep-and-testosterone-level-in-men-with-sleep-apnea-syndrome
#12
I M Madaeva, O N Berdina, N V Semenova, V V Madaev, I N Gutnik, L I Kolesnikova
The article presents the results of a polysomnographic study with simultaneous monitoring spontaneous nocturnal erections - Nocturnal Penile Tumescences (NPT) in 69 men with age-related androgen deficiency (AAD). Of these, 45 patients were diagnosed with obstructive sleep apnea syndrome (OSAS). In 34 of the 45 patients with OSAS, regimens of non-invasive ventilation with positive-positive airway pressure (CPAP) were selected. Titration was carried out using automatic CPAP-devices for 2 months. The control group (n=24) comprised men with AAD, matched by the "copy-pair" type without clinical manifestations of respiratory disturbances during sleep...
June 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28572979/complex-effects-of-high-flow-nasal-cannula-therapy-on-hemodynamics-in-the-pediatric-patient-after-cardiac-surgery
#13
EDITORIAL
Yu Inata, Muneyuki Takeuchi
BACKGROUND: The high-flow nasal cannula (HFNC) system has been widely used for children in various clinical settings. However, the physiological and clinical impact of HFNC therapy on the pediatric patient with respiratory distress after cardiac surgery has not been thoroughly investigated. MAIN BODY OF THE ABSTRACT: It seems logical to use HFNC as a primary therapy for post-extubation respiratory failure after congenital heart surgery, in which low cardiac output syndrome and upper airway obstruction are commonly encountered; the HFNC therapy alleviates the work of breathing and large negative swings of intrathoracic pressure, which in turn helps to decrease the systemic ventricular afterload...
2017: Journal of Intensive Care
https://www.readbyqxmd.com/read/28544488/obstructive-sleep-apnea-in-down-syndrome-benefits-of-surgery-and-noninvasive-respiratory-support
#14
Benjamin Dudoignon, Alessandro Amaddeo, Annick Frapin, Briac Thierry, Livio de Sanctis, Jorge Olmo Arroyo, Sonia Khirani, Brigitte Fauroux
Children with Down syndrome are at increased risk of obstructive sleep apnea (OSA). The aim of the study was to describe the management of OSA in a large cohort of children with Down syndrome. A retrospective analysis of sleep studies and consequent management was performed for all consecutive Down syndrome patients evaluated between September 2013 and April 2016. The data of 57 patients were analyzed: 51/53 had an interpretable overnight polygraphy and 4 the recording of nocturnal gas exchange. Mean age at baseline sleep study was 6...
May 24, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28543983/mutation-of-serine-threonine-protein-kinase-36-stk36-causes-primary-ciliary-dyskinesia-with-a-central-pair-defect
#15
Christine Edelbusch, Sandra Cindrić, Gerard W Dougherty, Niki T Loges, Heike Olbrich, Joseph Rivlin, Julia Wallmeier, Petra Pennekamp, Israel Amirav, Heymut Omran
Primary ciliary dyskinesia (PCD) is a genetic condition of impaired ciliary beating, characterized by chronic infections of the upper and lower airways and progressive lung failure. Defects of the outer dynein arms are the most common cause of PCD. In about half of the affected individuals, PCD occurs with situs inversus (Kartagener syndrome). A minor PCD subgroup including defects of the radial spokes (RS) and central pair (CP) is hallmarked by the absence of laterality defects, subtle beating abnormalities, and unequivocally apparent ultrastructural defects of the ciliary axoneme, making their diagnosis challenging...
August 2017: Human Mutation
https://www.readbyqxmd.com/read/28538064/temporomandibular-joint-ankylosis-after-early-mandibular-distraction-osteogenesis-a-new-syndrome
#16
Manlio Galié, Valentina Candotto, Giovanni Elia, Luigi C Clauser
Distraction osteogenesis (DO) has been one of the most innovative concepts in cranio-maxillofacial syndromology and surgery over the last 25 years.Early mandibular distraction in severe micrognathia has recently been recognized as an effective treatment option to safely relieve upper airway obstruction associated with mandibular deficiency.An increased incidence in temporomandibular joint complications during DO in neonates has recently been reported, especially in syndromic patients.The authors report 2 children affected by severe micrognathia and severe respiratory distress at birth...
May 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28523136/phenotypic-presentation-of-chronic-cough-in-children
#17
EDITORIAL
Ahmad Kantar
Chronic cough in children is increasingly defined as a cough that lasts more than four weeks. It is recognized as a different entity than cough in adults. As a result, the diagnostic approach and management of chronic cough in children are no longer extrapolated from adult guidelines. These differences are attributed to the various characteristics of the respiratory tract, immunological system and nervous system in children. Specific paediatric guidelines and algorithms for chronic cough are now widely applied...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28482650/obesity-and-perioperative-noninvasive-ventilation-in-bariatric-surgery
#18
Michele Carron, Francesco Zarantonello, Giovanna Ieppariello, Carlo Ori
The incidence and prevalence of obesity continues to increase globally. Physicians will therefore provide care for an increasing number of obese patients in their clinical practice. Optimal management of these patients is required to minimize the risk of perioperative complications that increase morbidity and mortality. Obesity affects the respiratory function. It is generally associated with reduced lung volume with increased atelectasis, decreased lung and chest wall compliance, increased airway resistance, and moderate to severe hypoxemia...
June 2017: Minerva Chirurgica
https://www.readbyqxmd.com/read/28466096/pathogenic-human-coronavirus-infections-causes-and-consequences-of-cytokine-storm-and-immunopathology
#19
REVIEW
Rudragouda Channappanavar, Stanley Perlman
Human coronaviruses (hCoVs) can be divided into low pathogenic and highly pathogenic coronaviruses. The low pathogenic CoVs infect the upper respiratory tract and cause mild, cold-like respiratory illness. In contrast, highly pathogenic hCoVs such as severe acute respiratory syndrome CoV (SARS-CoV) and Middle East respiratory syndrome CoV (MERS-CoV) predominantly infect lower airways and cause fatal pneumonia. Severe pneumonia caused by pathogenic hCoVs is often associated with rapid virus replication, massive inflammatory cell infiltration and elevated pro-inflammatory cytokine/chemokine responses resulting in acute lung injury (ALI), and acute respiratory distress syndrome (ARDS)...
May 2, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/28328824/early-use-of-noninvasive-techniques-for-clearing-respiratory-secretions-during-noninvasive-positive-pressure-ventilation-in-patients-with-acute-exacerbation-of-chronic-obstructive-pulmonary-disease-and-hypercapnic-encephalopathy-a-prospective-cohort-study
#20
Jinrong Wang, Zhaobo Cui, Shuhong Liu, Xiuling Gao, Pan Gao, Yi Shi, Shufen Guo, Peipei Li
Noninvasive positive-pressure ventilation (NPPV) might be superior to conventional mechanical ventilation (CMV) in patients with acute exacerbations of chronic obstructive pulmonary disease (AECOPDs). Inefficient clearance of respiratory secretions provokes NPPV failure in patients with hypercapnic encephalopathy (HE). This study compared CMV and NPPV combined with a noninvasive strategy for clearing secretions in HE and AECOPD patients.The present study is a prospective cohort study of AECOPD and HE patients enrolled between October 2013 and August 2015 in a critical care unit of a major university teaching hospital in China...
March 2017: Medicine (Baltimore)
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