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https://www.readbyqxmd.com/read/29158671/correlation-and-compatibility-between-surface-respiratory-electromyography-and-transesophageal-diaphragmatic-electromyography-measurements-during-treadmill-exercise-in-stable-patients-with-copd
#1
Weiliang Wu, Lili Guan, Xiaoying Li, Lin Lin, Bingpeng Guo, Yuqiong Yang, Zhenyu Liang, Fengyan Wang, Luqian Zhou, Rongchang Chen
Purpose: To evaluate the compatibility and correlation between noninvasive surface respiratory electromyography and invasive transesophageal diaphragmatic electromyography measurements as facilitating indicators of neural respiratory drive (NRD) evaluation during treadmill exercise. Patients and methods: Transesophageal diaphragmatic electromyogram activity (EMGdi,es) and surface inspiratory electromyogram (EMG) activity, including surface diaphragmatic EMG activity (EMGdi,sur), surface parasternal intercostal muscle EMG activity (EMGpara), and surface sternocleidomastoid EMG activity (EMGsc), were detected simultaneously during increasing exercise capacity in 20 stable patients with COPD...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29155335/exercise-testing-in-patients-with-diaphragm-paresis
#2
Tristan Bonnevie, Francis-Edouard Gravier, Agathe Ducrocq, David Debeaumont, Catherine Viacroze, Antoine Cuvelier, Jean-François Muir, Catherine Tardif
PURPOSE: Diaphragm paresis (DP) is characterized by abnormalities of respiratory muscle function. However, the impact of DP on exercise capacity is not well known. This study was performed to assess exercise tolerance in patients with DP and to determine whether inspiratory muscle function was related to exercise capacity, ventilatory pattern and cardiovascular function during exercise. METHODS: This retrospective study included patients with DP who underwent both diaphragmatic force measurements, and cardiopulmonary exercise testing (CPET)...
November 16, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29155334/respiratory-muscle-strength-is-decreased-after-maximal-incremental-exercise-in-trained-runners-and-cyclists
#3
Ferid Oueslati, Ahmed Berriri, Jan Boone, Said Ahmaidi
The respiratory muscle fatigue seems to be able to limit exercise performance and may influence the determination of maximal oxygen uptake (V̇O2max) or maximum aerobic work rate during maximal incremental test. The aim of this study was therefore to investigate whether maximal incremental exercise decreases respiratory muscle strength. We hypothesized that respiratory muscle strength (maximal pressure) will decrease after maximal incremental exercise to exhaustion. 36 runners and 23 cyclists completed a maximal incremental test on a treadmill or a cycle ergometer with continuous monitoring of expired gases...
November 18, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29147664/reduced-inspiratory-muscle-strength-in-patients-with-type-2-diabetes-mellitus-and-obstructive-sleep-apnoea
#4
Thomas Rehling, Anne Margareta Banghøj, Marie Hvelplund Kristiansen, Lise Tarnow, Stig Molsted
Background: Obstructive sleep apnoea (OSA) is related to type 2 diabetes (T2DM), and it may be associated with reduced inspiratory muscle strength (IMS). The aim of this study was to investigate the IMS in patients with T2DM, with or without OSA. Methods: Patients with T2DM with OSA (n = 33) and without OSA (n = 28) were included. The maximum IMS was tested using the POWERbreathe KH2 device. Reference IMS values were data calculated using an algorithm based on general populations and adjusted for age and gender...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/29133824/comparison-and-evaluation-of-two-different-methods-to-establish-the-cigarette-smoke-exposure-mouse-model-of-copd
#5
Jiaze Shu, Defu Li, Haiping Ouyang, Junyi Huang, Zhen Long, Zhihao Liang, Yuqin Chen, Yiguan Chen, Qiuyu Zheng, Meidan Kuang, Haiyang Tang, Jian Wang, Wenju Lu
Animal model of cigarette smoke (CS) -induced chronic obstructive pulmonary disease (COPD) is the primary testing methodology for drug therapies and studies on pathogenic mechanisms of disease. However, researchers have rarely run simultaneous or side-by-side tests of whole-body and nose-only CS exposure in building their mouse models of COPD. We compared and evaluated these two different methods of CS exposure, plus airway Lipopolysaccharides (LPS) inhalation, in building our COPD mouse model. Compared with the control group, CS exposed mice showed significant increased inspiratory resistance, functional residual capacity, right ventricular hypertrophy index, and total cell count in BALF...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29128525/respiratory-rehabilitation-in-multiple-sclerosis-a-narrative-review-of-rehabilitation-techniques
#6
REVIEW
J Levy, H Prigent, D Bensmail
BACKGROUND: Respiratory disorders in multiple sclerosis (MS) are an important issue. They can occur early during the course of the disease, are associated with the neurological impairment, and can lead to pneumonia and respiratory failure, which are the main causes of death in advanced MS. Prevailing impaired expiratory muscles and cough abilities has been demonstrated in this population and might constitute a specific target for rehabilitation interventions. However, international guidelines lack recommendations regarding respiratory rehabilitation in MS...
November 8, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29126611/diaphragmatic-thickness-ratio-inspiratory-expiratory-as-a-diagnostic-method-of-diaphragmatic-palsy-associated-with-interescalene-block
#7
V M López Escárraga, K Dubos España, R H Castillo Bustos, L Peidró, S Sastre, X Sala-Blanch
INTRODUCTION: Diaphragmatic paralysis is a side-effect associated with interscalene block. Thickness index of the diaphragm muscle (inspiratory thickness/expiratory thickness) obtained by ultrasound has recently been introduced in clinical practice for diagnosis of diaphragm muscle atrophy. Our objective was to evaluate this index for the diagnosis of acute phrenic paresis associated with interscalene block. PATIENTS AND METHODS: We designed an observational study in 22 patients scheduled for shoulder arthroscopy...
November 7, 2017: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/29124630/effectiveness-of-inspiratory-muscle-training-on-sleep-and-functional-capacity-to-exercise-in-obstructive-sleep-apnea-a-randomized-controlled-trial
#8
Adília Karoline Ferreira Souza, Armèle Dornelas de Andrade, Ana Irene Carlos de Medeiros, Maria Inês Remígio de Aguiar, Taciano Dias de Souza Rocha, Rodrigo Pinto Pedrosa, Anna Myrna Jaguaribe de Lima
PURPOSE: The aim of this study was to evaluate the effectiveness of inspiratory muscle training (IMT) on sleep and functional capacity to exercise in subjects with obstructive sleep apnea (OSA). METHODS: This is a controlled, randomized, double-blind study conducted in 16 OSA patients divided into two groups: training (IMT: n = 8) and placebo-IMT (P-IMT: n = 8). IMT was conducted during 12 weeks with a moderate load (50-60% of maximal inspiratory pressure-MIP), while P-IMT used a load < 20% of MPI...
November 9, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29117951/long-term-benefit-of-enzyme-replacement-therapy-in-pompe-disease-a-5-year-prospective-study
#9
Esther Kuperus, Michelle E Kruijshaar, Stephan C A Wens, Juna M de Vries, Marein M Favejee, Jan C van der Meijden, Dimitris Rizopoulos, Esther Brusse, Pieter A van Doorn, Ans T van der Ploeg, Nadine A M E van der Beek
OBJECTIVE: To determine the effect of enzyme replacement therapy (ERT) after 5 years and to identify predictors for a favorable response because few data are available on the long-term efficacy of ERT in Pompe disease. METHODS: We included 102 adult patients with Pompe disease in a nationwide, prospective cohort study. We assessed muscle strength (manual muscle testing with Medical Research Council [MRC] grading, handheld dynamometry [HHD]), muscle function (6-minute walk test, Quick Motor Function Test), daily life activities (Rasch-Built Pompe-Specific Activity [R-PAct] Scale), and pulmonary function (forced vital capacity [FVC] in upright and supine positions, maximum inspiratory and expiratory pressures) at 3- to 6-month intervals before and after the start of ERT...
November 8, 2017: Neurology
https://www.readbyqxmd.com/read/29109401/smad3-initiates-oxidative-stress-and-proteolysis-that-underlies-diaphragm-dysfunction-during-mechanical-ventilation
#10
Huibin Tang, Catherine L Kennedy, Myung Lee, Yang Gao, Hui Xia, Francesca Olguin, Danielle A Fraga, Kelsey Ayers, Sehoon Choi, Michael Kim, Amir Tehrani, Yasser A Sowb, Thomas A Rando, Joseph B Shrager
Prolonged use of mechanical ventilation (MV) leads to atrophy and dysfunction of the major inspiratory muscle, the diaphragm, contributing to ventilator dependence. Numerous studies have shown that proteolysis and oxidative stress are among the major effectors of ventilator-induced diaphragm muscle dysfunction (VIDD), but the upstream initiator(s) of this process remain to be elucidated. We report here that periodic diaphragm contraction via phrenic nerve stimulation (PNS) substantially reduces MV-induced proteolytic activity and oxidative stress in the diaphragm...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29107737/respiratory-functional-and-motor-control-deficits-in-children-with-spinal-cord-injury
#11
Goutam Singh, Andrea L Behrman, Sevda C Aslan, Shelley Trimble, Alexander V Ovechkin
Children with spinal cord injury (SCI) are at high risk for developing complications due to respiratory motor control deficits. However, underlying mechanisms of these abnormalities with respect to age, development, and injury characteristics are unclear. To evaluate the effect of SCI and age on respiratory motor control in children with SCI, we compared pulmonary function and respiratory motor control outcome measures in healthy typically developing (TD) children to age-matched children with chronic SCI. We hypothesized that the deficits in respiratory functional performance in children with SCI are due to the abnormal and age-dependent respiratory muscle activation patterns...
January 2018: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29105056/specific-anesthesia-induced-lung-volume-changes-from-induction-to-emergence-a-pilot-study
#12
P Kostic, A LoMauro, A Larsson, G Hedenstierna, P Frykholm, A Aliverti
BACKGROUND: Studies aimed at maintaining intraoperative lung volume to reduce post-operative pulmonary complications have been inconclusive because they mixed up the effect of general anesthesia and the surgical procedure. Our aims were to study: (1) lung volume during the entire course of anesthesia without the confounding effects of surgical procedures; (2) the combination of three interventions to maintain lung volume; and (3) the emergence phase with focus on the restored activation of the respiratory muscles...
November 3, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29095316/genome-wide-association-study-for-genetic-variants-related-with-maximal-voluntary-ventilation-reveals-two-novel-genomic-signals-associated-with-lung-function
#13
Yujin Suh, Chaeyoung Lee
Genome-wide association studies (GWAS) for spirometry parameters have been limited to forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1), and their ratio. This study examined to identify genetic variants associated with maximal voluntary ventilation (MVV), an important spirometry parameter presenting inspiratory muscle strength.A total of 8842 Korean subjects participated in the Korean Association REsource Consortium were used to identify nucleotide variants associated with MVV and other spirometry parameters through a GWAS...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29093790/perioperative-evaluation-of-respiratory-muscle-strength-after-scoliosis-correction-in-patients-with-duchenne-muscular-dystrophy
#14
Wataru Saito, Kosuke Mizuno, Gen Inoue, Takayuki Imura, Toshiyuki Nakazawa, Masayuki Miyagi, Eiki Shirasawa, Kentaro Uchida, Masashi Takaso
Study Design: Retrospective cohort study. Purpose: To investigate the effect of spinal correction on respiratory muscle strength in patients with Duchenne muscular dystrophy (DMD). Overview of Literature: Several studies have reported that scoliosis correction in patients with DMD does not improve pulmonary function. In these studies, pulmonary function was evaluated using the traditional spirometric values of percent vital capacity (%VC) and percent forced vital capacity (%FVC)...
October 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/29077984/neurally-adjusted-ventilatory-assist-compared-to-other-forms-of-triggered-ventilation-for-neonatal-respiratory-support
#15
REVIEW
Thomas E Rossor, Katie A Hunt, Sandeep Shetty, Anne Greenough
BACKGROUND: Effective synchronisation of infant respiratory effort with mechanical ventilation may allow adequate gas exchange to occur at lower peak airway pressures, potentially reducing barotrauma and volutrauma and development of air leaks and bronchopulmonary dysplasia. During neurally adjusted ventilatory assist ventilation (NAVA), respiratory support is initiated upon detection of an electrical signal from the diaphragm muscle, and pressure is provided in proportion to and synchronous with electrical activity of the diaphragm (EADi)...
October 27, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29072087/respiratory-muscle-function-and-exercise-limitation-in-patients-with-chronic-obstructive-pulmonary-disease-a-review
#16
Noppawan Charususin, Sauwaluk Dacha, Rik Gosselink, Marc Decramer, Andreas von Leupoldt, Thomas Reijnders, Zafeiris Louvaris, Daniel Langer
Respiratory muscle dysfunction is common and contributes to dyspnea and exercise limitation in patients with chronic obstructive pulmonary disease (COPD). Improving dynamic function of respiratory muscles during exercise might help to reduce symptoms and improve exercise capacity. Areas covered: The aims of this review are to 1) summarize physiological mechanisms linking respiratory muscle dysfunction to dyspnea and exercise limitation; 2) provide an overview of available therapeutic approaches to better maintain load-capacity balance of respiratory muscles during exercise; and 3) to summarize current knowledge on potential mechanisms explaining effects of interventions aimed at optimizing dynamic respiratory muscle function with a special focus on inspiratory muscle training...
October 26, 2017: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/29070631/the-k%C3%A3-lliker-fuse-orchestrates-the-timing-of-expiratory-abdominal-nerve-bursting
#17
William H Barnett, Sarah E M Jenkin, William K Milsom, Julian F R Paton, Ana P L Abdala, Yaroslav I Molkov, Daniel B Zoccal
Coordination of respiratory pump and valve muscle activity is essential for normal breathing. A hallmark respiratory responses to hypercapnia and hypoxia is the emergence of active exhalation, characterized by abdominal muscle pumping during the late one-third of expiration (late-E phase). Late-E abdominal activity during hypercapnia has been attributed to the activation of expiratory neurons located within the parafacial respiratory group (pFRG). However, the mechanisms that control emergence of active exhalation, and its silencing in restful breathing, are not completely understood...
October 25, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29068881/correction-of-paradoxical-ribcage-motion-in-scoliosis-by-non-invasive-ventilation
#18
William J M Kinnear, Milind Sovani, Arun Khanna, Juliet Colt
STUDY DESIGN: Observational study of ribcage motion in scoliosis. OBJECTIVE: To see if non-invasive ventilation corrected paradoxical inward motion of the ribs during inspiration. SUMMARY OF BACKGROUND DATA: Paradoxical inward motion of the ribs is observed following rib fractures, low cervical cord injury and in chronic obstructive pulmonary disease. It is not well recognised in scoliosis and the mechanism in this group has not been studied...
October 24, 2017: Spine
https://www.readbyqxmd.com/read/29066876/comparative-study-of-two-different-respiratory-training-protocols-in-elderly-patients-with-chronic-obstructive-pulmonary-disease
#19
Sherin Hassan Mohammed Mehani
AIM: The aim of the present study was to compare threshold inspiratory muscle training (IMT) and expiratory muscle training (EMT) in elderly male patients with moderate degree of COPD. MATERIALS AND METHODS: Forty male patients with moderate degree of COPD were recruited for this study. They were randomly divided into two groups: the IMT group who received inspiratory training with an intensity ranging from 15% to 60% of their maximal inspiratory pressure, and the EMT group who received expiratory training with an equal intensity which was adjusted according to the maximal expiratory pressure...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/29062231/positive-end-expiratory-pressure-attenuates-hemodynamic-effects-induced-by-an-overload-of-inspiratory-muscles-in-patients-with-copd
#20
Flavia Schaper-Magalhães, José Felippe Pinho, Carolina Andrade Bragança Capuruço, Maria Glória Rodrigues-Machado
BACKGROUND: Inspiratory muscle training (IMT) using a Threshold(®) device is commonly used to improve the strength and endurance of inspiratory muscles. However, the effect of IMT, alone or with positive end-expiratory pressure (PEEP), on hemodynamic parameters in patients with chronic obstructive pulmonary disease (COPD) remains unknown. OBJECTIVE: To assess the effects of an overload of inspiratory muscles using IMT fixed at 30% of the maximal inspiratory pressure (MIP), and IMT associated with 5 cmH2O of PEEP (IMT + PEEP), on the echocardiographic parameters in healthy subjects and patients with COPD...
2017: International Journal of Chronic Obstructive Pulmonary Disease
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