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Work of breathing

Nuria Roldan, Thomas K M Nyholm, J Peter Slotte, Jesús Pérez-Gil, Begoña García-Álvarez
To allow breathing and prevent alveolar collapse, lung surfactant (LS) develops a complex membranous system at the respiratory surface. LS is defined by a specific protein and lipid composition, including saturated and unsaturated phospholipid species and cholesterol. Surfactant protein C (SP-C) has been suggested to be an essential element for sustaining the presence of cholesterol in surfactant without functional impairment. In this work, we used a fluorescent sterol-partitioning assay to assess the effect of the surfactant proteins SP-B and SP-C on cholesterol distribution in membranes...
October 18, 2016: Biophysical Journal
Jennifer Shin Zank, Rani Singh, Michele Carney
Vigorous coughing leading to internal carotid artery dissection has been described in the adult literature but has not been reported in the pediatric population. We describe an 8-year-old right-handed girl who had a 1-week history of increased work of breathing and vigorous coughing. She initially presented to her pediatrician's office for her respiratory symptoms which improved with steroid therapy and albuterol treatments. However, she developed evolving left-sided motor weakness over the course of 2 days and presented to our pediatric emergency department where she was found to have an ischemic stroke in the right corona radiata with a right internal carotid artery dissection...
October 2016: Pediatric Emergency Care
Floriana Pinto, Gianni Biancofiore
BACKGROUND: The ABCDE (Awakening and Breathing coordination of daily sedation and ventilator removal trials; Choice of sedative or analgesic exposure; Delirium monitoring and management; and Early mobility and exercise) bundle is a multidisciplinary set of evidence-based practices for improving patient outcomes in the intensive care unit. Nurses are critical to all the bundle's requirements. Therefore, understanding their knowledge, attitudes, and perception of the different bundle's components might help for an easier implementation into everyday clinical practice...
November 2016: Dimensions of Critical Care Nursing: DCCN
Sushil Chandra, Greeshma Sharma, Mansi Sharma, Devendra Jha, Alok Pakash Mittal
Sudarshan Kriya Yoga (SKY) is a type of rhythmic breathing activity, trivially a form of Pranayama that stimulates physical, mental, emotional, and social well-being. The objective of the present work is to verify the effect of meditation in optimizing task efficiency and regulating stress. It builds on to quantitatively answer if SKY will increase workload tolerance for divided attention tasks in the people sank in it. EEG and ECG recordings were taken from a total of twenty-five subjects who had volunteered for the experiment...
July 18, 2016: Brain Informatics
Robert E Kelly, Robert J Obermeyer, Donald Nuss
BACKGROUND: Recently, technical improvement in the ability to measure lung function and the severity of chest deformity have enabled progress in understanding the mechanism of limitations of lung function in pectus excavatum. METHODS: After establishing that most patients with pectus excavatum do have symptoms of exercise intolerance, easy fatigability, and shortness of breath with exertion, lung function has been evaluated by a variety of methods in different centers...
September 2016: Annals of Cardiothoracic Surgery
Ankit Mangla, Nikki Agarwal, Chou Carmel, Thomas Lad
Erlotinib is one of the most widely used tyrosine kinase inhibitor targeting human epidermal growth factor receptor. Since its introduction, it has revolutionized the treatment of advanced non-small cell lung cancer. Skin rashes and diarrhea are the most often reported side effects of erlotinib however it is also associated with interstitial pneumonitis or interstitial lung disease, which often turns out to be fatal complication of using this medicine. Though reported scarcely in the western world, the association of interstitial lung disease with epidermal growth factor receptor has attracted a lot of attention in the recent times...
September 5, 2016: Rare Tumors
Zach Rozenbaum, Shafik Khoury, Galit Aviram, Yaniv Gura, Jack Sherez, Avi Man, Jason Shimiaie, Thierry Le Tourneau, Amir Halkin, Simon Biner, Gad Keren, Yan Topilsky
BACKGROUND: Discriminating circulatory problems with reduced stroke volume from de-conditioning in which the muscles cannot consume O2 normally by gas exchange parameters is difficult. METHODS: We performed combined stress echo and cardio-pulmonary (CPET) tests in 110 patients (20 normal effort capacity, 54 attenuated stroke volume response, 36 de-conditioning) to evaluate multiple hemodynamic parameters and oxygen content difference (A-VO2 Difference) in four predefined activity levels to assess which of the gas measures may help in the discrimination...
October 11, 2016: Chest
Hung-Yu Huang, Pai-Chien Chou, Wen-Ching Joa, Li-Fei Chen, Te-Fang Sheng, Horng-Chyuan Lin, Lan-Yan Yang, Yu-Bin Pan, Fu-Tsai Chung, Chun-Hua Wang, Han-Pin Kuo
Pulmonary rehabilitation (PR) brings benefits to patients with chronic obstructive pulmonary disease (COPD). Negative pressure ventilation (NPV) increases ventilation and decreases hyperinflation as well as breathing work in COPD. We evaluated the long-term effects of a hospital-based PR program coupled with NPV support in patients with COPD on clinical outcomes.One hundred twenty-nine patients with COPD were followed up for more than 5 years, with the NPV group (n = 63) receiving the support of NPV (20-30 cm H2O delivery pressure for 60 min) and unsupervised home exercise program of 20 to 30 min daily walk, while the control group (n = 6) only received unsupervised home exercise program...
October 2016: Medicine (Baltimore)
Philippe Jolliet, Lamia Ouanes-Besbes, Fekri Abroug, Jalila Ben Khelil, Mohamed Besbes, Aude Garnero, Jean-Michel Arnal, Fabrice Daviaud, Jean-Daniel Chiche, Benoît Lortat-Jacob, Jean-Luc Diehl, Nicolas Lerolle, Alain Mercat, Keyvan Razazi, Christian Brun-Buisson, Isabelle Durand-Zaleski, Joëlle Texereau, Laurent Brochard
RATIONALE: During non-invasive ventilation (NIV) for COPD exacerbations, Helium/Oxygen (He/O2) reduces work of breathing and hypercapnia more than Air/O2 but impact on clinical outcome remains unknown. OBJECTIVE: To determine whether continuous administration of He/O2 for 72 hours, during and in-between NIV sessions, is superior to Air/O2 in reducing NIV failure (25% to 15%) in severe hypercapnic COPD exacerbations. METHODS: Prospective, randomized, open-label trial (16 intensive care units, 6 countries)...
October 13, 2016: American Journal of Respiratory and Critical Care Medicine
Wei-Te Wu, Su-Shan Tsai, Yu-Jen Lin, Ming-Hsiu Lin, Trong-Neng Wu, Tung-Sheng Shih, Saou-Hsing Liou
BACKGROUND: Professional drivers' work under conditions predisposes them for development of sleep-disordered breathing (SDB) and cardiovascular disease (CVD). However, the effect of SDB on CVD risk among professional drivers has never been investigated. A cohort study was used to evaluate the effectiveness of overnight pulse oximeter as a sleep apnea screening tool to assess the 8-year risk of CVD events. METHODS: The Taiwan Bus Driver Cohort Study (TBDCS) recruited 1014 professional drivers in Taiwan since 2005...
September 29, 2016: International Journal of Cardiology
Vibe Maria Laden Nielsen, Jacob Madsen, Anette Aasen, Anne Pernille Toft-Petersen, Kenneth Lübcke, Bodil Steen Rasmussen, Erika Frischknecht Christensen
BACKGROUND: Patients with acute respiratory failure are at risk of deterioration during prehospital transport. Ventilatory support with continuous positive airway pressure (CPAP) can be initiated in the prehospital setting. The objective of the study is to evaluate adherence to treatment and effectiveness of CPAP as an addition to standard care. METHODS: In North Denmark Region, patients with acute respiratory failure, whom paramedics assessed as suffering from acute cardiopulmonary oedema, acute exacerbation of chronic obstructive pulmonary disease or asthma were treated with CPAP using 100 % O2 from 1 March 2014 to 3 May 2015...
October 10, 2016: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Glenda Cook, Cathy Bailey, Philip Hodgson, Joanne Gray, Emma Barron, Christine McMillan, Roy Marston, Eleanor Binks, Joanne Rose
The aim of this study was to examine sheltered housing tenants' views of health and well-being, the strategies they adopted to support their well-being, and their use of health and social care services through a Health Needs Assessment. Sheltered housing in the UK is a form of service-integrated housing for people, predominantly over 60. The study used a parallel, three-strand mixed method approach to encompass the tenants' perceptions of health and well-being (n = 96 participants), analysis of the service's health and well-being database, and analysis of emergency and elective hospital admissions (n = 978 tenant data sets for the period January to December 2012)...
October 10, 2016: Health & Social Care in the Community
Darío Villalba, Viviana Feld, Valeria Leiva, Mariana Scrigna, Eduardo Distéfano, Romina Pratto, Matías Rodriguez, Jesica Collins, Ana Rocco, Amelia Matesa, Damián Rossi, Laura Areas, Sacha Virgilio, Nicolás Golfarini, Gregorio Gil-Rosetti, Pablo Diaz-Ballve, Fernando Planells
OBJECTIVE: To describe and compare the work of breathing (WOB) during spontaneous breathing under four conditions: (1) breathing through a tracheostomy tube with an inflated cuff, (2) breathing through the upper airway (UA) with a deflated cuff and occluded tube, (3) breathing through the UA with an occluded cuffless tube, and (4) postdecannulation. PATIENTS AND METHODS: Patients who tolerated an occluded cuffless tube were included. Ventilatory variables and esophageal pressure were recorded...
July 2016: International Journal of Critical Illness and Injury Science
Ryan P Dumas, Niels D Martin
No abstract text is available yet for this article.
July 2016: International Journal of Critical Illness and Injury Science
Ya-Chen Chen, Tzu-Chien Hsiao
BACKGROUND: Thoracoabdominal asynchrony is often adopted to discriminate respiratory diseases in clinics. Conventionally, Lissajous figure analysis is the most frequently used estimation of the phase difference in thoracoabdominal asynchrony. However, the temporal resolution of the produced results is low and the estimation error increases when the signals are not sinusoidal. Other previous studies have reported time-domain procedures with the use of band-pass filters for phase-angle estimation...
October 6, 2016: Biomedical Engineering Online
Alireza Nejati, Natalia Kabaliuk, Mark C Jermy, John E Cater
BACKGROUND: Understanding airflow through human airways is of importance in drug delivery and development of assisted breathing methods. In this work, we focus on development of a new method to obtain an averaged upper airway geometry from computed tomography (CT) scans of many individuals. This geometry can be used for air flow simulation. We examine the geometry resulting from a data set consisting of 26 airway scans. The methods used to achieve this include nasal cavity segmentation and a deformable template matching procedure...
October 1, 2016: BMC Medical Imaging
Jorge Rey de Castro, Alicia Liendo, T Oswaldo Ortiz, Edmundo Rosales-Mayor, César Liendo
OBJECTIVES: By measuring the apnea length, ventilatory phase, respiratory cycle length, and loop gain, we can further characterize the central apneas of high altitude (CAHA). METHODS: Sixty-three drivers of all-terrain vehicles, working in a Peruvian mine located at 2020 meters above sea level (MASL), were evaluated. A respiratory polygraph was performed in the first night they slept at high altitude. None of the subjects were exposed to oxygen during the test or acetazolamide in the preceding days of the test...
September 29, 2016: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
Mirjana Josipovic, Gitte F Persson, Jens Peter Bangsgaard, Lena Specht, Marianne C Aznar
OBJECTIVES: We investigated the impact of deep inspiration breath-hold (DIBH) and tumour baseline shifts on image quality and registration uncertainty in image guided DIBH radiotherapy for locally advanced lung cancer. METHODS: Patients treated with daily cone beam CT (CBCT) guided free-breathing (FB) radiotherapy had an additional CBCT in DIBH at three fractions. These CBCTs were off-line rigidly registered (on tumour) to FB and DIBH CTs acquired at planning. All registrations were repeated to evaluate the intra-observer uncertainty...
October 6, 2016: British Journal of Radiology
Carmenlita Chief, Samantha Sabo, Hershel Clark, Patricia Nez Henderson, Alfred Yazzie, Jacqueline Nahee, Scott J Leischow
INTRODUCTION: Indigenous worldviews and research approaches are fundamental to make meaning of complex health issues and increase the likelihood of identifying existing cultural protective factors that have contributed to the resilience and survival of Indigenous people worldwide. OBJECTIVE: We describe the process for applying the Diné (Navajo) paradigm of Są'áh Naagháí Bik'eh Hózhóó (SNBH), a belief system that guides harmonious living, and demonstrate how the application of SNBH enhances understanding of Navajo principles for well-being...
October 2016: Tobacco Control
Daniel P Redmond, Yeong Shiong Chiew, Vincent Major, J Geoffrey Chase
Monitoring of respiratory mechanics is required for guiding patient-specific mechanical ventilation settings in critical care. Many models of respiratory mechanics perform poorly in the presence of variable patient effort. Typical modelling approaches either attempt to mitigate the effect of the patient effort on the airway pressure waveforms, or attempt to capture the size and shape of the patient effort. This work analyses a range of methods to identify respiratory mechanics in volume controlled ventilation modes when there is patient effort...
September 23, 2016: Computer Methods and Programs in Biomedicine
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