keyword
MENU ▼
Read by QxMD icon Read
search

Exhaled breath

keyword
https://www.readbyqxmd.com/read/28333703/higher-fresh-gas-flow-rates-decrease-tidal-volume-during-pressure-control-ventilation
#1
Shazia Mohammad, Nikolaus Gravenstein, Drew Gonsalves, Terrie Vasilopoulos, Samsun Lampotang
BACKGROUND: We observed that increasing fresh gas flow (FGF) decreased exhaled tidal volume (VT) during pressure control ventilation (PCV). A literature search produced no such description whereby unintended VT changes occur with FGF changes during PCV. METHODS: To model an infant's lungs, 1 lung of a mechanical lung model (Dual Adult TTL 1600; Michigan Instruments, Inc, Grand Rapids, MI) was set at a compliance of 0.0068 L/cm H2O. An Rp50 resistor (27.2 cm H2O/L/s at 15 L/min) simulated normal bronchial resistance...
March 22, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28325004/study-of-phase-estimation-methods-to-analyse-cardiorespiratory-synchronization-in-osa-patients
#2
Jordi Sola-Soler, Beatriz F Giraldo, Jose A Fiz, Raimon Jane
Obstructive Sleep Apnea (OSA) is a sleep disorder highly prevalent in the general population. Cardiorespiratory Phase Synchronization (CRPS) is a form of non-linear interaction between respiratory and cardiovascular systems that was found to be reduced in severe OSA patients. The Hilbert Transform (HT) method was the recommended choice for estimating the respiratory phase in CRPS studies. But we have noticed that HT provides a phase that is aligned to the transition between the exhalation and the inhalation parts of different breathing cycles, instead of being aligned to the breathing onsets...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324898/breathing-and-swallowing-the-next-frontier
#3
Roxann Diez Gross, Marybeth Trapani-Hanasewych
The anatomical overlap of the pathways for air passage and nutrition necessitate precise coordination between the two vital functions. Neuroanatomic structures in the brainstem for sucking, breathing, and swallowing are also in close proximity and must swiftly coordinate the processes. In a healthy neonate, the oropharyngeal experience and stimulation of early feeding enables respiratory control during suckling to develop. Despite wide variability among the methods used to investigate breathing and swallowing coordination in infancy, a consistent finding of postswallow exhalation has been reported...
April 2017: Seminars in Speech and Language
https://www.readbyqxmd.com/read/28321261/diagnostic-performance-of-soluble-triggering-receptor-expressed-on-myeloid-cells-1-in-ventilator-associated-pneumonia-of-patients-with-ischemic-stroke
#4
Yuetian Yu, Cheng Zhu, Chunyan Liu, Yuan Gao, Rong Yin, Jianguo Cao
Objective. To investigate the effect of soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) in serum, bronchoalveolar lavage fluid (BALF), endotracheal aspiration (ETA), and exhaled breath condensate (EBC) samples as early biomarkers for the diagnosis of ventilator-associated pneumonia (VAP) in patients with ischemic stroke. Methods. One hundred and thirty-two patients with clinically suspected VAP were enrolled in this study. Bronchoscopy was performed on the day of clinically suspected VAP...
2017: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/28297449/mri-quantification-of-pancreas-motion-as-a-function-of-patient-setup-for-particle-therapy-a-preliminary-study
#5
Giulia Fontana, Marco Riboldi, Chiara Gianoli, Cezarina I Chirvase, Gaetano Villa, Chiara Paganelli, Paul E Summers, Barbara Tagaste, Andrea Pella, Piero Fossati, Mario Ciocca, Guido Baroni, Francesca Valvo, Roberto Orecchia
Particle therapy (PT) has shown positive therapeutic results in local control of locally advanced pancreatic lesions. PT effectiveness is highly influenced by target localization accuracy both in space, since the pancreas is located in proximity to radiosensitive vital organs, and in time as it is subject to substantial breathing-related motion. The purpose of this preliminary study was to quantify pancreas range of motion under typical PT treatment conditions. Three common immobilization devices (vacuum cushion, thermoplastic mask, and compressor belt) were evaluated on five male patients in prone and supine positions...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297332/impact-of-incorporating-visual-biofeedback-in-4d-mri
#6
David T To, Joshua P Kim, Ryan G Price, Indrin J Chetty, Carri K Glide-Hurst
Precise radiation therapy (RT) for abdominal lesions is complicated by respiratory motion and suboptimal soft tissue contrast in 4D CT. 4D MRI offers improved contrast although long scan times and irregular breathing patterns can be limiting. To address this, visual biofeedback (VBF) was introduced into 4D MRI. Ten volunteers were consented to an IRB-approved protocol. Prospective respiratory-triggered, T2-weighted, coronal 4D MRIs were acquired on an open 1.0T MR-SIM. VBF was integrated using an MR-compatible interactive breath-hold control system...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296319/validation-of-the-calypso-surface-beacon-transponder
#7
Maxwell Belanger, Ziad Saleh, Tom Volpe, Rich Margiasso, Xiang Li, Maria Chan, Xiaofeng Zhu, Xiaoli Tang
Calypso L-shaped Surface Beacon transponder has recently become available for clinical applications. We herein conduct studies to validate the Surface Beacon transponder in terms of stability, reproducibility, orientation sensitivity, cycle rate dependence, and respiratory waveform tracking accuracy. The Surface Beacon was placed on a Quasar respiratory phantom and positioned at the isocenter with its two arms aligned with the lasers. Breathing waveforms were simulated, and the motion of the transponder was tracked...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28295147/a-prospective-randomised-trial-of-pre-oxygenation-strategies-available-in-the-pre-hospital-environment
#8
C J Groombridge, E Ley, M Miller, T Konig
Pre-oxygenation before tracheal intubation aims to increase safe apnoea duration by denitrogenation of the functional residual capacity of the lungs, and increasing oxygen stores at the onset of apnoea. Pre-oxygenation options in the pre-hospital environment are limited due to oxygen availability and equipment portability. The aim of this study was to evaluate the effectiveness of strategies available in this setting. This was a prospective, randomised, crossover study of 30 healthy volunteers who underwent 3-min periods of pre-oxygenation by tidal volume breathing with a non-rebreather mask, a bag-valve-mask and a portable ventilator...
March 14, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28294871/-proton-transfer-reaction-mass-spectrometry-of-exhaled-breath-in-diagnostics-of-heart-failure
#9
Ph Yu Kopylov, A L Syrkin, P Sh Chomakhidze, A A Bykova, D Yu Shhekochihin, Yu R Shaltaeva, V V Belyakov, V S Pershenkov, N N Samotaev, A V Golovin, V K Vasil'ev, E K Malkin, E A Gromov, I A Ivanov, D Ju Lipatov, D Ju Yakovlev, V B Betelin
Exhaled breath analysis is one of directions in the search for novel biomarkers of chronic heart failure (CHF). According.
May 2016: Kardiologiia
https://www.readbyqxmd.com/read/28294105/breath-acetone-as-a-potential-marker-in-clinical-practice
#10
Vera Ruzsanyi, Miklós Kalapos
In recent decades, two facts have changed the opinion of researchers about the function of acetone in humans. Firstly, it has turned out that acetone cannot be regarded as simply a waste product of metabolism, because there are several pathways in which acetone is produced or broken down. Secondly, methods have emerged making possible its detection in exhaled breath, thereby offering an attractive alternative to investigation of blood and urine samples. From a clinical point of view the measurement of breath acetone levels are important, but there are limitations to its wide application...
March 15, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28292973/evaluation-of-functional-characteristics-of-4-oscillatory-positive-pressure-devices-in-a-simulated-cystic-fibrosis-model
#11
Hillary Van Fleet, Diane K Dunn, Neil L McNinch, Teresa A Volsko
BACKGROUND: Oscillatory positive expiratory pressure (OPEP) is an airway clearance therapy that delivers positive pressure and air-flow oscillations during exhalation. This study described functional characteristic differences of 4 OPEP devices during an active exhalation in a simulated model. We hypothesized peak pressure (Ppeak), positive expiratory pressure (PEP), oscillatory frequency (f), and pressure amplitude will differ, depending upon the device used, device resistance setting, and time (repeated consecutive active exhalations through the device)...
March 14, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28291918/organ-motion-in-pediatric-high-risk-neuroblastoma-patients-using-four-dimensional-computed-tomography
#12
Sneha Kannan, Boon-Keng Kevin Teo, Timothy Solberg, Christine Hill-Kayser
PURPOSE/OBJECTIVE(S): High-risk neuroblastoma (HR-NBL) requires multimodality treatment, including external beam radiation of the primary tumor site following resection. Radiotherapy planning must take into account motion of the target and adjacent normal anatomy, both of which are poorly understood in the pediatric population, and which may differ significantly from those in adults. METHODS/MATERIALS: We examined 4DCT scans of 15 consecutive pediatric patients treated for HR-NBL, most with tumors in the abdominal cavity...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28282228/evaluation-of-exhaled-breath-temperature-ebt-as-a-marker-and-predictor-of-asthma-exacerbation-in-children-and-adolescents
#13
Irena Wojsyk-Banaszak, Marcin Mikoś, Aleksandra Szczepankiewicz, Alicja Wielebska, Paulina Sobkowiak, Aleksandra Kamińska, Anna Bręborowicz
INTRODUCTION: Noninvasive and easy-to-use tools to monitor airway inflammation in asthma are needed to maintain disease control, particularly in pediatric population. The aim of the study was to evaluate exhaled breath temperature (EBT) in pediatric respiratory clinic setting. METHODS: We evaluated 37 children and adolescents with asthma (5-17 years; median: 11 years). The patients were followed up in stable condition and during exacerbations (paired observations in n = 19 subjects)...
March 10, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28277815/exhaled-particles-after-a-standardized-breathing-maneuver
#14
Björn Bake, Evert Ljungström, Annika Claesson, Hanne Krage Carlsen, Matthias Holm, Anna-Carin Olin
BACKGROUND: Particles in exhaled air (PEx) provide samples of respiratory tract lining fluid from small airways and offer a new opportunity to monitor pathological changes. The exhaled particles are produced by reopening of closed small airways and contain surfactant. The amount of PEx varies by orders of magnitude among subjects. A standardized breathing pattern reduces the variation, but it remains large and the reasons are unknown. The aim of the present study was to assess to what extent sex, age, body size, and spirometry results explain the interindividual variation of PEx among healthy middle-aged subjects...
March 9, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28277810/the-impact-of-common-inhaler-errors-on-drug-delivery-investigating-critical-errors-with-a-dry-powder-inhaler
#15
Imran Sulaiman, Jansen Seheult, Nirmal Sadasivuni, Elaine MacHale, Isabelle Killane, Spiros Giannoutsos, Breda Cushen, Matshediso Constantina Mokoka, Aoife Sartini Bhreathnach, Fiona Boland, Richard B Reilly, Richard W Costello
BACKGROUND: Researchers, using checklists, have identified that 30%-90% of patients make errors in inhaler use. It is not certain whether these errors affect the delivery of medication. We have developed an electronic monitor (INCA™) that records audio each time an inhaler is used, providing objective information on inhaler technique. The aim of this study was to assess the effect that correctly identified inhaler errors, with the INCA device, have on drug delivery. METHODS: This was a prospective study of healthy volunteers using a salbutamol Diskus™...
March 9, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28273583/global-dna-methylation-and-oxidative-stress-biomarkers-in-workers-exposed-to-metal-oxide-nanoparticles
#16
Saou-Hsing Liou, Wei-Te Wu, Hui-Yi Liao, Chao-Yu Chen, Cheng-Yen Tsai, Wei-Ting Jung, Hui-Ling Lee
This is the first study to assess global methylation, oxidative DNA damage, and lipid peroxidation in workers with occupational exposure to metal oxide nanomaterials (NMs). Urinary and white blood cell (WBC) 8-hydroxydeoxyguanosine (8-OHdG), and exhaled breath condensate (EBC) 8-isoprostane were measured as oxidative stress biomarkers. WBC global methylation was measured as an epigenetic alteration. Exposure to TiO2, SiO2, and indium tin oxide (ITO) resulted in significantly higher oxidative biomarkers such as urinary 8-OHdG and EBC 8-isoprostane...
February 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28273273/prevalence-of-small-intestine-bacterial-overgrowth-in-patients-with-gastrointestinal-symptoms
#17
Carolina Piedade Martins, Caio Henrique Amorim Chaves, Maurício Gustavo Bravim de Castro, Isabel Cristina Gomes, Maria do Carmo Friche Passos
BACKGROUND: Small intestine bacterial overgrowth is a heterogeneous syndrome characterized by an increase in the number and/or the presence of atypical microbiota in the small intestine. The symptoms of small intestine bacterial overgrowth are unspecific, encompassing abdominal pain/distension, diarrhea and flatulence. Due to the increased cost and complexity for carrying out the jejunal aspirate, the gold standard for diagnosis of the syndrome, routinely the hydrogen (H 2 ) breath test has been used, utilizing glucose or lactulose as substrate, which is able to determine, in the exhaled air, the H 2 concentration produced from the intestinal bacterial metabolism...
February 23, 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28269229/a-study-of-apnea-induced-covariations-of-cerebral-blood-flow-and-exhaled-co2
#18
Varun Kanal, Raichel Alex, Nazaneen Mousavi, Kevin Jepsen, Donald E Watenpaugh, Rong Zhang, Khosrow Behbehani
Sleep apnea is identified by repetitive reduction or complete cessation of breathing during sleep. Sleep apnea affects cerebral hemodynamics and it is important to study this effect. Measuring cerebral blood flow during sleep is challenging due to the need to maintain a contact between the flow probe and the skull. It is hypothesized that there exists a relationship between the variations in the exhaled CO2 and Cerebral Blood Flow during sleep apnea. To test this hypothesis, the present study was conducted in two parts: simulated and nocturnal sleep study...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28263525/markers-of-nucleic-acids-and-proteins-oxidation-among-office-workers-exposed-to-air-pollutants-including-nano-tio2-particles
#19
Daniela Pelclova, Vladimir Zdimal, Petr Kacer, Stepanka Vlckova, Zdenka Fenclova, Tomas Navratil, Martin Komarc, Jaroslav Schwarz, Nadezda Zikova, Otakar Makes, Sergey Zakharov
OBJECTIVES: Experimental studies using nanoscale TiO2 have documented lung injury, inflammation, oxidative stress, and genotoxicity. Human health data are extremely scarce. METHODS: In exhaled breath condensate (EBC) and urine of 22 office employees occupationally exposed to TiO2 during their visit in the production workshops for average 14±9 min/day a panel of biomarkers of nucleic acids and proteins oxidation was studied, specifically 8-hydroxy-2-deoxyguanosine (8-OHdG), 8-hydroxyguanosine (8-OHG), 5-hydroxymethyl uracil (5-OHMeU), o-tyrosine (o-Tyr), 3-chlorotyrosine (3-ClTyr), and 3-nitrotyrosine (3-NOTyr)...
December 18, 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28260695/non-invasive-breath-monitoring-with-enose-does-not-improve-glucose-diagnostics-in-critically-ill-patients-in-comparison-to-continuous-glucose-monitoring-in-blood
#20
Jan Hendrik Leopold, Lieuwe Bos, Camilla Colombo, Peter Sterk, Marcus Schultz, Ameen Abu-Hanna
INTRODUCTION: Continuous glucose monitoring (CGM) can be beneficiary in critically ill patients. Current CGM devices rely on subcutaneous or blood plasma glucose measurements and consequently there is an increased risk of infections and the possibility of loss of blood with each measurement. A potential method to continuously and non-invasively measure blood glucose levels is using exhaled breath. A correlation between blood glucose levels and volatile organic compounds (VOCs) in the exhaled breath was already reported...
March 6, 2017: Journal of Breath Research
keyword
keyword
25171
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"