keyword
MENU ▼
Read by QxMD icon Read
search

Tidal volume

keyword
https://www.readbyqxmd.com/read/29778239/time-dependent-changes-in-cardiorespiratory-functions-of-anesthetized-rats-exposed-to-sustained-hypoxia
#1
Kouki Kato, Ryosuke Morinaga, Seigo Fushuku, Nobuaki Nakamuta, Yoshio Yamamoto
Although cardiovascular responses may be altered by respiratory changes under prolonged hypoxia, the relationship between respiratory and cardiovascular changes remains unknown. The aim of the present study is to clarify cardiorespiratory changes in anesthetized rats during and after hypoxic conditions using simultaneous recordings of cardiorespiratory variables with 20-sec recording intervals. After air breathing for 20 min (pre-exposure period), rats were subjected to 10% O2 for 2 h (hypoxic exposure period) and then air for 30 min (recovery period)...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29776982/variable-effectiveness-of-stepwise-implementation-of-nudge-type-interventions-to-improve-provider-compliance-with-intraoperative-low-tidal-volume-ventilation
#2
Vikas N O'Reilly-Shah, George S Easton, Craig S Jabaley, Grant C Lynde
BACKGROUND: Identifying mechanisms to improve provider compliance with quality metrics is a common goal across medical disciplines. Nudge interventions are minimally invasive strategies that can influence behavioural changes and are increasingly used within healthcare settings. We hypothesised that nudge interventions may improve provider compliance with lung-protective ventilation (LPV) strategies during general anaesthesia. METHODS: We developed an audit and feedback dashboard that included information on both provider-level and department-level compliance with LPV strategies in two academic hospitals, two non-academic hospitals and two academic surgery centres affiliated with a single healthcare system...
May 18, 2018: BMJ Quality & Safety
https://www.readbyqxmd.com/read/29775671/variable-ventilation-decreases-airway-responsiveness-and-improves-ventilation-efficiency-in-a-rat-model-of-asthma
#3
Fatemeh Ilka, Mohammad Javan, Mohammad Reza Raoufy
The optimal ventilation strategy in patients receiving mechanical ventilation for severe asthma remains unclear. The effect of conventional ventilation (with constant tidal volume and respiratory rate) and variable ventilation (with the same average but variable tidal volume and respiratory rate) on peak airway pressure and airway exacerbation induced by increasing doses of methacholine was compared in a rat model of asthma. The respiratory rate and tidal volume data were obtained from a spontaneously breathing intact rat during immobility using a whole-body plethysmograph...
May 15, 2018: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29771711/respiratory-muscle-effort-during-expiration-in-successful-and-failed-weaning-from-mechanical-ventilation
#4
Jonne Doorduin, Lisanne H Roesthuis, Diana Jansen, Johannes G van der Hoeven, Hieronymus W H van Hees, Leo M A Heunks
BACKGROUND: Respiratory muscle weakness in critically ill patients is associated with difficulty in weaning from mechanical ventilation. Previous studies have mainly focused on inspiratory muscle activity during weaning; expiratory muscle activity is less well understood. The current study describes expiratory muscle activity during weaning, including tonic diaphragm activity. The authors hypothesized that expiratory muscle effort is greater in patients who fail to wean compared to those who wean successfully...
May 16, 2018: Anesthesiology
https://www.readbyqxmd.com/read/29766672/ribcage-deformity-and-the-altered-breathing-pattern-in-children-with-osteogenesis-imperfecta
#5
Antonella LoMauro, Paolo Fraschini, Simona Pochintesta, Marianna Romei, Maria G D'Angelo, Andrea Aliverti
AIM: Osteogenesis Imperfecta (OI) is a genetic disease characterized by bones fragility and progressive deformity. Life expectancy is reduced in the non-lethal most severe type III form before the age of 10 years. The main cause of death in OI is respiratory insufficiency resulting from impaired thoracic function worsened by ribcage deformity and scoliosis. METHODS: We used opto-electronic plethysmography to study chest geometry, the ventilatory, and the thoraco-abdominal pattern at rest in supine position in children younger than 10 years...
May 15, 2018: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29765004/a-comparison-of-the-adjustable-ranges-of-inspiratory-pressurization-during-pressure-controlled-continuous-mandatory-ventilation-of-5-icu-ventilators
#6
Yukiko Koyama, Akinori Uchiyama, Junko Yoshida, Takeshi Yoshida, Tomonori Yamashita, Yuji Fujino
BACKGROUND: Faster inspiratory pressurization can improve patient-ventilator synchrony and reduce the patient's work of breathing during pressure controlled continuous mandatory (PC-CMV) ventilation. The characteristics of the pressurization ramp settings are not standardized across ventilators from different manufacturers. We performed a bench test of 5 models of ICU ventilators to examine the effects of pressurization ramp settings on the actual pressurization. METHODS: A twin-bellows lung model was used, in which one bellow simulates inspiratory muscle activity and the other simulates an adult normal lung model...
May 15, 2018: Respiratory Care
https://www.readbyqxmd.com/read/29763713/practice-of-mechanical-ventilation-in-cardiac-arrest-patients-and-effects-of-targeted-temperature-management-a-substudy-of-the-targeted-temperature-management-trial
#7
Matthew B A Harmon, David M P van Meenen, Annelou L I P van der Veen, Jan M Binnenkade, Josef Dankiewicz, Florian Ebner, Niklas Nielsen, Paolo Pelosi, Marcus J Schultz, Janneke Horn, Hans Friberg, Nicole P Juffermans
AIMS: Mechanical ventilation practices in patients with cardiac arrest are not well described. Also, the effect of temperature on mechanical ventilation settings is not known. The aims of this study were 1) to describe practice of mechanical ventilation and its relation with outcome 2) to determine effects of different target temperatures strategies (33 °C versus 36 °C) on mechanical ventilation settings. METHODS: This is a substudy of the TTM-trial in which unconscious survivors of a cardiac arrest due to a cardiac cause were randomized to two TTM strategies, 33 °C (TTM33) and 36 °C (TTM36)...
May 12, 2018: Resuscitation
https://www.readbyqxmd.com/read/29762314/effectiveness-of-dexmedetomidine-versus-propofol-on-extubation-times-length-of-stay-and-mortality-rates-in-adult-cardiac-surgery-patients-a-systematic-review-and-meta-analysis
#8
John Nguyen, Noel Nacpil
OBJECTIVE: To determine the effects of dexmedetomidine versus propofol on extubation time, intensive care unit (ICU) length of stay, total hospital length of stay and in-hospital mortality rates in cardiac surgery patients. INTRODUCTION: Recovery from cardiovascular surgery involves weaning from mechanical ventilation. Mechanical ventilation decreases the work of breathing for patients by inhaling oxygen and exhaling carbon dioxide via a ventilator or breathing machine...
May 2018: JBI Database of Systematic Reviews and Implementation Reports
https://www.readbyqxmd.com/read/29757925/a-modified-co2-o2-guedel-airway-improves-capnographic-accuracy-compared-with-a-co2-o2-nasal-cannula-an-infant-manikin-study
#9
Jens Moll, Pinelopi Anagnostopoulou, Franz J Frei, Thomas O Erb
BACKGROUND: Capnography via a CO2/O2 nasal cannula is commonly used for respiratory monitoring during sedation. However, signal disturbances are frequently encountered, especially in young children. OBJECTIVE: Sampling ports placed closer to the trachea have been shown to result in improved signal quality. In a manikin model of a 6-month-old infant we compared capnography from a modified Guedel airway with a CO2 port located at the tip with that from a CO2/O2 nasal cannula...
April 30, 2018: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29755755/lung-volumes-identify-an-at-risk-group-in-persons-with-prolonged-secondhand-tobacco-smoke-exposure-but-without-overt-airflow-obstruction
#10
Mehrdad Arjomandi, Siyang Zeng, Jeroen Geerts, Rachel K Stiner, Bruce Bos, Ian van Koeverden, Jason Keene, Brett Elicker, Paul D Blanc, Warren M Gold
Introduction: Exposure to secondhand smoke (SHS) is associated with occult obstructive lung disease as evident by abnormal airflow indices representing small airway disease despite having preserved spirometry (normal forced expiratory volume in 1 s-to-forced vital capacity ratio, FEV1 /FVC). The significance of lung volumes that reflect air trapping in the presence of preserved spirometry is unclear. Methods: To investigate whether lung volumes representing air trapping could determine susceptibility to respiratory morbidity in people with SHS exposure but without spirometric chronic obstructive pulmonary disease, we examined a cohort of 256 subjects with prolonged occupational SHS exposure and preserved spirometry...
2018: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/29754462/predictors-of-outcome-of-prematurely-born-infants-with-pulmonary-interstitial-emphysema
#11
Emma Williams, Theodore Dassios, Paul Clarke, Olie Chowdhury, Anne Greenough
AIM: To determine how oxygenation, ventilation efficiency and tidal volume requirements changed with the development of pulmonary interstitial emphysema (PIE) and whether in affected patients a composite gas exchange index predicted death or bronchopulmonary dysplasia (BPD). METHODS: Infants who developed PIE from 2010 to 2016 were identified. The oxygenation index, ventilation efficiency index, ventilation to perfusion ratio and inspiratory tidal volume were calculated before radiological evidence of PIE (pre-PIE) and at the worst PIE radiographic appearance (PIE-worst)...
May 13, 2018: Acta Paediatrica
https://www.readbyqxmd.com/read/29752160/can-diaphragmatic-breathing-modify-chest-wall-volumes-during-inspiratory-loaded-breathing-in-patients-with-heart-failure
#12
Susan Martins Lage, Raquel Rodrigues Britto, Daniella Cunha Brandão, Danielle Aparecida Gomes Pereira, Armèle Dornelas de Andrade, Verônica Franco Parreira
BACKGROUND: Some inspiratory muscle training protocols for patients with heart failure report the request of diaphragmatic breathing during inspiratory loaded breathing. However, it is unclear whether this condition modifies the chest wall volumes. OBJECTIVE: The primary purpose was to evaluate chest wall volumes during inspiratory loaded breathing as well as during inspiratory loaded breathing associated with diaphragmatic breathing in patients with heart failure...
April 17, 2018: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/29750662/supplemental-carbon-dioxide-stabilizes-the-upper-airway-in-volunteers-anesthetized-with-propofol
#13
Katarina Jennifer Ruscic, Janne Bøgh Stokholm, Johann Patlak, Hao Deng, Jeroen Cedric Peter Simons, Timothy Houle, Jürgen Peters, Matthias Eikermann
BACKGROUND: Propofol impairs upper airway dilator muscle tone and increases upper airway collapsibility. Preclinical studies show that carbon dioxide decreases propofol-mediated respiratory depression. We studied whether elevation of end-tidal carbon dioxide (PETCO2) via carbon dioxide insufflation reverses the airway collapsibility (primary hypothesis) and impaired genioglossus muscle electromyogram that accompany propofol anesthesia. METHODS: We present a prespecified, secondary analysis of previously published experiments in 12 volunteers breathing via a high-flow respiratory circuit used to control upper airway pressure under propofol anesthesia at two levels, with the deep level titrated to suppression of motor response...
May 10, 2018: Anesthesiology
https://www.readbyqxmd.com/read/29746613/aging-effects-on-alveolar-sacs-under-mechanical-ventilation
#14
Parya Aghasafari, Rebeca L Heise, Angela Reynolds, Ramana Pidaparti
Alveolar sacs are primarily responsible for gas exchange in the human respiratory system and lose their functionality with aging. Three-dimensional (3D) models of young and old human alveolar sacs were constructed and fluid-solid interaction (FSI) was employed to investigate the contribution of age-related changes to decline in alveolar sacs function under mechanical ventilation (MV). Simulations results illustrated that compliance and pressure reduced in the alveolar sacs of the elderly, and they have to work harder to breathe...
May 9, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29744251/comparison-of-different-cuff-pressure-use-with-the-supreme-laryngeal-mask-airway-on-haemodynamic-response-seal-pressure-and-postoperative-adverse-events-a-prospective-randomized-study
#15
Achmet Ali, Demet Altun, Nukhet Sivrikoz, Mesut Yornuk, Namigar Turgut, İbrahim Özkan Akıncı
Objective: The Supreme™ laryngeal mask airway (SLMA) is a supra glottic airway (SGA) device that is used as an alternative to endotracheal tubes. In the present study, we aimed to compare the use of the SLMA with normal cuff pressure and low cuff pressure, primarily for haemodynamic response. Methods: In the present study, 120 patients diagnosed with hypertension and scheduled for varicose vein or inguinal hernia operation were enrolled and 99 patients finished...
April 2018: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/29744248/high-dose-of-pralidoxime-reverses-paraoxon-induced-respiratory-toxicity-in-mice
#16
Pascal Houzé, Thomas Berthin, Jean-Herlé Raphalen, Alice Hutin, J Frédéric Baud
Objective: The efficiency of pralidoxime in the treatment of human organophosphates poisoning is still unclear. In a rat model, we showed that pralidoxime induced a complete but concentration-dependent reversal of paraoxon-induced respiratory toxicity. The aim of this study was to assess the efficiency of pralidoxime in a species other than rats. Methods: A dose of diethylparaoxon corresponding to 50% of the median lethal dose was administered subcutaneously to male F1B6D2 mice...
April 2018: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/29743121/high-frequency-oscillatory-ventilation-guided-by-transpulmonary-pressure-in-acute-respiratory-syndrome-an-experimental-study-in-pigs
#17
Philipp Klapsing, Onnen Moerer, Christoph Wende, Peter Herrmann, Michael Quintel, Annalen Bleckmann, Jan Florian Heuer
BACKGROUND: Recent clinical studies have not shown an overall benefit of high-frequency oscillatory ventilation (HFOV), possibly due to injurious or non-individualized HFOV settings. We compared conventional HFOV (HFOVcon ) settings with HFOV settings based on mean transpulmonary pressures (PLmean ) in an animal model of experimental acute respiratory distress syndrome (ARDS). METHODS: ARDS was induced in eight pigs by intrabronchial installation of hydrochloric acid (0...
May 9, 2018: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29743094/feasibility-and-safety-of-low-flow-extracorporeal-co-2-removal-managed-with-a-renal-replacement-platform-to-enhance-lung-protective-ventilation-of-patients-with-mild-to-moderate-ards
#18
Matthieu Schmidt, Samir Jaber, Elie Zogheib, Thomas Godet, Gilles Capellier, Alain Combes
BACKGROUND: Extracorporeal carbon-dioxide removal (ECCO2 R) might allow ultraprotective mechanical ventilation with lower tidal volume (VT) (< 6 ml/kg predicted body weight), plateau pressure (Pplat ) (< 30 cmH2 O), and driving pressure to limit ventilator-induced lung injury. This study was undertaken to assess the feasibility and safety of ECCO2 R managed with a renal replacement therapy (RRT) platform to enable very low tidal volume ventilation of patients with mild-to-moderate acute respiratory distress syndrome (ARDS)...
May 10, 2018: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29742448/linking-lung-function-to-structural-damage-of-alveolar-epithelium-in-ventilator-induced-lung-injury
#19
Katharine L Hamlington, Bradford J Smith, Celia M Dunn, Chantel M Charlebois, Gregory S Roy, Jason H T Bates
Understanding how the mechanisms of ventilator-induced lung injury (VILI), namely atelectrauma and volutrauma, contribute to the failure of the blood-gas barrier and subsequent intrusion of edematous fluid into the airspace is essential for the design of mechanical ventilation strategies that minimize VILI. We ventilated mice with different combinations of tidal volume and positive end-expiratory pressure (PEEP) and linked degradation in lung function measurements to injury of the alveolar epithelium observed via scanning electron microscopy...
May 6, 2018: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29741919/efficacy-of-acupuncture-treatment-for-improving-the-respiratory-status-in-patients-receiving-prolonged-mechanical-ventilation-in-intensive-care-units-a-retrospective-observational-study
#20
Jun Matsumoto-Miyazaki, Hiroaki Ushikoshi, Kodai Suzuki, Nagisa Miyazaki, Takahide Nawa, Hideshi Okada, Shozo Yoshida, Ichijiro Murata, Shinji Ogura, Shinya Minatoguchi
BACKGROUND AND OBJECTIVE: Patients in critical care settings often require prolonged mechanical ventilation (MV) therapy and, occasionally, they cannot be weaned from MV. The authors evaluated the efficacy of acupuncture treatment for improving the respiratory status and promoting successful weaning from prolonged MV in patients at intensive care units (ICUs). DESIGN: Retrospective observational study. SETTING: Gifu University Hospital, Gifu, Japan...
May 9, 2018: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
keyword
keyword
25542
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"