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Lung protective mechanical ventilation

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https://www.readbyqxmd.com/read/29933268/variable-ventilation-associated-with-recruitment-maneuver-minimizes-tissue-damage-and-pulmonary-inflammation-in-anesthetized-lung-healthy-rats
#1
Luciana Moisés Camilo, Gabriel Casulari Motta-Ribeiro, Mariana Barcellos de Ávila, Luis Felipe Santos Cruz Paula, Mariana Boechat de Abreu, Alysson Roncally Carvalho, Walter Araujo Zin
BACKGROUND: Recruitment maneuver and positive end-expiratory pressure (PEEP) can be used to counteract intraoperative anesthesia-induced atelectasis. Variable ventilation can stabilize lung mechanics by avoiding the monotonic tidal volume and protect lung parenchyma as tidal recruitment is encompassed within the tidal volume variability. METHODS: Forty-nine (7 per group) male Wistar rats were anesthetized, paralyzed, and mechanically ventilated. A recruitment maneuver followed by stepwise decremental PEEP titration was performed while continuously estimating respiratory system mechanics using recursive least squares...
June 20, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29920361/wisp-3-ccn6-inhibits-apoptosis-by-regulating-caspase-pathway-after-hyperoxia-in-lung-epithelial-cells
#2
Shuquan Wei, Kangwei Wang, Zhuxiang Zhao, Xiaomei Huang, Wanna Tang, Ziwen Zhao
Cell death is a normal phenomenon in the course of biological development, moreover, which is also a prominent feature in lung exposed to hyperoxia. Severe hypoxia occurs in ALI/ARDS patients, who generally require high concentration oxygen therapy assisted by mechanical ventilation. Nevertheless, high oxygen can cause excessive reactive oxygen species (ROS), leading to apoptosis in lung epithelial cells, which has been reported in our previous study. Herein, the correlation between increments of ROS and CCN6 expression was negative in CCN6-mediated the mitochondria dependent, intrinsic apoptotic pathway...
June 16, 2018: Gene
https://www.readbyqxmd.com/read/29917290/hypoxic-pulmonary-vasoconstriction-in-isolated-mouse-pulmonary-arterial-vessels
#3
Ievgen Strielkov, Nicole Catherine Krause, Natasha Sommer, Ralph Theo Schermuly, Hossein Ardeschir Ghofrani, Friedrich Grimminger, Thomas Gudermann, Alexander Dietrich, Norbert Weissmann
NEW FINDINGS: What is the central question of this study? Hypoxic pulmonary vasoconstriction has never been characterized in isolated mouse pulmonary arteries of different generations in detail. What is the main finding and its importance? We found that only small intrapulmonary arteries (80 - 200 μm in diameter) exhibit hypoxic pulmonary vasoconstriction. The observed response was sustained, significantly potentiated by depolarization-induced preconstriction, and not dependent on endothelium and TRPC6 channels...
June 19, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29907082/paravertebral-dexmedetomidine-as-an-adjuvant-to-ropivacaine-protects-against-independent-lung-injury-during-one-lung-ventilation-a-preliminary-randomized-clinical-trial
#4
Wei Zhang, Shanfeng Zhang, Bing Li, Mingyang Sun, Jiaqiang Zhang
BACKGROUND: To investigate the effect of paravertebral dexmedetomidine as an adjuvant to ropivacaine on independent lung injury during one-lung ventilation. METHODS: In total, 120 patients who underwent elective radical resection of pulmonary carcinoma were randomly assigned to one of six groups (n = 20): normal saline (C group), ropivacaine (R group), intravenous dexmedetomidine (Div group), 0.5 μg/kg paravertebral dexmedetomidine as an adjuvant to ropivacaine (RD0...
June 15, 2018: BMC Anesthesiology
https://www.readbyqxmd.com/read/29898436/endotracheal-intubation-and-in-hospital-mortality-after-intracerebral-hemorrhage
#5
Vasileios-Arsenios Lioutas, Sarah Marchina, Louis R Caplan, Magdy Selim, Joseph Tarsia, Luciana Catanese, Jonathan Edlow, Sandeep Kumar
BACKGROUND: Many patients with acute intracerebral hemorrhages (ICHs) undergo endotracheal intubation with subsequent mechanical ventilation (MV) for "airway protection" with the intent to prevent aspiration, pneumonias, and its related mortality. Conversely, these procedures may independently promote pneumonia, laryngeal trauma, dysphagia, and adversely affect patient outcomes. The net benefit of intubation and MV in this patient cohort has not been systematically investigated...
June 13, 2018: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/29862257/alternative-and-natural-therapies-for-acute-lung-injury-and-acute-respiratory-distress-syndrome
#6
REVIEW
Vipul J Patel, Sreeja Biswas Roy, Hiren J Mehta, Myungsoo Joo, Ruxana T Sadikot
Introduction: Acute respiratory distress syndrome (ARDS) is a complex clinical syndrome characterized by acute inflammation, microvascular damage, and increased pulmonary vascular and epithelial permeability, frequently resulting in acute respiratory failure and death. Current best practice for ARDS involves "lung-protective ventilation," which entails low tidal volumes and limiting the plateau pressures in mechanically ventilated patients. Although considerable progress has been made in understanding the pathogenesis of ARDS, little progress has been made in the development of specific therapies to combat injury and inflammation...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29793604/influence-of-xenon-on-pulmonary-mechanics-and-lung-aeration-in-patients-with-healthy-lungs
#7
M S Schaefer, T A Treschan, J Gauch, M Neukirchen, P Kienbaum
BACKGROUND: The anaesthetic xenon shows potent organ-protective properties. Due to high density and dynamic viscosity, peak inspiratory pressure (Pmax ) increases during xenon application. Thus, barotrauma may counteract organ protection. Accordingly, we investigated the influence of xenon on lung mechanics and lung aeration in patients with normal and reduced thoracic wall compliance. METHODS: After registration and ethical approval, 20 patients free of pulmonary disease undergoing routine xenon-based anaesthesia were mechanically ventilated...
June 2018: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29790144/-prone-position-and-nursing-care
#8
Shu-Ju Lu, Shiao-Pei Wang
Acute respiratory distress syndrome (ARDS) is a life-threatening disease, as acute inflammation in the lungs typically leads to hypoxia and symptoms of dyspnea. The treatment modalities of ARDS include mechanical ventilation, corticosteroid, extracorporeal membranous oxygenation, inhaled nitrogen oxide, and the prone position. Among these, the prone position is supported by evidence showing significantly reduced mortality in patients that adopt this modality. Lying in the prone position reduces atelectatic lung volumes by recruitment of dependent parts and facilitates normal regulation of alveolar ventilation, giving better-matched ventilation perfusion and, thus, improved oxygenation...
June 2018: Hu Li za Zhi the Journal of Nursing
https://www.readbyqxmd.com/read/29787304/deterioration-of-regional-lung-strain-and-inflammation-during-early-lung-injury
#9
Gabriel C Motta-Ribeiro, Soshi Hashimoto, Tilo Winkler, Rebecca M Baron, Kira Grogg, Luís F S C Paula, Arnoldo Santos, Congli Zeng, Kathryn Hibbert, Robert S Harris, Ednan Bajwa, Marcos F Vidal Melo
RATIONALE: The contribution of aeration heterogeneity to lung injury during early mechanical ventilation of uninjured lungs is unknown. OBJECTIVE: Test the hypotheses that a strategy consistent with clinical practice does not protect from worsening in lung strains during the first 24h of ventilation of initially normal lungs exposed to mild systemic endotoxemia in supine versus prone position, and that local neutrophilic inflammation is associated with local strain and blood volume at global strains below a proposed injurious threshold...
May 22, 2018: American Journal of Respiratory and Critical Care Medicine
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
#10
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/29764547/-comparison-of-lung-protection-for-hydrochloric-acid-or-oleic-acid-induced-rat-acute-respiratory-distress-syndrome-models-pretreated-with-penehyclidine
#11
Yumei Cheng, Zhou Yang, Feng Shen, Bo Liu, Yahui Wang, Yanqi Wu, Ling Yao, Yuqing Liu
OBJECTIVE: To compare the lung protection roles of intraperitoneal pre-injection with penehyclidine for two kinds of rat models with pulmonary and extrapulmonary acute respiratory distress syndrome (ARDSp and ARDSexp). METHODS: Forty healthy adult Sprague-Dawley (SD) rats were randomly divided into five groups (each n = 8): the rats in sham group received only tracheotomy; the ARDS rat models were reproduced by intratracheal inhalation of 0.1 mol/L hydrochloric acid (HCl) 2 mL/kg to simulate ARDSexp (HCl group) and 0...
May 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/29754942/dead-space-analysis-at-different-levels-of-positive-end-expiratory-pressure-in-acute-respiratory-distress-syndrome-patients
#12
Emiliano Gogniat, Marcela Ducrey, José Dianti, Matías Madorno, Nicolás Roux, Alejandro Midley, Julio Raffo, Sergio Giannasi, Eduardo San Roman, Fernando Suarez-Sipmann, Gerardo Tusman
PURPOSE: To analyze the effects of positive end-expiratory pressure (PEEP) on Bohr's dead space (VDBohr /VT) in patients with acute respiratory distress syndrome (ARDS). MATERIAL AND METHODS: Fourteen ARDS patients under lung protective ventilation settings were submitted to 4 different levels of PEEP (0, 6, 10, 16 cmH2 O). Respiratory mechanics, hemodynamics and volumetric capnography were recorded at each protocol step. RESULTS: Two groups of patients responded differently to PEEP when comparing baseline with 16-PEEP: those in which driving pressure increased > 15% (∆P˃15% , n = 7, p = ...
June 2018: Journal of Critical Care
https://www.readbyqxmd.com/read/29750051/angiotensin-ii-type-2-receptor-agonist-compound-21-attenuates-pulmonary-inflammation-in-a-model-of-acute-lung-injury
#13
Mario Menk, Jan Adriaan Graw, Clarissa von Haefen, Hendrik Steinkraus, Burkhard Lachmann, Claudia D Spies, David Schwaiberger
Purpose: Although the role of the angiotensin II type 2 (AT2) receptor in acute lung injury is not yet completely understood, a protective role of this receptor subtype has been suggested. We hypothesized that, in a rodent model of acute lung injury, stimulation of the AT2 receptor with the direct agonist Compound 21 (C21) might have a beneficial effect on pulmonary inflammation and might improve pulmonary gas exchange. Materials and methods: Male adult rats were divided into a treatment group that received pulmonary lavage followed by mechanical ventilation (LAV, n=9), a group receiving pulmonary lavage, mechanical ventilation, and direct stimulation of the AT2 receptor with C21 (LAV+C21, n=9), and a control group that received mechanical ventilation only (control, n=9)...
2018: Journal of Inflammation Research
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
#14
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/29732188/weaning-from-veno-venous-extracorporeal-membrane-oxygenation-how-i-do-it
#15
REVIEW
Lars M Broman, Maximilian V Malfertheiner, Andrea Montisci, Federico Pappalardo
Veno-venous extracorporeal membrane oxygenation (VV ECMO) is a rescue treatment for acute respiratory distress syndrome (ARDS) failing protective mechanical ventilation. It temporarily provides proper gas exchange: hypoxia is treated by adjusting the blood flow rate and fraction in spired oxygen over the ventilator (FiO2 ) on the extracorporeal membrane oxygenation (ECMO) circuit while CO2 removal is regulated by the ECMO fresh gas flow. Therefore, ventilator settings can be gradually reduced allowing the lungs to rest and recover...
March 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29723923/a-humidifier-in-the-invasive-mode-during-noninvasive-respiratory-support-could-increase-condensation-and-thereby-impair-airway-patency
#16
Rutger C Flink, Anton H van Kaam, Frans H de Jongh
AIM: Humidifying noninvasively ventilated preterm infants is critical to prevent dehydration of respiratory mucosa, but over-humidification can result in impaired airway patency and lung mechanics. This neonatal bench study investigated the humidity delivered using invasive and noninvasive humidification modes during nasal continuous positive airway pressure. METHODS: The study was conducted at the neonatal intensive care unit of Emma Children's Hospital, the Netherlands, in March 2014...
May 3, 2018: Acta Paediatrica
https://www.readbyqxmd.com/read/29721820/hypothermic-total-liquid-ventilation-after-experimental-aspiration-associated-acute-respiratory-distress-syndrome
#17
Jérôme Rambaud, Fanny Lidouren, Michaël Sage, Matthias Kohlhauer, Mathieu Nadeau, Étienne Fortin-Pellerin, Philippe Micheau, Luca Zilberstein, Nicolas Mongardon, Jean-Damien Ricard, Megumi Terada, Patrick Bruneval, Alain Berdeaux, Bijan Ghaleh, Hervé Walti, Renaud Tissier
BACKGROUND: Ultrafast cooling by total liquid ventilation (TLV) provides potent cardio- and neuroprotection after experimental cardiac arrest. However, this was evaluated in animals with no initial lung injury, whereas out-of-hospital cardiac arrest is frequently associated with early-onset pneumonia, which may lead to acute respiratory distress syndrome (ARDS). Here, our objective was to determine whether hypothermic TLV could be safe or even beneficial in an aspiration-associated ARDS animal model...
May 2, 2018: Annals of Intensive Care
https://www.readbyqxmd.com/read/29702725/effects-of-the-kv7-voltage-activated-potassium-channel-inhibitor-linopirdine-in-rat-models-of-haemorrhagic-shock
#18
Sean P Nassoiy, Favin S Babu, Heather M LaPorte, Kenneth L Byron, Matthias Majetschak
Recently, we demonstrated that Kv7 voltage-activated potassium channel inhibitors reduce fluid resuscitation requirements in short-term rat models of haemorrhagic shock. The aim of the present study was to further delineate the therapeutic potential and side effect profile of the Kv7 channel blocker linopirdine in various rat models of severe haemorrhagic shock over clinically relevant time periods. Intravenous administration of linopirdine, either before (1 or 3 mg/kg) or after (3 mg/kg) a 40% blood volume haemorrhage, did not affect blood pressure and survival in lethal haemorrhage models without fluid resuscitation...
April 27, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29691422/pulmonary-effects-of-adjusting-tidal-volume-to-actual-or-ideal-body-weight-in-ventilated-obese-mice
#19
Elise Guivarch, Guillaume Voiriot, Anahita Rouzé, Stéphane Kerbrat, Jeanne Tran Van Nhieu, Philippe Montravers, Bernard Maitre, Armand Mekontso Dessap, Mathieu Desmard, Jorge Boczkowski
Obese patients could be more susceptible to mechanical ventilation (MV)-induced lung injury than non-obese patients due to weight-dependent changes in lung properties. The aim of this study was therefore to evaluate the pulmonary effects of 2 hours low VT MV in a diet-induced obese mice model, with VT calculated on either the actual body weight (VT aw) or the ideal body weight (VT iw) . First, we hypothesized that a MV with VT aw would be associated with altered lung mechanics and an increased lung inflammation...
April 24, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29684318/does-size-matter-when-calculating-the-correct-tidal-volume-for-pediatric-mechanical-ventilation-a-hypothesis-based-on-fvc
#20
Gina J Kim, Christopher J L Newth, Robinder G Khemani, Suzy L Wong, Allan L Coates, Patrick A Ross
BACKGROUND: Tidal volumes standardized to predicted body weight are recommended for adult mechanical ventilation, but children are frequently ventilated by using measured body weight. The goal of this study was to examine the difference in FVC (in milliliters per kilogram [mL/kg]) by using measured body weight compared with predicted body weight in children. METHODS: This retrospective analysis included outpatient pulmonary function tests (PFTs) from two datasets...
April 22, 2018: Chest
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