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Positive end expiratory pressure

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https://www.readbyqxmd.com/read/29769151/real-time-automated-detection-of-ventilator-associated-events-avoiding-missed-detections-misclassifications-and-false-detections-due-to-human-error
#1
Erica S Shenoy, Eric S Rosenthal, Yu-Ping Shao, Siddharth Biswal, Manohar Ghanta, Erin E Ryan, Dolores Suslak, Nancy Swanson, Valdery Moura Junior, David C Hooper, M Brandon Westover
OBJECTIVETo validate a system to detect ventilator associated events (VAEs) autonomously and in real time.DESIGNRetrospective review of ventilated patients using a secure informatics platform to identify VAEs (ie, automated surveillance) compared to surveillance by infection control (IC) staff (ie, manual surveillance), including development and validation cohorts.SETTINGThe Massachusetts General Hospital, a tertiary-care academic health center, during January-March 2015 (development cohort) and January-March 2016 (validation cohort)...
May 17, 2018: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/29765337/plethysmographic-loops-a-window-on-the-lung-pathophysiology-of-copd-patients
#2
Dejan Radovanovic, Matteo Pecchiari, Fabio Pirracchio, Camilla Zilianti, Edgardo D'Angelo, Pierachille Santus
Plethysmographic alveolar pressure-flow ( P alv - F ) loops contain potentially relevant information about the pathophysiology of chronic obstructive pulmonary disease (COPD), but no quantitative analysis of these loops during spontaneous breathing has ever been performed. The area of the loop's inspiratory ( A ins ) and expiratory portion ( A exp ), and the difference between the end-expiratory and end-inspiratory alveolar pressure (Δ P alv ) were measured in 20 young, 20 elderly healthy subjects, and 130 stable COPD patients...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29754942/dead-space-analysis-at-different-levels-of-positive-end-expiratory-pressure-in-acute-respiratory-distress-syndrome-patients
#3
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/29746600/impact-of-positive-end-expiratory-pressure-on-cerebral-hemodynamic-in-paediatric-patients-with-post-traumatic-brain-swelling-treated-by-surgical-decompression
#4
Silvia De Rosa, Gianluca Villa, Paola Franchi, Aldo Mancino, Federica Tosi, Marina Alessandra Martin, Simona Bazzano, Giorgio Conti, Silvia Maria Pulitanò
INTRODUCTION: The objective of our present study is to evaluate the impact of different PEEP levels on cerebral hemodynamic, gas exchanges and respiratory system mechanics in paediatric patients with post-traumatic brain swelling treated with decompressive craniectomy (DC). MATERIALS AND METHODS: A prospective physiologic study was carried out on 14 paediatric patients presenting with severe traumatic brain swelling treated with DC. Transcranial Doppler ultrasonography was performed on the middle cerebral artery bilaterally after DC...
2018: PloS One
https://www.readbyqxmd.com/read/29743121/high-frequency-oscillatory-ventilation-guided-by-transpulmonary-pressure-in-acute-respiratory-syndrome-an-experimental-study-in-pigs
#5
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/29742448/linking-lung-function-to-structural-damage-of-alveolar-epithelium-in-ventilator-induced-lung-injury
#6
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/29739430/relax-restricted-versus-liberal-positive-end-expiratory-pressure-in-patients-without-ards-protocol-for-a-randomized-controlled-trial
#7
Anna Geke Algera, Luigi Pisani, Dennis C J Bergmans, Sylvia den Boer, Corianne A J de Borgie, Frank H Bosch, Karina Bruin, Thomas G Cherpanath, Rogier M Determann, Arjen M Dondorp, Dave A Dongelmans, Henrik Endeman, Jasper J Haringman, Janneke Horn, Nicole P Juffermans, David M van Meenen, Nardo J van der Meer, Maruschka P Merkus, Hazra S Moeniralam, Ilse Purmer, Pieter Roel Tuinman, Mathilde Slabbekoorn, Peter E Spronk, Alexander P J Vlaar, Marcelo Gama de Abreu, Paolo Pelosi, Ary Serpa Neto, Marcus J Schultz, Frederique Paulus
BACKGROUND: Evidence for benefit of high positive end-expiratory pressure (PEEP) is largely lacking for invasively ventilated, critically ill patients with uninjured lungs. We hypothesize that ventilation with low PEEP is noninferior to ventilation with high PEEP with regard to the number of ventilator-free days and being alive at day 28 in this population.  METHODS/DESIGN: The "REstricted versus Liberal positive end-expiratory pressure in patients without ARDS" trial (RELAx) is a national, multicenter, randomized controlled, noninferiority trial in adult intensive care unit (ICU) patients with uninjured lungs who are expected not to be extubated within 24 h...
May 9, 2018: Trials
https://www.readbyqxmd.com/read/29734208/improved-lung-recruitment-and-oxygenation-during-mandatory-ventilation-with-a-new-expiratory-ventilation-assistance-device-a-controlled-interventional-trial-in-healthy-pigs
#8
Johannes Schmidt, Christin Wenzel, Marlene Mahn, Sashko Spassov, Heidi Cristina Schmitz, Silke Borgmann, Ziwei Lin, Jörg Haberstroh, Stephan Meckel, Sebastian Eiden, Steffen Wirth, Hartmut Buerkle, Stefan Schumann
BACKGROUND: In contrast to conventional mandatory ventilation, a new ventilation mode, expiratory ventilation assistance (EVA), linearises the expiratory tracheal pressure decline. OBJECTIVE: We hypothesised that due to a recruiting effect, linearised expiration oxygenates better than volume controlled ventilation (VCV). We compared the EVA with VCV mode with regard to gas exchange, ventilation volumes and pressures and lung aeration in a model of peri-operative mandatory ventilation in healthy pigs...
May 4, 2018: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29733073/a-50-a%C3%A3-os-de-la-descripci%C3%A3-n-del-s%C3%A3-ndrome-de-insuficiencia-respiratoria-aguda
#9
Raúl Carrillo-Esper, Gilberto Felipe Vázquez-De Anda, Cynthia Ivonne Mejía-Pérez, María Guadalupe Delaye-Aguilar, Ana Ivonne Pérez-Castañeda, Jesús Carlos Briones-Garduño, Manuel Antonio Díaz de León-Ponce
En 1967, Ashbaugh et al. publicaron en Lancet la descripción de una nueva entidad para la que acuñaron el nombre "síndrome de distress respiratorio del adulto". En ese artículo describieron minuciosamente a 12 enfermos que presentaban insuficiencia respiratoria, con infiltración pulmonar bilateral e hipoxemia resistente a oxigenoterapia. Para su manejo se hizo énfasis en la importancia de la intubación y la ventilación mecánica con presión positiva al final de la espiración. A 50 años de la publicación se han logrado grandes avances en el conocimiento de esta enfermedad, lo que ha influido en el manejo y supervivencia de los pacientes...
2018: Gaceta Médica de México
https://www.readbyqxmd.com/read/29728414/t-piece-resuscitators-how-do-they-compare
#10
Murray Hinder, Alistair McEwan, Thomas Drevhammer, Snorri Donaldson, Mark Brian Tracy
BACKGROUND: The T-piece resuscitator (TPR) has seen increased use as a primary resuscitation device with newborns. Traditional TPR design uses a high resistance expiratory valve to produce positive end expiratory pressure (PEEP) or continuous positive airway pressure (CPAP) at resuscitation. A new TPR device that uses a dual flow ratio valve (fluidic flip) to produce PEEP/CPAP is now available (rPAP). We aimed to compare the measured ventilation performance of different TPR devices in a controlled bench test study...
May 4, 2018: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/29721820/hypothermic-total-liquid-ventilation-after-experimental-aspiration-associated-acute-respiratory-distress-syndrome
#11
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/29720757/sono-anatomical-analysis-of-right-internal-jugular-vein-and-carotid-artery-at-different-levels-of-positive-end-expiratory-pressure-in-anaesthetised-paralysed-patients
#12
Girijapati Machanalli, Amar P Bhalla, Dalim Kumar Baidya, Devalina Goswami, Praveen Talawar, Rahul Kumar Anand
Background and Aims: Increasing the cross-sectional area (CSA) of the internal jugular vein (IJV) improves the success rate of cannulation and decreases complications. Application of positive end-expiratory pressure (PEEP) may increase the CSA of IJV beyond that achieved in Trendelenburg position. However, the optimum PEEP to achieve maximal increase in CSA of IJV and the effect of PEEP on IJV and CA relationship is not known. Methods: In this prospective, blinded, randomised controlled study, 120 anesthetised paralysed patients of the American Society of Anesthesiologists physical Status I-II were placed in 20° Trendelenburg position...
April 2018: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/29709437/the-effects-of-an-open-lung-approach-during-one-lung-ventilation-on-postoperative-pulmonary-complications-and-driving-pressure-a-descriptive-multicenter-national-study
#13
Javier Belda, Carlos Ferrando, Ignacio Garutti
OBJECTIVE: Thoracic surgical procedures are associated with an increased risk of postoperative pulmonary complications (PPCs), which seem to be related directly to intraoperative driving pressure. The authors conducted this study to describe the incidence of PPCs in patients in whom an individualized open-lung approach was applied during one-lung ventilation. DESIGN: This was a prospective, multicenter, national descriptive study. SETTING: Thoracic surgery patients undergoing one-lung ventilation...
March 27, 2018: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29708892/continuous-negative-abdominal-pressure-reduces-ventilator-induced-lung-injury-in-a-porcine-model
#14
Takeshi Yoshida, Doreen Engelberts, Gail Otulakowski, Bhushan Katira, Martin Post, Niall D Ferguson, Laurent Brochard, Marcelo B P Amato, Brian P Kavanagh
BACKGROUND: In supine patients with acute respiratory distress syndrome, the lung typically partitions into regions of dorsal atelectasis and ventral aeration ("baby lung"). Positive airway pressure is often used to recruit atelectasis, but often overinflates ventral (already aerated) regions. A novel approach to selective recruitment of dorsal atelectasis is by "continuous negative abdominal pressure." METHODS: A randomized laboratory study was performed in anesthetized pigs...
April 27, 2018: Anesthesiology
https://www.readbyqxmd.com/read/29707341/short-term-one-lung-ventilation-does-not-influence-local-inflammatory-cytokine-response-after-lung-resection
#15
Silvia Fiorelli, Veronica Defraia, Fabiola Cipolla, Cecilia Menna, Mohsen Ibrahim, Claudio Andreetti, Maurizio Simmaco, Monica Rocco, Erino Angelo Rendina, Marina Borro, Domenico Massullo
Background: One-lung ventilation (OLV) is a ventilation procedure used for pulmonary resection which may results in lung injury. The aim of this study was to evaluate the local inflammatory cytokine response from the dependent lung after OLV and its correlation to VT. The secondary aim was to evaluate the clinical outcome of each patient. Methods: Twenty-eight consecutive patients were enrolled. Ventilation was delivered in volume-controlled mode with a VT based on predicted body weight (PBW)...
March 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29705765/practice-of-ventilation-in-middle-income-countries-provent-imic-rationale-and-protocol-for-a-prospective-international-multicentre-observational-study-in-intensive-care-units-in-asia
#16
Luigi Pisani, Anna Geke Algera, Ary Serpa Neto, Areef Ahsan, Abigail Beane, Kaweesak Chittawatanarat, Abul Faiz, Rashan Haniffa, Reza Hashemian, Madiha Hashmi, Hisham Ahmed Imad, Kanishka Indraratna, Shivakumar Iyer, Gyan Kayastha, Bhuvana Krishna, Hassan Moosa, Behzad Nadjm, Rajyabardhan Pattnaik, Sriram Sampath, Louise Thwaites, Ni Ni Tun, Nor'azim Mohd Yunos, Salvatore Grasso, Frederique Paulus, Marcelo Gama de Abreu, Paolo Pelosi, Arjen M Dondorp, Marcus J Schultz
INTRODUCTION: Current evidence on epidemiology and outcomes of invasively mechanically ventilated intensive care unit (ICU) patients is predominantly gathered in resource-rich settings. Patient casemix and patterns of critical illnesses, and probably also ventilation practices are likely to be different in resource-limited settings. We aim to investigate the epidemiological characteristics, ventilation practices and clinical outcomes of patients receiving mechanical ventilation in ICUs in Asia...
April 28, 2018: BMJ Open
https://www.readbyqxmd.com/read/29705115/suction-mask-vs-conventional-mask-ventilation-in-term-and-near-term-infants-in-the-delivery-room-a-randomized-controlled-trial
#17
Laila Lorenz, Christoph M Rüegger, Eoin O'Currain, Jennifer A Dawson, Marta Thio, Louise S Owen, Susan M Donath, Peter G Davis, C Omar F Kamlin
OBJECTIVE: To compare the suction mask, a new facemask that uses suction to create a seal between the mask and the infant's face, with a conventional soft, round silicone mask during positive pressure ventilation (PPV) in the delivery room in newborn infants >34 weeks of gestation. STUDY DESIGN: Single-center randomized controlled trial in the delivery room. The primary outcome was mask leak. RESULTS: Forty-five infants were studied at a median gestational age of 38...
April 25, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29702711/acute-post-tracheostomy-clinical-decompensations-in-infants-are-there-predictive-markers
#18
Michael F Nyp, Jane B Taylor, Antonio Petralia, Alexandra Oschman, Mike Norberg, Robert A Weatherly, William Truog, Winston Manimtim
OBJECTIVE:  To report on the population of infants receiving a tracheostomy, identify acute post-tracheostomy clinical decompensations, and seek predictive markers associated with acute complications following the placement of a tracheostomy. STUDY DESIGN:  Retrospective deidentified clinical data was provided by the Infant Pulmonary Data Repository at Children's Mercy Hospital, Kansas City. Data from infants undergoing tracheostomy from January 1, 2008 through September 30, 2016 were divided into one of two study groups based on clinical correlations: (1) no acute decompensations within 72 hours post-tracheostomy or (2) acute clinical decompensation defined as sustained escalation of respiratory care within the 72 hours following tracheostomy...
April 27, 2018: American Journal of Perinatology
https://www.readbyqxmd.com/read/29692886/what-are-the-optimum-components-in-a-care-bundle-aimed-at-reducing-post-operative-pulmonary-complications-in-high-risk-patients
#19
Sophie V Griffiths, Daniel H Conway, Michael Sander, Ib Jammer, Michael P W Grocott, Ben C Creagh-Brown
Background: Post-operative pulmonary complications (POPC) are common, predictable and associated with increased morbidity and mortality, independent of pre-operative risk. Interventions to reduce the incidence of POPC have been studied individually, but the use of a care bundle has not been widely investigated. The purpose of our work was to use Delphi consensus methodology and an independently chosen expert panel to formulate a care bundle for patients identified as being at high of POPC, as preparation towards an evaluation of its effectiveness at reducing POPC...
2018: Perioperative Medicine
https://www.readbyqxmd.com/read/29688929/general-anesthetic-management-of-a-child-with-horseshoe-lung-and-left-lung-hypoplasia-for-cheiloplasty-a-case-report
#20
Aiji Sato Boku, Maki Morita, Haruko Ota, Yuji Kamimura, Hidekazu Ito, MinHye So, Tetsuya Tamura, Eisuke Kako, Jun Harada, Kazuya Sobue
Horseshoe lung is an extremely rare congenital malformation in which the right and left lungs are fused due to stenosis of the lung parenchyma. In anesthetic management, it is important to avoid hypoxemia and hypercapnia caused by a decline in lung capacity and functional residual capacity. A 3-year-old boy with horseshoe lung and left lung hypoplasia was scheduled to undergo cheiloplasty. Regarding respiratory management, to prevent hypoxemia and hypercapnia, we avoided intraoperative peripheral airway obstruction with positive end-expiratory pressure, set a long inspiratory phase time for sufficient alveolar expansion, and maintained sufficient gas exchange in lungs with low reserve capacity...
April 23, 2018: A&A practice
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