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alveolar recruitment maneuvers

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https://www.readbyqxmd.com/read/29112971/effects-of-positive-end-expiratory-pressure-and-recruitment-maneuvers-in-a-ventilator-induced-injury-mouse-model
#1
Laura A Cagle, Lisa M Franzi, Angela L Linderholm, Jerold A Last, Jason Y Adams, Richart W Harper, Nicholas J Kenyon
BACKGROUND: Positive-pressure mechanical ventilation is an essential therapeutic intervention, yet it causes the clinical syndrome known as ventilator-induced lung injury. Various lung protective mechanical ventilation strategies have attempted to reduce or prevent ventilator-induced lung injury but few modalities have proven effective. A model that isolates the contribution of mechanical ventilation on the development of acute lung injury is needed to better understand biologic mechanisms that lead to ventilator-induced lung injury...
2017: PloS One
https://www.readbyqxmd.com/read/28984091/repeated-alveolar-recruitment-maneuvers-with-and-without-positive-end-expiratory-pressure-during-bariatric-surgery-a-randomized-trial
#2
Ke Wei, Su Min, Jun Cao, Xuechao Hao, Jie Deng
BACKGROUND: Positive end-expiratory pressure (PEEP) is considered essential in protective ventilation, while may lead to hemodynamic impairment. In the present study, we investigated the effect of repeated alveolar recruitment maneuvers (ARMs) with or without additional PEEP on the arterial oxygenation of obese patients who were undergoing bariatric surgery. METHODS: Thirty-six obese adult patients with body mass index (BMI) >40 kg/m2 who were scheduled for laparoscopic sleeve gastrectomy were randomly allocated into three groups: (1) control group, no intraoperative ARMs; (2) ARM+ZEEP group, repeated ARMs every 30 minutes without extra PEEP; or (3) ARM+PEEP group, ARMs followed by 8 cm H2O of PEEP from the onset of pneumoperitoneum...
October 4, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28977263/does-the-use-of-high-peep-levels-prevent-ventilator-induced-lung-injury
#3
Guillermo Bugedo, Jaime Retamal, Alejandro Bruhn
Overdistention and intratidal alveolar recruitment have been advocated as the main physical mechanisms responsible for ventilator-induced lung injury. Limiting tidal volume has a demonstrated survival benefit in patients with acute respiratory distress syndrome and is recognized as the cornerstone of protective ventilation. In contrast, the use of high positive end-expiratory pressure levels in clinical trials has yielded conflicting results and remains controversial. In the present review, we will discuss the benefits and limitations of the open lung approach and will discuss some recent experimental and clinical trials on the use of high versus low/moderate positive end-expiratory pressure levels...
April 2017: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/28973363/effect-of-lung-recruitment-and-titrated-positive-end-expiratory-pressure-peep-vs-low-peep-on-mortality-in-patients-with-acute-respiratory-distress-syndrome-a-randomized-clinical-trial
#4
RANDOMIZED CONTROLLED TRIAL
Alexandre Biasi Cavalcanti, Érica Aranha Suzumura, Ligia Nasi Laranjeira, Denise de Moraes Paisani, Lucas Petri Damiani, Helio Penna Guimarães, Edson Renato Romano, Marisa de Moraes Regenga, Luzia Noriko Takahashi Taniguchi, Cassiano Teixeira, Roselaine Pinheiro de Oliveira, Flavia Ribeiro Machado, Fredi Alexander Diaz-Quijano, Meton Soares de Alencar Filho, Israel Silva Maia, Eliana Bernardete Caser, Wilson de Oliveira Filho, Marcos de Carvalho Borges, Priscilla de Aquino Martins, Mirna Matsui, Gustavo Adolfo Ospina-Tascón, Thiago Simões Giancursi, Nelson Dario Giraldo-Ramirez, Silvia Regina Rios Vieira, Maria da Graça Pasquotto de Lima Assef, Mohd Shahnaz Hasan, Wojciech Szczeklik, Fernando Rios, Marcelo Britto Passos Amato, Otávio Berwanger, Carlos Roberto Ribeiro de Carvalho
Importance: The effects of recruitment maneuvers and positive end-expiratory pressure (PEEP) titration on clinical outcomes in patients with acute respiratory distress syndrome (ARDS) remain uncertain. Objective: To determine if lung recruitment associated with PEEP titration according to the best respiratory-system compliance decreases 28-day mortality of patients with moderate to severe ARDS compared with a conventional low-PEEP strategy. Design, Setting, and Participants: Multicenter, randomized trial conducted at 120 intensive care units (ICUs) from 9 countries from November 17, 2011, through April 25, 2017, enrolling adults with moderate to severe ARDS...
October 10, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28967439/new-evidence-in-one-lung-ventilation
#5
H Meleiro, I Correia, P Charco Mora
Mechanical ventilation in thoracic surgery has undergone significant changes in recent years due to the implementation of the protective ventilation. This review will analyze recent ventilatory strategies in one-lung ventilation. A MEDLINE research was performed using Mesh term "One-Lung Ventilation" including randomized clinical trials, metanalysis, reviews and systematic reviews published in the last 6 years. Search was performed on 21st March 2017. A total of 75 articles were initially found. After title and abstract review 14 articles were included...
September 26, 2017: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/28961282/physiologic-effects-of-alveolar-recruitment-and-inspiratory-pauses-during-moderately-high-frequency-ventilation-delivered-by-a-conventional-ventilator-in-a-severe-lung-injury-model
#6
Ricardo Luiz Cordioli, Eduardo Leite Vieira Costa, Luciano Cesar Pontes Azevedo, Susimeire Gomes, Marcelo Britto Passos Amato, Marcelo Park
BACKGROUND AND AIMS: To investigate whether performing alveolar recruitment or adding inspiratory pauses could promote physiologic benefits (VT) during moderately-high-frequency positive pressure ventilation (MHFPPV) delivered by a conventional ventilator in a porcine model of severe acute respiratory distress syndrome (ARDS). METHODS: Prospective experimental laboratory study with eight pigs. Induction of acute lung injury with sequential pulmonary lavages and injurious ventilation was initially performed...
2017: PloS One
https://www.readbyqxmd.com/read/28888803/effects-of-pneumoperitoneum-and-of-an-alveolar-recruitment-maneuver-followed-by-positive-end-expiratory-pressure-on-cardiopulmonary-function-in-sheep-anesthetized-with-isoflurane-fentanyl
#7
Jéssica C Rodrigues, Francisco J Teixeira-Neto, Sofia A Cerejo, Nathalia Celeita-Rodríguez, Natache A Garofalo, Juliany G Quitzan, Thalita L A Rocha
OBJECTIVE: To investigate the effects of pneumoperitoneum alone or combined with an alveolar recruitment maneuver (ARM) followed by positive end-expiratory pressure (PEEP) on cardiopulmonary function in sheep. STUDY DESIGN: Prospective, randomized, crossover study. ANIMALS: A total of nine adult sheep (36-52 kg). METHODS: Sheep were administered three treatments (≥10-day intervals) during isoflurane-fentanyl anesthesia and volume-controlled ventilation (tidal volume: 12 mL kg(-1)) with oxygen: CONTROL (no intervention); PNEUMO (120 minutes of CO2 pneumoperitoneum); PNEUMOARM/PEEP (PNEUMO protocol with an ARM instituted after 60 minutes of pneumoperitoneum)...
June 7, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28828365/recruitment-maneuvers-in-acute-respiratory-distress-syndrome
#8
REVIEW
Jean-Michel Constantin, Thomas Godet, Matthieu Jabaudon, Jean-Etienne Bazin, Emmanuel Futier
The rationale for the use of recruitment maneuvers (RMs) in acute respiratory distress syndrome (ARDS) is to promote alveolar recruitment, leading to an increased end-expiratory lung volume and thus decreased ventilator-induced lung injury (VILI). RMs consists of a transient increase in transpulmonary pressure that can re-open previously collapsed alveoli. RMs represents a physiological response to lung aggression in different conditions by re-opening the collapsed part of the lung and decreasing lung oedema...
July 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28800778/effects-of-intraoperative-peep-optimization-on-postoperative-pulmonary-complications-and-the-inflammatory-response-study-protocol-for-a-randomized-controlled-trial
#9
Zoltán Ruszkai, Erika Kiss, Ildikó László, Fanni Gyura, Erika Surány, Péter Töhötöm Bartha, Gergely Péter Bokrétás, Edit Rácz, István Buzogány, Zoltán Bajory, Erzsébet Hajdú, Zsolt Molnár
BACKGROUND: Patients undergoing general anesthesia and mechanical ventilation during major abdominal surgery commonly develop pulmonary atelectasis and/or hyperdistention of the lungs. Recent studies show benefits of lung-protective mechanical ventilation with the use of low tidal volumes, a moderate level of positive end-expiratory pressure (PEEP) and regular alveolar recruitment maneuvers during general anesthesia, even in patients with healthy lungs. The purpose of this clinical trial is to evaluate the effects of intraoperative lung-protective mechanical ventilation, using individualized PEEP values, on postoperative pulmonary complications and the inflammatory response...
August 11, 2017: Trials
https://www.readbyqxmd.com/read/28759484/impact-of-different-ventilation-strategies-on-driving-pressure-mechanical-power-and-biological-markers-during-open-abdominal-surgery-in-rats
#10
Lígia de A Maia, Cynthia S Samary, Milena V Oliveira, Cintia L Santos, Robert Huhle, Vera L Capelozzi, Marcelo M Morales, Marcus J Schultz, Marcelo G Abreu, Paolo Pelosi, Pedro L Silva, Patricia Rieken Macedo Rocco
BACKGROUND: Intraoperative mechanical ventilation may yield lung injury. To date, there is no consensus regarding the best ventilator strategy for abdominal surgery. We aimed to investigate the impact of the mechanical ventilation strategies used in 2 recent trials (Intraoperative Protective Ventilation [IMPROVE] trial and Protective Ventilation using High versus Low PEEP [PROVHILO] trial) on driving pressure (ΔPRS), mechanical power, and lung damage in a model of open abdominal surgery...
October 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28746224/alveolar-recruitment-maneuver-attenuates-extravascular-lung-water-in-acute-respiratory-distress-syndrome
#11
RANDOMIZED CONTROLLED TRIAL
Fu-Tsai Chung, Chung-Shu Lee, Shu-Min Lin, Chih-Hsi Kuo, Tsai-Yu Wang, Yueh-Fu Fang, Meng-Heng Hsieh, Hao-Cheng Chen, Horng-Chyuan Lin
BACKGROUND: The alveolar recruitment maneuver (RM) has been reported to improve oxygenation in acute respiratory distress syndrome (ARDS) and may be related to reduced extravascular lung water (EVLW) in animals. This study was designed to investigate the effects of RM on EVLW in patients with ARDS. METHODS: An open label, prospective, randomized controlled trial including patients with ARDS was conducted in hospitals in North Taiwan between 2010 and 2016. The patients were divided into 2 groups (with and without RM)...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28730554/bedside-selection-of-positive-end-expiratory-pressure-by-electrical-impedance-tomography-in-hypoxemic-patients-a-feasibility-study
#12
Nilde Eronia, Tommaso Mauri, Elisabetta Maffezzini, Stefano Gatti, Alfio Bronco, Laura Alban, Filippo Binda, Tommaso Sasso, Cristina Marenghi, Giacomo Grasselli, Giuseppe Foti, Antonio Pesenti, Giacomo Bellani
BACKGROUND: Positive end-expiratory pressure (PEEP) is a key element of mechanical ventilation. It should optimize recruitment, without causing excessive overdistension, but controversy exists on the best method to set it. The purpose of the study was to test the feasibility of setting PEEP with electrical impedance tomography in order to prevent lung de-recruitment following a recruitment maneuver. We enrolled 16 patients undergoing mechanical ventilation with PaO2/FiO2 <300 mmHg...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28604996/one-lung-ventilation-for-thoracic-surgery-current-perspectives
#13
Filippo Bernasconi, Federico Piccioni
One-lung ventilation (OLV) is an anesthesiological technique that is increasingly being used beyond thoracic surgery. This requires specific skills and knowledge about airway management, maintenance of gas exchange and prevention of acute lung injury. Sometimes maintaining adequate gas exchange and minimizing acute lung injury may be opposing processes. Parameters validated for OLV titration still have not been found, but a multimodal approach based on low tidal volume, end-expiratory pressure application and alveolar recruitment maneuvers is considered the best way to ensure protective ventilation and reduce lung damage...
June 7, 2017: Tumori
https://www.readbyqxmd.com/read/28457827/ventilation-distribution-assessed-with-electrical-impedance-tomography-and-the-influence-of-tidal-volume-recruitment-and-positive-end-expiratory-pressure-in-isoflurane-anesthetized-dogs
#14
Aline M Ambrosio, Tatiana P A Carvalho-Kamakura, Keila K Ida, Barbara Varela, Felipe S R M Andrade, Lara L Facó, Denise T Fantoni
OBJECTIVE: To examine the intrapulmonary gas distribution of low and high tidal volumes (VT) and to investigate whether this is altered by an alveolar recruitment maneuver (ARM) and 5 cmH2O positive end-expiratory pressure (PEEP) during anesthesia. STUDY DESIGN: Prospective randomized clinical study. ANIMALS: Fourteen client-owned bitches weighing 26 ± 7 kg undergoing elective ovariohysterectomy. METHODS: Isoflurane-anesthetized dogs in dorsal recumbency were ventilated with 0 cmH2O PEEP and pressure-controlled ventilation by adjusting the peak inspiratory pressure (PIP) to achieve a low (7 mL kg(-1); n = 7) or a high (12 mL kg(-1); n = 7) VT...
March 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28342045/effects-of-an-alveolar-recruitment-maneuver-on-subdural-pressure-brain-swelling-and-mean-arterial-pressure-in-patients-undergoing-supratentorial-tumour-resection-a-randomized-crossover-study
#15
Alana M Flexman, Peter A Gooderham, Donald E Griesdale, Ruth Argue, Brian Toyota
PURPOSE: Although recruitment maneuvers have been advocated as part of a lung protective ventilation strategy, their effects on cerebral physiology during elective neurosurgery are unknown. Our objectives were to determine the effects of an alveolar recruitment maneuver on subdural pressure (SDP), brain relaxation score (BRS), and cerebral perfusion pressure among patients undergoing supratentorial tumour resection. METHODS: In this prospective crossover study, patients scheduled for resection of a supratentorial brain tumour were randomized to undergo either a recruitment maneuver (30 cm of water for 30 sec) or a "sham" maneuver (5 cm of water for 30 sec), followed by the alternative intervention after a 90-sec equilibration period...
June 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28178996/hemodynamic-effects-of-lung-recruitment-maneuvers-in-acute-respiratory-distress-syndrome
#16
Anup Das, Mainul Haque, Marc Chikhani, Oana Cole, Wenfei Wang, Jonathan G Hardman, Declan G Bates
BACKGROUND: Clinical trials have, so far, failed to establish clear beneficial outcomes of recruitment maneuvers (RMs) on patient mortality in acute respiratory distress syndrome (ARDS), and the effects of RMs on the cardiovascular system remain poorly understood. METHODS: A computational model with highly integrated pulmonary and cardiovascular systems was configured to replicate static and dynamic cardio-pulmonary data from clinical trials. Recruitment maneuvers (RMs) were executed in 23 individual in-silico patients with varying levels of ARDS severity and initial cardiac output...
February 8, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28108076/safety-and-effectiveness-of-alveolar-recruitment-maneuvers-and-positive-end-expiratory-pressure-during-general-anesthesia-for-cesarean-section-a-prospective-randomized-trial
#17
D Aretha, F Fligou, P Kiekkas, C Messini, E Panteli, E Zintzaras, M Karanikolas
INTRODUCTION: During cesarean section, the supine position reduces functional residual capacity and worsens lung compliance. We tested the hypothesis that alveolar recruitment maneuvers and positive end-expiratory pressure improve lung compliance in women undergoing general anesthesia for cesarean section. METHODS: Ninety women undergoing cesarean section were randomly assigned to one of two groups in a prospective, double-blind trial. In the alveolar recruitment maneuver group, pressure-control ventilation was used and inspiratory time was increased to 50% after delivery; positive end-expiratory pressure was increased to 20cmH2O and peak airway inspiratory pressure gradually increased to 45-50cmH2O...
May 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28099321/preoxygenation-physiologic-basis-benefits-and-potential-risks
#18
REVIEW
Usharani Nimmagadda, M Ramez Salem, George J Crystal
Preoxygenation before anesthetic induction and tracheal intubation is a widely accepted maneuver, designed to increase the body oxygen stores and thereby delay the onset of arterial hemoglobin desaturation during apnea. Because difficulties with ventilation and intubation are unpredictable, the need for preoxygenation is desirable in all patients. During emergence from anesthesia, residual effects of anesthetics and inadequate reversal of neuromuscular blockade can lead to hypoventilation, hypoxemia, and loss of airway patency...
February 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27805443/use-of-manual-alveolar-recruitment-maneuvers-to-eliminate-atelectasis-artifacts-identified-during-thoracic-computed-tomography-of-healthy-neonatal-foals
#19
Kara M Lascola, Stuart C Clark-Price, Stephen K Joslyn, Mark A Mitchell, Robert T O'Brien, Susan K Hartman, Kevin H Kline
OBJECTIVE To evaluate use of single manual alveolar recruitment maneuvers (ARMs) to eliminate atelectasis during CT of anesthetized foals. ANIMALS 6 neonatal Standardbred foals. PROCEDURES Thoracic CT was performed on spontaneously breathing anesthetized foals positioned in sternal (n = 3) or dorsal (3) recumbency when foals were 24 to 36 hours old (time 1), 4 days old (time 2), 7 days old (time 3), and 10 days old (time 4). The CT images were collected without ARMs (all times) and during ARMs with an internal airway pressure of 10, 20, and 30 cm H2O (times 2 and 3)...
November 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27334879/volumetric-capnography-lessons-from-the-past-and-current-clinical-applications
#20
REVIEW
Sara Verscheure, Paul B Massion, Franck Verschuren, Pierre Damas, Sheldon Magder
Dead space is an important component of ventilation-perfusion abnormalities. Measurement of dead space has diagnostic, prognostic and therapeutic applications. In the intensive care unit (ICU) dead space measurement can be used to guide therapy for patients with acute respiratory distress syndrome (ARDS); in the emergency department it can guide thrombolytic therapy for pulmonary embolism; in peri-operative patients it can indicate the success of recruitment maneuvers. A newly available technique called volumetric capnography (Vcap) allows measurement of physiological and alveolar dead space on a regular basis at the bedside...
June 23, 2016: Critical Care: the Official Journal of the Critical Care Forum
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