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alveolar recruitment maneuvers

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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
#1
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
#2
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
https://www.readbyqxmd.com/read/27310989/application-of-co2-waveform-in-the-alveolar-recruitment-maneuvers-of-hypoxemic-patients-during-one-lung-ventilation
#3
Chunshan Dong, Junma Yu, Qi Liu, Chao Wu, Yao Lu
Deterioration of gas exchange during one-lung ventilation (OLV) is caused by both total collapse of the nondependent lung and partial collapse of the dependent lung. Alveolar recruitment maneuver improves lung function during general anesthesia. The objective of this study was to investigate whether there is an indirect relationship between the changes of CO2 expirogram and the selective lung recruitment. To further improve the oxygenation and gas exchange, we compare adjust setting of ventilated parameters based on CO2 expirogram and a preset setting of ventilated parameters during OLV in patients undergoing right-side thoracic surgery...
June 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27152255/efficacy-of-prone-position-in-acute-respiratory-distress-syndrome-patients-a-pathophysiology-based-review
#4
REVIEW
Vasilios Koulouras, Georgios Papathanakos, Athanasios Papathanasiou, Georgios Nakos
Acute respiratory distress syndrome (ARDS) is a syndrome with heterogeneous underlying pathological processes. It represents a common clinical problem in intensive care unit patients and it is characterized by high mortality. The mainstay of treatment for ARDS is lung protective ventilation with low tidal volumes and positive end-expiratory pressure sufficient for alveolar recruitment. Prone positioning is a supplementary strategy available in managing patients with ARDS. It was first described 40 years ago and it proves to be in alignment with two major ARDS pathophysiological lung models; the "sponge lung" - and the "shape matching" -model...
May 4, 2016: World Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/27130402/comparison-of-etview%C3%A2-tracheoscopic-ventilation-tube-and-video-assisted-fiberoptic-bronchoscopy-during-percutaneous-dilatational-tracheostomy
#5
Tarik Umutoglu, Mefkur Bakan, Ufuk Topuz, Sinan Yilmaz, Kadir Idin, Selcuk Alver, Erdogan Ozturk, Ziya Salihoglu
Fiberoptic bronchoscopy (FOB) via endotracheal tube (ETT) is the most frequent utilized technique for monitoring of percutaneous dilatational tracheostomy (PDT) procedure while maintaining mechanical ventilation. Endoscopic guidance has increased the safety of this procedure; nevertheless, the use of a bronchoscope via ETT potentially may deteriorate ventilation and lead to hypercarbia and/or hypoxia. EtView tracheoscopic ventilation tube (EtView TVT) is a standard endotracheal tube with a camera and light source embedded at the tip...
April 29, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27018314/elevated-plasma-levels-of-srage-are-associated-with-non-focal-ct-based-lung-imaging-in-ards-patients-a-prospective-multicenter-study
#6
Segolene Mrozek, Matthieu Jabaudon, Samir Jaber, Catherine Paugam-Burtz, Jean-Yves Lefrant, Jean-Jacques Rouby, Karim Asehnoune, Bernard Allaouchiche, Olivier Baldesi, Marc Leone, Qin Lu, Jean-Etienne Bazin, Laurence Roszyk, Vincent Sapin, Emmanuel Futier, Bruno Pereira, Jean-Michel Constantin
BACKGROUND: During acute respiratory distress syndrome (ARDS), computed tomography (CT) can reveal two distinct lung imaging patterns, focal or non-focal, with different responses to PEEP, recruitment maneuvers and prone position. Nevertheless, their association with plasma biomarkers and their distinct functional/pathobiological mechanisms are unknown. The objective of this study was to characterize focal and non-focal patterns of lung CT-based imaging with plasma markers of lung injury...
March 23, 2016: Chest
https://www.readbyqxmd.com/read/26919679/acute-respiratory-distress-syndrome
#7
REVIEW
Suman Yadam, Eric Bihler, Marvin Balaan
Acute respiratory distress syndrome (ARDS) is a serious inflammatory disorder with high mortality. Its main pathologic mechanism seems to result from increased alveolar permeability. Its definition has also changed since first being described according to the Berlin definition, which now classifies ARDS on a severity scale based on PaO2 (partial pressure of oxygen, arterial)/FIO2 (fraction of inspired oxygen) ratio. The cornerstone of therapy was found to be a low tidal volume strategy featuring volumes of 6 to 8 mL per kg of ideal body weight that has been shown to have decreased mortality as proven by the ARDSnet trials...
April 2016: Critical Care Nursing Quarterly
https://www.readbyqxmd.com/read/26895920/effects-of-intraoperative-protective-lung-ventilation-on-postoperative-pulmonary-complications-in-patients-with-laparoscopic-surgery-prospective-randomized-and-controlled-trial
#8
S J Park, B G Kim, A H Oh, S H Han, H S Han, J H Ryu
BACKGROUND: Respiratory functions are usually impaired during pneumoperitoneum for laparoscopic surgery. This randomized, controlled and single-blinded study was performed to evaluate whether intraoperative protective lung ventilation influences postoperative pulmonary complications after laparoscopic hepatobiliary surgery. METHODS: Sixty-two patients were randomized to receive either conventional ventilation with alveolar recruitment maneuver (tidal volume of 10 ml/kg with inspiratory pressure of 40 cmH2O for 30 s after the end of pneumoperitoneum, group R), or protective lung ventilation (low tidal volume of 6 ml/kg with positive end-expiratory pressure [PEEP] of 5 cmH2O, group P)...
October 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/26866905/the-interrelationship-of-recruitment-maneuver-at-birth-antenatal-steroids-and-exogenous-surfactant-on-compliance-and-oxygenation-in-preterm-lambs
#9
David G Tingay, Anushi Rajapaksa, Karen McCall, Cornelis E E Zonneveld, Don Black, Elizabeth Perkins, Magdy Sourial, Anna Lavizzari, Peter G Davis
BACKGROUND: To describe the interrelationship between antenatal steroids, exogenous surfactant, and two approaches to lung recruitment at birth on oxygenation and respiratory system compliance (Cdyn) in preterm lambs. METHODS: Lambs (n = 63; gestational age 127 ± 1 d) received either surfactant at 10-min life (Surfactant), antenatal corticosteroids (Steroid), or neither (Control). Within each epoch lambs were randomly assigned to a 30-s 40 cmH2O sustained inflation (SI) or an initial stepwise positive end-expiratory pressure (PEEP) open lung ventilation (OLV) maneuver at birth...
June 2016: Pediatric Research
https://www.readbyqxmd.com/read/26836136/fast-versus-slow-recruitment-maneuver-at-different-degrees-of-acute-lung-inflammation-induced-by-experimental-sepsis
#10
COMPARATIVE STUDY
Raquel S Santos, Lillian Moraes, Cynthia S Samary, Cíntia L Santos, Maíra B A Ramos, Ana P Vasconcellos, Lucas F Horta, Marcelo M Morales, Vera L Capelozzi, Cristiane S N B Garcia, John J Marini, Marcelo Gama de Abreu, Paolo Pelosi, Pedro L Silva, Patricia R M Rocco
BACKGROUND: Large tidal volume (VT) breaths or "recruitment maneuvers" (RMs) are used commonly to open collapsed lungs, but their effectiveness may depend on how the RM is delivered. We hypothesized that a stepped approach to RM delivery ("slow" RM) compared with a nonstepped ("fast" RM), when followed by decremental positive end-expiratory pressure (PEEP) titration to lowest dynamic elastance, would (1) yield a more homogeneous inflation of the lungs, thus reducing the PEEP obtained during post-RM titration; (2) produce less lung morphofunctional injury, regardless of the severity of sepsis-induced acute lung inflammation; and (3) result in less biological damage in severe, but not in moderate, acute lung inflammation...
April 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/26806959/there-is-no-cephalocaudal-gradient-of-computed-tomography-densities-or-lung-behavior-in-supine-patients-with-acute-respiratory-distress-syndrome
#11
S A El-Dash, J B Borges, E L V Costa, M R Tucci, O T Ranzani, M P Caramez, C R R Carvalho, M B P Amato
BACKGROUND: There is debate whether pressure transmission within the lungs and alveolar collapse follow a hydrostatic pattern or the compression exerted by the weight of the heart and the diaphragm causes collapse localized in the areas adjacent to these structures. The second hypothesis proposes the existence of a cephalocaudal gradient in alveolar collapse. We aimed to define whether or not lung density and collapse follow a 'liquid-like' pattern with homogeneous isogravitational layers along the cephalocaudal axis in acute respiratory distress syndrome lungs...
July 2016: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/26761481/use-of-thoracic-electrical-impedance-tomography-as-an-auxiliary-tool-for-alveolar-recruitment-maneuvers-in-acute-respiratory-distress-syndrome-case-report-and-brief-literature-review
#12
Regis Goulart Rosa, William Rutzen, Laura Madeira, Aline Maria Ascoli, Felippe Leopoldo Dexheimer Neto, Juçara Gasparetto Maccari, Roselaine Pinheiro de Oliveira, Cassiano Teixeira
Thoracic electrical impedance tomography is a real-time, noninvasive monitoring tool of the regional pulmonary ventilation distribution. Its bedside use in patients with acute respiratory distress syndrome has the potential to aid in alveolar recruitment maneuvers, which are often necessary in cases of refractory hypoxemia. In this case report, we describe the monitoring results and interpretation of thoracic electrical impedance tomography used during alveolar recruitment maneuvers in a patient with acute respiratory distress syndrome, with transient application of high alveolar pressures and optimal positive end-expiratory pressure titration...
October 2015: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/26633603/respiratory-monitoring-with-electrical-impedance-tomography-for-lung-protective-ventilation-and-alveolar-recruitment-maneuver-in-a-patient-with-a-single-lung-transplant-and-early-graft-dysfunction
#13
A Romero, B Alonso, I Latorre, J García
A case is presented on a patient who underwent left single lung transplantation for emphysema type COPD. There was early graft dysfunction gradeiii during the immediate postoperative period, which required the implantation of an extracorporeal membrane oxygenator (ECMO). Respirator ventilatory parameters were adjusted to avoid lung distension, low tidal volume (Vc) (280ml), high respiratory rates (20rpm), and a positive pressure at end expiration (PEEP) level of 8cmH2O. On monitoring the pulmonary tidal volume distribution by bedside electrical impedance tomography (EIT), it was noted that most of the tidal volume was distributed in the native lung emphysema...
June 2016: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/26603283/successful-transplantation-of-lungs-from-an-uncontrolled-donor-after-circulatory-death-preserved-in-situ-by-alveolar-recruitment-maneuvers-and-assessed-by-ex-vivo-lung-perfusion
#14
F Valenza, G Citerio, A Palleschi, A Vargiolu, B Safaee Fakhr, A Confalonieri, M Nosotti, S Gatti, S Ravasi, S Vesconi, A Pesenti, F Blasi, L Santambrogio, L Gattinoni
We developed a protocol to procure lungs from uncontrolled donors after circulatory determination of death (NCT02061462). Subjects with cardiovascular collapse, treated on scene by a resuscitation team and transferred to the emergency room, are considered potential donors once declared dead. Exclusion criteria include unwitnessed collapse, no-flow period of >15 min and low flow >60 min. After death, lung preservation with recruitment maneuvers, continuous positive airway pressure, and protective mechanical ventilation is applied to the donor...
April 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/26557478/recruitment-maneuvers-in-acute-respiratory-distress-syndrome-the-safe-way-is-the-best-way
#15
REVIEW
Raquel S Santos, Pedro L Silva, Paolo Pelosi, Patricia Rm Rocco
Acute respiratory distress syndrome (ARDS) represents a serious problem in critically ill patients and is associated with in-hospital mortality rates of 33%-52%. Recruitment maneuvers (RMs) are a simple, low-cost, feasible intervention that can be performed at the bedside in patients with ARDS. RMs are characterized by the application of airway pressure to increase transpulmonary pressure transiently. Once non-aerated lung units are reopened, improvements are observed in respiratory system mechanics, alveolar reaeration on computed tomography, and improvements in gas exchange (functional recruitment)...
November 4, 2015: World Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/26543168/use-of-lung-ultrasound-to-assess-the-efficacy-of-an-alveolar-recruitment-maneuver-in-rabbits-with-acute-respiratory-distress-syndrome
#16
Dong-kai Li, Da-wei Liu, Yun Long, Xiao-ting Wang
OBJECTIVES: To investigate the application of lung ultrasound (US) in the evaluation and implementation of alveolar recruitment maneuvers in acute respiratory distress syndrome (ARDS). METHODS: Twelve rabbits with saline lavage-induced lung injury were randomly divided into 2 groups: one with alveolar recruitment guided by lung US and the other with alveolar recruitment guided by maximal oxygenation. Recruitment maneuvers were applied according to a stepwise incremental positive end-expiratory pressure method in both groups...
December 2015: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/26493593/recruitment-maneuvers-and-peep-titration
#17
REVIEW
Dean R Hess
The injurious effects of alveolar overdistention are well accepted, and there is little debate regarding the importance of pressure and volume limitation during mechanical ventilation. The role of recruitment maneuvers is more controversial. Alveolar recruitment is desirable if it can be achieved, but the potential for recruitment is variable among patients with ARDS. A stepwise recruitment maneuver, similar to an incremental PEEP titration, is favored over sustained inflation recruitment maneuvers. Many approaches to PEEP titration have been proposed, and the best method to choose the most appropriate level for an individual patient is unclear...
November 2015: Respiratory Care
https://www.readbyqxmd.com/read/26493592/a-comprehensive-review-of-prone-position-in-ards
#18
REVIEW
Richard H Kallet
Prone position (PP) has been used since the 1970s to treat severe hypoxemia in patients with ARDS because of its effectiveness at improving gas exchange. Compared with the supine position (SP), placing patients in PP effects a more even tidal volume distribution, in part, by reversing the vertical pleural pressure gradient, which becomes more negative in the dorsal regions. PP also improves resting lung volume in the dorsocaudal regions by reducing the superimposed pressure of both the heart and the abdomen...
November 2015: Respiratory Care
https://www.readbyqxmd.com/read/26464520/complications-of-prone-positioning-during-extracorporeal-membrane-oxygenation-for-respiratory-failure-a-systematic-review
#19
REVIEW
Rachel E Culbreth, Lynda T Goodfellow
BACKGROUND: Extracorporeal membrane oxygenation (ECMO) is often used in patients with severe respiratory failure to improve oxygenation and survival. ECMO gives the lungs an opportunity to rest and recover. The addition of prone positioning therapy used concurrently with ECMO can further aid in optimizing alveolar recruitment and reducing ventilator-induced lung injury, ultimately resulting in fewer ICU admission days and improved overall survival. The objective of this review is to perform a systematic analysis of the complications reported with prone positioning and ECMO in the adult population and to briefly report on the patient outcomes in the studies...
February 2016: Respiratory Care
https://www.readbyqxmd.com/read/26256990/effects-of-alveolar-recruitment-and-positive-end-expiratory-pressure-on-oxygenation-during-one-lung-ventilation-in-the-supine-position
#20
RANDOMIZED CONTROLLED TRIAL
Yong Seon Choi, Mi Kyung Bae, Shin Hyung Kim, Ji-Eun Park, Soo Young Kim, Young Jun Oh
PURPOSE: Hypoxemia during one-lung ventilation (OLV) remains a serious problem, particularly in the supine position. We investigated the effects of alveolar recruitment (AR) and positive end-expiratory pressure (PEEP) on oxygenation during OLV in the supine position. MATERIALS AND METHODS: Ninety-nine patients were randomly allocated to one of the following three groups: a control group (ventilation with a tidal volume of 8 mL/kg), a PEEP group (the same ventilatory pattern with a PEEP of 8 cm H₂O), or an AR group (an AR maneuver immediately before OLV followed by a PEEP of 8 cm H₂O)...
September 2015: Yonsei Medical Journal
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