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Recruitment maneuver

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https://www.readbyqxmd.com/read/29141185/increased-cross-bridge-recruitment-contributes-to-transient-increase-in-force-generation-beyond-maximal-capacity-in-human-myocardium
#1
Nima Milani-Nejad, Jae-Hoon Chung, Benjamin D Canan, Vadim V Fedorov, Bryan A Whitson, Ahmet Kilic, Peter J Mohler, Paul M L Janssen
Cross-bridge attachment allows force generation to occur, and rate of tension redevelopment (ktr) is a commonly used index of cross-bridge cycling rate. Tension overshoots have been observed briefly after a slack-restretch ktr maneuver in various species of animal models and humans. In this study, we set out to determine the properties of these overshoots and their possible underlying mechanism. Utilizing human cardiac trabeculae, we have found that tension overshoots are temperature-dependent and that they do not occur at resting states...
November 12, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29134245/esophageal-pressure-research-or-clinical-tool
#2
REVIEW
E Baedorf Kassis, S H Loring, D Talmor
Esophageal manometry has traditionally been utilized for respiratory physiology research, but clinicians have recently found numerous applications within the intensive care unit. Esophageal pressure (PEs) is a surrogate for pleural pressures (PPl), and the difference between airway pressure (PAO) and PEs provides a good estimate for the pressure across the lung also known as the transpulmonary pressure (PL). Differentiating the effects of mechanical ventilation and spontaneous breathing on the respiratory system, chest wall, and across the lung allows for improved personalization in clinical decision making...
November 13, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/29112971/effects-of-positive-end-expiratory-pressure-and-recruitment-maneuvers-in-a-ventilator-induced-injury-mouse-model
#3
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/29105056/specific-anesthesia-induced-lung-volume-changes-from-induction-to-emergence-a-pilot-study
#4
P Kostic, A LoMauro, A Larsson, G Hedenstierna, P Frykholm, A Aliverti
BACKGROUND: Studies aimed at maintaining intraoperative lung volume to reduce post-operative pulmonary complications have been inconclusive because they mixed up the effect of general anesthesia and the surgical procedure. Our aims were to study: (1) lung volume during the entire course of anesthesia without the confounding effects of surgical procedures; (2) the combination of three interventions to maintain lung volume; and (3) the emergence phase with focus on the restored activation of the respiratory muscles...
November 3, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29066979/autonomic-dysfunction-in-wilson-s-disease-a-comprehensive-evaluation-during-a-3-year-follow-up
#5
Kai Li, Charlotte Lindauer, Rocco Haase, Heinz Rüdiger, Heinz Reichmann, Ulrike Reuner, Tjalf Ziemssen
Objectives: Wilson's disease is reported to have autonomic dysfunction, but comprehensive evaluation of autonomic function is lacking. Additionally, little is known about the change of autonomic function of Wilson's disease during continuous therapy. We assumed that patients with Wilson's disease had both sympathetic and parasympathetic autonomic impairments, and the autonomic dysfunction might be stable across a 3-year follow-up after years of optimal treatment. Methods: Twenty-six patients with Wilson's disease and twenty-six healthy controls were recruited...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29066591/the-role-of-rescue-therapies-in-the-treatment-of-severe-ards
#6
REVIEW
Francesco Alessandri, Francesco Pugliese, V Marco Ranieri
ARDS is characterized by a non-cardiogenic pulmonary edema with bilateral chest radiograph opacities and hypoxemia refractory to oxygen therapy. It is a common cause of admission to the ICU due to hypoxemic respiratory failure requiring mechanical ventilation. Corticosteroids are not recommended in ARDS patients. Rescue therapies alleviate hypoxemia in patients unable to maintain reasonable oxygenation: recruitment maneuvers, prone positioning, inhaled nitric oxide, high-frequency oscillatory ventilation, and extracorporeal membrane oxygenation improve oxygenation, but their impact on mortality remains unproven...
October 24, 2017: Respiratory Care
https://www.readbyqxmd.com/read/29065674/two-segment-foot-model-for-the-biomechanical-analysis-of-squat
#7
E Panero, L Gastaldi, W Rapp
Squat exercise is acquiring interest in many fields, due to its benefits in improving health and its biomechanical similarities to a wide range of sport motions and the recruitment of many body segments in a single maneuver. Several researches had examined considerable biomechanical aspects of lower limbs during squat, but not without limitations. The main goal of this study focuses on the analysis of the foot contribution during a partial body weight squat, using a two-segment foot model that considers separately the forefoot and the hindfoot...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29052467/the-effect-of-level-of-injury-and-physical-activity-on-heart-rate-variability-following-spinal-cord-injury
#8
Athanasios Kyriakides, Dimitrios Poulikakos, Angeliki Galata, Dimitrios Konstantinou, Elias Panagiotopoulos, Elisabeth Chroni
OBJECTIVE/BACKGROUND: To assess frequency domain heart rate variability (HRV) parameters at rest and in response to postural autonomic provocations in individuals with spinal cord injury (SCI) and investigate the autonomic influences on the heart of different physical activities. DESIGN: Cross-sectional study. METHODS: Ten subjects with complete cervical SCI and fourteen subjects with complete low thoracic SCI were prospectively recruited from the community and further divided in sedentary and physically active groups, the latter defined as regular weekly 4 hour physical activity for the preceding 3 months...
October 20, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29043837/lung-recruitment-maneuvers-for-adult-patients-with-acute-respiratory-distress-syndrome-a-systematic-review-and-meta-analysis
#9
Ewan Goligher, Carol Hodgson, Neill Kj Adhikari, Maureen O Meade, Hannah Wunsch, Elizabeth Uleryk, Ognjen Gajic, Marcelo Amato, Niall D Ferguson, Gordon D Rubenfeld, Eddy Fan
RATIONALE: In patients with acute respiratory distress syndrome (ARDS), lung recruitment maneuvers (LRMs) may prevent ventilator-induced lung injury and improve survival. OBJECTIVES: To summarize the current evidence in support of the use of LRMs in adult patients with ARDS. METHODS: We conducted a systematic review and meta-analysis of randomized trials comparing mechanical ventilation strategies with and without LRMs. Eligible trials were identified from previously published systematic reviews and an updated literature search...
October 18, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29043834/higher-peep-versus-lower-peep-strategies-for-patients-with-acute-respiratory-distress-syndrome-a-systematic-review-and-meta-analysis
#10
Allan J Walkey, Lorenzo Del Sorbo, Carol Hodgson, Neill Kj Adhikari, Hannah Wunsch, Maureen O Meade, Elizabeth Uleryk, Dean Hess, Daniel S Talmor, B Taylor Thompson, Roy G Brower, Eddy Fan
RATIONALE: Higher positive end-expiratory pressure (PEEP) levels may reduce atelectrauma but increase over-distention lung injury. Whether higher PEEP improves clinical outcomes among patients with acute respiratory distress syndrome (ARDS) is unclear. OBJECTIVE: To compare clinical outcomes of mechanical ventilation strategies using higher PEEP levels versus lower PEEP strategies in patients with ARDS. METHODS: We performed a systematic review and meta-analysis of clinical trials investigating mechanical ventilation strategies using higher versus lower PEEP levels...
October 18, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29040222/neurovascular-response-during-exercise-and-mental-stress-in-anabolic-steroid-users
#11
Rafael Armani Porello, Marcelo Rodrigues Dos Santos, Francis Ribeiro de Souza, Guilherme Wesley Peixoto da Fonseca, Ana Luiza Carrari Sayegh, Tiago Franco de Oliveira, César Abreu Akiho, Maurício Yonamine, Rosa Maria Rodrigues Pereira, Carlos Eduardo Negrão, Maria-Janieire de Nazaré Nunes Alves
PURPOSE: Increased resting muscle sympathetic nerve activity (MSNA) and lower forearm blood flow (FBF) were observed in young men who use anabolic androgenic steroids (AAS). However, the response of MSNA and FBF in AAS users triggered by muscle mechanoreflex and central command has never been tested. Additionally, we evaluated the blood pressure (BP) and heart rate (HR) responses during these maneuvers. METHODS: Nineteen AAS users (AASU) aged 31±6 yr and 18 AAS nonusers (AASNU) aged 29±4 yr were recruited...
October 16, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29032330/biofabricating-atherosclerotic-plaques-in%C3%A2-vitro-engineering-of-a-three-dimensional-human-fibroatheroma-model
#12
Anna Mallone, Chantal Stenger, Arnold Von Eckardstein, Simon P Hoerstrup, Benedikt Weber
Atherosclerotic plaques are cholesterol-induced inflammatory niches accumulating in the vascular sub-endothelial space. Cellular and extracellular composition of human plaques is maneuvered by local inflammation that leads to alterations in the original vascular microenvironment and to the recruitment of an invading fibrous layer (fibroatharoma). In the present study we introduce a bioengineered three-dimensional model of human fibroatheroma (ps-plaque) assembled with a tailored hanging-drop protocol. Using vi-SNE based multidimensional flow cytometry data analysis we compared the myeloid cell-populations in ps-plaques to those in plaques isolated from human carotid arteries...
September 28, 2017: Biomaterials
https://www.readbyqxmd.com/read/29030754/postural-lung-recruitment-assessed-by-lung-ultrasound-in-mechanically-ventilated-children
#13
Gerardo Tusman, Cecilia M Acosta, Stephan H Böhm, Andreas D Waldmann, Carlos Ferrando, Manuel Perez Marquez, Fernando Suarez Sipmann
BACKGROUND: Atelectasis is a common finding in mechanically ventilated children with healthy lungs. This lung collapse cannot be overcome using standard levels of positive end-expiratory pressure (PEEP) and thus for only individualized lung recruitment maneuvers lead to satisfactory therapeutic results. In this short communication, we demonstrate by lung ultrasound images (LUS) the effect of a postural recruitment maneuver (P-RM, i.e., a ventilatory strategy aimed at reaerating atelectasis by changing body position under constant ventilation)...
October 13, 2017: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/29018839/clinical-assessment-of-physical-examination-maneuvers-for-superior-labral-anterior-to-posterior-lesions
#14
Lyndsay E Somerville, Kevin Willits, Andrew M Johnson, Robert Litchfield, Marie-Eve LeBel, Jaydeep Moro, Dianne Bryant
Purpose  Shoulder pain and disability pose a diagnostic challenge owing to the numerous etiologies and the potential for multiple disorders to exist simultaneously. The evidence to support the use of clinical tests for superior labral anterior to posterior complex (SLAP) is weak or absent. The purpose of this study is to determine the diagnostic validity of physical examination maneuvers for SLAP lesions by performing a methodologically rigorous, clinically applicable study. Methods  We recruited consecutive new shoulder patients reporting pain and/or disability...
October 2017: Surg J (N Y)
https://www.readbyqxmd.com/read/28984091/repeated-alveolar-recruitment-maneuvers-with-and-without-positive-end-expiratory-pressure-during-bariatric-surgery-a-randomized-trial
#15
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
#16
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
#17
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
#18
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
#19
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/28953669/ultrasonic-monitoring-in-the-assessment-of-pulmonary-recruitment-and-the-best-positive-end-expiratory-pressure
#20
RANDOMIZED CONTROLLED TRIAL
Ke-Qiang Tang, Shao-Ling Yang, Bin Zhang, Hong-Xiang Liu, Dong-Ying Ye, Hong-Ze Zhang, Shuang Ma
The aim of this study was to explore the clinical value of ultrasonic monitoring in the assessment of pulmonary recruitment and the best positive end-expiratory pressure (PEEP).Between January 2015 and June 2017, 40 patients with acute respiratory distress syndrome in our hospital were randomly divided into 2 groups: ultrasound group (ULS group; n = 20) and oxygenation group (OXY group; n = 20). The PEEP incremental method was used to perform recruitment maneuvers. Ultrasound scoring and the oxygenation method were used to evaluate the pulmonary recruitment endpoint...
September 2017: Medicine (Baltimore)
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