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Southern Medical Journal Dec 2018Invasive mechanical ventilation is a potentially lifesaving intervention for acutely ill patients. The goal of this review is to provide a concise, clinically focused... (Review)
Review
Invasive mechanical ventilation is a potentially lifesaving intervention for acutely ill patients. The goal of this review is to provide a concise, clinically focused overview of basic invasive mechanical ventilation for the many clinicians who care for mechanically ventilated patients. Attention is given to how common ventilator modes differ in delivering a mechanical breath, evaluation of respiratory system mechanics, how to approach acute changes in airway pressure, and the diagnosis of auto-positive end-expiratory pressure. Waveform interpretation is emphasized throughout the review.
Topics: Biomechanical Phenomena; Humans; Lung Diseases, Obstructive; Monitoring, Physiologic; Respiration, Artificial; Respiratory Distress Syndrome; Respiratory Physiological Phenomena
PubMed: 30512128
DOI: 10.14423/SMJ.0000000000000905 -
Medizinische Klinik, Intensivmedizin... Nov 2021Weaning from invasive mechanical ventilation is challenging for the ICU team in terms of shortening time of ventilation via endotracheal tube in order to improve the...
Weaning from invasive mechanical ventilation is challenging for the ICU team in terms of shortening time of ventilation via endotracheal tube in order to improve the patient's prognosis by early extubation. Thereby prolonged mechanical ventilation (> 14 days), which is associated with risk of tracheotomy and prolonged weaning, shall be avoided. This article will give an overview about weaning categories, causes for weaning failure and strategies to overcome this problem. In the last part we will cover concepts in the process of prolonged weaning including discharge management with invasive mechanical ventilation.
Topics: Airway Extubation; Humans; Noninvasive Ventilation; Respiration, Artificial; Tracheostomy; Ventilator Weaning
PubMed: 34586430
DOI: 10.1007/s00063-021-00858-5 -
Journal of Intensive Care Medicine Nov 2022Since the inception of critical care medicine and artificial ventilation, literature and research on weaning has transformed daily patient care in intensive care units... (Review)
Review
Since the inception of critical care medicine and artificial ventilation, literature and research on weaning has transformed daily patient care in intensive care units (ICU). As our knowledge of mechanical ventilation (MV) improved, so did the need to study patient-ventilator interactions and weaning predictors. Randomized trials have evaluated the use of protocol-based weaning (vs. usual care) to study the duration of MV in ICUs, different techniques to conduct spontaneous breathing trials (SBT), and strategies to eventually extubate a patient whose initial SBT failed. Despite considerable milestones in the management of multiple diseases contributing to reversible respiratory failure, in the application of early rehabilitative interventions to preserve muscle integrity, and in ventilator technology that mitigates against ventilator injury and dyssynchrony, major barriers to successful liberation from MV persist. This review provides a broad encompassing view of weaning classification, causes of weaning failure, and evidence behind weaning predictors and weaning modes.
Topics: Humans; Intensive Care Units; Respiration, Artificial; Respiratory Insufficiency; Ventilator Weaning; Ventilators, Mechanical
PubMed: 35815895
DOI: 10.1177/08850666221095436 -
Critical Care (London, England) Jul 2021A personalized mechanical ventilation approach for patients with adult respiratory distress syndrome (ARDS) based on lung physiology and morphology, ARDS etiology, lung... (Review)
Review
A personalized mechanical ventilation approach for patients with adult respiratory distress syndrome (ARDS) based on lung physiology and morphology, ARDS etiology, lung imaging, and biological phenotypes may improve ventilation practice and outcome. However, additional research is warranted before personalized mechanical ventilation strategies can be applied at the bedside. Ventilatory parameters should be titrated based on close monitoring of targeted physiologic variables and individualized goals. Although low tidal volume (V) is a standard of care, further individualization of V may necessitate the evaluation of lung volume reserve (e.g., inspiratory capacity). Low driving pressures provide a target for clinicians to adjust V and possibly to optimize positive end-expiratory pressure (PEEP), while maintaining plateau pressures below safety thresholds. Esophageal pressure monitoring allows estimation of transpulmonary pressure, but its use requires technical skill and correct physiologic interpretation for clinical application at the bedside. Mechanical power considers ventilatory parameters as a whole in the optimization of ventilation setting, but further studies are necessary to assess its clinical relevance. The identification of recruitability in patients with ARDS is essential to titrate and individualize PEEP. To define gas-exchange targets for individual patients, clinicians should consider issues related to oxygen transport and dead space. In this review, we discuss the rationale for personalized approaches to mechanical ventilation for patients with ARDS, the role of lung imaging, phenotype identification, physiologically based individualized approaches to ventilation, and a future research agenda.
Topics: Humans; Precision Medicine; Respiration, Artificial; Respiratory Distress Syndrome; Respiratory Mechanics
PubMed: 34271958
DOI: 10.1186/s13054-021-03686-3 -
The American Journal of the Medical... Jul 2021Acute respiratory distress syndrome (ARDS) is a clinically and biologically heterogeneous disorder associated with a variety of disease processes that lead to acute lung... (Review)
Review
Acute respiratory distress syndrome (ARDS) is a clinically and biologically heterogeneous disorder associated with a variety of disease processes that lead to acute lung injury with increased non-hydrostatic extravascular lung water, reduced compliance, and severe hypoxemia. Despite significant advances, mortality associated with this syndrome remains high. Mechanical ventilation remains the most important aspect of managing patients with ARDS. An in-depth knowledge of lung protective ventilation, optimal PEEP strategies, modes of ventilation and recruitment maneuvers are essential for ventilatory management of ARDS. Although, the management of ARDS is constantly evolving as new studies are published and guidelines being updated; we present a detailed review of the literature including the most up-to-date studies and guidelines in the management of ARDS. We believe this review is particularly helpful in the current times where more than half of the acute care hospitals lack in-house intensivists and the burden of ARDS is at large.
Topics: Disease Management; Extracorporeal Membrane Oxygenation; Humans; Positive-Pressure Respiration; Practice Guidelines as Topic; Respiration, Artificial; Respiratory Distress Syndrome
PubMed: 34090669
DOI: 10.1016/j.amjms.2020.12.019 -
Seminars in Respiratory and Critical... Jun 2022Mechanical ventilation is a life-support system used to ensure blood gas exchange and to assist the respiratory muscles in ventilating the lung during the acute phase of...
Mechanical ventilation is a life-support system used to ensure blood gas exchange and to assist the respiratory muscles in ventilating the lung during the acute phase of lung disease or following surgery. Positive-pressure mechanical ventilation differs considerably from normal physiologic breathing. This may lead to several negative physiological consequences, both on the lungs and on peripheral organs. First, hemodynamic changes can affect cardiovascular performance, cerebral perfusion pressure (CPP), and drainage of renal veins. Second, the negative effect of mechanical ventilation (compression stress) on the alveolar-capillary membrane and extracellular matrix may cause local and systemic inflammation, promoting lung and peripheral-organ injury. Third, intra-abdominal hypertension may further impair lung and peripheral-organ function during controlled and assisted ventilation. Mechanical ventilation should be optimized and personalized in each patient according to individual clinical needs. Multiple parameters must be adjusted appropriately to minimize ventilator-induced lung injury (VILI), including: inspiratory stress (the respiratory system inspiratory plateau pressure); dynamic strain (the ratio between tidal volume and the end-expiratory lung volume, or inspiratory capacity); static strain (the end-expiratory lung volume determined by positive end-expiratory pressure [PEEP]); driving pressure (the difference between the respiratory system inspiratory plateau pressure and PEEP); and mechanical power (the amount of mechanical energy imparted as a function of respiratory rate). More recently, patient self-inflicted lung injury (P-SILI) has been proposed as a potential mechanism promoting VILI. In the present chapter, we will discuss the physiological and pathophysiological consequences of mechanical ventilation and how to personalize mechanical ventilation parameters.
Topics: Humans; Lung; Positive-Pressure Respiration; Respiration, Artificial; Tidal Volume; Ventilator-Induced Lung Injury
PubMed: 35439832
DOI: 10.1055/s-0042-1744447 -
BMC Pulmonary Medicine Nov 2022Mechanical ventilation is a lifesaving treatment used to treat critical neonatal patients. It facilitates gas exchange, oxygenation, and CO2 removal. Despite advances in... (Review)
Review
Mechanical ventilation is a lifesaving treatment used to treat critical neonatal patients. It facilitates gas exchange, oxygenation, and CO2 removal. Despite advances in non-invasive ventilatory support methods in neonates, invasive ventilation (i.e., ventilation via an endotracheal tube) is still a standard treatment in NICUs. This ventilation approach may cause injury despite its advantages, especially in preterm neonates. Therefore, it is recommended that neonatologists consider weaning neonates from invasive mechanical ventilation as soon as possible. This review examines the steps required for the neonate's appropriate weaning and safe extubation from mechanical ventilation.
Topics: Infant, Newborn; Humans; Airway Extubation; Respiration, Artificial; Ventilator Weaning; Intubation, Intratracheal; Respiration
PubMed: 36384517
DOI: 10.1186/s12890-022-02223-4 -
Intensive Care Medicine Dec 2017Much of the common practice in paediatric mechanical ventilation is based on personal experiences and what paediatric critical care practitioners have adopted from adult...
PURPOSE
Much of the common practice in paediatric mechanical ventilation is based on personal experiences and what paediatric critical care practitioners have adopted from adult and neonatal experience. This presents a barrier to planning and interpretation of clinical trials on the use of specific and targeted interventions. We aim to establish a European consensus guideline on mechanical ventilation of critically children.
METHODS
The European Society for Paediatric and Neonatal Intensive Care initiated a consensus conference of international European experts in paediatric mechanical ventilation to provide recommendations using the Research and Development/University of California, Los Angeles, appropriateness method. An electronic literature search in PubMed and EMBASE was performed using a combination of medical subject heading terms and text words related to mechanical ventilation and disease-specific terms.
RESULTS
The Paediatric Mechanical Ventilation Consensus Conference (PEMVECC) consisted of a panel of 15 experts who developed and voted on 152 recommendations related to the following topics: (1) general recommendations, (2) monitoring, (3) targets of oxygenation and ventilation, (4) supportive measures, (5) weaning and extubation readiness, (6) normal lungs, (7) obstructive diseases, (8) restrictive diseases, (9) mixed diseases, (10) chronically ventilated patients, (11) cardiac patients and (12) lung hypoplasia syndromes. There were 142 (93.4%) recommendations with "strong agreement". The final iteration of the recommendations had none with equipoise or disagreement.
CONCLUSIONS
These recommendations should help to harmonise the approach to paediatric mechanical ventilation and can be proposed as a standard-of-care applicable in daily clinical practice and clinical research.
Topics: Acute Lung Injury; Airway Extubation; Child; Critical Care; Humans; Intensive Care Units, Pediatric; Monitoring, Physiologic; Pediatrics; Respiration, Artificial; Respiratory Insufficiency; Severity of Illness Index; Tidal Volume; Ventilators, Mechanical
PubMed: 28936698
DOI: 10.1007/s00134-017-4920-z -
Respiratory Care Jul 2016Despite the historical precedent of mobilizing critically ill patients, bed rest is common practice in ICUs worldwide, especially for mechanically ventilated patients.... (Review)
Review
Despite the historical precedent of mobilizing critically ill patients, bed rest is common practice in ICUs worldwide, especially for mechanically ventilated patients. ICU-acquired weakness is an increasingly recognized problem, with sequelae that may last for months and years following ICU discharge. The combination of critical illness and bed rest results in substantial muscle wasting during an ICU stay. When initiated shortly after the start of mechanical ventilation, mobilization and rehabilitation can play an important role in decreasing the duration of mechanical ventilation and hospital stay and improving patients' return to functional independence. This review summarizes recent evidence supporting the safety, feasibility, and benefits of early mobilization and rehabilitation of mechanically ventilated patients and presents a brief summary of future directions for this field.
Topics: Bed Rest; Critical Care; Critical Illness; Early Ambulation; Humans; Intensive Care Units; Physical Therapy Modalities; Respiration, Artificial
PubMed: 27094396
DOI: 10.4187/respcare.04741 -
Jornal Brasileiro de Pneumologia :... 2018Patient-v entilator asynchrony (PVA) is a mismatch between the patient, regarding time, flow, volume, or pressure demands of the patient respiratory system, and the... (Review)
Review
Patient-v entilator asynchrony (PVA) is a mismatch between the patient, regarding time, flow, volume, or pressure demands of the patient respiratory system, and the ventilator, which supplies such demands, during mechanical ventilation (MV). It is a common phenomenon, with incidence rates ranging from 10% to 85%. PVA might be due to factors related to the patient, to the ventilator, or both. The most common PVA types are those related to triggering, such as ineffective effort, auto-triggering, and double triggering; those related to premature or delayed cycling; and those related to insufficient or excessive flow. Each of these types can be detected by visual inspection of volume, flow, and pressure waveforms on the mechanical ventilator display. Specific ventilatory strategies can be used in combination with clinical management, such as controlling patient pain, anxiety, fever, etc. Deep sedation should be avoided whenever possible. PVA has been associated with unwanted outcomes, such as discomfort, dyspnea, worsening of pulmonary gas exchange, increased work of breathing, diaphragmatic injury, sleep impairment, and increased use of sedation or neuromuscular blockade, as well as increases in the duration of MV, weaning time, and mortality. Proportional assist ventilation and neurally adjusted ventilatory assist are modalities of partial ventilatory support that reduce PVA and have shown promise. This article reviews the literature on the types and causes of PVA, as well as the methods used in its evaluation, its potential implications in the recovery process of critically ill patients, and strategies for its resolution.
Topics: Humans; Interactive Ventilatory Support; Positive-Pressure Respiration; Respiration, Artificial; Respiratory Insufficiency; Respiratory Rate
PubMed: 30020347
DOI: 10.1590/S1806-37562017000000185