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NCT05226247
The purpose of this study is to determine if the left and right ventricular systolic function is involved in the development of weaning failure related to weaning-induced pulmonary edema.
NCT04194346
Mechanical ventilation is frequently used in the operating room and the intensive care settings. Although essential in many cases, mechanical ventilation can be responsible for ventilator-induced lung injury (VILI). The relationship between mechanical ventilation and VILI has been clearly demonstrated in animals and is highly suspected in humans. The putative mechanism responsible for VILI is excessive pulmonary strain or overdistension. Frequently observed in mechanically ventilated patients, the presence of a severe pre-existing pulmonary disease can increase the risk of overdistension. The development of a tool allowing early detection of pulmonary overdistension would represent a great asset in the prevention of VILI by allowing safer adjustments of mechanical ventilation parameters. Ultrasonographic imaging is a non-radiant, non-invasive technique already available in the intensive care setting. Already used for cardiac strain measurements, ultrasonography is a promising avenue to assess pulmonary strain.This study will aim to establish normal pleural strain values using ultrasonography in healthy volunteers. Purpose: The primary objective is to calculate 95% confidence intervals in pleural strain for a set of 8 inspired volumes at 15 predetermined lung areas in healthy volunteers. The secondary objectives of the study are: * to modelize the relation between pleural strain and inspired volume * to modelize the relation between pleural strain and global pulmonary volumetric strain * to modelize the relation between pleural strain and maximal echo intensity change * to compare the regional distribution pattern of pleural strain in healthy volunteers in dependent versus non-dependent areas. Hypothesis: Elastography using the Lagrangian speckle model estimator based on optical flow allows the determination of normal mean values and 95% confidence intervals of pleural strain (average Von Mises coefficient) in 15 predetermined lung areas for a set of 8 inspired volumes in healthy volunteers.
NCT05211661
The gold standard of twitch transdiaphragmatic pressure recordings would ultimately clear the fog around the rate of development of Ventilator induced Diaphragm Dysfunction (VIDD) in mechanically ventilated patients over time. Through measurements made even after mechanical ventilation (MV) it could be clarified to what extent patients recover from VIDD. Paired with cortical stimulation and electromyographic recordings of diaphragm muscle potentials, it could be explored to what extent decreased diaphragm excitability due to long term MV contributes to VIDD on the level of motor cortex. Against that background the present project aims at determining the rate of decline in diaphragm function, strength and control in patients undergoing MV (including measurements after extubation).
NCT07353814
This study will be conducted to compare the effectiveness of progressive inspiratory flow trigger sensitivity rising versus stepwise pressure support reduction as ventilator-based inspiratory muscle training methods on weaning and extubation success in mechanically ventilated patients with respiratory failure.
NCT06430229
General anesthesia is characterized by temporary loss of consciousness and decreased reflex activity without any change in vital functions. It can be performed with intravenous and/or inhalation agents. During general anesthesia, breathing is stopped and respiratory support is provided to patients with various respiratory equipment and ventilation modes on the anesthesia device. The most commonly used ventilation modes during anesthesia are volume controlled (VCV) and pressure controlled (PCV). In pressure-controlled ventilation, ventilation is provided with the airway pressure determined by the anesthesiologist throughout inspiration. While the pressure is constant during inspiration, the tidal volume is variable. In volume controlled ventilation, ventilation executed at the volume is set by the anesthesiologist. In other words, the determined volume is constant, but airway pressures vary. In pediatric anesthesia practice modes have not been shown to have a clear advantage over each other. Both modes have advantages and disadvantages. With the development of modern anesthesia devices in recent years, safe ventilation can be provided even in very young children with volume controlled mode (VCV). Atelectasis is the restriction of gas exchange due to complete or partial collapse of the lung. Atelectasis can be seen in 90 percent of patients receiving general anesthesia. This incidence is reported to be 68-100 percent in children. Lung ultrasonography is an imaging method with many advantages for imaging lung-related diseases, such as not containing ionizing radiation, being inexpensive, and being performed at the bedside. Recently, its use by anesthesiologists has become widespread in many lung pathologies, including atelectasis. Traditional and modified lung ultrasonography scoring systems can be used to evaluate atelectasis in lung parenchyma with ultrasonography. In addition to the traditional system, modified scoring system also enables to evaluate small subpleural consolidations In this study, it was aimed to compare the effects of volume controlled and pressure controlled ventilation modes used in general anesthesia in children on atelectasis with lung ultrasonography.
NCT01948635
The investigators hypothesized that PVC tapered-cuff tracheal tubes would reduce microaspiration of gastric content as determined by pepsin level in tracheal aspirate.
NCT03202641
The goal of this interventional crossover study, in intubated and mechanically ventilated Acute Respiratory Distress Syndrome (ARDS) patients, is to compare two positive end-expiratory pressure (PEEP) titration techniques regarding: respiratory mechanics, gas exchange, changes in aeration, ventilation/perfusion matching its impact on cardiac function, especially the right heart (RH). The PEEP titration techniques are: PEEP selection based on low PEEP/high FiO2 table ("PEEPARDSnet") and lung recruitment maneuver (LRM) plus PEEPdec titration based on the best compliance of the respiratory system("PEEPLRM").
NCT03012360
Antimicrobial treatment could be beneficial in patients with ventilator-associated tracheobronchitis (VAT). The hypothesis of this study is that antibiotic treatment for VAT (3 or 7 days), compared with no antibiotic treatment, would reduce the incidence of transition from VAT to ventilator-associated pneumonia (VAP).
NCT07245888
Ventilator-associated pneumonia (VAP) is a common and serious infection in patients receiving mechanical ventilation in intensive care units. Current diagnostic methods are imprecise, leading to unnecessary antibiotic use and delayed treatment. The ClusterVAP study aims to identify biologically and clinically distinct subgroups of patients with suspected VAP by analyzing proteins in bronchoalveolar lavage (BAL) fluid using advanced proteomic techniques. This multicentre observational study will enroll approximately 400 adult patients from intensive care units in Sweden, France, Portugal, Denmark, and the United Kingdom. BAL or mini-BAL samples collected for clinical reasons will be analyzed to define "pneumoclusters" and explore their association with patient outcomes. The study will also identify candidate biomarkers that could support future diagnostic tools. No experimental treatments are given; all patients receive standard care. Results may improve diagnostic accuracy and guide personalized treatment strategies for critically ill patients.
NCT07207772
This study is a prospective, single-center, single-blind, randomized controlled clinical trial. Patients scheduled for laparoscopic bariatric surgery will be selected and randomly assigned to either the EIT-guided individualized PEEP group (Group P-eit) or the control group (Group P-8). Group P will be ventilated using the PEEP value determined by EIT, while Group C will be ventilated with a fixed PEEP value of 8 cmH2O.The primary outcome is the incidence of postoperative pulmonary complications (PPCs) within 72 hours after surgery.
NCT05977153
The goal of this study is to compare two different ways of helping patients with a condition called sepsis who need help breathing using a machine called a ventilator. The investigators want to study which way of setting the ventilator is better for the lungs. Here are the main questions the investigators want to answer: 1. How does the amount of air in the lungs and the way it moves differ between the two ways? 2. How does the way air spreads out in different parts of the lungs differ between the two ways? In this study, the investigators will take special pictures of the lungs using a machine called a CT scan. The pictures will show us how much the lungs stretch and how much air is in different parts of the lungs. The investigators will compare two different ways of using the ventilator: one personalized for each patient based on their breathing, and another way that is commonly used. By comparing these two ways, the investigators hope to learn which one is better for helping patients with sepsis who need the ventilator. This information can help doctors make better decisions about how to care for these patients and improve their breathing.
NCT03405779
The primary objective of the study is to create a small dataset of regional pulmonary strain values in patients suffering from pulmonary diseases under mechanical ventilation in an intensive care setting. Hypothesis: The analysis of lung ultrasonographic sequences using speckle-tracking allows the determination of local pleural strain in 4 predetermined pulmonary areas in mechanically ventilated patients suffering from pulmonary diseases.
NCT06562725
Fiberoptic bronchoscopy (FOB) can cause a significant increase in respiratory resistances and airway pressure during mechanical ventilation (MV), which can jeopardize the delivery of the ventilatory assistance. This randomized controlled study tests the hypothesis that new ventilator settings aimed at reducing airway pressure may facilitate FOB during MV. Results of this trial should lead to propose a new ventilatory strategy for critically ill patients needing a FOB procedure under MV.
NCT06971042
The aim of this study is to assess accuracy of Lung ultrasound score for early diagnosis of acute respiratory distress syndrome in patients who expected to be mechanically ventilated more than 24 hour in comparison with computed tomography chest .
NCT06602050
The maximal inspiratory pressure or negative inspiratory force values is a parameter that measures the functional ability of the respiratory system. The ability to reduce the risk of atelectasis, effective coughing and mobilization of airway secretions is directly proportional to the magnitude of this value. Grip strength is a parameter that noninvasively assesses functional status in critical care patients.Respiratory muscles work in a complex interaction with peripheral muscles. This dynamic relationship has been described in many populations.The aim of this study was to determine the relationship between maximum inspiratory pressure and grip strength and physical functional status in mechanical ventilator patients.
NCT05454332
Introduction: The caffeine is used in the treatment for apnea of prematurity and it has several positive effects in the neurodevelopment of preterm babies. There are innumerable observational studies suggesting that initiating caffeine in the first hours of life may offer more benefits in the reduction of the necessity of intubation and in ventilation time. It is necessary to expand further research on the best time to start caffeine, which may improve the quality of care for premature infants. Objective: To evaluate the benefits of caffeine administration in the first two hours of life compared to administration at 24 hours of life in premature patients on noninvasive mechanical ventilation with birth weights less than 1250 grams. Methodology: Preterm newborn patients with birth weight \< 1250 grams born at Hospital de Clínicas de Porto Alegre who are not intubated in the delivery room will be included. Patients will be randomized into two groups. One arm of the study will receive caffeine at 2 hours of age and the other arm will receive caffeine at 24 hours of age (control). Patients in the control group will receive 0.9% SF at 2 hours of life in order to keep the study blinded. The following outcomes will be evaluated: need for intubation, time on invasive and non-invasive mechanical ventilation, BPD, necrotizing enterocolitis, need for ROP treatment, PDA with hemodynamic repercussions, peri-intraventricular hemorrhage, leukomalacia and death. The sample size calculation is 50 patients, 25 in each arm. Expected Results: It is expected to find a 43% reduction in the need for intubation in preterm infants who receive caffeine in the first two hours of life compared to administration at 24 hours of life. It is also expected to find a reduction in mechanical ventilation time, in addition to a possible reduction in negative outcomes associated with prematurity.
NCT05536531
Particularly, muscle respiratory wasting will occur early (18 to 69 hours) in up to 60% of patients with mechanical ventilation (MV), leading rapidly to diaphragmatic weakness, which is associated with prolonged MV use, longer ICU and hospital stay, and higher mortality risk. Sepsis and muscle inactivity, derived from sedation and MV use, are key driver mechanisms for developing these consequences, which can be avoided through early physical activation. However, exercise is limited at the early stages of care, where sedation and MV are needed, delaying muscle activation. Neuromuscular electrical stimulation (NMES) represents an alternative to achieve early muscle contraction in non-cooperative patients, being able to prevent local muscle wasting and, according to some reports, has the potential to shorten the time on MV, suggesting a systemic effect through myokines, a diverse range of cytokines and chemokines secreted by myocytes during muscle contraction. However, no studies have evaluated whether NMES applied to peripheral muscles can exert distant muscle effects over the diaphragm, ameliorating its weakness and if this protective profile is associated with myokine's change in ICU patients. This proposal comprises a randomized controlled study of NMES applied twice daily, for three days, compared to standard care (no NMES). Thirty-two patients will be recruited in the first 48 hours after MV and randomly assigned to the control group or NMES group (16 subjects each). Muscle characterization of quadriceps and diaphragm will be performed at baseline (Day 1, before the first NMES session) and after the last NMES session (morning of day 4). Myokine measurements \[IL-1, IL-6, IL-15, Brain-Derived Neurotrophic Factor (BDNF), Myostatin and Decorin\], through blood serum obtained from peripheric blood samples, will be performed just before starting NMES (T0) at the end of the session (T0.5), and 2 and 6 hours later (T2 and T6). These myokine curves will be repeated on days 1 and 3 at the first NMES session of the day. The Control group will be assessed in the same way and timing, except that blood samples will be at T0 and T6. Additionally, functional outcomes such as MV time and ICU length of stay will be registered for all patients at ICU discharge. Standard care won´t be altered.
NCT06771232
High positive end-expiratory pressure (PEEP) levels required to achieve clinical benefits may increase ICP and reduce cerebral perfusion pressure (CPP) in patients at risk of intracranial hypertension. However, individualizing ventilation parameters is essential for each patient. Among protective ventilation strategies, PEEP is key to preventing alveolar collapse. The PEEP level that minimizes alveolar collapse while avoiding overdistension of the pulmonary parenchyma is known as the Best PEEP. This study aims to evaluate the application of Best PEEP in cranial neurosurgery.
NCT06769308
Sedation and analgesia are fundamental tools for managing critical patients who require mechanical ventilation. However, recent scientific literature highlights that excessive sedation in these patients can increase the duration of mechanical ventilation and extend the overall length of stay in intensive care, as well as expose them to a higher risk of hypotension, venous thrombosis, and nosocomial pneumonia. The titration of sedation and analgesia in intensive care, on the other hand, is currently based primarily on clinical parameters (such as the onset of delirium, asynchronies with the ventilator, for example), which can lead to treatments not proportionate to the patient's needs. The present study aims to evaluate the application, in an intensive care setting, of the Conox® system, a device already widely used in monitoring the anesthetic plan in the operating room. This tool would allow, through the processing of an EEG trace, the assessment of the level of sedation (qCON) and the probable algic response (qNOX), thus providing valuable information for the fine-tuning of the analgo-sedative plan.
NCT03612583
This study is designed to test a proposed strategy for lung- and diaphragm-protective ventilation (LDPV) in patients with acute hypoxemic respiratory failure. Ventilation and sedation will be titrated to evaluate whether it is feasible and safe within this patient population.