View clinical trials related to Atelectasis.
Filter by:This study will use lung ultrasounds (LUS) to evaluate the incidence and severity of intraoperative atelectasis in anesthetized children undergoing minor surgery using a laryngeal mask airway. The children will be randomly assigned to be left in spontaneous ventilation with a Positive End Expiratory Pressure (PEEP) of 5cmH2O or to be ventilated with a pressure support mode.
Single Use Flexible bronchoscopes have gained popularity in recent years and are becoming technologically more advanced. They are widely accepted and used in everyday practice for simple procedures. The aim of this study is to evaluate single use flexible bronchoscopes in more advanced settings, such as interventional pulmonary procedures.
This study was divided into two parts, taking elderly patients undergoing general anesthesia surgery as the research subjects, through factorial design: 1. It was verified that in elderly patients undergoing general anesthesia surgery, innovative lung-protective ventilation strategies can reduce the occurrence of atelectasis and reduce the incidence of ventilator-related lung injury and postoperative pulmonary complications more than traditional lung-protective ventilation strategies; 2. On the basis of part one study proving that innovative lung-protective ventilation strategies can reduce the incidence of postoperative atelectasis and other complications in elderly patients undergoing general anesthesia surgery compared with traditional lung-protective ventilation strategies, further comparisons were made between the two factors of "positive pressure extubation" and "improved early postoperative respiratory training" in the innovative lung protective ventilation strategy, and whether there was an interaction between the two.
General anesthesia is associated with loss of pulmonary functional residual capacity and the consequent development of atelectasis and closure of the small airway. Mechanical ventilation in a lung with reduced functional residual capacity and atelectasis increased the dynamic alveolar stress-strain, inducing a local inflammatory response in atelectatic lung areas known as ventilatory-induced lung injury. This phenomenon may appear even in healthy patients undergoing general anesthesia and predisposes them to hypoxemic episodes that can persist in the early postoperative period. Lung recruitment maneuvers restore the functional residual capacity and, therefore, protect the lungs from lung injury. A key issue in this kind of treatment is detecting the lung's closing pressure in order to maintain the end-expiratory pressure above such a limit.
The goal of this observational study is to learn about the influence of mechanical ventilation on the right ventricular (RV) function. The primary focus is on methods which are routinely used to improve gas exchange in ventilated patients (positive end expiratory pressure [PEEP], inhalation of NO, prone positioning). The main questions it aims to answer are: - Effects of prone positioning, PEEP and inhalation of NO on RV-function - Are there determinants (clinical, laboratory, demographic, echocardiographic) for the right ventricular response to the above? RV-Function will be assessed with right ventricular pressure-volume loops recorded with a conductance catheter at - each PEEP-Level during titration of the best PEEP - before and every 5 minutes (for max. 45 minutes) after rotation to prone position - before and under continuous inhalation of NO (if required based on clinical grounds)
During induction of general anaesthesia physiological breathing stops and needs to be artificially established with facemask ventilation, and finally tracheal intubation or placement of a supraglottic airway. During the airway management, when lungs are not or only poorly ventilated, there is a risk for atelectasis. These atelectasis can contribute to respiratory adverse events (e.g. pulmonary infection or respiratory insufficiency) during or after general anaesthesia. High-flow nasal oxygen (HFNO) is the administration of heated, humidified and blended air/oxygen mixture via a nasal cannula at rates ≥ 2 L/kg/min. HFNO used during airway management (i.e. intubation) can extend the tolerance for apnea, the time from end of physiological breathing until artificial ventilation is established. The main objective of this study is thus to investigate the variations of poorly ventilated lung units (i.e., silent spaces) as a surrogate for functional residual capacity measured by electrical impedance tomography to dynamically assess atelectasis formation and regression under apnoeic oxygenation with different flow rates.
This study was a single-center, prospective, randomized controlled, two-arm study. This study will be conducted in the First Hospital of China Medical University. the investigators aimed to investigate the effects of different inspired oxygen concentrations in lung protective ventilation strategies on immediate postoperative atelectasis and intraoperative changes of oxygenation index in patients undergoing neurosurgical surgery in the supine position.
Robotic and laparoscopic surgeries are tend to cause lung atelectasis due to the insufflation of CO2 into abdomen. However, ultrasonographic measurement for this phenomenon and its clinical use is not well investigated. In this particular study, It is aimed to observe lung ultrasound score (LUS) changes in robotic and laparoscopic supine position surgeries such as prostatectomies and cystectomies. LUS is a pragmatic measurement method that calculates the degree of atelectasis and consolidation in the lungs. Both hemithoraxes are separated into 3 different segments with vertical lines (one between the parasternal line and anterior axillary line, one between the anterior and posterior axillary line, and one posterior to the posterior axillary line). These vertical segments are also divided into two with an horizontal line on the nipple. Lung ultrasonography is applied in all 12 zones for both lungs in the intercostal regions and a scoring system is used. Accordingly, pure A lines (transverse frequent lines) reflects normal lung tissue with no consolidation and scored as zero points (Also named "A"). If less than 4 B lines (vertical lines reflecting some degree of consolidation) is observed, it refers to 1 point (named "B1"). 4 or more B lines refers to 2 points (B2), and if wide and coalesced B lines or patchy pleural line is observed that refers to 3 points (C). All evaluations will be made in supine position. In this trial, LUS will be applied in three different time points: T1: 5 minutes after orotracheal intubation T2: At the end of surgery, before extubation (under deep anesthetic state) T3: 30 minutes after extubation, in postanesthesia care unit During the surgery and the postoperative care period standart monitorization and mechanical ventilation data will be gathered. Also intraoperative and postoperative blood gas analysis will be obtained to observe oxygenation changes. This study is planned as a prospective observational study and our hypothesis is that LUS scores would be lower in acute postoperative period with robotic and laparoscopic surgeries. Therefore primary outcome is the numeric change in T3 and T1. Secondarily, LUS scores will be evaluated between robotic group and laparoscopic group patients for all time points.
The overall objective of this study is to describe the incidence of postoperative pulmonary complications in patients with a positive and negative AIR-test result. Second, the investigators wish to describe the incidence of a positive AIR-test and its association with the development of PPC. In addition, the investigators aim to describe whether mechanical ventilation strategy differs between patients with a positive and negative AIR-test.
We aimed to investigate the effect of posterior quadratus lumborum block on postoperative atelectasis in inguinal hernia surgery in pediatric patients.