View clinical trials related to General Anesthesia.
Filter by:Anesthesia for emergency surgery is a situation at risk of pulmonary aspiration of gastric contents. It has been previously reported that bedside two-dimensional ultrasonography can be a useful tool for anesthesiologists to determine gastric contents and volume in adults and children. In this prospective study, preoperative qualitative ultrasound assessment of gastric contents is performed for each children admitted for emergency surgery, in order to plane in case of empty stomach an intravenous or inhalation technique induction rather than an rapid sequence induction.
The purpose of this study is to investigate whether the pressure controlled ventilation can reduce gastric insufflation compared to the volume controlled ventilation in patients who were mechanically ventilated with the i-gel.
The purpose of this study is to investigate whether the pressure controlled ventilation can reduce gastric insufflation compared to the volume controlled ventilation in patients who were mechanically ventilated with the i-gel.
The purpose of this study is to find out the optimal dose for Remimazolam Tosilate as an intravenous general anaesthetic drug in operations and to determine its efficacy and safety profile comparing to propofol.
The purpose of this study is to investigate the changes of the oropharyngeal leak pressure of the air-Q self-pressurizing masked laryngeal airway in the different head and neck positions. Moreover, the adequacy of ventilation will be assessed in the different head and neck positions.
The mask ventilation is a necessary procedure to provide oxygenation before the tracheal intubation although the gastric insufflation occurs during the mask ventilation. Sugammadex, which is recently introduced, enables the use of high-dose muscle relaxant without concerning the delayed recovery of neuromuscular blockade. It seems that there is no need to perform the mask ventilation in adults with normal airway if the investigators use high-dose muscle relaxant for the anesthetic induction because adequate muscle relaxation can be achieved within 1-2 minutes. Therefore, the investigators hypothesized that routine mask ventilation is not needed in adult patients with normal airway. The investigators will compare the incidence of desaturation and gastric insufflation between the patients with mask ventilation and the patients without mask ventilation.
The purpose of this study is to determine whether an operative hemodynamic optimization using the plethysmographic variability index during orthopedic surgery could decrease the length of hospital stay and the postoperative morbidity.
Postoperative respiratory failure, particularly after surgery under general anesthesia, adds to the morbidity and mortality of surgical patients. Anesthesiologists inconsistently use positive end-expiratory pressure (PEEP) and recruitment maneuvers in the hope that this may improve oxygenation and protect against postoperative pulmonary complications (PPCs), especially in obese patients. While anesthesiologists tend to use PEEP higher than in non-obese patients. While it is uncertain whether a strategy that uses higher levels of PEEP with recruitment maneuvers truly prevents PPCs in these patients, use of higher levels of PEEP with recruitment maneuvers could compromise intra-operative hemodynamics. The investigators aim to compare a ventilation strategy using higher levels of PEEP with recruitment maneuvers with one using lower levels of PEEP without recruitment maneuvers in obese patients at an intermediate-to-high risk for PPCs. We hypothesize that an intra-operative ventilation strategy using higher levels of PEEP and recruitment maneuvers, as compared to ventilation with lower levels of PEEP without recruitment maneuvers, prevents PPCs in obese patients at an intermediate-to-high risk for PPC.
Supraglottic airway devices (SADs) are well established in pediatric anesthetic practice. The pediatric i-gel and the self-pressurised air-Q (air-Q) are new supraglottic airway devices for children. The i-gel is made of a soft, gel-like elastomer with a noninflatable cuff. The air-Q is a new single-use device that may optimise the airway seal while reducing the potential for postoperative complications such as sore throat. The overall structure of the air-Q SP is identical to the original air-Q, except with regard to the inflatable cuff. The aim of this randomized trial was to compare the clinical performance of the i-gel and the air-Q SP.
Preoperative anxiety can be detected via structured and standardised screening by the State - Trait Anxiety Inventory (STAI) and Self rating Depression Scale (SDS) questionnaire. The investigators evaluate the relation of perioperative anxiety and heart rate variability, also the impact of general anesthesia on the change of heart rate variability.