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NCT03502590
It is known that patients with head and neck cancer who have had radiation therapy to the structures of the neck are at a greater risk of difficult mask ventilation and tracheal intubation than the majority of patients undergoing general anaesthesia. Failure to maintain oxygenation can lead to catastrophic consequences for any patient undergoing general anaesthesia, such as severe hypoxic brain injury and death. As such, the current guidelines from the Difficult Airway Society promote the use of a second generation laryngeal mask airway to maintain oxygenation in the event of failed mask ventilation or tracheal intubation, a rescue technique that has in most patient groups a very high chance of success. Unfortunately these guidelines are by necessity generic guidance and do not take into account the clinical performance of these devices in specific patient groups. While there is evidence of the effectiveness of the IGEL device as the primary method of airway maintenance in many studies there are none that describe its clinical performance in a group of patients in whom the rate of failed mask ventilation and tracheal intubation are significantly higher than the general population of patients. It is therefore of great interest to have an idea of the likelihood of success of rescue ventilation with this device in a group of high risk patients.
NCT07196137
The primary objective of the study is to evaluate gastric insufflation during the use of two different airway devices (Laringeal Tube Suction and Air Q sp3G Laryngeal Mask. The secondary objectives of the study are to assess these two airway devices in terms of perioperative complications.
NCT03028896
The 90° rotation technique is known to improve the success rate of conventional LMA but its effect in LMA FlexibleTM is not known. We tried to find if 90° rotation technique could increase the first attempt success rate of the insertion of LMA FlexibleTM compared to standard technique.
NCT04206592
Prospective, controlled, randomized study to compare Ambu AuraGain with Intersurgical i-Gel mask during mechanical ventilation in patients undergoing laparoscopic cholecystectomy. The investigators hypothesise that when comparing the Ambu® AuraGainTM with Intersurgical i-GelTM mask, the Ambu® AuraGainTM would exhibit a higher oropharyngeal leak pressure (OLP) during mechanical ventilation in patients undergoing laparoscopic cholecystectomy. The main goal is to compare the Ambu AuraGain with the i-Gel in terms of safety and efficacy during mechanical ventilation in critical phase of the pneumoperitoneum in lateral decubitus and reverse trendelemburg position. Secondary objectives are comparing insertion time, number of attempts, ventilatory airway peak pressure, time and success rates for gastric tube insertion and the incidence of side effects.
NCT03619057
The choice of the size of the laryngeal mask (i-gel) is based on the weight. Even following the weight recommendations, it is quite common to choose a mask that is too big or too small, which leads to ventilation leaks (too small), or insertion failures (too big) and leads to a change of mask for bigger or smaller. The i-gel are laryngeal masks (2nd generation) which consist of gel and have been designed by molding on larynx corpses. The masks are not inflatable (so not adaptable). I-gel masks are used in adult and pediatric patients for weights ranging from 2 Kg to over 90 Kg to provide ventilation during general anesthesia. Patients with a deep voice probably need a larger laryngeal mask than their weight alone suggests. The investigators propose to measure the lowest sound emitted by the patient because it would seem logical that the larger the larynx is, the more the voice is serious. This hypothesis will be verified a posteriori by the size of the laryngeal mask used and adapted by comparing it to the range of the voice.
NCT03118596
The study aims to establish which of the two second generation Supraglottic Airway Devices, the I-gel or the the laryngeal ask airway (LMA) Protector, is best suited to be used as a conduit to fibreoptic bronchoscope assisted tracheal intubation. The primary outcome of this will be the time to complete the tracheal intubation.
NCT03006250
The effects of desflurane versus sevoflurane in adult patients undergoing LMA anesthesia on respiratory events during a less than 2-hour elective surgery.
NCT02618525
BACKGROUND AND OBJECTIVES The purpose of this study is to assess whether the loss of motor response to supraorbital pressure can be an alternative to that of jaw thrust to predict optimal condition for laryngeal mask airway (LMA) insertion in children. METHODOLOGY Fifty children (ASA I-II), aged 2 to 10 years, scheduled to receive general anesthesia that required LMA insertion were randomized to receive either supraorbital pressure (SOP) (n = 25) or jaw thrust (JT) (n = 25), after the loss of verbal response and body movements with a standard anesthetic. When motor response to the study intervention was absent, the LMA was inserted.
NCT03528590
Currently, the main method for selecting an i-gel® size is based on the body weight recommendation (30-60 kg for size 3 and 50-90 kg for size 4) according to the manufacturer's recommendation. However, there is an overlapping in size selection in people weighing between 50 and 60 kilograms. Laryngeal mask airways are widely used for breast surgery, and this patient cohort is often weighed between 50-60 kilograms in National Taiwan University Hospital. Therefore, in this randomized clinical trial, the investigators will compare the ventilation efficacy of size 3 and size 4 i-gel® in anesthetized, paralyzed female patients weighing 50 to 60 kilograms who undergo breast surgery. Also, the investigators will record any side effects of size 3 and size 4 i-gel® in this cohort.
NCT02938039
This study will guide the anesthetists regarding the appropriate selection of the LMA in neonatal age group based on scientific basis. This study will add up to existing literature about the safety of LMA usage in neonates and infants. Furthermore it may shed some light on which LMA type will be more feasible and effective for neonatal/ infants usage.