Intubation; Difficult or Failed

This study aims to compare the incidence and characteristics of peri-intubation adverse airway events in critically ill trauma patients with morbid obesity versus those with super obesity, and to determine whether increasing BMI independently predicts severe peri-intubation complications.

In the "PrediSuisse" research project, the investigators aim to create a reliable, reproducible, ultra-portable and radiation-free automatized software, able to identify automatically collected features, facial characteristics, and range of movements, to predict intubation difficulty. The software will generate a difficulty intubation score tailored to three commercially available videolaryngoscopes with different type of blades, corresponding to the predicted endotracheal intubation difficulty while providing the anaesthesiologist a reliable and non-subjective tool to assess individual patient's risks with regards to airway management.

This study is being done to determine the diagnostic accuracy of the STOP-BANG questionnaire in predicting difficult mask ventilation and intubation among obese patients. During the preoperative assessment, eligible participants will be enrolled in the study. The modified Mallampati score, thyromental distance, mouth opening, and upper lip bite tests will be performed along with STOP-Bang scores. Later in the operating room, general anesthesia will be given, and bag-mask ventilation and intubation grade will be assessed and recorded. A correlation will be assessed between the difficult airway assessment findings, along with the STOP-BANG score and the bas-mask difficulty scores and intubation grades.

Patient safety is the cornerstone of anesthetic practice, and maintaining adequate respiration represents its most critical initial step. In situations where spontaneous breathing cannot be sustained-such as during general anesthesia-the airway must be mechanically secured. While simple face masks may be sufficient in some cases, endotracheal intubation remains the most reliable method for airway control in conditions associated with respiratory depression. Airway management may be challenging due to various patient-related anatomical factors, including facial and mandibular structure, obesity, limited mouth opening, facial hair, sunken cheeks, wide facial morphology, and a short or muscular neck. These challenges are collectively described as difficult ventilation and difficult intubation (cannot ventilate-cannot intubate), which may occur unexpectedly or be anticipated. A difficult airway is defined as difficulty encountered by a trained anesthesiologist in face mask ventilation, tracheal intubation, or both. Several predictors of difficult airway are widely accepted, such as thyromental and sternomental distances, neck circumference, Mallampati classification, upper lip bite test, mouth opening, and interincisor distance. Thorough preoperative airway evaluation is mandatory, as difficult mask ventilation and failed intubation remain major contributors to anesthesia-related morbidity and mortality. Although numerous studies have examined these predictors, research focusing on facial morphology and anthropometric indices-particularly the face index-is extremely limited. Facial morphology varies considerably among individuals and can be evaluated anthropometrically using simple, noninvasive tools such as a digital caliper. Anthropometric analysis is commonly applied in forensic medicine and reconstructive surgery but has rarely been incorporated into airway assessment. This study aims to introduce face index analysis as a novel predictor of difficult airway alongside conventional methods. By evaluating measurements such as trichion-gnathion distance, total facial index, upper facial index, and nasal index, the study investigates whether airway difficulty can be predicted using a single index value. All measurements are standard, noninvasive, and routinely performed during preoperative assessment.

Asses and compare the practility and the level of difficulty in using C-mac and pentax video-laryngoscopes or the traditional Macintoch laryngoscope in intubation in ICU patients while wearing face shield

Tracheal intubation in the intensive care unit (ICU) is associated with high incidence of difficult intubation and complications. Videolaryngoscopes (VLs) devices have been proposed to improve airway management, and the use of VLs are recommended as first-line or after a first-attempt failure using direct laryngoscopy in ICU airway management algorithms. Although until relatively few years ago there were doubts about whether videolaryngoscopes had advantages over direct laryngoscopy for endotracheal intubation (ETI) in critically ill patients, two recent studies (DEVICE (1), INTUBATE (2)), and a Cochrane review (3) have confirmed that videolaryn should be used?, and what is the best blade? . There are two types of blades commonly used with videolaryngoscopes: the "Macintosh" blade with a slight curvature, and hyperangulated blades. The "Macintosh" blades have a lower angle of vision, but they have the advantage of being similar to the blades commonly used in direct laryngoscopy, making them easy to use for the person performing the ETI. Hyperangulated blades have a greater angle of vision, improving glottic visualization, especially in patients with an anterior glottis. However, the need to overcome this angulation could potentially hinder the passage of the endotracheal tube to the vocal cords. It is unknown if either blade has any advantage for intubating critically ill patients.

Although VLs improve glottic visualization, on many occasions it may not be accompanied by intubation at the first attempt, because the endotracheal tube has to pass a sharp angle to enter the trachea. To avoid this limitation, a new flexible tip bougie is designed to flexibly navigate the distal tip and help facilitate precise insertion of the endotracheal tube in the trachea. The flexible tip bougie has an integrated slider along the surface which moves the tip anterior and posterior while the pre-curved distal portion of shaft allows the angulation to provide anterior flexion. This new flexible tip bougie could be used as a rescue when first intubation failure using the videolaryngoscopy, or as a first option to improve the percentage of patients intubated at the first attempt.

Indirect video laryngoscope tracheal intubation with the GlideScope (Verathon Inc., Bothell, USA) has become a well-established technique in emergency and clinical anaesthesia, offering first-pass intubation success rates comparable to those achieved with direct laryngoscopy. Different video laryngoscopes vary significantly in design, including blade shape, mobility, and camera operation, which can affect patient outcomes. Two video laryngoscopes with hyperangulated blades include the GlideScope (Verathon Inc., Bothell, USA) and the visionPRO (HEINE® Optotechnick, Gilching, Germany). The Glidescope comprises an external monitor connected to a medical-grade plastic handle which is compatible with reusable and disposable blades. The newer visionPro comprises a reusable anodized aluminum integrated monitor that is attached to the camera/handle which is compatible with disposable blades. The hyperangulated blade of the VisionPro is a unique combination of previously designed laryngoscope blades meant to increase performance. The introduction of this new hyperangulated blade design in the VisionPro raises the need to compare its performance against the established GlideScope. The aim of this pilot study is to generate initial data to evaluate whether the use of the visionPRO (HEINE® Optotechnick, Gilching, Germany) provides a non-inferior first-pass success rate compared with the GlideScope (Verathon Inc., Bothell, USA) in surgical patients with an expected normal airway undergoing general anaesthesia The investigators hypothesize that tracheal intubation using the HEINE visionPRO will achieve a similar frequency of failed intubation and airway complications. This study plans to recruit 100 patients.

Morbid obesity is a growing disease. Intubations of these patients mostly difficult. Video laryngoscopes have to be used during the intubation of these patients. The intubation of men is more complicated and difficult than obese women. There were no trials compared to the new video laryngoscopes in morbidly obese men. Patients will be divided into two groups; non-obese and klas 2-3 obese. Airtraq will be used for their intubation. The time for intubation will be the primary aim of this prospective randomized study. The insertion time, perioperative hemodynamic variables, and postoperative complications will also be recorded.

This study aims to train an AI for video-directed endotracheal intubation (VITION) to recognise the anatomical structures of the upper airway during video-directed endotracheal intubations.

In order to improve intubation conditions in burn children, our aim is to investigate the efficacy of transnasal humidified rapid-insufflation ventilatory exchange technique（THRIVE) in children aged between 0 and 18 years who with head, face, and neck injuries by fire, scalding, chemical, electric,explosions, and others. We hypothesise that THRIVE increases first attempt success without hypoxemia in intubation of children and compared with routine practice. Does the THRIVE can prolong apnoea time and delay the onset of desaturation to increase the success rate of the first tracheal intubation without desaturation? Researchers will compare THRIVE group with Routine care group to see successful intubation on the first attempt without desaturation. Participants will received intravenous anesthesia induction, followed by 2-3 minutes preoxygenation, before intubation, the mask was removed from the children's face and a THRIVE nasal plug was placed. During intubation, the Routine care group had no oxygen supply,and the THRIVE group will be maintained throughout the apnoeic period with selected flow rates during intubation attempts.