The McGrath^® Series 5 videolaryngoscope vs the Macintosh laryngoscope: a randomised, controlled trial in patients with a simulated difficult airway

Abstract

Summary We compared the McGrath® Series 5 videolaryngoscope with the Macintosh laryngoscope in a simulated difficult airway, using manual in‐line stabilisation in 88 anaesthestised patients of ASA physical status 1‐2. The primary outcome was laryngoscopic view. Secondary outcomes included rates of successful tracheal intubation and complications. A Cormack and Lehane grade‐1 or ‐2 view was found in all patients when using the McGrath compared with 45 (51%, p < 0.0001) using the Macintosh laryngoscopes. The mean (SD) percentage of glottic opening was 82 (23)% using the McGrath compared with 13 (23)% using the Macintosh (p < 0.0001). In 66 out of 88 patients (75%), the McGrath improved the glottic view by one to three grades compared with the Macintosh (p < 0.001). Intubation of the trachea was successful in all patients using the McGrath, while the Macintosh was successful in 26 (59%, p < 0.001). There was no significant difference in the complication rates between the devices.

Comparison of the conventional Macintosh laryngoscope, the Pentax Airwayscope, and the McGrath MAC video laryngoscope under restricted cervical motion: a manikin study

“…It has been reported that the McGrath Series 5 video laryngoscope could not always reduce the TTI even when a clear view of the glottis was achieved. 3 For the McG, the visual field direction and laryngeal axis are not aligned (Fig. 3C).…”

“…The angle of the McG blade relative to the axis of the trachea improves the view of the glottis on the monitor; however, it is necessary to redirect the endotracheal tube more anteriorly, and doing so can make it difficult to successfully achieve tracheal intubation. 3 In order to advance the endotracheal tube into the trachea, it is necessary to bend the styletted endotracheal tube to a greater degree than with the MCL. As a result, the TTIs were prolonged in spite of the higher SRs of the intubations.…”

“…It has been reported that the McGrath Series 5 video laryngoscope (Aircraft Medical, Edinburg, UK), which is similar to the McG, can improve glottis visualization in patients whose cervical movements were restricted manually. 3 Here, we hypothesized that the McG could also facilitate endotracheal intubation in trauma cases, and we compared the utility of MCL, AWS, and McG using a manikin.…”

The McGrath Series 5 video laryngoscope versus the Macintosh laryngoscope: a randomized trial in obstetric patients

“…The present study revealed an intubation time of 47. among studies (6,9,12). While conducting an orotracheal intubation with the McGrath video laryngoscope, a stylet has to be used for the orotracheal tube.…”

“…There are several video laryngoscopes in clinical use; however, only limited comparative studies have been conducted to evaluate the exact performance of these devices (5)(6)(7)(8)(9)(11)(12)(13)(14)(15)(16)(17). Hence, we compared the McGrath Series 5 video laryngoscope and the Macintosh laryngoscope in patients who underwent cesarean section.…”