The usefulness of the McGrath MAC laryngoscope in comparison with Airwayscope and Macintosh laryngoscope during routine nasotracheal intubation: a randomaized controlled trial

Abstract

BackgroundMcGrath MAC video laryngoscope offers excellent laryngosopic views and increases the success rate of orotracheal intubation in some cases. The aim of this study was to determine the usefulness of McGrath MAC for routine nasotracheal intubation by comparing McGrath MAC with Airway scope and Macintosh laryngoscope.MethodsA total of 60 adult patients with ASA physical status class 1 or 2, aged 20–70 years were enrolled in this study. Patients were scheduled for elective oral surgery under general anesthesia with nasotracheal intubation. Exclusion criteria included lack of consent and expected difficult airway. Patients were randomly allocated to three groups: McGrath MAC (n = 20), Airway scope (n = 20), and Macintosh laryngoscope (n = 20). After induction, nasotracheal intubation was performed by six expert anesthesiologists with more than 6 years of experience.ResultsThere were no significant differences in preoperative airway assessment among the three groups. Successful tracheal intubation time was 26.8 ± 5.7 (mean ± standard deviation) s for McGrath MAC, 36.4 ± 11.0 s for Airway scope, and 36.5 ± 8.9 s for Macintosh laryngoscope groups. The time for successful tracheal intubation for McGrath MAC group was significantly shorter than that for Airway scope and Macintosh laryngoscope (p < 0.01). McGrath MAC significantly improved the Cormack Lehane grade for nasotracheal intubation compared with Macintosh laryngoscope (p < 0.05).ConclusionMcGrath MAC significantly facilitates routine nasotracheal intubation compared with Airwayscope and Macintosh laryngoscope by shortening the tracheal intubation time and improving the Cormack Lehane grade.Trial registrationUMINCTR Registration number UMIN000023506. Registered 5 Aug 2016.

A randomized controlled comparison of non-channeled king vision, McGrath MAC video laryngoscope and Macintosh direct laryngoscope for nasotracheal intubation in patients with predicted difficult intubations

“…It has an angulated single-use blade without a guiding channel. It was reported to facilitate routine NTIs in normal patients compared with Macintosh laryngoscope [11, 12]. The King Vision VL (Fig.…”

A comparison between the Disposcope endoscope and fibreoptic bronchoscope for nasotracheal intubation: a randomized controlled trial

“…Fibreoptic bronchoscopy-guided NTI is associated with less epistaxis and better navigability and has a lower redirection rate [3]. In other studies, compared with the Macintosh laryngoscope, fibreoptic bronchoscopy-guide NTI resulted in a lower rate of sore throat and significantly shortened the total intubation time, and improved field of view during intubation and shortened intubation time were reported for the McGrath MAC laryngoscope [4, 5].…”

GlideScope® cobalt video laryngoscope versus direct Miller laryngoscope for lateral position-tracheal intubation in neonates with myelodysplasia: A prospective randomized study

“…Recently, a proliferation of new devices for infants has been introduced into the market as scaled-down versions of the adult counterparts. [ 16 17 ] GVL, with a 60° angulation blade and digital camera at its distal end, allows glottis visualization without alignment of the laryngeal, pharyngeal, and oral axes. Furthermore, GVL can improve viewing the glottis by providing a more anterior laryngeal exposure.…”

“…Video laryngoscopes have been proved to be superior for intubation in children with difficult airway when compared with traditional DLs in supine position. [ 5 16 ] However, further investigations are needed to compare the performance of video laryngoscopes versus conventional DLs in pediatric population with difficult airways in lateral position. Other limitations to our study were the unfeasibility of blinding, probability of certain bias because POGO score and best view are subjective tools, and unmeasured train of four before laryngoscop y, but we considered 90 seconds after rocuronium injection adequate to assure good intubation condition.…”