Comparison of the Pentax AirwayScope and McGrath MAC videolaryngoscope for endotracheal intubation in patients with a normal airway

Abstract

Various videolaryngoscopes (VLs) have been developed to provide a better laryngeal view and facilitate difficult intubations. The goal of this study was to compare 2 VLs, the Pentax AWS and the McGrath VL, with respect to intubation time and ease of intubation.One hundred forty patients aged 19 to 65 years (American Society of Anesthesiologists classification I or II), who required tracheal intubation for elective surgery, were randomly assigned to 1 of the 2 groups: the Pentax AWS (n = 70) or the McGrath VL (n = 70). The primary outcome was time to intubation (TTI) measured by a blind observer. The intubation difficulty scale (IDS), percentage of glottic opening (POGO) scale, glottic grade, use of optimal external laryngeal manipulation (OELM), and ease of intubation were also recorded.The Pentax AWS provided a better laryngeal view than the McGrath VL with respect to the Cormack-Lehane (CL) glottic grade (1/2a/2b) (63/7/0 vs 43/24/3, P < .001) and the POGO scale (median [interquartile range, IQR]) (100 [100–100] vs 100 [80–100], P < .001). The IDS was significantly lower in the Pentax AWS group compared with the McGrath VL group (median [IQR]) (0 [0–0] vs 0 [0–1], P < .001). However, the TTI was similar in both the Pentax AWS and McGrath VL groups (median [IQR]) (30 [27–34] vs 32 [27–35] seconds, P = .440). OELM and ease of intubation were also similar between the 2 groups.The Pentax AWS offered a superior laryngeal view compared with the McGrath VL. There was no significant difference in either the intubation time or ease of intubation using these 2 devices in patients with normal airways.

Randomized comparison of McGrath MAC videolaryngoscope, Pentax Airway Scope, and Macintosh direct laryngoscope for nasotracheal intubation in patients with manual in-line stabilization

“…In a previous study comparing MVL and PVL during orotracheal intubation, although PVL provided superior glottic view over MVL, the TTI and ease of intubation were similar between the two devices. 25 Second, it may be difficult to direct the tube tip into the glottis. PVL is designed for orotracheal intubation, while the ETT is inserted into the channel during intubation.…”

“…The physicians' familiarity with MVL might have reduced the intubation times, especially in patients with MILS that simulated difficult airway conditions. Since experienced anesthetists were able to achieve similar intubation times and ease of intubations with PVL and MVL in patients with normal airways, 25 further studies about the experience of intubation with VLs are needed. Third, the blade tip of PVL was positioned behind the epiglottis for direct elevation in our study.…”

Comparisons of Videolaryngoscopes for Intubation Undergoing General Anesthesia: Systematic Review and Network Meta-Analysis of Randomized Controlled Trials

“…The characteristics of the included studies are shown in Table 1 [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 ,…”

Tracheal intubation with the McGrath MAC X-blade videolaryngoscope in morbidly obese and nonobese patients

“…We based our sample size according to Yumul et al [12]. They used the McGrath MAC in morbidly obese patients and they found the total intubation time to be 62 ± 31 s. Lee et al [13] used the McGrath MAC in normal patients and found the total intubation time of nonobese patients to be 32 (27)(28)(29)(30)(31)(32)(33)(34)(35) s. Based on this data, for a = 0.05 and b = 0.2 we calculated our sample size as 40 patients in each group. Continuous data were examined for normal distribution with the Kolmogorov-Smirnov test.…”