Introduction: One of the complications of laryngoscopy and endotracheal intubation is sympathetic stimulation with hemodynamic changes that are always tried to be avoided by anesthesiologists. The aim of this study is to review and compare hemodynamic changes caused by both conventional and video laryngoscopy.
Methods: In this clinical trial performed in 2015 in the Birjand-based Imam Reza Hospital, a total of 42 patients were enrolled by census, 21 patients were intubated by direct laryngoscopy and 21 using video laryngoscope. The mean arterial blood pressure, systolic and diastolic blood pressure, pulse rate, and arterial oxygen saturation 2 minutes after induction and after intubation were checked. The data were subsequently analyzed in SPSS software (version 22) using independent T-test and Chi-square. The significant level was set at P <0.05.
Results: According to the findings in this study, the average score of systolic blood pressure after direct intubation was significantly higher than intubation by glidescopy (139.00±22.47 versus 90.00±16.89). The mean arterial blood pressure after intubation by glidescopy was 96.34±13.16 and in direct laryngoscopy, it was 101.60±15.53 with no significant difference between the two. The mean heart rate in the glidescopy group was 104.86±15.79 and in the laryngoscopy group, it was 104.48±16.37, which is not significantly different between the groups.
Conclusions: Compared with video laryngoscopy, the direct laryngoscopy can significantly increase the mean systolic arterial blood pressure in patients, which can lead to fatal complications. Therefore, it is advisable to use glidescopy technique for intubation in high-risk patients.

Keywords: Hemodynamics, Intubation, Laryngoscopy, Surgery

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