Hemodynamic response to laryngoscopy and endotracheal intubation with conventional macintosh laryngoscope versus C-MAC video laryngoscope in patients undergoing elective coronary artery bypass grafting: A randomized controlled trial
Document Type
Article
Department
Anaesthesia
Abstract
Background: Laryngoscopy and endotracheal intubation evoke significant hemodynamic responses, particularly in patients undergoing coronary artery bypass grafting (CABG) who have compromised cardiac reserves. This study aimed to compare the hemodynamic effects of the C-MAC video laryngoscope (VL) with those of the conventional Macintosh laryngoscope (MC) in patients undergoing elective CABG.
Methods: This randomized controlled trial included 86 patients scheduled for elective CABG, who were randomly assigned to intubation with either the MC group or the C-MAC VL group. Hemodynamic parameters, including heart rate, systolic, diastolic, and mean arterial pressures, were recorded at five time points (prelaryngoscopy baseline to 10 min postintubation). Secondary outcomes included the intubation success rate, duration of laryngoscopy and intubation, glottic visualization, and complications.
Results: Two-way repeated measures ANOVA revealed no significant group effect or group-by-time interaction for any hemodynamic variable (all p > 0.05), confirming equivalent hemodynamic profiles across all time points. A significant time effect was observed for all variables (all p < 0.001). First-attempt intubation success was 88.4% (VL) versus 74.4% (MC) (p = 0.166). The C-MAC provided significantly better glottic visualization (modified CL grade, p < 0.001). No major complications occurred in either group.
Conclusion: In patients undergoing CABG, C-MAC VL and conventional MC result in similar hemodynamic responses. The choice of laryngoscope may be guided by airway considerations and operator experience rather than anticipated cardiovascular effects.
Publication (Name of Journal)
Anesthesiology Research and Practice
DOI
10.1155/anrp/2771364
Recommended Citation
Khan, S.,
Hameed, M.,
Khan, W. R.,
Yousuf, M. S.,
Samad, K.
(2026). Hemodynamic response to laryngoscopy and endotracheal intubation with conventional macintosh laryngoscope versus C-MAC video laryngoscope in patients undergoing elective coronary artery bypass grafting: A randomized controlled trial. Anesthesiology Research and Practice, 2026(1), 1-7.
Available at:
https://ecommons.aku.edu/pakistan_fhs_mc_anaesth/597