Author(s)

Hirbo Samuel¹, Abateneh Melekamayhu¹, Misrak Woldeyohannes¹, Siryet Tesfaye¹, Tewoderos Shitemaw^2*

¹Department of Anesthesia, College of Medicine and Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia.
²Department of Anesthesia, Arba Minch Health Science College, Arba Minch, Ethiopia.

Introduction: Laryngoscopic intubation is an insertion of endotracheal tube into the trachea for maintenance of airway during general anesthesia. Smooth intubation requires attenuation of pressor responses and maintenance of baseline hemodynamic stability. The primary outcome of this study is to compare intravenous fentanyl and lidocaine as an anesthetics adjuvant on attenuation of hemodynamic pressor responses to Laryngoscopic intubation in elective surgical adult patients. Methods: This prospective cohort study recruits 114 patients who underwent elective surgery under general anesthesia with laryngoscopy and endotracheal tube intubation. The study was conducted from January 1, 2018 to March 30, 2018. Systemic random sampling technique was used to select the study participants. Those patients that received intravenous fentanyl 2 micrograms per kilogram three minutes before intubation as an anesthetics adjuvant are considered as Fentanyl-group (group F). The Lidocaine-group (group L) was those patients who receive 2% intravenous lidocaine 1.5 milligrams per kilogram three minutes before intubation as anesthetics adjuvant. Hemodynamic parameters (heart rate and blood pressure) and other variables were documented starting from 3 minutes before intubation to 5 minutes after intubation. Results: The mean heart rate at first minute after intubation was significantly lower in fentanyl group (98.91 ± 15.6 beats per minute (bpm)) compared to lidocaine (107 ± 15.45 bpm), t (112) = 2.8, p = 0.006. Systolic blood pressure was also significantly lower in fentanyl group (141.9 ± 18.9 millimeters of mercury (mmHg)) compared to lidocaine (150 ± 18.098 mmHg), t (112) = 2.45, p = 0.016 at first minute after intubation. At third minute after intubation, heart rate was significantly lower in fentanyl group compared to lidocaine, t (112), p = 0.037. No difference was in heart rate and blood pressure among the group at 5^th minute after intubation (p > 0.05). Conclusion and Recommendations: Fentanyl was better on attenuation of hemodynamic pressor responses to laryngoscopic intubation when compared to lidocaine. Therefore, using fentanyl pre-operatively to attenuate pressor responses especially during intubation is important.

Fentanyl, Hemodynamic Parameters, Hemodynamic Pressor Responses, Laryngoscopic Intubation, Lidocaine

Samuel, H. , Melekamayhu, A. , Woldeyohannes, M. , Tesfaye, S. and Shitemaw, T. (2019) A Comparative Study between Intravenous Fentanyl and Intravenous Lidocaine on Attenuation of Hemodynamic Pressor Responses to Laryngoscopic Intubation: A Prospective Cohort Study, Ethiopia. Open Journal of Anesthesiology, 9, 167-178. doi: 10.4236/ojanes.2019.99016.