Impact of Oropharyngeal Stimulation during Laryngeal Mask Insertion on Cardiovascular Response in adult patients. A Double-blind Clinical Trial Study.

Objective: Laryngeal mask airway (LMA) insertion has been found to reduce cardiovascular responses when compared to laryngoscopy and intubation. This research aimed to examine the impact of various techniques employed for LMA insertion on cardiovascular response.

Methods: This randomized, double-blind clinical trial included 90 elective surgery candidates divided into three groups of 30. All patients underwent similar anesthesia. The LMA was inserted using the classical technique, 180° rotation technique, and face-to-face triple maneuver technique (FFTMT). The cardiovascular responses, the success rate of LMA placement, and other outcomes were documented and compared among the three methods.

Results: The study revealed that the blood pressure of patients 10 minutes after LMA insertion using the rotational technique was higher than the standard technique (p=0.019). The pulse rate in the third (p=0.044, p=0.024) and fifth minutes (p=0.028, p=0.048) following the insertion of LMA demonstrated higher values when utilizing the FFTMT than the standard and rotational technique groups, respectively. Moreover, the incidence of sore throat following surgery in the FTFTM group was slightly greater than that observed with the standard and rotation techniques (p=0.389 and p=0.688, respectively).

Conclusion: The findings of the present investigation indicated that implementing the classic technique for LMA placement resulted in a more consistent blood pressure (BP) and pulse rate (PR) response than the 180° rotation and FFTMT. Furthermore, the classical method exhibited a marginally lower success rate in terms of LMA insertion than the alternative methods.