Document Type : Original Article


1 Anesthesiology and critical research center,Isfahan University of Medical Sciences.

2 Isfahan Medical School, Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran



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.