Comparison Of The Effects Of Two Methods Of Using Lidocaine Gel And Lubricant Gel During Placement Of A Laryngeal Airway Mask On Hemodynamic Symptoms During Orthopedic Surgery

Background:Complications of intubation are almost common and include up to ۴% of all patients, LMA is used to maintain the airway and spontaneous breathing or control during short-term surgeries. During surgery, patients experience hemodynamic changes in systolic and diastolic blood pressure and heart rate after inflating the LMA tube cuff. Therefore, the present study was conducted with the aim of comparing the effect of two methods of using lidocaine gel and lubricant gel during placement of a laryngeal airway mask on hemodynamics during orthopedic surgery. Methods: This study was a double-blind randomized controlled clinical trial that was conducted during a one-year period from ۲۰۲۱ to ۲۰۲۲ in patients referred to Shahid Mohammadi Hospital for orthopedic surgery. Patients were randomly divided into two groups of ۵۰ patients (lubricant gel group and lidocaine gel group during LMA operation). When the patient entered the operating room and was placed on the operating bed, the patient's vital signs including systolic, diastolic, mean arterial blood pressure and heart rate were checked before the start of anesthesia. The mentioned vital signs were checked before induction, one minute, five minutes, thirty minutes and upon entering the recovery room and recorded in the data collection form. Results: The results showed that the studied groups did not have significant differences in terms of factors affecting the response to drugs such as age and gender. Also, hemodynamic changes in both groups were not statistically significant (P>۰.۰۵). Conclusion: In terms of hemodynamic changes, the use of lidocaine gel during LMA operation in patients undergoing orthopedic surgery was not observed with the group using lubricant gel.