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Background and Aims The results of using a laryngeal mask airway (LMA) to ensure airway patency during thyroidectomy are satisfactory.

Methods Prospective randomized clinical trials were conducted in 96 patients operated on for nodal euthyroid goiter (patient’s informed consent have been obtained). Induction was carried out by bolus intravenous administration of fentanyl ), midazem and propofol . LMA was established after induction in spontaneous breathing. Administration of propofol continued as an intravenous infusion at a dose of 5 -7 mg/kg/hour until the end of the surgery. The adequacy of anesthesia was assessed by clinical observation, by studying the variables of the standard monitoring (ECG, heart rate, BP,SpO2), BIS monitoring, acid base balance (ABB) and arterial blood gas (ABG) composition and the level of cortisol in the venous blood.

Results Clinical observation showed the adequacy of anesthesia. After induction, fluctuations in peripheral circulation were not pronounced, since LMA administration is not traumatic. The surgical stage of anesthesia was achieved quickly, with a smooth course and hemodynamic stability without respiratory depression. The depth of anesthesia was easily controlled by a change in the dose of propofol drip. All quantitative indicators of standard monitoring (BP, heart rate, SpO2), ABG composition and cortisol level in venous blood were change in statistically acceptable range. LMA was removed after the completion of the surgical intervention with adequate spontaneous breathing. Complications associated with the use of LMA were not observed.

Conclusions Anesthesia with the use of LMA with preserved spontaneous breathing is an adequate method of anesthesia in thyroid surgery.