Hemodynamic changes occurring with tracheal intubation by direct laryngoscopy compared with intubating laryngeal mask airway in adults: A randomized comparison trial

AbstractBackgroundHemodynamic changes are major problems due to general anesthesia. We designed a prospective randomized study to compare the hemodynamic responses due to direct laryngoscopy (DL) and intubating laryngeal mask airway (ILMA).MethodsSeventy adult ASA-I and ASA-II patients referred to anesthesia department were randomly divided into two groups: direct laryngoscopy (Macintosh laryngoscope) and ILMA. Systolic, diastolic and mean arterial blood pressure and heart rate were recorded at baseline, preintubation, 1, 3 and 5 min after intubation following intubation. Also some complications including sore throat, laryngospasm, hoarseness and cough were evaluated.ResultsMean age of studied patients in DL group (including 11 (31.4%) male) was 35.5±12.2 and 35.5±9years old in ILMA group (including 16 (45.7%) male). There was no significant difference between two studied groups about measured hemodynamic indices (P<0.05, CI=95%). The results showed that the just difference between increment of diastolic blood pressure and mean arterial pressure after 5min interval of two studied groups was significant (P=0.04; P=0.034). There was no significant difference between the number of patients with positive complications and those without them (P