Abstract
Background: This study was performed to evaluate the hemodynamic changes of insertion of a laryngeal mask airway () or tracheal intubation in hypertensive patients. Methods: Twenty hypertensive patients, aged between 41 to 73 yrs, undergoing an elective surgery, were studied. All patients were allocated randomly to have their surgery performed with endotracheal intubation (Group ET, n = 10) or (Group PLMA, n = 10) and were studied for cardiovascular responses related to intubation or insertion. Anesthesia was induced with thiopental sodium and vecuronium intravenously. The lungs were then ventilated manually through a facemask with 1.0% enflurane in oxygen and maximal changes (%) in systolic blood pressure (SBP), diastolic blood pressure (DBP), mean blood pressure (MBP) and heart rate (HR) were measured after tracheal intubation or insertion after anesthetic induction. Results: The maximal changes (%) in SBP, DBP, MBP and HR were less in Group PLMA than in Group ET during the observation period (SBP: 7.26.8 vs 55.75.7, DBP: 7.36.3 vs 47.58.3, MBP: 7.96.9 vs 50.55.7, HR: 10.87.2 vs 48.26.1, P ＜ 0.05). Conclusions: insertion elicited less hemodynamic change than tracheal intubation in hypertensive patients.
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