Hemodynamic responses to insertion of the laryngeal mask airway versus Combitube
Hormozgan Medical Journal: February 01, 2017, 20 (6); e87342
April 12, 2016
Article Type: Research Article
December 09, 2015
April 12, 2016
S , Khosravi
F , Jarineshin
H . Hemodynamic responses to insertion of the laryngeal mask airway versus Combitube,
Hormozgan Med J.
Introduction: One of the most common problems during laryngoscopy involves
sympathetic system stimulation and the subsequent hemodynamic changes. It is a key
measure to maintain the hemodynamic stability of patients with cardiovascular diseases
during induction of anesthesia. This study attempted to compare the hemodynamic effects
of laryngeal mask airway and combitube.
Methods: This prospective clinical trial was conducted on a total of 142 candidate
patients 18 to 60 years of age with ASA I and II undergoing elective surgery. Patients
were randomly divided into three groups: (1) mask ventilation (control group) (2)
laryngeal mask airway and (3) combitube. At the next stage, the systolic and diastolic
blood pressures and heart rates were measured at the following points in time: baseline,
after induction of anesthesia and before airway manipulation, 1, 3 and 5 minutes after
ventilation. The findings were analyzed and P<0.05 was considered significant.
Results: Patients in all three groups were closely matched in terms of age, height,
weight, sex and Mallampati score. The duration of combitube insertion was significantly
longer than that of laryngeal mask airway (LMA) (P<0.05). The baseline and postinduction
hemodynamic variables were similar in the three groups. The hemodynamic
variations at the first minute were higher in the combitube group than the other two. At
minute 3, the hemodynamic parameters in Groups 2 and 3 were significantly higher than
those in Group 1. Moreover, diastolic blood pressure in Groups 2 and 3 was higher than
that in Group 1 in the 5th minute.
Conclusion: LMA insertion leads to lower hemodynamic responses in patients during
airway management compared to combitube. This is can be an important issue in
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