Comparison of sorethroat incidence after tubal ligation in three anesthesia techniques

Background: Sore throat is one of the unpleasent complications of anesthesia, which causes dissatisfaction of patients. Objective: To determine the incidence rate of sorethroat after tubal ligation and comparing it in three anesthesia techniques. Methods: Through a prospective clinical trial 150 patients operated for tubal ligation in March 2002 to June 2002 in Kosar Hospital, randomely divided into three groups. Premedication, induction and maintenance of anesthesia used for three groups, were equall. But ventilation methods used for groups A, B and C was mask, trachecal tube and Tashayod tube respectively. 24 hours after anesthesia, patients were asked through a questionaire for the sorethroat symptom. Questionaires were analysed using SPSS software. Findings: 29 patients (19.3%) out of 150 patients under study had sorethroat, that 15 of them belong to group C (51.7%), 10 to group B (34.9%) and 4 to group A (13.8%). This study showed that 8% of patients in group A, 20% in group B, and 30% in group C had sorethroat. These differences were meaningful from statistical point of view (K2 = 7.78 , df = 2 , P=0.0204) but the difference of percentage of sorethroat incidience in groups B and C were not significant (K2 = 0.085 , d = 1 , P=0.36). There was no direct relation between age of patients, duration of operation and sorethroat (P > 0.05). Conclusion: Incident of sorethroat using mask ventilation is less than other methods. But it is almost equal in other two methods.