Green Tea Gargling Effect on Cough & Hoarseness After Coronary Artery Bypass Graft

Abstract

Introduction:Endotracheal intubation is a method necessary for controlling and maintaining airway during general anesthesia. Cough and hoarseness are common complications after endotracheal intubation. Inflammation has an important role in postoperative cough and hoarseness outbreak. Also it has been stated that green tea has anti-inflammatory properties. Therefore, the current study has been conducted to investigate green tea gargling solution effect on cough and hoarseness after coronary artery bypass graft (CABG) surgery.Methods:In this single-blind, randomized, & controlled clinical trial, we enrolled 121 patients undergoing CABG admitted to the ICU. The intervention group participants were asked to gargle 30 cc of green tea solution. The control group patients gargled 30 cc of distilled water. An hour after extubation, the intervention group patients were asked to gargle 30 cc of green tea and the control group patients were required to gargle 30 cc of distilled water every 6 hour up to 24 hour (each patient for 4 times). Moreover, the cough and hoarseness questionnaire was also filled in 6, 12, and 24 hours after endotracheal extubation.Results:The results showed no significant differences among the patients in both groups regarding age, gender, body mass index, smoking history, and anesthesia duration. There was a significant difference between the two groups in terms of cough 12 hours after removing the endotracheal tube. At other times, there was no significant difference between the two groups considering cough and hoarseness.Conclusion:The present study results showed that green tea gargling does not decrease hoarseness. Though, cough occurrence was less in the intervention group than the other group.

Effect of Licorice and Green Tea Gargle on Post-Extubation Sore Throat, Cough, and Hoarseness: A Triple-blind Clinical Trial

“…In a study by Ariaei et al, gargling with green tea solution four times a day after anesthesia by patients undergoing open-heart surgery reduced sore throat, 12 hours after the intervention. However, no signi cant change was observed in the hoarseness variable in three stages [16]. This lack of consistency might be due to the long surgery period (8-10 hours), compared to the present study.…”

“…Therefore, many have turned to complementary medicine owing to its low cost and fewer complications [14].One of the complementary medicine methods is phytotherapy, which uses the plant itself or its essential oil (aromatherapy) [15]. Moreover, researchers have used various phytotherapy methods to reduce extubation complications, such as green tea gargle [16], Licorice gargling [17], and Oucalyptus inhalation and reporting different results [2].…”

“…For instance, Ibrahim and Anis reported that Ketamine and Licorice gargle equally reduced the incidence and severity of sore throat due to intubation [27]. In a study by Ariarifar et al, green tea gargle following extubation in patients undergoing open-heart surgery reduced sore throat and cough but had no signi cant impact on hoarseness [16]. Another study showed the positive effect of Licorice gargle on the decrease of sore throat and cough in patients after a Laminectomy [17].…”

The Effect of Softening of Endotracheal Tubes on the Decrement of Postoperative Hoarseness and Sore Throat

“…One of the important causes of hoarseness has been reported to be direct trauma to vocal cords and its inflammation caused by endotracheal intubation. It has been stated that intubation can even cause vocal cord paralysis (6). So far, various drug and non-pharmacological methods have been used to reduce the complications of the tracheal tube, including the use of dexamethasone (7) and lidocaine gel (8), as well as the use of betamethasone gel (9) and gargling of green tea after removal of tracheal tub.…”