Does Strepsils® With Lignocaine Lozenges Reduce Post Operative Sore Throat Due To Supraglottic Airway Devices

Summary

The primary objective of this study is to assess the effect of preoperative administration of oral Strepsils® with added Lignocaine lozenges on the incidence of postoperative sore throat (POST) after general anaesthesia using a Supraglottic Airway Device (SAD). Patients undergoing surgery with general anaesthesia will require ventilation of their lungs with either a flexible tube placed beyond the voice box called an endotracheal tube (ETT) or a tube placed above the voice box called a Supraglottic Airway Device. This tube helps oxygenate the patient and delivers anaesthetic gas to the lungs. The procedure is invasive and uncomfortable, and one of the most common complaints is a sore and inflamed throat after the tube is taken out. This is termed postoperative sore throat (POST). The incidence of POST after SAD is comparable with the ETT and though many studies have focused on ETT, few have examined the SAD. After written informed consent is received in pre-op, a sealed and coded envelope with either the Strepsils lozenges or the placebo lozenges will be given to the patient to be administered orally, with the instruction to dissolve the lozenge by sucking on it 45 minutes prior to surgery. Upon completion of surgery and emergence from general anaesthesia, the patient will be assessed regarding the incidence and severity of sore throat, difficulty in swallowing and difficulty in speaking by the investigator using an interview format. The severity of these symptoms will be graded on a 4-point scale ranging from 0 to 3; 0 being no symptoms, 1 being mild symptoms, 2 being moderate symptoms, and 3 being severe symptoms. This evaluation will be performed at 30 minutes and 24 hours post removal of SAD.

Timeline

Start

2019-01-17

Primary completion

2019-08-31

Completion

2019-08-31

Publications

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• Background Weckmann G, Hauptmann-Voss A, Baumeister SE, Klotzer C, Chenot JF. Efficacy of AMC/DCBA lozenges for sore throat: A systematic review and meta-analysis. Int J Clin Pract. 2017 Oct;71(10). doi: 10.1111/ijcp.13002. Epub 2017 Sep 4.
• Background Ebneshahidi A, Mohseni M. Strepsils(R) tablets reduce sore throat and hoarseness after tracheal intubation. Anesth Analg. 2010 Oct;111(4):892-4. doi: 10.1213/ANE.0b013e3181d00c60. Epub 2010 Feb 8.
• Background Gupta D, Agrawal S, Sharma JP. Evaluation of preoperative Strepsils lozenges on incidence of postextubation cough and sore throat in smokers undergoing anesthesia with endotracheal intubation. Saudi J Anaesth. 2014 Apr;8(2):244-8. doi: 10.4103/1658-354X.130737.
• Background Smith I, Kranke P, Murat I, Smith A, O'Sullivan G, Soreide E, Spies C, in't Veld B; European Society of Anaesthesiology. Perioperative fasting in adults and children: guidelines from the European Society of Anaesthesiology. Eur J Anaesthesiol. 2011 Aug;28(8):556-69. doi: 10.1097/EJA.0b013e3283495ba1.
• Background Ouanes JP, Bicket MC, Togioka B, Tomas VG, Wu CL, Murphy JD. The role of perioperative chewing gum on gastric fluid volume and gastric pH: a meta-analysis. J Clin Anesth. 2015 Mar;27(2):146-52. doi: 10.1016/j.jclinane.2014.07.005. Epub 2014 Nov 28.
• Background Bouvet L, Loubradou E, Desgranges FP, Chassard D. Effect of gum chewing on gastric volume and emptying: a prospective randomized crossover study. Br J Anaesth. 2017 Nov 1;119(5):928-933. doi: 10.1093/bja/aex270.
• Background Timmermann A, Bergner UA, Russo SG. Laryngeal mask airway indications: new frontiers for second-generation supraglottic airways. Curr Opin Anaesthesiol. 2015 Dec;28(6):717-26. doi: 10.1097/ACO.0000000000000262.

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