Effect of tracheal tube cuff inflation with alkalinized lidocaine versus air on hemodynamic responses during extubation and post-operative airway morbidities in children: prospective observational cohort study, Ethiopia

Prevalence and factors associated with postoperative sore throat in Ethiopia: A systemic review and meta-analysis, 2023

Background

Postoperative sore throat (POST) remains a stressful impact of postoperative airway management, and it contributes to mortality and morbidity after general anesthesia. Its pooled prevalence and determinants in Ethiopia have not been fully studied. This study intended to assess the pooled prevalence and risk variables for POST in Ethiopia.

Methods

A systematic review and Meta-analysis were performed as per the recommendation of PRISMA. To evaluate the pooled prevalence and factors significantly associated with POST in Ethiopia, electronic databases were searched till November 30/2023 and publications were chosen based on inclusion criteria. To assess the quality of the included studies, the Joanna Briggs Institute criteria was used. STATAMP 17 software was used for all data analysis.

Results

Databases were searched for possible research using Medical Subject headings or entries or key phrases. Only 12 articles were included in the final analysis after screening by titles, abstracts, and full text based on the qualifying criteria. The pooled prevalence of POST in Ethiopia is 47.3 %. The determinants of POST in Ethiopia were female sex, repeated attempts at intubation, blood visible on the tip of an endotracheal tube or laryngoscope, prolonged duration of intubation, and using endotracheal intubation over laryngeal mask airway.

Conclusion

In Ethiopia, the overall prevalence of postoperative sore throat is substantial. Prolonged intubation for more than 2 h, using ETT over LMA, Sex being female multiple attempts at intubation, and blood seen on the tip of ETT or Laryngoscope were the determinant factors of POST in Ethiopia.

Efficacy of endotracheal tube cuff lignocaine in the prevention of postextubation cough in children undergoing elective surgeries - A randomised controlled trial

Background and Aims

Postextubation airway complications are more common in paediatric patients than in adults. Intravenous lignocaine effectively prevents extubation response; however, data on using intracuff lignocaine in microcuff endotracheal tubes is scarce. The primary aim of this study was to compare the incidence of postextubation cough between intracuff lignocaine and intracuff air in the paediatric population during tracheal extubation.

Methods

This randomised controlled study was conducted in 120 paediatric patients aged 1 month to 12 years who were scheduled to undergo surgeries under general anaesthesia. They were randomised to Group C (intracuff air) and Group L (intracuff 2% lignocaine). After administering general anaesthesia, the airway was secured with an age-appropriate microcuff endotracheal tube. According to groups, the cuff was inflated with air or lignocaine to achieve a cuff pressure of 10 cm H2O. Incidences of cough, desaturation, laryngospasm, apnoea and haemodynamic changes were recorded after tracheal extubation. Categorical variables were compared using the Chi-square or Fisher's exact test, and continuous variables were compared using the Student's t-test or Mann-Whitney U test. Intergroup differences between the variables were analysed by a two-way repeated measure analysis of variance.

Results

The incidence of postextubation cough was significantly higher in Group C [17 (28.3%) (confidence interval {CI} = 17.4-41.4)] when compared to Group L [8 (13.3%) (CI = 5.9-24.6)], with P = 0.043. One patient in Group C had laryngospasm compared to none in Group L. In Group C, there was also a significant increase in heart rate at all time points (1-5 min after extubation) from the baseline, and this increase was also significantly higher when compared to Group L (P < 0.05).

Conclusion

The incidence of postextubation cough was significantly lower with intracuff lignocaine compared to that with intracuff air in paediatric patients.

A randomised, double-blind, comparative study of preoperative magnesium sulphate versus zinc sulphate gargle for prevention of postoperative sore throat following endotracheal intubation

Background and Aims

Magnesium sulphate and zinc sulphate have been reported to attenuate postoperative sore throat (POST). The study aims to compare the effect of preoperative magnesium sulphate and zinc sulphate gargle on the incidence and severity of POST following endotracheal intubation within 24 h.

Methods

After ethics committee approval, 132 patients were randomly allocated to three groups (M, Z and D). Fifteen minutes before laryngoscopy and tracheal intubation, patients assigned to groups M and Z received a solution for gargle containing magnesium sulphate 20 mg/kg and zinc sulphate containing 40 mg of elemental zinc dissolved in 20 ml of 5% dextrose solution, respectively. Group D received 20 ml of 5% dextrose solution. Incidence and severity of POST (4-point score: Grade 0- no sore throat, Grade 1- mild sore throat, Grade 2- moderate sore throat, Grade 3- severe sore throat) was assessed for 24 h after extubation. Statistica, Version 8.0 (StatSoft, Inc., Tulsa, Oklahoma, USA) was used for analysing the data.

Results

The lowest incidence of POST in group M was 13.6% (95% confidence interval [CI] 3.5-23.7) compared to 0% in group Z, whereas the highest incidence recorded in group M was 25% (95% CI 12.2-37.7) in contrast to 13.6% (95% CI 3.5-23.7) in group Z during the first 24 h after operation. It was observed that the incidence of mild POST (POST score 1) was significantly lower (P < 0.05) in group Z compared to group M in the first 4 h postoperatively.

Conclusion

Zinc sulphate gargle before laryngoscopy and tracheal intubation is more effective for reducing the incidence of POST than magnesium sulphate gargle.

Postoperative airway morbidities in pediatric patients

Pediatric airway management is a huge challenge for anaesthetists, and airway-related complications should be actively addressed and focused on.