The Effect of Ketamine and Dexamethasone on Frequency and Intensity of Fentanyl-Induced Cough

Document Type : Original Article (s)

Authors

1 Associate Professor, Department of Anesthesiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran

2 Assistant Professor, Department of Anesthesiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran

3 Student of Medicine, Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran

Abstract

Background: Intravenous (IV) administration of fentanyl during induction of general anesthesia often elicits cough, with frequency of 18% to 80%. Therefore, in this study, we aimed to compare the effects of ketamine and dexamethasone on decreasing cough in patients undergoing general anesthesia with fentanyl.Methods: During a double-blind randomized clinical trial study, 99 patients aged 18-64 years with class I and II based on the scale of American Society of Anesthesiologists (ASA) who were undergoing general anesthesia with fentanyl were investigated. Patients were randomly divided equally into 3 groups receiving ketamine (0.5 mg/kg), dexamethasone (0.1 mg/kg), and placebo (5 ml normal saline). All drugs were administered 1 minute before administration of 2.5 µg/kg fentanyl. Vital signs, and frequency and intensity of cough were measured and recorded. Statistical analysis was performed using one-way ANOVA and Kruskal-Wallis tests.Findings: The frequency of cough was significantly lower in the ketamine group (81.8%) compared with dexamethasone (90.9%) and placebo (93.1%) groups (P = 0.03). The intensity of cough was significantly lower in the ketamine group (mild: 18.2%; moderate: 78.8%; severe: 3.0%) compared with placebo group (mild: 9.1%, moderate: 72.7%; severe: 18.2%) (P = 0.04). Furthermore, there were significant differences between the three groups in variations of systolic blood pressure, diastolic blood pressure, and heart rate (P < 0.05 for all).Conclusion: Administration of low-dose ketamine can effectively reduce frequency and intensity of fentanyl-induced cough during anesthesia in patients undergoing general anesthesia.

Keywords

References

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Journal of Isfahan Medical School
Volume 36, Issue 468 - Serial Number 468
January and February 2018
Pages 104-110

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History

  • Receive Date: 12 September 2017
  • Revise Date: 01 November 2024
  • Accept Date: 06 April 2022

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