Journal of Isfahan Medical School

Journal of Isfahan Medical School

The Effect of Using Topical Lidocaine on Blade and Cuff of Laryngoscope, and Tracheal Mucosa on Changes of Heart Rate and Blood Pressure during Laryngoscopy and Intubation

Document Type : Original Article (s)

Authors
Azim Honarmand 1
Mohamadreza Safavi 1
Minoo Hashemzadeh 2
1 Professor, Anesthesiology and Critical Care Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
2 Student of Medicine, Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract
Background: Laryngoscopy is a common procedure in general anesthesia; but some problems such as laryngospasm and tachycardia may occur during laryngoscopy. This study aimed to determine the effect of using topical lidocaine on blade and cuff of laryngoscope tube, and tracheal mucosa on changes of heart rate and blood pressure during laryngoscopy and intubation.Methods: In a clinical trial study, 275 patients, candidates for laryngoscopy, were selected and randomly divided in 5 groups of 55. 4 groups received lidocaine spray 10% on laryngoscope blade, intratracheal, on the cuff of laryngoscope tube, on blade plus cuff and plus intratracheal, respectively, and the fifth group did not receive lidocaine. Heart rate and blood pressure were measured in base, before laryngoscopy, and 1, 3, 5, and 10 minutes after laryngoscopy and compared between the five groups.Findings: Spraying lidocaine on endotracheal cuff and laryngoscope blade led to decrease of complications such as tachycardia, bradycardia, hypotension, and hypertension. So, heart rate and blood pressure were the highest in the control group and mean changes of heart rate and blood pressure were significantly different between the five groups (P < 0.05); but mean changes of oxygen saturation was not statistically deferent between the 5 groups.Conclusion: Spraying lidocaine 10% of the blade and cuff of laryngoscope, and intratracheal led to decrease of heart rate and blood pressure and probably, these methods can be used for decrease of complications due to laryngoscopy.
Keywords
Laryngoscopy
Lidocaine
Intratracheal intubation
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Journal of Isfahan Medical School
Volume 35, Issue 446 - Serial Number 446
July and August 2017
Pages 1203-1209

  • Receive Date 11 July 2017
  • Accept Date 06 April 2022