Effect of Lidocaine Sprayed on Hemodynamics During Endotracheal Intubation

Effect of Lidocaine Sprayed on Direct Laryngoscopy and Trachea on Hemodynamics During Endotracheal Intubation

A previous study demonstrated topical lidocaine spray on the larynx and the trachea is effective in reducing hemodynamic response to laryngoscopy and endotracheal intubation. In clinical practice, blind oropharyngeal application of lidocaine without aiding direct laryngoscopy can not assured that sprayed lidocaine effectively reaches the larynx and trachea. Therefore, direct laryngoscopy should be necessary to reach topical lidocaine to correct sites. Unfortunately, direct laryngoscopy itself can affect hemodynamics during spraying lidocaine. In this study, we will investigate an effect of lidocaine sprayed on direct laryngoscopy and the tracheal mucosa on hemodynamic change throughout intubation.

Inclusion Criteria:

• aged 20-60 years,
• ASA groups I or II

Exclusion Criteria:

• ASA III or IV,
• hypertension,
• anticipated difficult airway, and
• severe coronary and cerebrovascular diseases