Korean J Anesthesiol.  1999 Sep;37(3):398-401. 10.4097/kjae.1999.37.3.398.

A Comparison of the Effects of Different Types of Laryngoscope on Hemodynamics: McCoy Versus the Macintosh Blade

• Han TS
• Kim JA
• Park NG
• Lee SM
• Cho HS
• Chung IS

• KMID: 2240038
• DOI: http://doi.org/10.4097/kjae.1999.37.3.398

Abstract

BACKGROUND: This study was designed to compare the hemodynamic changes in response to direct laryngoscopy of the McCoy blade and the Macintosh blade.
METHODS
Sixty patients scheduled for elective gynecologic surgery were randomly allocated into two groups. The induction of anesthesia was done with thiopental sodium 5 mg/kg, fentanyl 2 mcg/kg, vecuronium 0.1 mg/kg. When the train of four arrived came at 0/4, the vocal cords were visualized with either the McCoy or the Macintosh laryngoscope blade for 10 seconds. Heart rate and blood pressure were recorded at 1 minute intervals for 5 minutes.
RESULTS
Laryngoscopy caused significant increases in arterial blood pressure in both groups, while it had no effect on heart rate in either group. There were no significant differences in blood pressure and heart rate responses to laryngoscopy in the blades.
CONCLUSIONS
The McCoy and the Macintosh blade show similar changes in heart rate and blood pressure after laryngoscopy.

Keyword

Anesthetic techniques, intubation; Equipment, laryngoscopes

MeSH Terms

Anesthesia
Arterial Pressure
Blood Pressure
Female
Fentanyl
Gynecologic Surgical Procedures
Heart Rate
Hemodynamics*
Humans
Laryngoscopes*
Laryngoscopy
Thiopental
Vecuronium Bromide
Vocal Cords
Fentanyl
Thiopental
Vecuronium Bromide