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Comparison of hemodynamic response to tracheal intubation with Macintosh and McCoy laryngoscopes.

Haidry MA, Khan FA - J Anaesthesiol Clin Pharmacol (2013)

Bottom Line: This difference between groups was significant (P < 0.0001).No arrhythmias or ST changes were observed in either group.Hemodynamic changes with use of McCoy laryngoscope were lesser in magnitude and of shorter duration.

View Article: PubMed Central - PubMed

Affiliation: Department of Anesthesia, Aga Khan University, Karachi, Pakistan.

ABSTRACT

Background: Use of McCoy blade laryngoscope avoids the lifting force in the vallecula and theoretically should lead to a lower hemodynamic response related to laryngoscopy and tracheal intubation. The available literature on the topic is conflicting.

Materials and methods: We studied the hemodynamic response to laryngoscopy and tracheal intubation in 60 ASA 1 AND 2 adult patients using either Macintosh or McCoy laryngoscopes. The change in systolic, diastolic, mean arterial pressure, and heart rate (HR) was observed for 10 min post intubation. Arrhythmias and ST changes were also observed.

Results: The maximum change in HR was 18.7% in the Macintosh and 7.7% in the McCoy group, and in systolic arterial pressure was 22.9% in the Macintosh and 10.3% in the McCoy group. This difference between groups was significant (P < 0.0001). The change lasted for a lesser duration in the McCoy group. No arrhythmias or ST changes were observed in either group.

Conclusion: Hemodynamic changes with use of McCoy laryngoscope were lesser in magnitude and of shorter duration.

No MeSH data available.


Comparison of mean heart rate between Macintosh blade (●…●) and McCoy blade (▲____▲). *Indicates significant difference from baseline; †indicates significant difference between groups
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Figure 1: Comparison of mean heart rate between Macintosh blade (●…●) and McCoy blade (▲____▲). *Indicates significant difference from baseline; †indicates significant difference between groups

Mentions: HR rose significantly for 3 min following laryngoscopy in the Macintosh group and for 2 min in the McCoy group. A significant drop was seen at 10 min following laryngoscopy in the Macintosh group only. On intergroup comparison, McCoy group showed statistically significant lower values immediately after and at 1, 2, 3, 4, and 5 min following laryngoscopy. The maximum rise in the HR compared to baseline seen was 18.7% in the Macintosh group compared to 7.7% in the McCoy group (P = 0.0001). These changes are shown in [Figure 1].


Comparison of hemodynamic response to tracheal intubation with Macintosh and McCoy laryngoscopes.

Haidry MA, Khan FA - J Anaesthesiol Clin Pharmacol (2013)

Comparison of mean heart rate between Macintosh blade (●…●) and McCoy blade (▲____▲). *Indicates significant difference from baseline; †indicates significant difference between groups
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3713667&req=5

Figure 1: Comparison of mean heart rate between Macintosh blade (●…●) and McCoy blade (▲____▲). *Indicates significant difference from baseline; †indicates significant difference between groups
Mentions: HR rose significantly for 3 min following laryngoscopy in the Macintosh group and for 2 min in the McCoy group. A significant drop was seen at 10 min following laryngoscopy in the Macintosh group only. On intergroup comparison, McCoy group showed statistically significant lower values immediately after and at 1, 2, 3, 4, and 5 min following laryngoscopy. The maximum rise in the HR compared to baseline seen was 18.7% in the Macintosh group compared to 7.7% in the McCoy group (P = 0.0001). These changes are shown in [Figure 1].

Bottom Line: This difference between groups was significant (P < 0.0001).No arrhythmias or ST changes were observed in either group.Hemodynamic changes with use of McCoy laryngoscope were lesser in magnitude and of shorter duration.

View Article: PubMed Central - PubMed

Affiliation: Department of Anesthesia, Aga Khan University, Karachi, Pakistan.

ABSTRACT

Background: Use of McCoy blade laryngoscope avoids the lifting force in the vallecula and theoretically should lead to a lower hemodynamic response related to laryngoscopy and tracheal intubation. The available literature on the topic is conflicting.

Materials and methods: We studied the hemodynamic response to laryngoscopy and tracheal intubation in 60 ASA 1 AND 2 adult patients using either Macintosh or McCoy laryngoscopes. The change in systolic, diastolic, mean arterial pressure, and heart rate (HR) was observed for 10 min post intubation. Arrhythmias and ST changes were also observed.

Results: The maximum change in HR was 18.7% in the Macintosh and 7.7% in the McCoy group, and in systolic arterial pressure was 22.9% in the Macintosh and 10.3% in the McCoy group. This difference between groups was significant (P < 0.0001). The change lasted for a lesser duration in the McCoy group. No arrhythmias or ST changes were observed in either group.

Conclusion: Hemodynamic changes with use of McCoy laryngoscope were lesser in magnitude and of shorter duration.

No MeSH data available.