NCT02387502

Comparison of Three Laryngoscopes in Difficult Laryngoscopy

Comparative Evaluation of Macintosh, MacCoy and Airtraq Laryngoscope in Simulated Difficult Laryngoscopy Using Rigid Neck Collar

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 120 (actual)
• Sponsor: Government Medical College, Haldwani · Academic / Other
• Sex: All
• Age: 18 Years – 60 Years
• Healthy volunteers: Not accepted

Summary

Tracheal intubation requires alignment of oro-pharyngeal-laryngeal axes. When these three axes are not aligned, intubation becomes difficult. In the researchers' study, the investigators simulated difficult laryngoscopy situation by using a rigid neck collar. This neck collar renders intubation difficult not only by restricting neck movement, but also reducing mouth opening. The investigators compared the performance of Macintosh, MacCoy and Airtraq laryngoscope in simulated difficult laryngoscopy using a rigid neck collar.

Detailed description

Airtraq laryngoscope is an optical laryngoscope which allows visualization of vocal cord as a reflected image through multiple lenses and prisms. MacCoy laryngoscope is a modification of Macintosh laryngoscope. It has a lever which, when pressed, moves its flexible tip. In the investigators' study, the researchers compared the performances of Airtraq laryngoscope with MacCoy and Macintosh laryngoscopes in simulated difficult laryngoscopy using a rigid neck collar. The researchers recruited 120 patients and randomly divided those patients into three equal groups i.e. 30 patients in each group. These three groups are 1-Airtraq, 2-MacCoy and 3-Macintosh. The researchers compared efficacy and safety in these three laryngoscopes. The researchers compared efficacy in terms of time of intubation, ease of intubation, overall success, Intubation difficulty score, visualization of vocal cord in terms of POGO (percentage of Glottic Opening) score. The researchers compared safety in terms of hemodynamic pressor response and airway trauma.

Conditions

• Intubation; Difficult

Interventions

Type	Name	Description
DEVICE	Intubation- Macintosh laryngoscope	Difficult intubation was simulated by using rigid neck collar. Then patients were intubated according to the assigned laryngoscopes. In Macintosh group, tip of the laryngoscope blade was placed in the vallecula and epiglottis was lifted. After visualization of the vocal cord, patients were intubated.
DEVICE	Intubation- MacCoy laryngoscope	In MacCoy group, tip of the laryngoscope blade was placed in the vallecula and lever was pressed to flex the tip. After visualization of the vocal cord, patients were intubated.
DEVICE	Intubation- Airtraq laryngoscope	In Airtraq group, the laryngoscope was loaded with endotracheal tube. Airtraq laryngoscope was inserted through midline and after visualization of image of vocal cord through its eyepiece, endotracheal tube was passed.

Timeline

• Start date: 2014-01-01
• Primary completion: 2014-12-01
• Completion: 2014-12-01
• First posted: 2015-03-13
• Last updated: 2015-05-04
• Results posted: 2015-05-04