CMAC® Versus Airtraq® and Macintosh Laryngoscope in Difficult Tracheal Intubation.

Not Applicable

Terminated

• Conditions: Airway; Difficult Intubation; Airway Device
• Interventions: Device: macintosh laryngoscope; Device: C-MAC laryngoscope; Device: Airtraq device

• Registration Number: NCT01031940
• Lead Sponsor: University College Hospital Galway

Brief Summary

It is essential that anaesthetists successfully perform orotracheal intubation in scenarios in which intubation is potentially more difficult, such as where anatomical characteristics predictive of difficult intubation are present.

The CMAC® Laryngoscope is a new intubating device. It is designed to provide a view of the glottis without alignment of the oral, pharyngeal and tracheal axes.

The CMAC may be especially effective in situations where intubation of the trachea is potentially difficult.

The efficacy of this device in comparison to the traditional Macintosh laryngoscope and other novel laryngoscopes is not known.

We aim to compare its performance to that of the Macintosh laryngoscope, the gold standard device, in patients with one or more anatomical characteristics predictive of difficult intubation.

The investigators further aim to compare it to the Airtraq® device a device which has been shown to be superior to the Macintosh laryngoscope in previous trials.

The investigators primary hypothesis is that, in the hands of experienced anaesthetists, time to intubation would be shorter using the CMAC than using the Macintosh laryngoscope in patients with two or more anatomical characteristics predictive of difficult intubation.

The investigators further hypothesize that the Airtraq® will be superior the CMAC® with one or more anatomical characteristics predictive of difficult intubation.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2009-12-14
• Study First Submitted QC: 2009-12-14
• Study First Posted: 2009-12-15
• Study Start: 2010-01
• Primary Completion: 2011-03
• Study Completion: 2011-03
• Status Verified: 2012-06
• Last Update Submitted: 2012-06-17
• Last Update Posted: 2012-06-19

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 15

Inclusion Criteria

• ASA 1-3 patients undergoing surgical procedures requiring orotracheal intubation.

• Written informed Consent

• No relevant drug allergies

• Patients with 2 or more of the following predictors of difficult intubation:

  • Mallampatti II - IV
  • Thyromental distance < 6cm
  • Mouth opening < 3.5 cm
  • Cervical spine disease
  • Anteriorly protruding incisors
  • Presence of Caps or Crowns

Exclusion Criteria

• Patients with history of or risk factors for gastric regurgitation
• Patients unable to consent for the trial

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
macintosh	macintosh laryngoscope	-
C-MAC	C-MAC laryngoscope	-
Airtraq	Airtraq device	-

Primary Outcome Measures

Name	Time	Method
Rate of successful placement of Tube in the Trachea	immediately

Secondary Outcome Measures

Name	Time	Method
1. Duration of Intubation attempt (successful Attempts only) a. Absolute time taken to perform successful tracheal intubation b. Number of successful intubations completed within 30 seconds	immediately
2. Tracheal Intubation attempts. a. Overall number of attempts at Intubation. b. Number of successful intubations on first attempt	immediately
3. Laryngeal View Obtained c. Cormac and Lehane Grading of Best Laryngeal View d. Change in view compared to initial assessment by independent anaesthetist. e. POGO score.	immediately

Trial Locations

Locations (1)

Galway University Hospital; 🇮🇪 Galway, Ireland