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

University College Hospital Galway

Status: Terminated

Conditions: Difficult Intubation; Airway; Airway Device

Treatments: Device: Airtraq device; Device: macintosh laryngoscope; Device: C-MAC laryngoscope

Study type: Interventional

Funder types: Other

Identifiers

NCT01031940

CMAC-1

Details and patient eligibility

About

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.

Enrollment: 15 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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15 participants in 3 patient groups

macintosh

Active Comparator group

Treatment:

Device: macintosh laryngoscope

C-MAC

Active Comparator group

Treatment:

Device: C-MAC laryngoscope

Airtraq

Active Comparator group

Treatment:

Device: Airtraq device