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STorz Against Glidescope Effectiveness (STAGE)

This study has been completed.
University of Iowa
The University of Texas Health Science Center, Houston
Information provided by (Responsible Party):
Michael Aziz, Oregon Health and Science University Identifier:
First received: June 14, 2012
Last updated: October 13, 2015
Last verified: October 2015
This study evaluates success rates of tracheal intubation (passing a breathing tube)for patients who may be more challenging to intubate while utilizing one of two devices that facilitate placement of the tube with video technology.

Condition Intervention
Difficult Airway
Device: C-MAC
Device: Glidescope

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Outcomes Assessor)
Primary Purpose: Supportive Care
Official Title: Comparative Effectiveness of the C-MAC D-blade to Glidescope Videolaryngoscope in the Predicted Difficult Airway

Resource links provided by NLM:

Further study details as provided by Oregon Health and Science University:

Primary Outcome Measures:
  • Intubation Success Rate [ Time Frame: 1 week ]
    Success rate is defined as a single blade insertion with successful tracheal tube placement confirmed by return of end-tidal carbon dioxide

Secondary Outcome Measures:
  • Intubation Time [ Time Frame: 1 week ]
    Intubation time is defined as the time from blade insertion to first return of end-tidal carbon dioxide

  • Laryngeal View [ Time Frame: 1 week ]
    Laryngeal view is defined by the modified Cormack and Lehane scale (1-4) and is assessed by the clinician and the study team.

  • Use of Adjuncts [ Time Frame: 1 week ]
    The need for use of a gum-elastic bougie or external laryngeal manipulation to facilitate tube placement will be measured by the study team.

  • Complications [ Time Frame: 1 week ]
    Patients will be examined for evidence of mucosal or dental injury upon intervention. Patients will be asked if they have a sore throat in the recovery room, and their medical record will be reviewed to determine if any other airway related complications were observed by the clinical team including the need for reintubation or steroid administration to reduce swelling.

Enrollment: 1100
Study Start Date: May 2013
Study Completion Date: August 2014
Primary Completion Date: June 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: C-MAC
Providers will utilize the C-MAC video laryngoscope equipped with a D-blade to facilitate intubation
Device: C-MAC
C-MAC arm
Active Comparator: Glidescope
Providers will utilize the Glidescope video laryngoscope equipped with the #4 blade to facilitate intubation
Device: Glidescope
Glidescope arm


Ages Eligible for Study:   18 Years to 100 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • adult 18 years of age
  • Mallampati classification scale score of 3 or 4
  • Neck circumference greater than 40cm for males, 38 cm for females
  • mouth opening less than 3cm, but greater than 2cm

Exclusion Criteria:

  • children
  • prisoners
  • history of easy intubation (success on first attempt with direct laryngoscopy)
  • known unstable cervical spine injury
  • emergency surgery
  • nasal intubation route
  • planned awake technique
  Contacts and Locations
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Please refer to this study by its identifier: NCT01632683

United States, Oregon
Oregon Health & Science University
Portland, Oregon, United States, 97239
Sponsors and Collaborators
Oregon Health and Science University
University of Iowa
The University of Texas Health Science Center, Houston
  More Information

Responsible Party: Michael Aziz, Associate Professor, Oregon Health and Science University Identifier: NCT01632683     History of Changes
Other Study ID Numbers: 62199040
Study First Received: June 14, 2012
Results First Received: September 30, 2014
Last Updated: October 13, 2015

Keywords provided by Oregon Health and Science University:
difficult airway
video laryngoscopy processed this record on April 26, 2017