GlideScope® vs GlideScope® + aScope® for Managing Difficult Airways.

Study Overview
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Brief Summary
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The use in a combined way of two systems of intubation (Glidescope + aScope) would condition an increase in the success rate of endotracheal intubation maneuver compared to conventional isolated Glidescope use in patients with clinical criteria of difficult airway.

Detailed Description
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Worldwide, up to 600 patients are estimated to die annually as a result of the complications that occur during tracheal intubation The GlideScope® (videolaryngoscope) is used for endotracheal intubation in patients with difficult airway predictors, in this patients overall success intubation rate is 96%. but success intubation rate at first attempt is only 86%. Despite this positive rates, due to high comorbidity when intubation fails, both failure rates (inverse of success rate) are impermissible. 14% failure at the first attempt intubation as well as 4% overall intubation failure. in this study the investigators try to show that new procedure associating aScope® (disposable fiberscope) together with GlideScope® increases the success intubation rate of both ( overall and first attempt).

Official Title
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GlideScope® vs GlideScope® + aScope® for Managing Difficult Airways. Assessment of a New Procedure for Endotracheal Intubation in Patients With Suspected Difficult Airways

Conditions
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Airway Morbidity, Anesthesia Intubation Complication

Intervention / Treatment
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* Device: aScope®
* Device: Glidescope®


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients programed for general anesthesia with endotracheal intubation required that presents one or both criteria of difficult airway predictors: criteria 1: Arne test >10 (Arne J,1998) criteria 2: Ratio between neck circumference and thyromental distance > 4. (Kim WH, 2011) Exclusion Criteria: Patients with mouth opening which does not allow the introduction of video laryngoscope. Patients with indication of flexible fiberoptic intubation with awake patient.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Glide group<br>Device: Glidescope® use | Device: Glidescope®<br>* use of Glidescope® in conventional manner to facilitate endotracheal intubation<br>|
| Experimental: Glide+aScope group<br>Device: combined use of two airway devices Glidescope® + aScope® | Device: aScope®<br>* we use the aScope® as a flexible and dirigible guide to facilitate the passage of the endotracheal tube through the vocal cords.<br>Device: Glidescope®<br>* use of Glidescope® in conventional manner to facilitate endotracheal intubation<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| first attempt intubation success rate | first attempt intubation success rate | through study completion, an average of 1 year. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| overall intubation success rate | through study completion, an average of 1 year. | through study completion, an average of 1 year. | 
| intubation time (in seconds) | during anesthetic induction time until inflate pneumo tamponade after tracheal intubation | through study completion, an average of 1 year | 
| complications related to intubation | questionnaire | 30 days postoperative | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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videolaryngoscopy, difficult airway management