Comparison of Intubation Conditions of the Articulating Stylet and Intubating Stylet Guided Videolaryngoscopy

Study Overview
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Brief Summary
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Indirect videolaryngoscopes provide an improved view of the glottis. Unfortunately enhanced video blade angulation leads to difficulty in passage of the endotracheal tube (ETT) towards the larynx around the steep blade angulation despite adequate visualization of the glottis. Pre-shaping the ETT with the rigit malleable stylet is recommended. The investigators hypothesized that using articulating stylet (AS) would enhance first attempt intubation, shorten the intubation time, reduce the possibility of the soft tissue trauma compared to conventional intubation stylet (IS) in patients with difficult airway .

Detailed Description
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Patients with known airway difficulty (anticipated difficult airway (ADA) score >6) will be included to the study. All patients will receive general anesthesia for a variety of elective surgical procedure. Tracheal intubation will be performed by senior anesthesiologist. Patients will be intubated using AS-videolaryngoscope (n= 24) or IS-videolaryngoscope (n=24) randomly. Patients demographic details (age 18-65 yr, body mass index, ASA phisical status), ADA scores, Cormack-Lehane scores, intubation difficulty scores, intubation attempts, intubation time, hemodynamic variables, sore throat, anesthesiologists satisfaction will be recorded.

Official Title
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Comparison of Intubation Conditions of the Articulating Stylet and Intubating Stylet Guided Videolaryngoscopy in Patients With Difficult Airway

Conditions
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Difficult Intubation

Intervention / Treatment
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* Device: articulating stylet
* Device: conventional stylet


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: ASA 1-2 physical status (Anticipated difficult airway) ADA scores >6 Elective surgery Exclusion Criteria: ASA 3-4 physical status Immobilizedcervical spine

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 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: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Group A<br>articulating stylet | Device: articulating stylet<br>* patient who intubated with articulating stylet<br>|
| Active Comparator: group C<br>conventional stylet | Device: conventional stylet<br>* patient who intubated with conventional stylet<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| intibation time | Total intubation time (second) | Through intubation completion, an avarage of 5 minutes | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| tracheal intubation attempts | number of intubation attempts | Through intubation completion, an avarage of 5 minutes | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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videolaryngoscope, intubation stylet, articulating stylet, difficult airway