Different Stylet Angles for Orotracheal Intubation Using Glidescope® Video Laryngoscope in Children

Study Overview
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Brief Summary
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The purpose of this study is to evaluate the feasibility of endotracheal intubation via glidescope videolaryngoscope (GVL) using different curve of stylet in 120 children aged between 1 and 5 year old.

Detailed Description
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Pediatric patients aged 1-5 year old are randomly assigned to one of two groups; standard curve (S) and tip-manipulated curve (T) groups. After routine anesthetic induction, endotracheal intubation is performed with GVL. Size of GVL blade is selected according to weight; GVL 0: <1.5kg, GVL 1:1.5-3.6kg, GVL 2: 1.8-10kg, GVL 2.5: 10-28kg). Before intubation, stylet curve is differently manipulated according to group. The style is curved in accordance with the curve of GVL blade in S group, whereas the distal tip of style is additionally bended to the left (15-20 degree) in T group. Time from visualization of glottis with GVL to approaching of endotracheal tube to glottis, and time to completion of intubation are measured. In addition, the easiness of intubation is assessed using Visual Analogue Scale (0: extremely easy, 10: extremely difficult) and will be compared in both groups.

Official Title
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Clinical Comparison of Different Stylet Angles for Orotracheal Intubation Using Glidescope® Video Laryngoscope in Children

Conditions
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Intubation

Intervention / Treatment
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* Device: Glidescope® with tip manipulated stylet
* Device: Glidescope® with standard-curved tip


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: children aged between 1 and 5 years who are scheduled for elective surgery American Society of Anesthesiologist physical status I, II Exclusion Criteria: History of asthma Active upper respiratory infection Significant cardiopulmonary disease

Ages Eligible for Study
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Minimum Age: 1 Year
Maximum Age: 5 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

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


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: standard curve group<br>The style is curved in accordance with the curve of GVL blade in this group. | Device: Glidescope® with standard-curved tip<br>* The style is curved in accordance with the curve of GVL blade<br>|
| Experimental: tip-manipulated curve group<br>The style is curved in accordance with the curve of GVL blade and the distal tip of style is additionally bended to the left (15-20 degree) in this group. | Device: Glidescope® with tip manipulated stylet<br>* The intubating style is curved in accordance with the curve of GVL blade and the distal tip of style is additionally bended to the left (15-20 degree)<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Time to tracheal intubation | From the insertion of GVL to completion of endotracheal intubation | up to 3 min after insertion of GVL | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Time to approaching of endotracheal tube tip to glottis | From the insertion of GVL to approaching of endotracheal tube tip to glottis | up to 3 min after insertion of GVL | 
| Number of attempt for glottis passage of endotracheal tube |  | up to 3 min after insertion of GVL | 
| The change in stylet angle | The number of additional manipulation of stylet for success of endotracheal intubation | up to 3 min after insertion of GVL | 
| Visual analogue scale for the easiness of endotracheal intubation | Measurement of the easiness of endotracheal intubation | up to 3 min after insertion of GVL | 
| Successful endotracheal intubation in 30 seconds | Success or failure in completion of endotracheal intubation in 30 seconds | up to 3 min after insertion of GVL |