Video-stylet for Nasotracheal Intubation

Study Overview
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Brief Summary
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The purpose of this study is to compare conventional laryngoscopy with video-stylet (Trachway) for nasotracheal intubation in patients undergoing oro-maxillo-facial surgery.

Official Title
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Comparison of Conventional Laryngoscopy and Video-stylet to Assist Nasotracheal Intubation for Patients Undergoing Oro-Maxillo-facial Surgery

Conditions
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Intubation, Difficult

Intervention / Treatment
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* Device: conventional laryngoscopy
* Device: video-stylet


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients with American Society of Anesthesiologists physical status I-III aged 20-65 years Requiring Nasotracheal Intubation under general anesthesia unlimited mouth open unlimited neck motion Exclusion Criteria: mouth open < 3 cm Ankylosing arthritis patients. BMI≧35 kg/m2

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 65 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: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: conventional laryngoscopy<br>experimental conventional laryngoscopy group: laryngoscope is used to assist for nasotracheal intubation. | Device: conventional laryngoscopy<br>* the device is to assist nasotracheal intubation<br>* Other names: Macintoish laryngoscope;|
| Experimental: video-stylet<br>experimental video-stylet group:video-stylet is used to guide nasotracheal tube into trachea | Device: video-stylet<br>* the device is to guide the nasotracheal tube into trachea<br>* Other names: The Clarus Video System;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| number of the patients with successful nasotracheal intubation and scoring difficult intubation scale | Nasotracheal intubation assisted by a video-stylet may be performed in patients undergoing oro-maxillo-facial surgery following induction of anesthesia (fentanyl 2 micro-gram/kg, thiamylal 5 mg/kg, cis-atracurium 0.2 mg/kg and propofol 1 mg/kg) | half an hour | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| time to intubate | time of Intubating the nasotracheal tube (NT) from selected nostril to trachea is continuously calculated but separately into two parts. part one: from termination of mask ventilation and mask removed from face, to the NT tip on the nasopharynx. part two: advancing NT from nasopharynx, through vocal cord into trachea, to present of 3 end tidal carbon dioxide waveforms. | 10 minutes | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Conventional Laryngoscopy ,, Video-stylet ,, Nasotracheal Intubation