Applicaion of Mouth Opener Combined With Electronic Video Laryngoscope in Double-lumen Intubation of Patients With Difficult Airway

Study Overview
=================
Brief Summary
-----------------
How to quickly expose glottis and accurately insert double luminal tracheal tube in patients with difficult airway in thoracoscopic surgery has become an urgent problem in anesthesia induction.This study through the double cavity bronchial tube visual laryngoscope intubation with open mouth and electronic video laryngoscope used in combination, to explore whether can shorten the glottis exposure, improve the success rate of the double lumen tube intubation will reduce pharyngeal damage, reduce intubation hemodynamic fluctuations, in order to improve the glottis appeared difficult patients with bronchial intubation success rate to provide the reference.

Detailed Description
-----------------
A total of 60 patients who needed double-lumen endobronchial catheterization in thoracic department and whose Arne o 'risk index score was at least 7 points were randomly divided into three groups.Group B was intubated with video laryngoscopy.Group C was intubated with a mouth opener for video laryngoscope combined with a double-lumen bronchial tube for video laryngoscope intubation (hereinafter referred to as the mouth opener).The glottis exposure time, bronchial intubation time, intubation times, success rate of one intubation, and NRS score of pharyngeal pain 8 hours after surgery were observed and recorded in the three groups, and the hemodynamic changes after intubation were observed and recorded.

Official Title
-----------------
Applicaion of Mouth Opener Combined With Electronic Video Laryngoscope in Double-lumen Intubation of Patients With Difficult Airway

Conditions
-----------------
Difficult Airway Intubation, Double-lumen Tube

Intervention / Treatment
-----------------
* Device: laryngoscope with mouth opener
* Device: video laryngoscope with mouth opener


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Diagnosis of early lung cancer Ages ranged from 30 to 80 Exclusion Criteria: Pregnancy Prediction of difficulty in mask ventilation Chest X-ray examination of trachea, bronchial anatomical abnormalities or tumor compression caused by trachea/bronchial deformation Failure of assessing Arne risk index

Ages Eligible for Study
-----------------
Minimum Age: 30 Years
Maximum Age: 80 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: an ordinary laryngos with mouth opener<br> | Device: laryngoscope with mouth opener<br>* Double-lumen tube combined with mouth gag for laryngoscope intubation<br>|
| No Intervention: Video laryngoscopy intubation<br> | |
| Experimental: Video laryngoscope with mouth opener<br> | Device: video laryngoscope with mouth opener<br>* Double-lumen tube combined with mouth gag for video laryngoscope intubation<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Glottis exposure time |  | through study completion, an average of 1 minute | 
| Bronchial intubation time |  | through study completion,an average of 1 minute | 
| The number of intubation |  | through study completion,an average of 1 minute | 
| One-time success rate of intubation |  | through study completion,an average of 1 minute | 
| Glottic field grading | Cormack-Lehane grading, C-L1：Can see glottis mostly；C-L2：Only the posterior union of the glottis is visible, not the glottis, and at most the cartilago arytaenoidea is visible when the larynx is lightly pressed；C-L3： can't see any part of the glottis, only the epiglottis； C-L4：No part of the larynx can be seen | through study completion,an average of 1 minute | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
video laryngoscop, double-lumen tube, mouth gag