Measuring 'vocal cord-carina length' for left-sided double lumen tube insertio

Not Applicable

Conditions: Not Applicable

Registration Number: KCT0006481

Lead Sponsor: Hanyang University Seoul Hospital

Brief Summary: Not available

Detailed Description: Not available

Recruitment & Eligibility

Status: ot yet recruiting

Sex: All

Target Recruitment: 74

Inclusion Criteria

Patients undergoing surgeries requiring left-sided double lumen endotracheal tube insertion under general anesthesia
- American Society of Anesthesiologist (ASA) physical status classification I, II, III
- Patients aged 19 years or older

Exclusion Criteria

- When right-sided double lumen tube insertion is needed
- Anatomical abnormalities in the airways such as glottis, trachea, and bronchi (congenital, tumor, etc.)
- Patients who underwent general anesthesia within the prior month
- body mass index over 35 kg/m2
- Mallampati classification IV in airway assessment
- If difficult intubation is anticipated (history of difficult intubation, etc.) in airway assessment
- Pulmonary tuberculosis, severe chronic obstructive pulmonary disease, systemic infection

Study & Design

Study Type: Interventional Study

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Whether the left-sided double lumen tube is in the optimal position (the bronchial cuff is 5-10 mm below the carina)

Secondary Outcome Measures

Name	Time	Method
The depth of tube insertion after left-sided double lumen tube intubation;The depth of the tube insertion at the optimal position;Intubation time: from the time the video laryngoscope enters the mouth until end-tidal CO2 appears on the ventilator;Confirmation time of optimal positioning of the tube using bronchoscope: from the time the bronchoscope enters the tube until the tube insertion depth is confirmed;Whether there is trachea or bronchial injury: erosion, petechiae, hemorrhage, etc.;Failure of intubation: if the endobronchial lumen cannot enter the left main bronchus after 3 attempts;Whether the tube is optimally positioned after surgical positioning;Sore throat or hoarseness