Optimal Insertion Depth of FOB for Oral FOB Intubation

• Conditions: General Anesthesia

• Registration Number: NCT05277064
• Lead Sponsor: Seoul National University Hospital

Brief Summary

For oral fiberoptic intubation, the preliminary insertion depth of the fiberoptic bronchoscope should be important because the excessive insertion depth or too shallow depth might be the reason why the clinicians cannot perform oral fiberoptic intubation completely.

The purpose of the study is to find out the optimal preliminary insertion depth of the fiberoptic bronchoscope for visualization of glottic opening in oral fiberoptic intubation.

Detailed Description

For oral fiberoptic intubation, the preliminary insertion depth of the fiberoptic bronchoscope should be important because the excessive insertion depth or too shallow depth might be the reason why the clinicians cannot perform oral fiberoptic intubation completely.

The purpose of the study is to find out the optimal preliminary insertion depth of the fiberoptic bronchoscope for visualization of glottic opening in oral fiberoptic intubation.

The investigators will enroll the subjects of the present study after obtaining the written consent.

After enrollment, the investigators will measure some anatomical distance, such as patient height.

After induction of anesthesia and muscle relaxation for tracheal intubation, An investigator who has experiences of numerous fiberoptic intubation will measure the optimal preliminary insertion depth of the fiberoptic bronchoscope from the philtrum, the upper lip, or the incisors for oral fiberoptic intubation, with the aid of assistants. Then, tracheal intubation with a laryngoscope as a routine manner of our institute.

The investigators will calculate the mean value of the optimal depth and find out an formula for that from our data.

Study Timeline

• Study First Submitted: 2022-01-26
• Status Verified: 2022-03
• Study First Submitted QC: 2022-03-02
• Last Update Submitted: 2022-03-02
• Study Start: 2022-03-07
• Study First Posted: 2022-03-14
• Last Update Posted: 2022-03-14
• Primary Completion: 2022-07-31
• Study Completion: 2022-08-31

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 211

Inclusion Criteria

• patients requiring tracheal intubation for general anesthesia

Exclusion Criteria

• do not agree to participate in the study
• emergency surgery
• predicted difficult intubation
• very weak teeth (especially central teeth)

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
The length of optimal preliminary insertion depth of FOB (centimeters)	during tracheal intubation	The length of optimal preliminary insertion depth of FOB means the insertion depth of it from the philtrum, the upper lip, or the incisors where the clinicians can see easily the glottic opening while they are flexing the FOB. And that will be recorded as centimeters.

Trial Locations

Locations (1)

Seoul Metropolitan Government Seoul National University Boramae Medical Center; 🇰🇷 Seoul, Korea, Republic of