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CompletedNCT05968781Updated Jul 2, 2025

Predictive Factors for Successful Videolaryngoscopic Intubation Without Stylet

An observational study in Intubation; Difficult or Failed and Videolaryngoscopy, sponsored by Seoul National University Hospital. Completed at 1 site in South Korea. Open to participants aged 19 Years and older. Per ClinicalTrials.gov, last updated 2025-07-02.

Sponsored by Seoul National University Hospital · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
226
Ages
19 Years and older
Sex
All
01

Study summary

The investigators aimed to evaluate the predictive factors for successful videolaryngoscopic intubation without stylet.

02

Conditions studied

  • Intubation; Difficult or Failed
  • Videolaryngoscopy
03

In context

Lead sponsor

Seoul National University Hospital is the lead sponsor of 1,860 studies on the registry; 275 are open to participants now.

Of its 12 completed or terminated interventional studies of FDA-regulated products, 2 (17%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
19 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

Adult patients undergoing general anesthesia and endotracheal intubation

Inclusion criteria

  • Patients aged 19 years and older
  • Patients undergoing general anesthesia for elective surgery and requiring endotracheal intubation

Exclusion criteria

Exclusion Criteria:

  • Patients with suspected cervical spine injury
  • Patients requiring rapid sequence induction and intubation.
  • Patients with airway disorders
  • Body Mass Index > 35 kg/m2
  • Patients with a history of difficult intubation or, based on clinical judgment, anticipated difficult intubation
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
226 participants (actual)
Patient registry
No
06

What researchers measure

Primary outcomes

  1. First-pass success rate of videolaryngoscopic intubation without stylet

    An intubation attempt is defined as passing the laryngoscope blade between the patient's teeth. Duration of endotracheal intubation is defined from the moment the operator grasps the tube until the black line on the tube passes through the vocal cords

    Time frame: From the start of endotracheal intubation to 120 seconds

Secondary outcomes

  1. Success rate of videolaryngoscopic intubation without stylet using BURP maneuver after failure of the first attempt

    An intubation attempt is defined as passing the laryngoscope blade between the patient's teeth. Duration of endotracheal intubation is defined from the moment the operator grasps the tube until the black line on the tube passes through the vocal cords

    Time frame: From the start of endotracheal intubation to 120 seconds

  2. Incidence of using a stylet for the success of videolaryngoscopic intubation after the failure of the second attempt using the BURP maneuver

    An intubation attempt is defined as passing the laryngoscope blade between the patient's teeth. Duration of endotracheal intubation is defined from the moment the operator grasps the tube until the black line on the tube passes through the vocal cords

    Time frame: From the start of endotracheal intubation to 120 seconds

  3. Incidence of successful endotracheal intubation after the failure of the third attempt using stylet

    An intubation attempt is defined as passing the laryngoscope blade between the patient's teeth. Duration of endotracheal intubation is defined from the moment the operator grasps the tube until the black line on the tube passes through the vocal cords

    Time frame: From the start of endotracheal intubation to 120 seconds

  4. Time to completion of endotracheal intubation

    An intubation attempt is defined as passing the laryngoscope blade between the patient's teeth. Duration of endotracheal intubation is defined from the moment the operator grasps the tube until the black line on the tube passes through the vocal cords

    Time frame: From the start of endotracheal intubation to 120 seconds

07

Study locations

1 site
  • Seoul National University Hospital
    Seoul, South Korea
08

References and documents

Publications

  • Song SE, Jung JY, Jung CW, Park JY, Kim WH, Yoon HK. First-pass success rate and predictive factors for stylet use in videolaryngoscopic intubations with a Macintosh blade: a prospective observational study. Can J Anaesth. 2025 May;72(5):758-767. doi: 10.1007/s12630-025-02952-0. Epub 2025 Apr 25. PubMed 40281329 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 2, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05968781
Lead sponsor
Seoul National University Hospital
Responsible party
Hyun-Kyu Yoon (Clinical assistant professor, Seoul National University Hospital) — Principal investigator
First posted
Aug 1, 2023
Start date
Aug 22, 2023
Primary completion
Jan 22, 2024
Completion
Feb 28, 2025
Last update
Jul 2, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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