Intubation; Difficult or FailedNCT05968781
Predictive Factors for Successful Videolaryngoscopic Intubation Without Stylet
An observational study of Intubation; Difficult or Failed and Videolaryngoscopy, run by Seoul National University Hospital at 1 site in South Korea.
Trial summary
The investigators aimed to evaluate the predictive factors for successful videolaryngoscopic intubation without stylet. Read more about this study
- Who is it for?
- Ages 19 years and older
- Conditions the study is for
- Intubation; Difficult or Failed, Videolaryngoscopy
- How many people
- 226 participants
- Where
- 1 siteSouth Korea
- Study dates
- 22 Aug 2023to 28 Feb 2025
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 19 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Adult patients undergoing general anesthesia and endotracheal intubation
Who may be able to join
- Patients aged 19 years and older
- Patients undergoing general anesthesia for elective surgery and requiring endotracheal intubation
Who cannot join
- 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
Trial locations and contacts
1 site in 1 country.
About this study
Official title: A Prospective Observational Study of Predictive Factors for Successful Videolaryngoscopic Intubation Without Stylet
The investigators aimed to evaluate the predictive factors for successful videolaryngoscopic intubation without stylet.
- Conditions
- Intubation; Difficult or Failed, Videolaryngoscopy
What is being measured
The primary outcome is the main question the study is designed to answer.
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
Measured: From the start of endotracheal intubation to 120 seconds
Secondary outcomes (4)
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
Measured: From the start of endotracheal intubation to 120 seconds
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
Measured: From the start of endotracheal intubation to 120 seconds
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
Measured: From the start of endotracheal intubation to 120 seconds
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
Measured: From the start of endotracheal intubation to 120 seconds
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted1 Aug 2023
- Study start22 Aug 2023
- Primary completion22 Jan 2024
- Study completion28 Feb 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Intubation; Difficult or FailedStudies of the same condition, open and under way.
- More trials run by Seoul National University HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 226 participants (actual)
Sponsor and investigators
- Lead sponsor
- Seoul National University Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Hyun-Kyu Yoon, Seoul National University Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05968781
- Sponsor's protocol ID
- 2307-023-1443
- Status last verified
- Jun 2025
- First submitted
- 20 Jul 2023
- Last updated
- 2 Jul 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
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
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Prospective Observational Study of Predictive Factors for Successful Videolaryngoscopic Intubation Without Stylet
- ClinicalTrials.gov ID
- NCT05968781
- Acronym / sponsor ID
- 2307-023-1443
- Conditions
- Intubation; Difficult or Failed, Videolaryngoscopy
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 226 participants (actual)
- Lead sponsor
- Seoul National University HospitalUniversity, hospital or other
- Study start
- 22 Aug 2023 (actual)
- Primary completion
- 22 Jan 2024 (actual)
- Study completion
- 28 Feb 2025 (actual)
- First posted
- 1 Aug 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The investigators aimed to evaluate the predictive factors for successful videolaryngoscopic intubation without stylet.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 19 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Adult patients undergoing general anesthesia and endotracheal intubation
Key inclusion criteria (2 listed)
- Patients aged 19 years and older
- Patients undergoing general anesthesia for elective surgery and requiring endotracheal intubation
Key exclusion criteria (5 listed)
- 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
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
First-pass success rate of videolaryngoscopic intubation without stylet
Time frame: From the start of endotracheal intubation to 120 seconds
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
4 secondary outcomes
Success rate of videolaryngoscopic intubation without stylet using BURP maneuver after failure of the first attempt
Time frame: From the start of endotracheal intubation to 120 seconds
Incidence of using a stylet for the success of videolaryngoscopic intubation after the failure of the second attempt using the BURP maneuver
Time frame: From the start of endotracheal intubation to 120 seconds
Incidence of successful endotracheal intubation after the failure of the third attempt using stylet
Time frame: From the start of endotracheal intubation to 120 seconds
Time to completion of endotracheal intubation
Time frame: From the start of endotracheal intubation to 120 seconds
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jul 2025.
- Derived from this study: PubMed 40281329Song 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.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Intubation; Difficult or Failed and Videolaryngoscopy, run by Seoul National University Hospital at 1 site in South Korea.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Jul 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in South Korea. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
First-pass success rate of videolaryngoscopic intubation without stylet (time frame: From the start of endotracheal intubation to 120 seconds). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05968781, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Jul 2025.