Cricoid PressureNCT06441175
Effectiveness of Cricoid Pressure During Videolaryngoscopy Versus Direct Laryngoscopy
A study testing Direct laryngoscopy with cricoid pressure and Videolaryngoscopy with cricoid pressure in people with Cricoid Pressure, run by Seoul National University Hospital at 1 site in South Korea.
Trial summary
Compare the success rate of upper esophageal obstruction with cricoid pressure during videolaryngoscopy and direct laryngoscopy. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Cricoid Pressure
- What is being tested?
- Direct laryngoscopy with cricoid pressure and Videolaryngoscopy with cricoid pressure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 66 participants
- Where
- 1 siteSouth Korea
- Study dates
- 1 Sep 2024to 30 Sep 2025
- Phase
- Interventional
- 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 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Adult patients scheduled to have general anesthesia with tracheal intubation
Who cannot join
- Gastroesophageal reflux disease, achalasia, bowel obstruction,
- BMI > 35 kg/m2
- Uncontrolled diabetes
- Pregnancy
- Previous esophageal, and gastric surgery
- Dental damage or anticipated difficult airways
- Who do not consent to the study
Trial locations and contacts
1 site in 1 country.
South Korea1 site
Seoul Metropolitan Government-Seoul National University Boramae Medical Center
Seoul
About this study
Official title: Comparison of the Effectiveness of Cricoid Pressure on Upper Esophageal Obstruction During Videolaryngoscopy Versus Direct Laryngoscopy: a Randomized, Crossover Study
Compare the success rate of upper esophageal obstruction with cricoid pressure during videolaryngoscopy and direct laryngoscopy.
Read the detailed description
Even with appropriate cricoid pressure, the lifting force of the laryngoscope during direct laryngoscopy for tracheal intubation may counteract the cricoid pressure, making esophageal obstruction ineffective. Compared to direct laryngoscopy, videolaryngoscopy requires less lifting force, and thus, the success rate of esophageal obstruction may be higher. This study aims to compare the success rate of upper esophageal obstruction with cricoid pressure during videolaryngoscopy and direct laryngoscopy.
- Conditions
- Cricoid Pressure
- Being tested
- Direct laryngoscopy with cricoid pressure, Videolaryngoscopy with cricoid pressure
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Direct laryngoscopy with cricoid pressureOther
Direct laryngoscopy with cricoid pressure
Videolaryngoscopy with cricoid pressureOther
Videolaryngoscopy with cricoid pressure
| Study group | Role | What they receive |
|---|---|---|
| D-V group | Experimental | the group that performs direct laryngoscopy first and then videolaryngoscopy Receives: Other: Direct laryngoscopy with cricoid pressure; Other: Videolaryngoscopy with cricoid pressure |
| V-D group | Experimental | the group that performs videolaryngoscopy first and then directlaryngoscopy Receives: Other: Direct laryngoscopy with cricoid pressure; Other: Videolaryngoscopy with cricoid pressure |
What is being measured
The primary outcome is the main question the study is designed to answer.
Success rate of esophageal obstruction during cricoid pressure
Success rate of esophageal obstruction during cricoid pressure
Measured: During general anesthesia induction
Secondary outcomes (3)
Esophageal diameter
Esophageal diameter measured by ultrasound
Measured: During cricoid pressure
percentage of glottic opening score
percentage of glottic opening
Measured: During cricoid pressure
Cormack-Lehane grade
views obtained by laryngoscopy
Measured: During cricoid pressure
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Jun 2024
- Study start1 Sep 2024
- Primary completion30 Jun 2025
- Study completion30 Sep 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Cricoid PressureStudies 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 66 participants (actual)
Sponsor and investigators
- Lead sponsor
- Seoul National University Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- SMG-SNU Boramae Medical Center
- Responsible party
- Sponsor
- Investigators
- TAE KYONG KIM, Principal investigator, SMG-SNU Boramae Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06441175
- Sponsor's protocol ID
- CP during videolaryngoscopy
- Status last verified
- Oct 2026
- First submitted
- 28 May 2024
- Last updated
- 16 Oct 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 16 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of the Effectiveness of Cricoid Pressure on Upper Esophageal Obstruction During Videolaryngoscopy Versus Direct Laryngoscopy: a Randomized, Crossover Study
- ClinicalTrials.gov ID
- NCT06441175
- Acronym / sponsor ID
- CP during videolaryngoscopy
- Conditions
- Cricoid Pressure
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 66 participants (actual)
- Lead sponsor
- Seoul National University HospitalUniversity, hospital or other
- Collaborators
- SMG-SNU Boramae Medical Center
- Study start
- 1 Sep 2024 (actual)
- Primary completion
- 30 Jun 2025 (actual)
- Study completion
- 30 Sep 2025 (actual)
- First posted
- 4 Jun 2024 (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.
Compare the success rate of upper esophageal obstruction with cricoid pressure during videolaryngoscopy and direct laryngoscopy.
Detailed description
Even with appropriate cricoid pressure, the lifting force of the laryngoscope during direct laryngoscopy for tracheal intubation may counteract the cricoid pressure, making esophageal obstruction ineffective. Compared to direct laryngoscopy, videolaryngoscopy requires less lifting force, and thus, the success rate of esophageal obstruction may be higher. This study aims to compare the success rate of upper esophageal obstruction with cricoid pressure during videolaryngoscopy and direct laryngoscopy.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| D-V group | Experimental | Other: Direct laryngoscopy with cricoid pressure, Other: Videolaryngoscopy with cricoid pressurethe group that performs direct laryngoscopy first and then videolaryngoscopy |
| V-D group | Experimental | Other: Direct laryngoscopy with cricoid pressure, Other: Videolaryngoscopy with cricoid pressurethe group that performs videolaryngoscopy first and then directlaryngoscopy |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Adult patients scheduled to have general anesthesia with tracheal intubation
Key exclusion criteria (7 listed)
- Gastroesophageal reflux disease, achalasia, bowel obstruction,
- BMI > 35 kg/m2
- Uncontrolled diabetes
- Pregnancy
- Previous esophageal, and gastric surgery
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Direct laryngoscopy with cricoid pressureDirect laryngoscopy with cricoid pressure | Other | D-V group, V-D group |
| Videolaryngoscopy with cricoid pressureVideolaryngoscopy with cricoid pressure | Other | D-V group, V-D group |
Primary outcome
Success rate of esophageal obstruction during cricoid pressure
Time frame: During general anesthesia induction
Success rate of esophageal obstruction during cricoid pressure
3 secondary outcomes
Esophageal diameter
Time frame: During cricoid pressure
percentage of glottic opening score
Time frame: During cricoid pressure
Cormack-Lehane grade
Time frame: During cricoid pressure
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 16 Oct 2026.
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PARAtracheal vs CRIcoid Pressure on GLIttic DEformation (PARAGLIDE)
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Validation of a Novel Handheld Device for Accurate Cricoid Pressure in Healthy Volunteers
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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.
TAE KYONG KIM principal investigator
SMG-SNU Boramae Medical Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Direct laryngoscopy with cricoid pressure and Videolaryngoscopy with cricoid pressure in people with Cricoid Pressure, 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 1 inclusion and 7 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 16 Oct 2026. 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?
Success rate of esophageal obstruction during cricoid pressure (time frame: During general anesthesia induction). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 16 Oct 2026.