Airway Complication of AnesthesiaNCT04065412
Modified Laryngeal Handshake Technique
A study testing Conventional laryngeal handshake technique and Modified laryngeal handshake technique in people with Airway Complication of Anesthesia, run by SMG-SNU Boramae Medical Center at 1 site in South Korea.
Trial summary
In this study, we compare the conventional laryngeal handshake technique and modified laryngeal handshake technique for locating the cricothyroid membrane in terms of accuracy and speed. Read more about this study
- Who is it for?
- Ages 20 years and older, women only
- Conditions the study is for
- Airway Complication of Anesthesia
- What is being tested?
- Conventional laryngeal handshake technique and Modified laryngeal handshake technique
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 200 participants
- Where
- 1 siteSouth Korea
- Study dates
- 5 Mar 2020to 30 Nov 2020
- 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 20 years and older
- Women only
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients who would be scheduled elective surgery under general anesthesia
Who cannot join
- Diseases or anatomical abnormalities in the neck or larynx
- History of neck surgery
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Modified Laryngeal Handshake Technique for Locating the Cricothyroid Membrane
In this study, we compare the conventional laryngeal handshake technique and modified laryngeal handshake technique for locating the cricothyroid membrane in terms of accuracy and speed. The conventional laryngeal handshake technique is performed with the non-dominant hand, identifying the hyoid bone and thyroid laminae, stabilizing the larynx between thumb and middle finger, and moving down the neck to palpate the cricothyroid membrane with the index finger.
The modified laryngeal handshake is performed with the non-dominant hand, stabilizing the trachea between thumb and middle finger from the suprasternal notch and moving up the neck to palate the cricoid cartilage and cricothyroid membrane with the index finger.
- Conditions
- Airway Complication of Anesthesia
- Being tested
- Conventional laryngeal handshake technique, Modified laryngeal handshake technique
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Conventional laryngeal handshake techniqueProcedure or surgery
The conventional laryngeal handshake technique is performed with the non-dominant hand, identifying the hyoid bone and thyroid laminae, stabilizing the larynx between thumb and middle finger, and moving down the neck to palpate the cricothyroid membrane with the index finger.
Modified laryngeal handshake techniqueProcedure or surgery
The modified laryngeal handshake is performed with the non-dominant hand, stabilizing the trachea between thumb and middle finger from the suprasternal notch and moving up the neck to palate the cricoid cartilage and cricothyroid membrane with the index finger.
| Study group | Role | What they receive |
|---|---|---|
| Conventional laryngeal handshake technique | Active comparator | The conventional laryngeal handshake technique is performed to localize the cricothyroid membrane Receives: Procedure: Conventional laryngeal handshake technique |
| Modified laryngeal handshake technique | Experimental | The modified laryngeal handshake is performed to localize the cricothyroid membrane Receives: Procedure: Modified laryngeal handshake technique |
What is being measured
The primary outcome is the main question the study is designed to answer.
The accuracy to localize the cricothyoid membrane
The accuracy of the cricothyroid membrane identified by the conventional and modified handshake techniques are evaluated.
Measured: 1 minute after identifying the cricothyroid membrane using the conventional or modified laryngeal handshake technique
Secondary outcomes (3)
The accuracy to localize the midline of the neck
The accuracy of the midline of the neck identified by the conventional and modified handshake techniques are evaluated.
Measured: through the identification of cricothyroid membrane, an average of 5 minutes
The vertical and horizontal distances between the actual and perceived cricothyroid membrane
The vertical and horizontal distances between the actual and perceived cricothyroid membrane using the conventional and modified handshake techniques are evaluated.
Measured: through the identification of cricothyroid membrane, an average of 5 minutes
Time to localize the cricothyroid membrane
The time taken to identify the cricothyroid membrane is recorded.
Measured: through the identification of cricothyroid membrane, an average of 5 minutes
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Aug 2019
- Study start5 Mar 2020
- Primary completion30 Nov 2020
- Study completion30 Nov 2020
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 Airway Complication of AnesthesiaStudies of the same condition, open and under way.
- 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
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Care provider
- Enrolment
- 200 participants (actual)
Sponsor and investigators
- Lead sponsor
- SMG-SNU Boramae Medical Center
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Jin-Young Hwang, SMG-SNU Boramae Medical Center
- Investigators
- Jin-Young Hwang, MD, PhD, Principal investigator, SMG-SNU Boramae Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04065412
- Sponsor's protocol ID
- 2019208
- Status last verified
- Jan 2021
- First submitted
- 21 Aug 2019
- Last updated
- 28 Jan 2021
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Publications
Chang JE, Kim H, Won D, Lee JM, Kim TK, Min SW, Hwang JY. Comparison of the Conventional Downward and Modified Upward Laryngeal Handshake Techniques to Identify the Cricothyroid Membrane: A Randomized, Comparative Study. Anesth Analg. 2021 Nov 1;133(5):1288-1295. doi: 10.1213/ANE.0000000000005744.
PubMed 34517392
Study at a glance
From the registry record, last updated by the sponsor on 28 Jan 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Modified Laryngeal Handshake Technique for Locating the Cricothyroid Membrane
- ClinicalTrials.gov ID
- NCT04065412
- Acronym / sponsor ID
- 2019208
- Conditions
- Airway Complication of Anesthesia
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 200 participants (actual)
- Lead sponsor
- SMG-SNU Boramae Medical CenterUniversity, hospital or other
- Study start
- 5 Mar 2020 (actual)
- Primary completion
- 30 Nov 2020 (actual)
- Study completion
- 30 Nov 2020 (actual)
- First posted
- 22 Aug 2019 (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.
In this study, we compare the conventional laryngeal handshake technique and modified laryngeal handshake technique for locating the cricothyroid membrane in terms of accuracy and speed. The conventional laryngeal handshake technique is performed with the non-dominant hand, identifying the hyoid bone and thyroid laminae, stabilizing the larynx between thumb and middle finger, and moving down the neck to palpate the cricothyroid membrane with the index finger.
The modified laryngeal handshake is performed with the non-dominant hand, stabilizing the trachea between thumb and middle finger from the suprasternal notch and moving up the neck to palate the cricoid cartilage and cricothyroid membrane with the index finger.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, care provider)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Conventional laryngeal handshake technique | Active comparator | Procedure: Conventional laryngeal handshake techniqueThe conventional laryngeal handshake technique is performed to localize the cricothyroid membrane |
| Modified laryngeal handshake technique | Experimental | Procedure: Modified laryngeal handshake techniqueThe modified laryngeal handshake is performed to localize the cricothyroid membrane |
Who may qualify
- Ages
- 20 years and older
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Patients who would be scheduled elective surgery under general anesthesia
Key exclusion criteria (2 listed)
- Diseases or anatomical abnormalities in the neck or larynx
- History of neck 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 |
|---|---|---|
| Conventional laryngeal handshake techniqueThe conventional laryngeal handshake technique is performed with the non-dominant hand, identifying the hyoid bone and thyroid laminae, stabilizing the larynx between thumb and middle finger, and moving down the neck to palpate the cricothyroid membrane with the index finger. | Procedure or surgery | Conventional laryngeal handshake technique |
| Modified laryngeal handshake techniqueThe modified laryngeal handshake is performed with the non-dominant hand, stabilizing the trachea between thumb and middle finger from the suprasternal notch and moving up the neck to palate the cricoid cartilage and cricothyroid membrane with the index finger. | Procedure or surgery | Modified laryngeal handshake technique |
Primary outcome
The accuracy to localize the cricothyoid membrane
Time frame: 1 minute after identifying the cricothyroid membrane using the conventional or modified laryngeal handshake technique
The accuracy of the cricothyroid membrane identified by the conventional and modified handshake techniques are evaluated.
3 secondary outcomes
The accuracy to localize the midline of the neck
Time frame: through the identification of cricothyroid membrane, an average of 5 minutes
The vertical and horizontal distances between the actual and perceived cricothyroid membrane
Time frame: through the identification of cricothyroid membrane, an average of 5 minutes
Time to localize the cricothyroid membrane
Time frame: through the identification of cricothyroid membrane, an average of 5 minutes
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 28 Jan 2021.
- Derived from this study: PubMed 34517392Chang JE, Kim H, Won D, Lee JM, Kim TK, Min SW, Hwang JY. Comparison of the Conventional Downward and Modified Upward Laryngeal Handshake Techniques to Identify the Cricothyroid Membrane: A Randomized, Comparative Study. Anesth Analg. 2021 Nov 1;133(5):1288-1295. doi: 10.1213/ANE.0000000000005744.
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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.
Jin-Young Hwang, MD, PhD 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 Conventional laryngeal handshake technique and Modified laryngeal handshake technique in people with Airway Complication of Anesthesia, run by SMG-SNU Boramae Medical Center 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 2 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 28 Jan 2021. 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?
The accuracy to localize the cricothyoid membrane (time frame: 1 minute after identifying the cricothyroid membrane using the conventional or modified laryngeal handshake technique). 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 NCT04065412, 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 28 Jan 2021; AzTrials last refreshed its copy on 28 Oct 2026.