Airway ManagementKVVLNCT07174050
King Vision vs Macintosh Laryngoscopy for Intubation Time in Novice Users
A study testing King Vision Channeled Video Laryngoscope and Macintosh Laryngoscopy in people with Airway Management and Endotracheal Intubation, run by Hitit University at 1 site in Turkey (Türkiye).
Trial summary
This study evaluated two different devices used for placing a breathing tube (endotracheal intubation) in adult patients undergoing elective surgery. The aim was to compare the King Vision videolaryngoscope, which has a camera and a guiding channel for the tube, with the traditional Macintosh laryngoscope, which… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Airway Management, Endotracheal Intubation, Tracheal Intubation, Elective Surgery
- What is being tested?
- King Vision Channeled Video Laryngoscope and Macintosh Laryngoscopy
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 70 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Jan 2023to 1 Jan 2024
- 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 (≥18 years old) scheduled for elective surgery under general anesthesia requiring orotracheal intubation
- American Society of Anesthesiologists (ASA) physical status I-II
- Mallampati airway classification I-II
- Written informed consent obtained from the patient
Who cannot join
- Predicted or known difficult airway: Mallampati III-IV, inter-incisor distance <2.5 cm, thyromental distance <6 cm, limited cervical spine mobility
- History of difficult intubation or need for awake/rapid-sequence intubation
- Upper airway pathology (tumour, trauma, infection), limited mouth opening, or craniofacial anomalies
- Emergency surgery, high aspiration risk, or full stomach
- Severe cardiopulmonary instability (e.g., shock, severe hypoxaemia)
- Pregnancy or breastfeeding
- BMI >35 kg/m² (if your protocol excludes obesity; remove if not applicable)
- Participation refusal or inability to consent
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Comparison of the King Vision Channeled Videolaryngoscope and Conventional Laryngoscopy for Endotracheal Intubation Time in Novice Users: A Prospective, Randomised Controlled Trial
This study evaluated two different devices used for placing a breathing tube (endotracheal intubation) in adult patients undergoing elective surgery. The aim was to compare the King Vision videolaryngoscope, which has a camera and a guiding channel for the tube, with the traditional Macintosh laryngoscope, which allows doctors to look directly at the vocal cords. The study focused on how long it takes to successfully insert the tube, the need for additional maneuvers during the procedure, and the overall success rate of first attempts. The procedures were performed by novice operators under supervision.
- Being tested
- King Vision Channeled Video Laryngoscope, Macintosh Laryngoscopy
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
King Vision Channeled Video LaryngoscopeDevice
King Vision Videolaryngoscope (KVVL) is one of the new indirect laryngoscopes with disposable (either with channeled or non-channeled) blades .Both designs include an anti-fog lens coating . The channelled KVVL has a rigid blade with an integrated channel for introducing the endotracheal tube. The height and width of the standard non-channeled and channeled blades are 13 mm and 26 mm vs 18 mm and 29 mm, respectively. The KVVL has a unique design and high-quality image . It has a camera that enables a clear view of the glottis. It is a solid, portable, battery-operated device with an organic LED display for video laryngoscopy . It allows better glottis visualization and Cormack Lehane score than DL. Compared with Airtraq, the KVVL has wide field of view (160° vs 80° respectively) and potentially shortens the time to tracheal intubation .
Macintosh LaryngoscopyDevice
In clinical practice, direct laryngoscopy (DL) with either a curved (Macintosh) or straight (Miller) blade is a well-known and reliable technique in the hands of an experienced operator.
| Study group | Role | What they receive |
|---|---|---|
| Group K | Experimental | Channelled blade of KVVL Receives: Device: King Vision Channeled Video Laryngoscope |
| Group M | Active comparator | Macintosh laryngoscope Receives: Device: Macintosh Laryngoscopy |
What is being measured
The primary outcome is the main question the study is designed to answer.
Time to successful endotracheal intubation (seconds)
Measured from insertion of the laryngoscope blade between the patient's incisors until removal of the blade after correct placement of the endotracheal tube, confirmed by capnography.
Measured: During intubation (intraoperative period, approximately 1-2 minutes)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Sep 2025
- Study start1 Jan 2023
- Primary completion31 Jul 2023
- Study completion1 Jan 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Airway ManagementStudies 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
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 70 participants (actual)
Sponsor and investigators
- Lead sponsor
- Hitit University
- Sponsor type
- University, hospital or other
- Collaborators
- Izmir City Hospital
- Responsible party
- Principal investigator, Murat KAYKAC, Izmir City Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07174050
- Sponsor's protocol ID
- KINGVISON1
- Other IDs
- 2018/5
- Acronym
- KVVL
- Status last verified
- Sep 2025
- First submitted
- 8 Sep 2025
- Last updated
- 15 Sep 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 15 Sep 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of the King Vision Channeled Videolaryngoscope and Conventional Laryngoscopy for Endotracheal Intubation Time in Novice Users: A Prospective, Randomised Controlled Trial
- ClinicalTrials.gov ID
- NCT07174050
- Acronym / sponsor ID
- KVVL / KINGVISON1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 70 participants (actual)
- Lead sponsor
- Hitit UniversityUniversity, hospital or other
- Collaborators
- Izmir City Hospital
- Study start
- 1 Jan 2023 (actual)
- Primary completion
- 31 Jul 2023 (actual)
- Study completion
- 1 Jan 2024 (actual)
- First posted
- 15 Sep 2025 (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.
This study evaluated two different devices used for placing a breathing tube (endotracheal intubation) in adult patients undergoing elective surgery. The aim was to compare the King Vision videolaryngoscope, which has a camera and a guiding channel for the tube, with the traditional Macintosh laryngoscope, which allows doctors to look directly at the vocal cords. The study focused on how long it takes to successfully insert the tube, the need for additional maneuvers during the procedure, and the overall success rate of first attempts. The procedures were performed by novice operators under supervision.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Group K | Experimental | Device: King Vision Channeled Video LaryngoscopeChannelled blade of KVVL |
| Group M | Active comparator | Device: Macintosh LaryngoscopyMacintosh laryngoscope |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Adult patients (≥18 years old) scheduled for elective surgery under general anesthesia requiring orotracheal intubation
- American Society of Anesthesiologists (ASA) physical status I-II
- Mallampati airway classification I-II
- Written informed consent obtained from the patient
Key exclusion criteria (8 listed)
- Predicted or known difficult airway: Mallampati III-IV, inter-incisor distance <2.5 cm, thyromental distance <6 cm, limited cervical spine mobility
- History of difficult intubation or need for awake/rapid-sequence intubation
- Upper airway pathology (tumour, trauma, infection), limited mouth opening, or craniofacial anomalies
- Emergency surgery, high aspiration risk, or full stomach
- Severe cardiopulmonary instability (e.g., shock, severe hypoxaemia)
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 |
|---|---|---|
| King Vision Channeled Video LaryngoscopeKing Vision Videolaryngoscope (KVVL) is one of the new indirect laryngoscopes with disposable (either with channeled or non-channeled) blades .Both designs include an anti-fog lens coating . The channelled KVVL has a rigid blade with an integrated channel for introducing the endotracheal tube. The height and width of the standard non-channeled and channeled blades are 13 mm and 26 mm vs 18 mm and 29 mm, respectively. The KVVL has a unique design and high-quality image . It has a camera that enables a clear view of the glottis. It is a solid, portable, battery-operated device with an organic LED display for video laryngoscopy . It allows better glottis visualization and Cormack Lehane score than DL. Compared with Airtraq, the KVVL has wide field of view (160° vs 80° respectively) and potentially shortens the time to tracheal intubation . | Device | Group K |
| Macintosh LaryngoscopyIn clinical practice, direct laryngoscopy (DL) with either a curved (Macintosh) or straight (Miller) blade is a well-known and reliable technique in the hands of an experienced operator. | Device | Group M |
Primary outcome
Time to successful endotracheal intubation (seconds)
Time frame: During intubation (intraoperative period, approximately 1-2 minutes)
Measured from insertion of the laryngoscope blade between the patient's incisors until removal of the blade after correct placement of the endotracheal tube, confirmed by capnography.
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 15 Sep 2025.
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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?
A study testing King Vision Channeled Video Laryngoscope and Macintosh Laryngoscopy in people with Airway Management and Endotracheal Intubation, run by Hitit University at 1 site in Turkey (Türkiye).
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 4 inclusion and 8 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 15 Sep 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 Turkey (Türkiye). 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?
Time to successful endotracheal intubation (seconds) (time frame: During intubation (intraoperative period, approximately 1-2 minutes)). 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 15 Sep 2025.