Tracheal IntubationIRRISNCT03930550
Infrared Transillumination of the Front of the Neck
A study testing Tracheal intubation by endoscopy with flexible bronchoscope in people with Tracheal Intubation, run by Copenhagen University Hospital, Rigshospitalet at 1 site in Denmark.
Trial summary
Infrared light is applied to the front of the neck of patients for awake flexible optical intubation. The infrared light can be detected by the camera at the tip of the flexible video-bronchoscope. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Tracheal Intubation
- What is being tested?
- Tracheal intubation by endoscopy with flexible bronchoscope
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 24 participants
- Where
- 1 siteDenmark
- Study dates
- 1 May 2019to 6 Jan 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 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients scheduled for awake tracheal intubation over the insertion cord of a flexible video-trachea-bronchoscope.
Who cannot join
- Age < 18 years
- Patients at high risk of aspiration of gastric content
- Patients with hypoxia, saturation < 90 % on ambient air
- Patients with audible stridor at rest
- American Society of Anesthesiology (ASA) physical class > 3
- contraindication for trans-crico-thyoid-membrane puncture (cancer, infection on the site, severely coagulopathies, inability to identify the crico-thyroid membrane)
Trial locations and contacts
1 site in 1 country.
Denmark1 site
Rigshospitalet, section for anaesthesia for ENT and Maxillofacial surgery, section 3071
Copenhagen, 2100
About this study
Official title: Infrared Transillumination of the Front of the Neck as an Aid for Awake Intubation
Infrared light is applied to the front of the neck of patients for awake flexible optical intubation. The infrared light can be detected by the camera at the tip of the flexible video-bronchoscope. The flexible scope is introduced into the trachea with or without the aid of the blinking infra red light and the ease of placement of the flexible scope is studied.
Read the detailed description
The investigators study patients for anaesthesia who will need endotracheal intubation and in whom the intubation is predicted to become difficult so that an awake flexible-video-scope-guided intubation is chosen.
Infrared light is applied to the front of the neck of patients for awake flexible optical intubation. The infrared light can be detected by the camera at the tip of the flexible video-bronchoscope. The flexible scope is introduced into the trachea with or without the aid of the blinking infra red light and the ease of placement of the flexible scope is studied.
- Conditions
- Tracheal Intubation
- Being tested
- Tracheal intubation by endoscopy with flexible bronchoscope
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Tracheal intubation by endoscopy with flexible bronchoscopeProcedure or surgery
A blinking infrared light source is placed on the anterior neck at the level of the cricothyroid membrane to serve as a guide to facilitate finding the way to the trachea
| Study group | Role | What they receive |
|---|---|---|
| Infrared guidance first | Experimental | In this arm the infra red guidance is applied to the first passage of the flexible scope to the trachea.
The second passage of the flexible scope is without the infrared light Receives: Procedure: Tracheal intubation by endoscopy with flexible bronchoscope |
| Infrared guidance last | Active comparator | In this arm NO infra red guidance is applied to the first passage of the flexible scope to the trachea.
The second passage of the flexible scope is with the infrared light as guide Receives: Procedure: Tracheal intubation by endoscopy with flexible bronchoscope |
What is being measured
The primary outcome is the main question the study is designed to answer.
Fraction of cases where the blinking light is seen before the vocal cords are seen
The flexible scope is entered into the airway twice, . It is noted from watching the videos of the procedures if the blinking light or the vocal cords are seen first -
Measured: 1 day of the procedure
Secondary outcomes (2)
Fraction of cases where the blinking light is seen from the teeth, the mouth, the pharynx and the larynx and the fra fraction of cases where the vocal cords are seen from the teeth, the mouth, the pharynx and the larynx
The flexible scope is entered into the airway twice, one time with and one time without the blinking light on the front of the neck. It is noted from watching the videos of the procedures if the blinking light or the vocal cords are seen first - and from which anatomical location it is seen.
Measured: 1 day of the procedure
Time from the tip of the flexible scope passes the teeth until vocal cords are seen
Time measured from the tip of the flexible scope passes the teeth until the vocal cords are seen
Measured: 1 day of the procedure
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Apr 2019
- Study start1 May 2019
- Primary completion6 Jan 2020
- Study completion6 Jan 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 Tracheal IntubationStudies of the same condition, open and under way.
- More trials run by Copenhagen University Hospital, RigshospitaletThe 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
- Supportive care
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 24 participants (actual)
Sponsor and investigators
- Lead sponsor
- Copenhagen University Hospital, Rigshospitalet
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Michael Seltz Kristensen, Copenhagen University Hospital, Rigshospitalet
- Investigators
- Michael S Kristensen, MD, Principal investigator, Copenhagen University Hospital, Rigshospitalet
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03930550
- Sponsor's protocol ID
- H-18038322 IRRIS
- Acronym
- IRRIS
- Status last verified
- Feb 2021
- First submitted
- 24 Apr 2019
- Last updated
- 23 Feb 2021
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
Publications
Kristensen MS, Hesselfeldt R, Brinkenfeldt HK, Biro P. Infrared flashing light through the cricothyroid membrane as guidance to awake intubation with a flexible bronchoscope: A randomised cross-over study. Acta Anaesthesiol Scand. 2023 Apr;67(4):432-439. doi: 10.1111/aas.14204. Epub 2023 Feb 2.
PubMed 36690598
Study at a glance
From the registry record, last updated by the sponsor on 23 Feb 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Infrared Transillumination of the Front of the Neck as an Aid for Awake Intubation
- ClinicalTrials.gov ID
- NCT03930550
- Acronym / sponsor ID
- IRRIS / H-18038322 IRRIS
- Conditions
- Tracheal Intubation
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 24 participants (actual)
- Lead sponsor
- Copenhagen University Hospital, RigshospitaletUniversity, hospital or other
- Study start
- 1 May 2019 (actual)
- Primary completion
- 6 Jan 2020 (actual)
- Study completion
- 6 Jan 2020 (actual)
- First posted
- 29 Apr 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.
Infrared light is applied to the front of the neck of patients for awake flexible optical intubation. The infrared light can be detected by the camera at the tip of the flexible video-bronchoscope. The flexible scope is introduced into the trachea with or without the aid of the blinking infra red light and the ease of placement of the flexible scope is studied.
Detailed description
The investigators study patients for anaesthesia who will need endotracheal intubation and in whom the intubation is predicted to become difficult so that an awake flexible-video-scope-guided intubation is chosen.
Infrared light is applied to the front of the neck of patients for awake flexible optical intubation. The infrared light can be detected by the camera at the tip of the flexible video-bronchoscope. The flexible scope is introduced into the trachea with or without the aid of the blinking infra red light and the ease of placement of the flexible scope is studied.
Study design
- Primary purpose
- Supportive care
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Infrared guidance first | Experimental | Procedure: Tracheal intubation by endoscopy with flexible bronchoscopeIn this arm the infra red guidance is applied to the first passage of the flexible scope to the trachea. The second passage of the flexible scope is without the infrared light |
| Infrared guidance last | Active comparator | Procedure: Tracheal intubation by endoscopy with flexible bronchoscopeIn this arm NO infra red guidance is applied to the first passage of the flexible scope to the trachea. The second passage of the flexible scope is with the infrared light as guide |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Patients scheduled for awake tracheal intubation over the insertion cord of a flexible video-trachea-bronchoscope.
Key exclusion criteria (6 listed)
- Age < 18 years
- Patients at high risk of aspiration of gastric content
- Patients with hypoxia, saturation < 90 % on ambient air
- Patients with audible stridor at rest
- American Society of Anesthesiology (ASA) physical class > 3
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 |
|---|---|---|
| Tracheal intubation by endoscopy with flexible bronchoscopeA blinking infrared light source is placed on the anterior neck at the level of the cricothyroid membrane to serve as a guide to facilitate finding the way to the trachea | Procedure or surgery | Infrared guidance first, Infrared guidance last |
Primary outcome
Fraction of cases where the blinking light is seen before the vocal cords are seen
Time frame: 1 day of the procedure
The flexible scope is entered into the airway twice, . It is noted from watching the videos of the procedures if the blinking light or the vocal cords are seen first -
2 secondary outcomes
Fraction of cases where the blinking light is seen from the teeth, the mouth, the pharynx and the larynx and the fra fraction of cases where the vocal cords are seen from the teeth, the mouth, the pharynx and the larynx
Time frame: 1 day of the procedure
Time from the tip of the flexible scope passes the teeth until vocal cords are seen
Time frame: 1 day of the procedure
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 23 Feb 2021.
- Derived from this study: PubMed 36690598Kristensen MS, Hesselfeldt R, Brinkenfeldt HK, Biro P. Infrared flashing light through the cricothyroid membrane as guidance to awake intubation with a flexible bronchoscope: A randomised cross-over study. Acta Anaesthesiol Scand. 2023 Apr;67(4):432-439. doi: 10.1111/aas.14204. Epub 2023 Feb 2.
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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.
Michael S Kristensen, MD principal investigator
Copenhagen University Hospital, Rigshospitalet
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Tracheal intubation by endoscopy with flexible bronchoscope in people with Tracheal Intubation, run by Copenhagen University Hospital, Rigshospitalet at 1 site in Denmark.
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 6 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 23 Feb 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 Denmark. 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?
Fraction of cases where the blinking light is seen before the vocal cords are seen (time frame: 1 day of the procedure). 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 NCT03930550, 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 23 Feb 2021; AzTrials last refreshed its copy on 8 Nov 2026.