Intubation; Difficult or FailedNCT06656546
Comparison of Ultrasound Techniques for Assessment of Endotracheal Tube Placement
A study testing Tracheal Ultrasound, Lung Ultrasound and Diaphragm Ultrasound in people with Intubation; Difficult or Failed, run by Marmara University Pendik Training and Research Hospital at 1 site in Turkey (Türkiye).
Trial summary
This study is a single-center, randomized clinical trial conducted in an emergency department on intubated patients with rapid sequence intubation. Two sonographers will independently verify the accuracy of the intubation site using the assigned intubation method (tracheal, lung-sliding, or diaphragm) according to the… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Intubation; Difficult or Failed
- What is being tested?
- Tracheal Ultrasound, Lung Ultrasound and Diaphragm Ultrasound
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 200 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Jun 2024to 19 Jun 2025
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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 in the emergency department who require endotracheal intubation (ETI) based on the decision of the primary physician and are intubated using the rapid sequence intubation method.
- Patients aged >18 years will be included in the study.
Who cannot join
- Pregnant patients.
- Patients with a history of neck or chest surgery that may interfere with ultrasound evaluation.
- Patients with cervical spine disease or a history of surgery that could affect diaphragmatic movement.
- Patients diagnosed conditions such as pneumothorax that could affect lung ultrasound results, or those in whom pneumothorax is detected upon further evaluation,
- Patients who, after being enrolled, withdraw consent either personally or through a relative.
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Marmara University Pendik Training and Research Hospital
Istanbul, 34687
About this study
Official title: Comparison of Three Point-of-care Ultrasound Techniques to Confirm Endotracheal Tube Placement: a Randomized Clinical Trial
This study is a single-center, randomized clinical trial conducted in an emergency department on intubated patients with rapid sequence intubation. Two sonographers will independently verify the accuracy of the intubation site using the assigned intubation method (tracheal, lung-sliding, or diaphragm) according to the randomization sequence. Each sonographer will be blinded to the other verification methods (physical examination, end-tidal carbon dioxide) being used. The study's primary objective is to compare the diagnostic accuracy of different intubation techniques.
Read the detailed description
In emergency medicine, endotracheal intubation (ETI) is commonly performed for patients who require airway management due to acute respiratory failure, inadequate oxygenation or ventilation, or an inability to protect the airway resulting from altered consciousness. When ETI is performed outside of a cardiac arrest scenario, a series of steps are followed to optimize the procedure. These steps aim to prevent hypoxia, maintain hemodynamic stability, reduce the risk of aspiration, and increase the success rate of ETI. This methodical approach is known as Rapid Sequence Intubation (RSI). RSI involves preparing the necessary and auxiliary equipment, administering premedication, ensuring oxygenation, and applying anesthetic and neuromuscular blocking agents, followed by the placement of the endotracheal tube (ETT). The procedure concludes with confirming the ETT's placement and providing post-intubation care.
The primary goal of ETI is to position the ETT through the vocal cords into the trachea, ensuring that both lungs are ventilated effectively. Incorrect or unrecognized endobronchial intubation can result in hypoventilation and collapse of the non-ventilated lung, while the over-ventilated lung may suffer barotrauma or pneumothorax. Unrecognized esophageal intubation, on the other hand, can lead to failure in ventilation, resulting in hypoxia and subsequent complications, including brain damage and other morbidities. Therefore, ensuring the correct placement of the ETT is crucial to avoid serious adverse outcomes.
Various methods have been described to confirm correct ETT placement, including direct visualization during intubation, observation of chest wall movements, bilateral auscultation of lung sounds, end-tidal carbon dioxide (EtCO2) monitoring, fiberoptic bronchoscopy, and chest X-ray. Among these, capnography is considered the gold standard. However, in specific clinical situations, EtCO2 monitoring may be unreliable. Patients in cardiac arrest, patients with severe hypotension, pulmonary embolism, or poor pulmonary reserve may present lower than expected EtCO2 values. Similarly, gastric insufflation, using antacids, or consuming carbonated beverages may result in false-positive readings.
The American College of Emergency Physicians (ACEP) guidelines recommend the use of additional confirmation methods after ETT placement. Ultrasound (US) has emerged as a relatively new technique for confirming ETI. Its advantages include being non-invasive, portable, rapid, and capable of providing real-time, accurate results. Additionally, the US is unaffected by environmental noise, which can be challenging in noisy environments such as the emergency department. It is also not influenced by changes in pulmonary blood flow.
Several ultrasound techniques have been described to confirm ETT placement. The most commonly used methods include direct visualization of the ETT during intubation (tracheal ultrasound), detection of the "lung sliding" sign via lung ultrasound to indicate lung aeration and bilateral identification of diaphragmatic movement. Tracheal ultrasound can detect esophageal intubation before ventilation begins, preventing unnecessary gastric insufflation and its associated complications. The lung sliding sign and bilateral diaphragmatic movement techniques can help identify endobronchial intubation by visualizing pleural and diaphragmatic movement, respectively, thereby complementing tracheal ultrasound and reducing the risk of missed endobronchial intubation.
A comprehensive literature review revealed that no studies have directly compared these three ultrasound methods. Therefore, this study aims to evaluate the effectiveness of these three ultrasound techniques in confirming ETT placement and to compare the time required for each method. A secondary objective is to compare the time spent using ultrasound with that of auscultation and capnography. Additionally, this study will assess the ability of each ultrasound technique to detect tracheal intubation and, if present, accidental esophageal intubation across all patients.
- Conditions
- Intubation; Difficult or Failed
- Being tested
- Tracheal Ultrasound, Lung Ultrasound, Diaphragm Ultrasound
- Keywords
- Ultrasonography, Rapid sequence intubation, End-tidal carbondioxide, Endotracheal intubation, point-of-care ultrasound, transtracheal ultrasound, lung ultrasound, diaphragm ultrasound, emergency department
- Medical subject headings
- Emergencies
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Tracheal UltrasoundDiagnostic test
In the clinic, one of the routinely used ultrasound machines, either the HM70 EVO Linear Probe (5-12 MHz) or the eSaote MyLab Seven Linear Probe (3-13 MHz), will be selected based on suitability for the procedure at the time. A linear transducer will be placed perpendicular to the trachea at the level of the cricoid membrane. During ETI, visualization of the ETT moving within the trachea, specifically behind the cricothyroid membrane, indicates successful intubation. In contrast, if the ETT is mistakenly placed in the esophagus, a double-lumen appearance lateral to the trachea, created by the ETT within the esophagus, suggests esophageal intubation.
Lung UltrasoundDiagnostic test
Also called Lung Sliding
In the clinic, one of the routinely used ultrasound machines, either the HM70 EVO Linear Probe (5-12 MHz) or the eSaote MyLab Seven Linear Probe (3-13 MHz), will be selected based on suitability for the procedure at the time. Following ETI, the presence of lung sliding will be evaluated using ultrasound with the aid of a linear probe. The transducer will be placed bilaterally along the mid-clavicular line, between the second and fifth intercostal spaces, in a coronal orientation. After the ETT is placed and ventilation is initiated, the movement of the visceral and parietal pleura will be assessed. The presence of sliding motion between these pleural layers during ventilation indicates successful intubation, whereas the absence of this movement suggests a failed intubation.
Diaphragm UltrasoundDiagnostic test
Also called Diaphragm Excursion
In the clinic, one of the routinely used ultrasound machines, either the HM70 EVO Curvilinear Probe (2-8 MHz) or the eSaote MyLab Seven Curvilinear Probe (1-8 MHz), will be selected based on suitability for the procedure at the time. Using a curvilinear transducer, the probe will be placed along the mid-axillary line, approximately at the seventh to ninth intercostal spaces, in a coronal orientation. The movement of the diaphragm during ventilation will be assessed over the spleen and liver. Diaphragmatic motion during ventilation indicates successful ETI, while the absence of bilateral diaphragmatic movement suggests esophageal intubation. If diaphragmatic movement is only observed on one side, it is indicative of endobronchial intubation.
| Study group | Role | What they receive |
|---|---|---|
| Tracheal Ultrasound | Experimental | The success of endotracheal intubation (ETI) will be checked by tracheal ultrasonography. The primary outcome will be the placement of the endotracheal tube (ETT) in the trachea or esophagus. The secondary outcome will assess the duration of the ultrasound procedure. The time measurement will begin immediately after the placement of the ETT and will continue until a decision is made, via ultrasound, regarding whether the intubation is tracheal or esophageal. Receives: Diagnostic Test: Tracheal Ultrasound |
| Lung Ultrasound | Experimental | The success of ETI will be checked by lung ultrasonography. The primary outcome will be the placement of the ETT in the trachea or esophagus. The secondary outcome will assess endobronchial intubation and the duration of the ultrasound procedure. The time measurement will begin immediately after the placement of the ETT and will continue until a decision is made, via ultrasound, regarding whether the intubation is tracheal or esophageal. Receives: Diagnostic Test: Lung Ultrasound |
| Diaphragm Ultrasound | Experimental | The success of ETI will be checked by diaphragm ultrasonography. The primary outcome will be the placement of the ETT in the trachea or esophagus. The secondary outcome will assess endobronchial intubation and the duration of the ultrasound procedure. The time measurement will begin immediately after the placement of the ETT and will continue until a decision is made, via ultrasound, regarding whether the intubation is tracheal or esophageal. Receives: Diagnostic Test: Diaphragm Ultrasound |
What is being measured
The primary outcome is the main question the study is designed to answer.
Correct Classification of Endotracheal Tube Position
The primary outcome was correct classification of endotracheal tube position, tracheal or esophageal, by the assigned ultrasound technique. Classification was considered correct when the ultrasound finding agreed with the reference standard assessment performed by the treating physician using quantitative end tidal carbon dioxide monitoring together with bilateral chest auscultation.
Measured: Immediately after intubation, assessed within the first 5 minutes after the procedure.
Secondary outcomes (2)
Endotracheal Intubation Confirmation Time
The duration of each method used to confirm endotracheal intubation (ultrasonography, physical examination, and end-tidal carbon dioxide) will be recorded separately. The timing will start from the placement of the endotracheal tube and connection to the bag-valve mask, and will end once a determination-successful (tracheal intubation) or unsuccessful (esophageal intubation)-is made using the respective method. If the primary physician determines esophageal intubation, the remaining uncompleted methods will be discontinued to avoid disrupting the patient's routine management or causing harm. If the ultrasonography procedure is not completed, it will be considered unsuccessful.
The timing will begin after the completion of intubation and connection to the bag-valve mask, and will continue until a decision is made. The total duration will be recorded.
Measured: Immediately after intubation, assessed within the first 5 minutes after the procedure.
Sonographer Confidence
After completing the procedure, the sonographer will rate their experience of confirming endotracheal tube position using ultrasound and their confidence in their interpretation on a 5-point Likert scale, ranging from 1 (not at all confident) to 5 (very confident).
Measured: Immediately after ultrasound, assessed within the first 5 minutes after the procedure.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Oct 2024
- Study start1 Jun 2024
- Primary completion19 Jun 2025
- Study completion19 Jun 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- 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.
- 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
- Care provider, Investigator
- Enrolment
- 200 participants (actual)
Sponsor and investigators
- Lead sponsor
- Marmara University Pendik Training and Research Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Emre Kudu, Marmara University Pendik Training and Research Hospital
- Investigators
- Emre Kudu, MD, Study director, Marmara University Pendik Training and Research Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06656546
- Sponsor's protocol ID
- 09.2024.629
- Status last verified
- May 2026
- First submitted
- 22 Oct 2024
- Last updated
- 27 May 2026
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Kudu E, Korgan MB, Altun M, Yakin F, Karacabey S, Sanri E, Akoglu H, Denizbasi A. Comparison of three point-of-care ultrasound techniques to confirm endotracheal tube placement: A randomized clinical trial. Am J Emerg Med. 2026 Aug;106:55-61. doi: 10.1016/j.ajem.2026.04.039. Epub 2026 Apr 26.
PubMed 42066651
Study at a glance
From the registry record, last updated by the sponsor on 27 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Three Point-of-care Ultrasound Techniques to Confirm Endotracheal Tube Placement: a Randomized Clinical Trial
- ClinicalTrials.gov ID
- NCT06656546
- Acronym / sponsor ID
- 09.2024.629
- Conditions
- Intubation; Difficult or Failed
- Keywords
- Ultrasonography, Rapid sequence intubation, End-tidal carbondioxide, Endotracheal intubation, point-of-care ultrasound, transtracheal ultrasound, lung ultrasound, diaphragm ultrasound
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 200 participants (actual)
- Lead sponsor
- Marmara University Pendik Training and Research HospitalUniversity, hospital or other
- Study start
- 1 Jun 2024 (actual)
- Primary completion
- 19 Jun 2025 (actual)
- Study completion
- 19 Jun 2025 (actual)
- First posted
- 24 Oct 2024 (actual)
- Results
- Posted 12 May 2026
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study is a single-center, randomized clinical trial conducted in an emergency department on intubated patients with rapid sequence intubation. Two sonographers will independently verify the accuracy of the intubation site using the assigned intubation method (tracheal, lung-sliding, or diaphragm) according to the randomization sequence. Each sonographer will be blinded to the other verification methods (physical examination, end-tidal carbon dioxide) being used. The study's primary objective is to compare the diagnostic accuracy of different intubation techniques.
Detailed description
In emergency medicine, endotracheal intubation (ETI) is commonly performed for patients who require airway management due to acute respiratory failure, inadequate oxygenation or ventilation, or an inability to protect the airway resulting from altered consciousness. When ETI is performed outside of a cardiac arrest scenario, a series of steps are followed to optimize the procedure. These steps aim to prevent hypoxia, maintain hemodynamic stability, reduce the risk of aspiration, and increase the success rate of ETI. This methodical approach is known as Rapid Sequence Intubation (RSI). RSI involves preparing the necessary and auxiliary equipment, administering premedication, ensuring oxygenation, and applying anesthetic and neuromuscular blocking agents, followed by the placement of the endotracheal tube (ETT). The procedure concludes with confirming the ETT's placement and providing post-intubation care.
The primary goal of ETI is to position the ETT through the vocal cords into the trachea, ensuring that both lungs are ventilated effectively. Incorrect or unrecognized endobronchial intubation can result in hypoventilation and collapse of the non-ventilated lung, while the over-ventilated lung may suffer barotrauma or pneumothorax. Unrecognized esophageal intubation, on the other hand, can lead to failure in ventilation, resulting in hypoxia and subsequent complications, including brain damage and other morbidities. Therefore, ensuring the correct placement of the ETT is crucial to avoid serious adverse outcomes.
Various methods have been described to confirm correct ETT placement, including direct visualization during intubation, observation of chest wall movements, bilateral auscultation of lung sounds, end-tidal carbon dioxide (EtCO2) monitoring, fiberoptic bronchoscopy, and chest X-ray. Among these, capnography is considered the gold standard. However, in specific clinical situations, EtCO2 monitoring may be unreliable. Patients in cardiac arrest, patients with severe hypotension, pulmonary embolism, or poor pulmonary reserve may present lower than expected EtCO2 values. Similarly, gastric insufflation, using antacids, or consuming carbonated beverages may result in false-positive readings.
The American College of Emergency Physicians (ACEP) guidelines recommend the use of additional confirmation methods after ETT placement. Ultrasound (US) has emerged as a relatively new technique for confirming ETI. Its advantages include being non-invasive, portable, rapid, and capable of providing real-time, accurate results. Additionally, the US is unaffected by environmental noise, which can be challenging in noisy environments such as the emergency department. It is also not influenced by changes in pulmonary blood flow.
Several ultrasound techniques have been described to confirm ETT placement. The most commonly used methods include direct visualization of the ETT during intubation (tracheal ultrasound), detection of the "lung sliding" sign via lung ultrasound to indicate lung aeration and bilateral identification of diaphragmatic movement. Tracheal ultrasound can detect esophageal intubation before ventilation begins, preventing unnecessary gastric insufflation and its associated complications. The lung sliding sign and bilateral diaphragmatic movement techniques can help identify endobronchial intubation by visualizing pleural and diaphragmatic movement, respectively, thereby complementing tracheal ultrasound and reducing the risk of missed endobronchial intubation.
A comprehensive literature review revealed that no studies have directly compared these three ultrasound methods. Therefore, this study aims to evaluate the effectiveness of these three ultrasound techniques in confirming ETT placement and to compare the time required for each method. A secondary objective is to compare the time spent using ultrasound with that of auscultation and capnography. Additionally, this study will assess the ability of each ultrasound technique to detect tracheal intubation and, if present, accidental esophageal intubation across all patients.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (care provider, investigator)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Tracheal Ultrasound | Experimental | Diagnostic Test: Tracheal UltrasoundThe success of endotracheal intubation (ETI) will be checked by tracheal ultrasonography. The primary outcome will be the placement of the endotracheal tube (ETT) in the trachea or esophagus. The secondary outcome will assess the duration of the ultrasound procedure. The time measurement will begin immediately after the placement of the ETT and will continue until a decision is made, via ultrasound, regarding whether the intubation is tracheal or esophageal. |
| Lung Ultrasound | Experimental | Diagnostic Test: Lung UltrasoundThe success of ETI will be checked by lung ultrasonography. The primary outcome will be the placement of the ETT in the trachea or esophagus. The secondary outcome will assess endobronchial intubation and the duration of the ultrasound procedure. The time measurement will begin immediately after the placement of the ETT and will continue until a decision is made, via ultrasound, regarding whether the intubation is tracheal or esophageal. |
| Diaphragm Ultrasound | Experimental | Diagnostic Test: Diaphragm UltrasoundThe success of ETI will be checked by diaphragm ultrasonography. The primary outcome will be the placement of the ETT in the trachea or esophagus. The secondary outcome will assess endobronchial intubation and the duration of the ultrasound procedure. The time measurement will begin immediately after the placement of the ETT and will continue until a decision is made, via ultrasound, regarding whether the intubation is tracheal or esophageal. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Patients in the emergency department who require endotracheal intubation (ETI) based on the decision of the primary physician and are intubated using the rapid sequence intubation method.
- Patients aged >18 years will be included in the study.
Key exclusion criteria (5 listed)
- Pregnant patients.
- Patients with a history of neck or chest surgery that may interfere with ultrasound evaluation.
- Patients with cervical spine disease or a history of surgery that could affect diaphragmatic movement.
- Patients diagnosed conditions such as pneumothorax that could affect lung ultrasound results, or those in whom pneumothorax is detected upon further evaluation,
- Patients who, after being enrolled, withdraw consent either personally or through a relative.
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 UltrasoundIn the clinic, one of the routinely used ultrasound machines, either the HM70 EVO Linear Probe (5-12 MHz) or the eSaote MyLab Seven Linear Probe (3-13 MHz), will be selected based on suitability for the procedure at the time. A linear transducer will be placed perpendicular to the trachea at the level of the cricoid membrane. During ETI, visualization of the ETT moving within the trachea, specifically behind the cricothyroid membrane, indicates successful intubation. In contrast, if the ETT is mistakenly placed in the esophagus, a double-lumen appearance lateral to the trachea, created by the ETT within the esophagus, suggests esophageal intubation. | Diagnostic test | Tracheal Ultrasound |
| Lung UltrasoundAlso: Lung SlidingIn the clinic, one of the routinely used ultrasound machines, either the HM70 EVO Linear Probe (5-12 MHz) or the eSaote MyLab Seven Linear Probe (3-13 MHz), will be selected based on suitability for the procedure at the time. Following ETI, the presence of lung sliding will be evaluated using ultrasound with the aid of a linear probe. The transducer will be placed bilaterally along the mid-clavicular line, between the second and fifth intercostal spaces, in a coronal orientation. After the ETT is placed and ventilation is initiated, the movement of the visceral and parietal pleura will be assessed. The presence of sliding motion between these pleural layers during ventilation indicates successful intubation, whereas the absence of this movement suggests a failed intubation. | Diagnostic test | Lung Ultrasound |
| Diaphragm UltrasoundAlso: Diaphragm ExcursionIn the clinic, one of the routinely used ultrasound machines, either the HM70 EVO Curvilinear Probe (2-8 MHz) or the eSaote MyLab Seven Curvilinear Probe (1-8 MHz), will be selected based on suitability for the procedure at the time. Using a curvilinear transducer, the probe will be placed along the mid-axillary line, approximately at the seventh to ninth intercostal spaces, in a coronal orientation. The movement of the diaphragm during ventilation will be assessed over the spleen and liver. Diaphragmatic motion during ventilation indicates successful ETI, while the absence of bilateral diaphragmatic movement suggests esophageal intubation. If diaphragmatic movement is only observed on one side, it is indicative of endobronchial intubation. | Diagnostic test | Diaphragm Ultrasound |
Primary outcome
Correct Classification of Endotracheal Tube Position
Time frame: Immediately after intubation, assessed within the first 5 minutes after the procedure.
The primary outcome was correct classification of endotracheal tube position, tracheal or esophageal, by the assigned ultrasound technique. Classification was considered correct when the ultrasound finding agreed with the reference standard assessment performed by the treating physician using quantitative end tidal carbon dioxide monitoring together with bilateral chest auscultation.
2 secondary outcomes
Endotracheal Intubation Confirmation Time
Time frame: Immediately after intubation, assessed within the first 5 minutes after the procedure.
Sonographer Confidence
Time frame: Immediately after ultrasound, assessed within the first 5 minutes after the procedure.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 May 2026.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 42066651Kudu E, Korgan MB, Altun M, Yakin F, Karacabey S, Sanri E, Akoglu H, Denizbasi A. Comparison of three point-of-care ultrasound techniques to confirm endotracheal tube placement: A randomized clinical trial. Am J Emerg Med. 2026 Aug;106:55-61. doi: 10.1016/j.ajem.2026.04.039. Epub 2026 Apr 26.
- Individual participant dataSharing planned: No
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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.
Emre Kudu, MD study director
Marmara University Pendik Training and Research Hospital
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 Ultrasound, Lung Ultrasound and Diaphragm Ultrasound in people with Intubation; Difficult or Failed, run by Marmara University Pendik Training and Research Hospital 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 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 27 May 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 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?
Yes. Results are posted in the registry (first posted 12 May 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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?
Correct Classification of Endotracheal Tube Position (time frame: Immediately after intubation, assessed within the first 5 minutes after 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 NCT06656546, 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 27 May 2026; AzTrials last refreshed its copy on 8 Nov 2026.