Sniffing Position vs Left Head Rotation (LeHeR) Maneuver for Glottic View During Direct Laryngoscopy
Trial · NCT07902986
Registered outcomes11
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
1 to 11 of 11
Download this page as JSON| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Modified Cormack-Lehane Grade in the Sniffing Position Versus the LeHeR Position | During direct laryngoscopy, approximately 3-10 minutes after induction of general anesthesia | Glottic view obtained during direct laryngoscopy with a Macintosh blade, graded using the modified Cormack-Lehane classification (1, 2A, 2B, 3A, 3B, 4; higher grades indicate a worse view). Each patient is assessed first in the sniffing position and then after 45° left head rotation (LeHeR), and the paired grades are compared within the same patient. |
| Primary | Percentage of Glottic Opening (POGO) Score in the Sniffing Position Versus the LeHeR Position | During direct laryngoscopy, approximately 3-10 minutes after induction of general anesthesia | Percentage (0-100%) of the glottic opening visible from the anterior commissure to the interarytenoid notch during direct laryngoscopy; higher values indicate a better view. Each patient is assessed first in the sniffing position and then after 45° left head rotation (LeHeR), and the paired scores are compared within the same patient. |
| Secondary | Intubation Difficulty Scale (IDS) Score | During endotracheal intubation, from first laryngoscopy until confirmed tracheal intubation | IDS score calculated as the sum of seven parameters (N1-N7): number of additional attempts, number of additional operators, number of alternative techniques, Cormack-Lehane grade minus 1 in the position in which intubation is achieved, increased lifting force (0/1), need for external laryngeal pressure (0/1), and vocal cord position (abducted 0 / adducted 1). Score 0 = easy intubation, 1-5 = slight difficulty, \>5 = moderate to major difficulty. |
| Secondary | Ease of Intubation | During endotracheal intubation, from first laryngoscopy until confirmed tracheal intubation | Ease of intubation categorized as: easy (successful at first attempt without additional maneuvers), moderate (successful at first attempt with additional maneuvers such as external laryngeal manipulation or stylet/bougie, or at second attempt), difficult (more than two attempts, a different operator or a different technique required, but ultimately successful), or impossible (fiberoptic/awake intubation required or failed intubation). |
| Secondary | Number of Participants Requiring Additional Airway Maneuvers | During endotracheal intubation, from first laryngoscopy until confirmed tracheal intubation | Number of participants requiring BURP (backward-upward-rightward pressure), external laryngeal manipulation, or return of the head to the sniffing position to achieve intubation after the LeHeR maneuver. |
| Secondary | Number of Participants Requiring a Bougie or Stylet | During endotracheal intubation, from first laryngoscopy until confirmed tracheal intubation | Number of participants in whom a gum elastic bougie or stylet is required to achieve endotracheal intubation. |
| Secondary | Intubation Time | During endotracheal intubation, from first laryngoscopy until confirmed tracheal intubation | Time in seconds from passage of the laryngoscope blade between the lips to the appearance of the first end-tidal carbon dioxide waveform on capnography. |
| Secondary | Number of Participants With Airway Trauma | From first laryngoscopy until 5 minutes after intubation | Number of participants with signs of airway trauma, defined as blood on the laryngoscope blade or endotracheal tube, or lip, dental or oropharyngeal mucosal injury. |
| Secondary | Heart Rate | Baseline (before induction), after induction, and at 1, 3, 5 and 10 minutes after intubation | Heart rate (beats/min) recorded at predefined time points to assess hemodynamic and oxygenation changes associated with laryngoscopy and intubation. |
| Secondary | Mean Arterial Pressure | Baseline (before induction), after induction, and at 1, 3, 5 and 10 minutes after intubation | Mean arterial pressure (mmHg) recorded at predefined time points to assess hemodynamic and oxygenation changes associated with laryngoscopy and intubation. |
| Secondary | Peripheral Oxygen Saturation | Baseline (before induction), after induction, and at 1, 3, 5 and 10 minutes after intubation | Peripheral oxygen saturation (SpO2, %) recorded at predefined time points to assess hemodynamic and oxygenation changes associated with laryngoscopy and intubation. |
Source ClinicalTrials.govtrials-2026-11-12-0.5.0
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
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