Difficult Airway
Conditions
Interventions
Gold Standard:Modified Cormack-Lehane (C-L) grade during direct laryngoscopy, assessed by a blinded anesthesiologist. Difficult airway was defined as C-L grade III/IV, >=3 intubation attempts, or use
Index test:Device: Dual-line laser angle measuring instrument.
Method: Head extension angle assessment.
The patient was placed supine without a pillow and asked to perform maximal head extension (shou
Grade 2: line between philtrum and lower lip border
Grade 3: line above philtrum. Grades 2 and 3 = positive (predict difficult airway).
Sponsors
The First Affiliated Hospital of Wannan Medical College
Eligibility
Sex/Gender
All
Age
18 Years to 90 Years
Inclusion criteria
Inclusion criteria: 1. Age >= 18 years; 2. American Society of Anesthesiologists (ASA) physical status classification I-III; 3. Scheduled for elective surgery requiring endotracheal intubation under general anesthesia.
Exclusion criteria
Exclusion criteria: 1. History of previous facial or cervical spine surgery; 2. Facial or neck trauma or anatomical abnormalities that may interfere with the assessment of anatomical landmarks; 3. Inability to cooperate with the head extension maneuver; 4. Refusal to sign the informed consent form.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Angle of Head Elevation;Sensitivity;Specificity;AUC; | — |
Secondary
| Measure | Time frame |
|---|---|
| Fleiss‘ Kappa; | — |
Countries
China
Contacts
Public ContactYao Weidong
The First Affiliated Hospital of Wannan Medical College
Outcome results
None listed