None
Conditions
Interventions
The turning-right head position:From the neutral position, we turn the head 50 degrees to the right for the first participant (normally, the angle of head rotation to the right can be 60 °~80 °). The
After successful intubation for K times (K=6 for ED90 calculation), the head position angle was raised to the higher level. Perform sequential testing in this way until the given number of sample case
The backward/forward rotation head postion:From a neutral position, we bend the head forward by 5 degrees for the first participant (normally, both the ranges of head forward flexion and backward exte
After k successful intubation attempts (K=6 for ED90 calculation), the head position will move forward by 5 degree. Perform sequential testing in this way until the given number of sample cases is com
Sponsors
Huashan Hospital, Fudan University
Eligibility
Sex/Gender
All
Age
18 Years to 65 Years
Inclusion criteria
Inclusion criteria: 1. Selective neurosurgical craniotomy under general anesthesia with endotracheal intubation. 2. Age >= 18 years old, <= 65 years old, male or female not limited. 3. ASA classification 1-2. 4. BMI less than 30 kg/m^2. 5. Research participants sign informed consent forms.
Exclusion criteria
Exclusion criteria: 1. Possible difficult airway by a quick assessment of three indicators: Mallampati classification IIl- IV, interincisal distance < 2 finger widths, and thyromental distance < 6 cm. 2. Conditions potentially affecting intubation, including but not limited to loosening of teeth,micrognathia, prominent incisors, or large neck circumference. 3. Obstructive Sleep Apnea Syndrome (OSAS). 4. Growth hormone-secreting pituitary adenoma or acromegaly. 5. History of head/neck injury. 6. Abnormal cervical mobility or inability to rotate or flex the head to the pre-set angle. 7. Not willing to participate at any time before anesthesia induction.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| successful intubation; | — |
Secondary
| Measure | Time frame |
|---|---|
| Cormack-Lehane Grading ; | — |
Countries
China
Contacts
Public ContactXu Ming
Huashan Hospital, Fudan University
Outcome results
None listed