Anesthesia
Conditions
Keywords
videolaryngoscope, tracheal intubation, Cormack-Lehane grade, airway evaluation, sedation, anesthesia
Brief summary
Difficult tracheal intubation is a cause of severe patient damage and death. There is not a good method to predict it. The McGrath Series 5 video laryngoscope can improve visualization of the glottic structures one to two grades. Moreover unlike a classical laryngoscope with a Macintosh blade, the McGrath provides a view of the glottis without requiring alignment of the oral, pharyngeal and laryngeal axes. In this study, the investigators will use it to compare the Cormack-Lehane score in sedation and anesthesia condition. It helps to know the role of videolaryngoscope in predicting difficult intubation.
Detailed description
* The enrolled patients were given a bolus of sufentanil 0.3-0.5μg/kg to achieve Ramsay sedation score 2-3. The Cormack-Lehane score in sedation was evaluated by McGrath videolaryngoscope. * Then the patients were induced with propofol. A bolus of rocuronium was given to facilitate intubation. The Cormack-Lehane score in anesthesia was recorded when intubated by McGrath videolaryngoscope. * BMI, mouth opening, thyromental distance, intubation duration and ramsay sedation score were also recorded. * To compare the Cormack-Lehane score in sedate and anesthesia condition
Interventions
A kind of portable videolaryngoscopes, produced by Aircraft Medical. It has been used for difficult airway.
Sponsors
Huazhong University of Science and Technology
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
15 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* patients scheduled for general surgery under general anesthesia * ASA classification 1-3
Exclusion criteria
* emergent operation, aspiration risk * a history of difficult airway * expected difficult airway * incooperative patients with mental diseases, hearing disorders
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Cormack-Lehane score in sedation condition | 5 minutes after administration of sufentanil | Based on the Modified Cormack-Lehane classification. 5 degrades. 1-5 |
| Cormack-lehane score in anesthesia condition | 1 minute after administration of rocuronium | Based on the Modified Cormack-Lehane classification. 5 degrades. 1-5 |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Duration of intubation | At intubation | The duration of intubation is defined as the time from inserting videolaryngoscope, intubating a tube, to withdrawing videolaryngoscope using a stopwatch. |
| Sedation score | 5 minutes after administraion of sufentanil | by Ramsay sedation score 1-6. The higher score, the deeper sedation |
Other
| Measure | Time frame | Description |
|---|---|---|
| BMI | One day before operation | — |
| Thyromental distance | One day before operation | measuring with a ruler |
| Mallampati classification | One day before operation | 4 degrades |
| Mouth opening | One day before operation | measuring with a ruler |
Countries
China
Outcome results
None listed