Intubation
Conditions
Brief summary
The McGrath videolaryngoscope (VL) provides excellent laryngoscopic views, but directing an endotracheal tube is not easy, so routine using of stylet is recommended. The goal of this study is to determine the appropriate angle of stylet by comparing time to intubation (TTI).
Interventions
DEVICEintubate with 60° angled stylet
Sponsors
Ajou University School of Medicine
Study design
Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
19 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
* an American Society of Anesthesiologists physical status (ASA) 1 or 2
Exclusion criteria
* a suspected difficult airway (Mallampati score Ⅳ) * known cervical spine injury * required rapid sequence induction * emergency operation
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Time to Intubation | 10 minutes around intubation |
Participant flow
Recruitment details
This study enrolled patients scheduled for elective surgery requiring orotracheal intubation in our hospital. The last patient completed in August 2016.
Participants by arm
| Arm | Count |
|---|---|
| 60° Angle Group intubate using McGrath Videolaryngoscope with 60° angled stylet
intubate with 60° angled stylet | 70 |
| 90°Angle Group intubate using McGrath Videolaryngoscope with 90° angled stylet
intubate with 60° angled stylet | 70 |
| Total | 140 |
Baseline characteristics
| Characteristic | 90°Angle Group | Total | 60° Angle Group |
|---|---|---|---|
| Age, Continuous | 41 years STANDARD_DEVIATION 14 | 41 years STANDARD_DEVIATION 14 | 41 years STANDARD_DEVIATION 14 |
| Mallampati score Mallampati score 1 | 41 Participants | 82 Participants | 41 Participants |
| Mallampati score Mallampati score 2 | 20 Participants | 42 Participants | 22 Participants |
| Mallampati score Mallampati score 3 | 9 Participants | 16 Participants | 7 Participants |
| Mouth opening | 5.2 cm STANDARD_DEVIATION 0.9 | 5.3 cm STANDARD_DEVIATION 1 | 5.4 cm STANDARD_DEVIATION 1.1 |
| range of motion of cervical spine fixed | 0 Participants | 0 Participants | 0 Participants |
| range of motion of cervical spine normal | 70 Participants | 139 Participants | 69 Participants |
| range of motion of cervical spine reduced | 0 Participants | 1 Participants | 1 Participants |
| Sex: Female, Male Female | 13 Participants | 29 Participants | 16 Participants |
| Sex: Female, Male Male | 57 Participants | 111 Participants | 54 Participants |
| Thyromental distance | 9.2 cm STANDARD_DEVIATION 1.4 | 9.2 cm STANDARD_DEVIATION 1.3 | 9.2 cm STANDARD_DEVIATION 1.3 |
| upper incisors status absent | 0 Participants | 1 Participants | 1 Participants |
| upper incisors status fixed | 0 Participants | 1 Participants | 1 Participants |
| upper incisors status normal | 70 Participants | 138 Participants | 68 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk |
|---|---|---|
| deaths Total, all-cause mortality | — / — | — / — |
| other Total, other adverse events | 0 / 70 | 0 / 70 |
| serious Total, serious adverse events | 0 / 70 | 0 / 70 |
Outcome results
Primary
Time to Intubation
Time frame: 10 minutes around intubation
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| 90°Angle Group | Time to Intubation | 32.5 seconds | Standard Deviation 9.4 |
| 60° Angle Group | Time to Intubation | 29.3 seconds | Standard Deviation 6.4 |