Glottic Visualisation During Laryngoscopy

Study Overview
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Brief Summary
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In this study, we aimed to investigate the effects of head and neck positions on the visualization of glottis and the success of intubation during videolaryngoscopy in obese patients.

Detailed Description
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Tree different head and neck positions will compare for glottic visualization and intubation success rates in obese patients (BMI> 30 kg / m2) who required endotracheal intubation for general anesthesia between 18-65 years of age.

Official Title
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The Effect of Head Position on Glottic Visualisation and Intubation Success With Videolaryngoscope in Obese Patients

Conditions
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Intubation

Intervention / Treatment
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* Device: Mcgrath Mac Videolaryngoscope


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Being 18-65 aged Being obese Undergoing surgery under general anesthesia Exclusion Criteria: Having difficult airway Being American Society of Anesthesiologist (ASA) 4 physical status Undergoing emergency surgery

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Screening
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Neutral Position<br>Head and neck will be on neutral position. | Device: Mcgrath Mac Videolaryngoscope<br>* Patient's laryngoscopy will be done using McGrath Mac video laryngoscope<br>|
| Active Comparator: Sniffing Position<br>Head and neck will be on sniffing position | Device: Mcgrath Mac Videolaryngoscope<br>* Patient's laryngoscopy will be done using McGrath Mac video laryngoscope<br>|
| Active Comparator: Head Extension position<br>Head will be on simple extension position | Device: Mcgrath Mac Videolaryngoscope<br>* Patient's laryngoscopy will be done using McGrath Mac video laryngoscope<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Glottic view | the percentage of glottic opening (POGO) and cormack-lehane scores will be used to rate of the glottic view | During laryngoscopy | 
| Intubation Success | Intubation attempt number will be recorded | During intubation | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Intubation difficulty | Intubation Difficulty Scale(IDS) score will be recorded.The IDS score is derived from seven variables. N1 represents the number of additional intubation attempts, N2 represents the number of additional operators, N3 is the number of alternative intubation techniques used; N4 represents the laryngoscopic view, N5 represents the lifting force applied during laryngoscopy, N6 represents the necessity to apply external laryngeal pressure to optimize glottic exposure, N7 represents the mobility of vocal cord. The IDS score is the sum of all variables and ranges from zero to infinity. A score of 0 indicates an easy tracheal intubation. Intubation is considered difficult if the score is greater than 5. | During Laryngoscopy | 
| Intubation time | The duration of the endotracheal tube placement will be recorded | During Intubation |