Comparison of Ultrasonographic and Anthropometric Measurements in Difficult Airway Evaluation

Study Overview
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Brief Summary
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In this study, anthropometric measurements (clinical measurements) will be applied in all patient groups; expected (to be difficult to provide airway patency as a result of detailed history, physical examination and evaluation tests performed by an experienced anesthesiologist), and unexpected (although it was not predicted that a difficulty was encountered). And ultrasounographic measurements will be applied in all patients. The aim of this study is to evaluate the predictive accuracy of ultrasonographic measurements.

Detailed Description
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In the preoperative period, the following clinical tests will be performed before the patient arrives in the operating room and when the patient arrives, the measurements will be made by ultrasonography. Mallampati classification Determination of mouth opening (interinsizer distance) Thyromental distance Sternomental distance Preoperative evaluation of the patients and clinical results of the airway tests (mentioned above) will be recorded. The cervical soft tissue thickness will be measured and recorded at 3 levels (thyrohyoid membrane, vocal cord, hyoid bone) with the help of ultrasonography (mentioned above). In addition, since all patients will be under general anesthesia, laryngoscopic images (laryngoscopic evaluation according to Cormack Lehane classification) routinely recorded on the anesthesia follow-up sheet will be recorded.

Official Title
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Evaluation of Ultrasounographic Measurements and Anthropometric Measurements as Predictors of Difficult Direct Laryngoscopy

Conditions
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Difficult Airway Intubation

Intervention / Treatment
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* Device: ultrasounography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patients under general anesthesia ASA 1-2-3 Exclusion Criteria: Patients who will undergo emergency surgery, pregnant women, children, patients who may have difficulty in airway management due to cervical instability, patients with trauma or malignancy in the neck region

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 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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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| group 1<br>difficult intubation according to antropometric measurements | Device: ultrasounography<br>* in preoperative period, airway ultrasounagraphy for all patients will be made<br>|
| group 2<br>not difficult intubation according to antropometric measurements | Device: ultrasounography<br>* in preoperative period, airway ultrasounagraphy for all patients will be made<br>|
| group 3<br>difficult intubation according to ultrasound measurements | Device: ultrasounography<br>* in preoperative period, airway ultrasounagraphy for all patients will be made<br>|
| group 4<br>not difficult intubation according to ultrasound measurements | Device: ultrasounography<br>* in preoperative period, airway ultrasounagraphy for all patients will be made<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cormack Lehane classification | Laryngoscopic evaluation according to Cormack Lehane classification | during the intubation period | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| ultrasonographic measurement | Preoperative ultrasonographic measurement will be made | 15 min before the operation |