Palpation Versus Ultrasonography for Identifying the Cricothyroid Membrane in Case of a Laterally Deviated Larynx

Study Overview
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Brief Summary
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test persons, anaesthesiologists will identify the cricothyroid membrane on a silicone model of the neck with either palpation or ultrasonography. The larynx-model is deviated to one of the sides to simulate a patient with neck pathology

Detailed Description
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test persons, anaesthesiologists will identify the cricothyroid membrane on a silicone model of the neck with either palpation or ultrasonography. The larynx-model is deviated to one of the sides to simulate a patient with neck pathology. The test persons are randomised to use other palpation or ultrasonography. Al attempts are video-taped

Official Title
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Palpation Versus Ultrasonography for Identifying the Cricothyroid Membrane in Case of a Laterally Deviated Larynx

Conditions
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Airway Management

Intervention / Treatment
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* Diagnostic Test: identification of the cricothyroid membrane using Palpation
* Diagnostic Test: Identification of the cricothyroid membrane using ultrasonography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Participants in a course of airway management Exclusion Criteria: unwillingness to participate -

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: randomised to either palpation or ultrasonography The participants are thus arandomised to use either palpation or to use ultrasonography to DIAGNOSE the position of the cricothyroid membrane
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: palpation<br>digital palpation used to identify the cricothyroid membrane | Diagnostic Test: identification of the cricothyroid membrane using Palpation<br>* identification of the cricothyroid using PALPATION, a procedure used to prepare for front of neck airway access<br>|
| Experimental: ultrasonography<br>Ultrasonography used to identify the cricothyroid membrane | Diagnostic Test: Identification of the cricothyroid membrane using ultrasonography<br>* identification of the cricothyroid membrane, using ULTRASONOGRAPHY, a procedure used to prepare for front of neck airway access<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Correct identification of the cricothyroid membrane within a minute | The fraction of identifications of the location of the cricothyroid membrane made by the participants, that is actually correct. ie the succesrate of correct identification. | 1 minute | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Time taken to identification of the estimated location of the cricothyroid membrane. | The time elapsing from the participants initiate their attempt at identificating the cricothyroid membrane until they have finished their attempt at identifying the cricothyroid membrane. | up to 3 minutes |