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In this study, we compare the conventional laryngeal handshake technique and modified laryngeal handshake technique for locating the cricothyroid membrane in terms of accuracy and speed. The conventional laryngeal handshake technique is performed with the non-dominant hand, identifying the hyoid bone and thyroid laminae, stabilizing the larynx between thumb and middle finger, and moving down the neck to palpate the cricothyroid membrane with the index finger.
The modified laryngeal handshake is performed with the non-dominant hand, stabilizing the trachea between thumb and middle finger from the suprasternal notch and moving up the neck to palate the cricoid cartilage and cricothyroid membrane with the index finger.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Conventional laryngeal handshake technique | Active Comparator | The conventional laryngeal handshake technique is performed to localize the cricothyroid membrane |
|
| Modified laryngeal handshake technique | Experimental | The modified laryngeal handshake is performed to localize the cricothyroid membrane |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Conventional laryngeal handshake technique | Procedure | The conventional laryngeal handshake technique is performed with the non-dominant hand, identifying the hyoid bone and thyroid laminae, stabilizing the larynx between thumb and middle finger, and moving down the neck to palpate the cricothyroid membrane with the index finger. |
| Measure | Description | Time Frame |
|---|---|---|
| The accuracy to localize the cricothyoid membrane | The accuracy of the cricothyroid membrane identified by the conventional and modified handshake techniques are evaluated. | 1 minute after identifying the cricothyroid membrane using the conventional or modified laryngeal handshake technique |
| Measure | Description | Time Frame |
|---|---|---|
| The accuracy to localize the midline of the neck | The accuracy of the midline of the neck identified by the conventional and modified handshake techniques are evaluated. | through the identification of cricothyroid membrane, an average of 5 minutes |
| The vertical and horizontal distances between the actual and perceived cricothyroid membrane |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Jin-Young Hwang, MD, PhD | SMG-SNU Boramae Medical Center | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| SMG-SNU Boramae Medical Center | Seoul | South Korea |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 34517392 | Derived | Chang JE, Kim H, Won D, Lee JM, Kim TK, Min SW, Hwang JY. Comparison of the Conventional Downward and Modified Upward Laryngeal Handshake Techniques to Identify the Cricothyroid Membrane: A Randomized, Comparative Study. Anesth Analg. 2021 Nov 1;133(5):1288-1295. doi: 10.1213/ANE.0000000000005744. |
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|
| Modified laryngeal handshake technique | Procedure | The modified laryngeal handshake is performed with the non-dominant hand, stabilizing the trachea between thumb and middle finger from the suprasternal notch and moving up the neck to palate the cricoid cartilage and cricothyroid membrane with the index finger. |
|
The vertical and horizontal distances between the actual and perceived cricothyroid membrane using the conventional and modified handshake techniques are evaluated. |
| through the identification of cricothyroid membrane, an average of 5 minutes |
| Time to localize the cricothyroid membrane | The time taken to identify the cricothyroid membrane is recorded. | through the identification of cricothyroid membrane, an average of 5 minutes |