Patient Positions for Locating the Cricothyroid Membrane

Not Applicable

• Conditions: Cricothyroid Membrane
• Interventions: Other: Identification of the cricothyroid membrane

• Registration Number: NCT05043025
• Lead Sponsor: SMG-SNU Boramae Medical Center

Brief Summary

Cricothyroidotomy is an emergency rescue technique to secure the airway in a 'Can't intubate, Can't Oxygenate' (CICO) situation. The cricothyroid membrane (CTM) is the target site of cricothyroidotomy, and accurate identification of the CTM is essential for successful cricothyroidotomy. In this study, the investigators compare patient positions (neck extension vs. modified ramped position) in terms of the success rate for identifying the CTM in obese patients.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2021-08-31
• Status Verified: 2021-09
• Study First Submitted QC: 2021-09-08
• Last Update Submitted: 2021-09-08
• Study First Posted: 2021-09-13
• Last Update Posted: 2021-09-13
• Study Start: 2021-10-01
• Primary Completion: 2022-06-30
• Study Completion: 2022-06-30

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: Female
• Target Recruitment: 138

Inclusion Criteria

• body mass index >30 kg/m2

Exclusion Criteria

• anatomical abnormalities or pathologies of the neck or larynx
• a history of neck surgery.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Neck extension group	Identification of the cricothyroid membrane	The cricothyroid membrane is identified in a neck extended position.
Modified ramped position group	Identification of the cricothyroid membrane	The cricothyroid membrane is identified in a modified ramped position.

Primary Outcome Measures

Name	Time	Method
Success rate for the correct identification of the cricothyroid membrane	Immediately after identifying the cricothyroid membrane using a laryngeal handshake technique	After identifying the cricothyroid membrane using a laryngeal handshake technique in different head positions, an assessor evaluates the correctness of its localization using ultrasound.

Secondary Outcome Measures

Name	Time	Method
Duration for identifying the cricothyroid membrane	At 90 seconds after administering neuromuscular blockade	Time taken to locate the cricothyroid membrane is checked.
Perceived difficulty during cricothyroid membrane identification	At 5 minutes after identifying the cricothyroid membrane using a laryngeal handshake technique	Anatomical difficulty perceived by the anesthesiologists during cricothyroid membrane identification is assessed (1, very easy; 2, easy; 3, moderate; 4, difficult; and 5, very difficult).
Distances between the center of the actual and perceived cricothyroid membrane	Immediately after identifying the cricothyroid membrane using a laryngeal handshake technique	Distances between the center of the actual and perceived cricothyroid membrane is measured using ultrasound.