The Effect of McGrath Video Laryngoscope on the Glottic View at Thyroid Surgery Position

The Effect of McGrath Video Laryngoscope on the Glottic View at Thyroid Surgery Position in Tracheal Intubation

For thyroid surgery, the special body position (thyroid surgical position) to exposure the patient's neck should be needed. For intraoperative neuromonitoring (IONM) in thyroid surgery, the tube should be placed at a specific position. A video laryngoscope can have advantages in tracheal intubation on thyroid surgical position for thyroid surgery. The purpose of the study is to investigate the effect of McGrath video laryngoscope on the glottic view when tracheal intubation is performed at the thyroid surgical position.

Study Overview

• Status: Completed
• Conditions: Thyroid Surgery
• Intervention / Treatment: Device: video laryngoscope at thyroid surgical position

Detailed Description

For thyroid surgery, the special body position (thyroid surgical position) to exposure the patient's neck should be needed. Meanwhile, the tracheal tube can be moved in the trachea from the supine position to thyroid surgical position if tracheal intubation is performed at the supine position. For intraoperative neuromonitoring (IONM) in thyroid surgery, the electrode of the tracheal tube must be placed at a specific position, that is between the vocal cords. To perform initially tracheal intubation on the thyroid surgical position, therefore, can have advantage in terms of stability of tube position in the trachea without displacement by body position change. However, tracheal intubation on thyroid surgical position might be hard in terms of obtaining a good glottic view. It is well known that video laryngoscopes can improve the glottic view. Therefore, a video laryngoscope can have advantages in tracheal intubation on thyroid surgical position for thyroid surgery in obtaining the good glottic view as well as minimal displacement of the tracheal tube because there is no need to change the patient's position. The purpose of the study is to investigate the effect of McGrath video laryngoscope on the glottic view when tracheal intubation is performed at the thyroid surgical position.

• Study Type: Interventional
• Enrollment (Actual): 39
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Korea, Republic of
  • Seoul, Korea, Republic of, 07061
    • Seoul Metropolitan Government Seoul National University Boramae Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 19 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• patients schedule to thyroid surgery

Exclusion Criteria:

• disagree to participate
• patients with weak teeth

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: video laryngoscope at thyroid surgical position; After induction of anesthesia and muscle relaxation, the patient will be positioned with a standard pillow to exposure neck for thyroid surgery (thyroid surgical position). Then, tracheal intubation will be performed with a McGrath video laryngoscope. During laryngoscopy with the McGrath video laryngoscope, the intubation practitioner will record the modified Cormack-Lehane grade and the percentage of glottic opening (POGO) score when it is assumed that a direct laryngoscope is used and when using the video laryngoscope, respectively. Next, the intubation practitioner will perform tracheal intubation with it.

Device: video laryngoscope at thyroid surgical position; After induction of anesthesia and muscle relaxation, the patient will be positioned with a standard pillow to exposure neck for thyroid surgery (thyroid surgical position). Then, tracheal intubation will be performed with a McGrath video laryngoscope. During laryngoscopy with the McGrath video laryngoscope, the intubation practitioner will record the modified Cormack-Lehane grade and the percentage of glottic opening (POGO) score when it is assumed that a direct laryngoscope is used and when using the video laryngoscope, respectively.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
direct modified Cormack-Lehane grade without external manipulation	During laryngoscopy, the modified Cormack-Lehane grade without external manipulation as if the laryngoscope is assumed as a direct laryngoscope	at tracheal intubation
direct percentage of glottic opening score (POGO score: 0 - 100, 100 means full visualization of vocal cords) without external manipulation	During laryngoscopy, the percentage of glottic opening score (POGO score: 0 - 100, 100 means full visualization of vocal cords) without external manipulation as if the laryngoscope is assumed as a direct laryngoscope	at tracheal intubation
video modified Cormack-Lehane grade without external manipulation	During laryngoscopy, the modified Cormack-Lehane grade without external manipulation as if the laryngoscope is used as a video laryngoscope	at tracheal intubation
video percentage of glottic opening score (POGO score: 0 - 100, 100 means full visualization of vocal cords) without external manipulation	During laryngoscopy, the percentage of glottic opening score (POGO score: 0 - 100, 100 means full visualization of vocal cords) without external manipulation as if the laryngoscope is used as a video laryngoscope	at tracheal intubation
direct modified Cormack-Lehane grade with external manipulation	During laryngoscopy, the modified Cormack-Lehane grade with external manipulation as if the laryngoscope is assumed as a direct laryngoscope	at tracheal intubation
direct percentage of glottic opening score (POGO score: 0 - 100, 100 means full visualization of vocal cords) with external manipulation	During laryngoscopy, the percentage of glottic opening score (POGO score: 0 - 100, 100 means full visualization of vocal cords) with external manipulation as if the laryngoscope is assumed as a direct laryngoscope	at tracheal intubation
video modified Cormack-Lehane grade with external manipulation	During laryngoscopy, the modified Cormack-Lehane grade with external manipulation as if the laryngoscope is used as a video laryngoscope	at tracheal intubation
video percentage of glottic opening score (POGO score: 0 - 100, 100 means full visualization of vocal cords) with external manipulation	During laryngoscopy, the percentage of glottic opening score (POGO score: 0 - 100, 100 means full visualization of vocal cords) with external manipulation as if the laryngoscope is used as a video laryngoscope	at tracheal intubation

Collaborators and Investigators

• Sponsor: Seoul National University Hospital
• Collaborators: SMG-SNU Boramae Medical Center
• Investigators: Principal Investigator: Jung-Man Lee, MD.PhD, SMG-SNU Boramae Medical Center

Study record dates

Study Major Dates

• Study Start (Actual): March 25, 2022
• Primary Completion (Actual): May 23, 2022
• Study Completion (Actual): May 31, 2022

Study Registration Dates

• First Submitted: February 11, 2022
• First Submitted That Met QC Criteria: February 11, 2022
• First Posted (Actual): February 22, 2022

Study Record Updates

• Last Update Posted (Actual): March 30, 2023
• Last Update Submitted That Met QC Criteria: March 29, 2023
• Last Verified: March 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Endocrine System Diseases; Thyroid Diseases
• Other Study ID Numbers: 20-2022-3

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No