Mcgrath Videolaryngoscope Versus Macintosh Laryngoscope in Patients With Manual In-line Stabilization

Comparison of the Mcgrath Videolaryngoscope With the Macintosh Laryngoscope for Orotracheal Intubation in Patients With Manual In-line Stabilization

Status

UNKNOWN

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT03516539

Enrollment

100

Registered

2018-05-04

Start date

2017-12-11

Completion date

2018-07-07

Last updated

2018-05-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Anesthesia, General

Keywords

Videolaryngoscopy

Brief summary

Video laryngoscopy provides easily a good laryngeal view compared to direct laryngoscopy. It is particularly, useful in patients with anticipated difficult intubation, and also widely used for educational purposes. Among video laryngoscopy, Mcgrath is a recently-developed, portable video laryngoscopy with a liquid crystal display (LCD) monitor and disposable curved blade. Mcgrath is known to provide excellent laryngeal visibility even in case of anticipated-difficult and anticipated-unsuccessful intubation as well as normal airway management. However, compared with direct laryngoscopy, the success rate of intubation and the time required for anticipated difficult intubation have been reported conflicting results in previous studies. The aim of this study was to compare the intubation success rate, the intubation time and the ease of use with Mcgrath video laryngoscopy and direct laryngoscopy during intubation.

Detailed description

1. In the operating room, all patients are monitored with an electrocardiograph, noninvasive blood pressure, pulse oximeter, capnograph and Bispectral index (BIS) monitor. After pre-oxygenation with 100% oxygen for 1 minute, intravenous anesthesia (TIVA) with propofol and remifentanyl is administrated and followed by rocuronium (0.6mg/kg). When patients are lost their consciousness, manual mask ventilation is proceeded with 100% oxygen for 2 minutes. 2. Transoral endotracheal intubation is performed using Mcgrath videolaryngoscope (Group ML) and direct laryngoscope (Group DL) using manual in-line stabilization. At this time, the time required for intubation is measure by other medical personnel not engaged in this research. 3. The anesthesiologist assesses Cormack Lehane laryngeal visual field,external laryngeal manipulation, intubation difficulty scales (IDS) and the difficulty of intubation.

Interventions

DEVICEGroup ML

Mcgrath videolaryngoscope

DEVICEGroup DL

Macintosh laryngoscope

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

DOUBLE (Subject, Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

19 Years to 70 Years

Healthy volunteers

Inclusion criteria

* Patients scheduled for general anesthesia requiring tracheal intubation. Patients are aged 19 to 70 years and are American Society of Anesthesiologists physical status I, II.

Exclusion criteria

* Patients requiring rapid sequence intubation Patients with poor teeth or high risk of aspiration pneumonia Cervical spine pathology, pharyngeal pathology

Design outcomes

Primary

Measure	Time frame	Description
Intubation success rate	1 hour	success or failure of intubation

Secondary

Measure	Time frame	Description
Time required for intubation	1 hour	time until end tidal carbon dioxide (CO2) measurement after laryngeal blade passing through patient's teeth
Intubation difficulty score	1 hour	difficulty at the time of intubation. (easy /moderate/ difficult)
Complications	1 day	oral bleeding, teeth or lip bleeding

Countries

South Korea

Contacts

Primary ContactYi Hwa Choi, Dr.

pcyhchoi@hallym.or.kr82-31-380-3813

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026