McGRATH MAC Video Laryngoscope

The University of Texas System (UT)

Status: Completed

Conditions: Intubation; Difficult

Treatments: Device: McGrath MAC enhanced direct laryngoscope

Study type: Interventional

Funder types: Other; Industry

Identifiers

NCT02250521

HSC-MS-14-0365

Details and patient eligibility

About

This study was designed to determine the first attempt success rate of tracheal intubation with the McGRATH™ MAC laryngoscope using direct visualization in patients with known difficult airways, as well as exploring the possibility of identifying a particular direct Cormack-Lehane (C-L) grade view where indirect (video) visualization can be most beneficial during laryngoscopy and intubation.

Enrollment: 100 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• BMI < 50 kg/m2
• Two or more of the following inclusion criteria: Mallampati class: III-IV; Reduced mouth opening < 4 cm; Neck circumference > 40 cm for females and > 43 cm for males; Thyromental distance < 6 cm; Ratio of the patient's height to thyromental distance ≥ 23.5; Sternomental distance < 12 cm

Exclusion criteria

• BMI ≥ 50 kg/m2
• emergency status
• cervical injury or pathology
• neck irradiation
• known difficult airway
• risk of gastric aspiration
• hemodynamic instability
• requiring rapid sequence intubation

Trial design

Primary purpose: Supportive Care

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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100 participants in 1 patient group

McGrath Mac intubations

Experimental group

Description:

All 100 patients will be intubated using the McGRATH® MAC video laryngoscope, either through direct or indirect vision laryngoscopy. The liquid crystal display (LCD) monitor of the McGRATH™ MAC was initially covered; if the anesthesiologist visualized a modified C-L grade 1-3 view, the patient was intubated utilizing this direct view. If the anesthesiologist observed a modified C-L grade 4 view during their initial direct view, the patient was intubated using the indirect method. If intubation via direct laryngoscopy was unsuccessful on the first attempt, the patient was intubated using the indirect view. If both methods of laryngoscopy were unsuccessful, the rescue intubation technique was performed at the discretion of the anesthesiologist.

Treatment:

Device: McGrath MAC enhanced direct laryngoscope