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A previous study reported a shorter time to tracheal intubation by reducing percentage of glottic opening (POGO) view to &lt;50% when intubating a normal adult airway using the Glidescope TM  blade. We evaluate the efficacy of reducing POGO to &lt;50% when intubating patients with rigid cervical immobilization using CMAC TM  D blade. One hundred and four adult patients were randomized to group POGO 100% or POGO &lt;50% . Laryngoscopy was performed by advancing tip of the D blade at vallecula. POGO 100% was achieved by exerting upward force to displace epiglottis until glottic opening from the anterior commissure to inter arytenoid notch. POGO &lt; 50% was acquired by withdrawing the D blade tip dorsally from vallecula. The primary outcome was time to intubation. The median time (IQR) to successful intubation was 29 (25–35) seconds for group POGO &lt; 50% and 34 (28–40) seconds for group with POGO 100% (difference in medians, 5 seconds; 95% confidence interval, 2 to 8, p = 0.003). Complications were minor. Using the CMAC TM  D blade with a reduced POGO in patients with cervical spine immobilization resulted in faster tracheal intubation. The trial is registered at ClinicalTrial.gov (CT.gov identifier: NCT 04833166)

Partial vs full glottic view with CMAC TM D blade intubation of airway with simulated cervical spine injury: a randomized controlled trial