A novel technique of handling the blade for videolaryngoscopy intubation in patients with a semi-rigid neck collar: a prospective randomized controlled trial – PubMed

Our findings demonstrated a superior glottic view and more favorable intubation environments when the blade tip was placed under the epiglottis than when using the conventional Macintosh technique in cervical spine immobilized patients.
— Read on pubmed.ncbi.nlm.nih.gov/36912005/