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Fig. 3 | BMC Anesthesiology

Fig. 3

From: No radiographic index predicts difficult intubation using the Optiscope™ in cervical spine surgery patients: a retrospective study

Fig. 3

Measurements of radiographic indices investigated in this study. Radiographic indices were measured on cervical spine lateral X-ray (a and b) and magnetic resonance imaging (c and d) images in neutral neck position. I. incisor; C1, atlas; C5, the 5th cervical spine; MHD, mandibulohyoid distance; C1C5D, atlanto-the 5th cervical vertebral distance; C1OD, atlanto-occipital distance; HCD, hyoidocervical distance; C1C2D, atlanto-axial distance; SVD, skin-vallecular distance; SED, skin-epiglottic distance; SGD, skin-glottic distance; TL, tongue length; TH, tongue height; TA: tongue area; EL, epiglottis length; EPD, epiglottic-pharyngeal distance, EA, epiglottis angle

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BMC Anesthesiology

ISSN: 1471-2253

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