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Fig. 2 | BMC Anesthesiology

Fig. 2

From: Direct versus indirect epiglottis elevation in cervical spine movement during videolaryngoscopic intubation under manual in-line stabilization: a randomized controlled trial

Fig. 2

Reference lines of the occiput (a), C1 (b), C2 (c) and C5 (d). a: the line connecting the sellar base and the opisthion. b: the line connecting the inferior cortical margin of C1 anterior arch and that of the C1 spinous process. c: the line connecting anteroinferior cortical margin of the C2 body and the inferior cortical margin of the C2 spinous process. d: the line parallel to the superior endplate of the C5 body

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