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Fig. 3 | BMC Anesthesiology

Fig. 3

From: A rare case of difficult airway management in a Klippel-Feil syndrome pediatric patient with osseous torticollis undergone orthopedic surgery

Fig. 3

It is hard to make an accurate measurement of O-C4 angle as this patient had complex cervical abnormalities (congenital occipitoatlantal fusion, congenital basilar invagination, atlanto-axial joint dislocation, KFS at C2-3, and the subsequent fixation of O-C4). We made a rough estimation of the O-C4 angle (the angel between the long and short red lines) from lateral X radiography of preoperative (a) and postoperative (b) (2 months after surgery) in neutral position. A slight reflection of the O-C4 was noticed when compared with preoperative imaging (O, occiput; C, cervical vertebrae)

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BMC Anesthesiology

ISSN: 1471-2253

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