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Fig. 2 | BMC Anesthesiology

Fig. 2

From: Preoperative X-ray C2C6AR is applicable for prediction of difficult laryngoscopy in patients with cervical spondylosis

Fig. 2

Lateral cervical X-ray film in the extension positions. HMDe, the distance between the hyoid bone and the tip of the chin in the extension position; C0C1De, the distance between the occipital bone and first cervical vertebra in the extension position; C1C2De, the distance between the first cervical vertebra and the second cervical vertebra in the extension position

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BMC Anesthesiology

ISSN: 1471-2253

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