3Okazaki T, Kanaya N, Niiyama Y, et al. The incidence of unanticipated difficult intubation in 6742 general surgical patients[J]. Anesth ,1999, 91:A1180-1184.
4El-Ganzouri AR, McCarthy R J, Tuman KJ, et al. Preoperative airway assessment: predictive value of a multivariate risk index[J]. Anesth Analg, 1996, 82:1197-1204.
5Naguib I, Malabarey T, A1Satli RA, et al. Predictive models for difficult laryngoscopy and intubation. A clinical, radiologic and three-dimensional computer imaging study [J]. Can J Anaesth, 1999,46(8):748 -759.
6Sforza E, Bacon W, Weiss T, et al. Upper airway collapsibility and cephalometric variables in patients with obstructive sleep apnea[J]. Am J Respir Crit Care Med, 2000, 161(2):347-352.
8Chou HC, Wu TL. Large hypopharyngeal tongue: a shared anatomic abnormality for difficult mask ventilation, difficult intubation and obstructive sleep apnea[J]. Anesth, 2001, 94:936-937.
9Chou HC, Wu TL, Long and narrow pharyngolaryngeal passage in difficult airway[J], Anesth Analg, 2002,94(2):478-479,
10Kanaya N, Kawana S, Watanabe H, et al, The utility of three-dimensional computed tomography in unanticipated difficult endotracheal intubation[J], Anesth Analg, 2000, 91(3):752-754,
