1Mallampati SR,Gatt SP, Gugino I.D, et al. A clinical sign to predict difficult tracheal intubation:A prospective study[J]. Gan Anesth Soc 3,1985,32(4) :429 -434.
2Samsoon GI., Young JR. Difficult tracheal intubation: A retrospective study[J]. Anaesthesia,1987,42(5) :487-490.
3Ezri T,Warters RD, Szmuk P, et al. The incidence of class" zero" airway and the impact of Mallampati score, age, sex. and body mass index on prediction of laryngoscopy grade[J]. Anesth Analg,2001,93 (4) :1073-1075.
4Friedman M,Tanyeri H,La Rosa M,et al. CJinical predictors of ob structive sleep apnea[J]. Laryngoscope, 1999,109(12) : 1901 -1907.
5Hsiung MW, Pai L,Kang BH,et al. Clinical predictors of difficult la- ryngeal exposure[J]. Laryngoscope, 2004,114 (2) : 358 -363.
6Al Ramadhani S, Mohamed LA, Rocke DA, et al. Stemomental distance as the le predictor of difficult laryngoscopy in obstetric an- aesthesia[J]. Br J Anaesth,1996,77(3) :312-316.
7Yamamoto K, Tsubokawa T, Shibata K, et al. Predicting difficult in tubation with indirect laryngoscopy[J]. Anesthesiology, 1997,86 ( 2 ) : 316 -321.
9Khan ZH, Kashfi A, Ebrahimkhani E. A comparison of the upper lip bite test(a simple new technique)with modified Mallampati classifica- tion in predicting difficulty in endotracheal intubation: A prospective blinded study[J]. Anesth Analg, 2003,96 (2) : 595-599.
3Yamamoto K, Tsubokawa T, Shibata K, et al. Predicting difficult intubation with indirect laryngoscopy[J]. Anesthesiology, 1997,86:316.
4Khan ZH,Kashfi A,F.brahimkhani E,et al.A comparison of the upper lip bite test (a simple new technique) with modified Mallampati classification in predicting difficulty in endotracheal intubation:a prospective blinded study.Anssth Analg,2003,96(2):596-599.
7El-Ganzouri AR,Robert J,McCarthy RJ,et al.Preoperative airway assessment:predictive value of a multivariate risk index.Anesth Analg,1996,82(6):1197-1204.
8Bilgin H,Ozyurt G.Screening test for predicting difficult intubation,a clinical assessment in Turkish patients.Anaesth Intensive Care,1998,26(4):382-386.
9Salimi A,Farzanegan B,Rastegarpour A,et al.Comparison of the upper lip bite test with measurement of thyromental distance for prediction of difficult intubations.Acta Anaesthesiol Taiwan,2008,46(2):61-65.
10Leopold HJ,Eberhart MD,Christian Amdt MD,et al.the reliability and validity of the upper lip bite test compared with the mallampati classification to predict difficult laryngoscopy:an external prospective evaluation.Anesth Analg,2005,101(1):284-289.
