title: [Study of building up a comprehensive system for predicting difficult laryngeal exposure under suspension laryngoscopy].
abstract: OBJECTIVE
  To build up a simple and effective comprehensive system for predicting difficult laryngeal exposure under suspension laryngoscopy.
  
  
  METHODS
  One hundred and twenty cases of laryngeal tubor were selected. Using Logistic regression method to analyse relative factors, including weight, height, BMI, neck girth, neck upward degree, upper-lower incisor teeth distance, thyroid-mentum distance, thyroid-sternum distance, Mallampati test, Yamamoto test and Upper lip bite test. Build data-base to construct a comprehensive system for predicting difficult laryngeal exposure under suspension laryngoscopy.
  
  
  RESULTS
  The relative factors of difficult laryngeal exposure were BMI, neck girth, upper-lower incisor teeth distance, neck upward degree, thyroid-mentum distance, Mallampati test and Yamamoto test (P < 0.05). To build up a comprehensive system for predicting difficult laryngeal exposure under suspension laryngoscopy. The predicting standards included the seven relative factors, each factor has 1 score, 2 score, 3 score. Higher score means more risk. Eight score was designed as minimum, under the premise,the sensibility, misdiagnosis rate, missed misdiagnosis rate, specificity of the experiment were 95.5%, 5.3%, 4.5%, 94.7%.
  
  
  CONCLUSIONS
  The comprehesive system is an effective method for predicting difficult intubation. It can help to identify difficult cases according to the results of this predicting system.
authors.forename: Hongqiang
authors.initials: H
authors.lastname: Zhang
authors.forename: Sujing
authors.initials: S
authors.lastname: Tian
authors.forename: Guoqing
authors.initials: G
authors.lastname: Yang
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Li
mesh_terms: D000886:Anthropometry; D002680:Chin; D006801:Humans; D007442:Intubation, Intratracheal / Q000379:methods*; D007828:Laryngoscopy / Q000379:methods*; D007830:Larynx; D008046:Lip; D009333:Neck; D013961:Thyroid Gland