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Objective:To evaluate the effectiveness of Simplified Airway Risk Index (SARI) score in predicting difficult airway in Chinese patients.Methods:One thousand and three hundred patients of both sexes, aged 18-90 yr, with American Society of Anesthesiologists physical status Ⅰ-Ⅲ, undergoing tracheal intubation with the laryngoscope under general anaesthesia, were enrolled in this study.SARI scores (including 7 evaluation items: mouth opening, thyromental distance, Mallampati classification, neck mobility, mandibular protrusion, body weight, and history of difficulty in tracheal intubation) were determined before anesthesia induction.The receiver operating characteristic curve and area under the curve (AUC) were used to evaluate the effectiveness of SARI scores in predicting difficult tracheal intubation and difficult laryngoscopy.Results:The AUC and 95% confidence interval of the SARI score, mouth opening, modified Mallampati classification and thyromental distance in predicting difficult tracheal intubation were 0.91 (0.89-0.93), 0.84 (0.82-0.86), 0.81 (0.79-0.83) and 0.83 (0.80-0.85), respectively.The AUC and 95% confidence interval of the SARI score, mouth opening, modified Mallampati classification and thyromental distance in predicting difficult laryngoscopy were 0.90 (0.88-0.91), 0.79 (0.76-0.81), 0.76 (0.74-0.78) and 0.73 (0.70-0.75), respectively.The AUC of SARI scores in predicting difficult tracheal intubation and difficult laryngoscopy was significantly larger than that of the mouth opening, modified Mallampati classification and thyromental distance ( P<0.05). Conclusion:The SARI score produces better efficacy in predicting tracheal intubation and difficult laryngoscopy in Chinese patients.
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Objective To evaluate the effect of the LEMON method in predicting difficult air-way.Methods A total of 1 528 patients scheduled for elective surgery requiring tracheal intubation under general anaesthesia,680 males and 848 females,aged 18-83 years,ASA physical status Ⅰ orⅡ,were enrolled in the study.We used the LEMON method to assess airway conditions before an-aesthesia and recorded the scores.The primary end point was difficult tracheal intubation.The sec-ondary end point was difficult laryngoscopy.Receiver operating characteristic (ROC)curve analysis and the area under the curve (AUC)were used to evaluate the clinical effect of the LEMON mothod. Results There were 37 cases with difficult tracheal intubation and 106 cases with difficult laryngosco-py.The incidence of difficult tracheal intubation and difficult laryngoscopy were 2.4% and 6.9%,re-spectively.The area under the curve of the LEMON method for predicting difficult laryngoscopy and difficult tracheal intubation were 0.884 (95% CI 0.867-0.899)and 0.934 (95% CI 0.921-0.946), respectively.Conclusion The LEMON method has good clinical effect in predicting difficult airway.
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By using microwave extraction, a GC/MS method was developed for the determination of polycyclic aromatic hydrocarbons ( PAHs) content in soil which is around the discharge ditch of oily wastewater, and a correlation analysis of the content of organic matter in soil was carried out. The results showed that PAHs in the surface soil pollution were mainly from 2 to 4 rings of low molecular PAHs, and the PAHs with high molecular were not detected. Each sampling point belongs to slight or moderate pollution and the overall assessment is moderate pollution, which is middle and low lever in comparison with soil data of central regions. The origin may be the low molecular PAHs of oil pollution along with the atmospheric transmission, but it cannot be completely excluded the possibility of fuel combustion pollution. No obvious correlation was found between the content of polycyclic aromatic hydrocarbons and organic matter.