Objective:To compare mini-probe endoscopic ultrasonography(MCUS)with computed tomography(CT)in pre-operative T and N staging of esophageal cancer,and to find out the MCUS parameters to judge lymph nodes metastasis for...Objective:To compare mini-probe endoscopic ultrasonography(MCUS)with computed tomography(CT)in pre-operative T and N staging of esophageal cancer,and to find out the MCUS parameters to judge lymph nodes metastasis for esophageal cancer.Methods:Thirty-five patients received both MCUS and CT preoperatively,on both of which the T and N stages were determined.The accuracy,sensitivity,specificity,positive predicting value and negative predicting value were compared with the postoperative pathological results.Results:The accuracy of MCUS was 85.7% in T staging and 85.7% and 80.0% in N staging by two different methods,which were 45.7% and 74.3%,respectively,by CT.Conclusion:MCUS is better than CT in preoperative staging for esophageal cancer.The ratio of short to long axis(S/L)combined with short axis is a useful way to determine lymph nodes metastasis.展开更多
目的采用Box-Behnken响应面法优化白藜芦醇(resveratrol)-辛酸癸酸聚乙二醇甘油酯(Labrasol)/泊洛沙姆407(P407)混合胶束(Res-Labrasol/P407-MM)的处方工艺,并考察其体外特征。方法HPLC法测定白藜芦醇含量。薄膜分散-探头超声法制备Res-...目的采用Box-Behnken响应面法优化白藜芦醇(resveratrol)-辛酸癸酸聚乙二醇甘油酯(Labrasol)/泊洛沙姆407(P407)混合胶束(Res-Labrasol/P407-MM)的处方工艺,并考察其体外特征。方法HPLC法测定白藜芦醇含量。薄膜分散-探头超声法制备Res-Labrasol/P407-MM。在单因素实验结果的基础上,以投药量、水化体积和水化温度为考察因素,胶束样品的质量浓度和药物沉降率为评价指标,采用Box-Behnken响应面法优化处方,并对最优处方制备的胶束进行外观形态、粒径和体外释放行为评价。结果最佳处方工艺为白藜芦醇投药量28 mg,水化体积9 m L,水化温度40℃,在此条件下测得白藜芦醇平均载药量为(11.62±0.20)%、平均包封率为(93.96±1.83)%、胶束平均粒径为(69.00±1.58)nm,平均Zeta电位为(-21.25±0.18)m V。样品质量浓度和沉降率的实测值与预测值偏差较小,RSD<5.5%。结论Box-Behnken响应面法预测性良好,可以用于优化Res-Labrasol/P407-MM的处方工艺。制备的混合胶束包封率高,粒径小,分布均匀,缓释效果明显。展开更多
文摘Objective:To compare mini-probe endoscopic ultrasonography(MCUS)with computed tomography(CT)in pre-operative T and N staging of esophageal cancer,and to find out the MCUS parameters to judge lymph nodes metastasis for esophageal cancer.Methods:Thirty-five patients received both MCUS and CT preoperatively,on both of which the T and N stages were determined.The accuracy,sensitivity,specificity,positive predicting value and negative predicting value were compared with the postoperative pathological results.Results:The accuracy of MCUS was 85.7% in T staging and 85.7% and 80.0% in N staging by two different methods,which were 45.7% and 74.3%,respectively,by CT.Conclusion:MCUS is better than CT in preoperative staging for esophageal cancer.The ratio of short to long axis(S/L)combined with short axis is a useful way to determine lymph nodes metastasis.
文摘目的采用Box-Behnken响应面法优化白藜芦醇(resveratrol)-辛酸癸酸聚乙二醇甘油酯(Labrasol)/泊洛沙姆407(P407)混合胶束(Res-Labrasol/P407-MM)的处方工艺,并考察其体外特征。方法HPLC法测定白藜芦醇含量。薄膜分散-探头超声法制备Res-Labrasol/P407-MM。在单因素实验结果的基础上,以投药量、水化体积和水化温度为考察因素,胶束样品的质量浓度和药物沉降率为评价指标,采用Box-Behnken响应面法优化处方,并对最优处方制备的胶束进行外观形态、粒径和体外释放行为评价。结果最佳处方工艺为白藜芦醇投药量28 mg,水化体积9 m L,水化温度40℃,在此条件下测得白藜芦醇平均载药量为(11.62±0.20)%、平均包封率为(93.96±1.83)%、胶束平均粒径为(69.00±1.58)nm,平均Zeta电位为(-21.25±0.18)m V。样品质量浓度和沉降率的实测值与预测值偏差较小,RSD<5.5%。结论Box-Behnken响应面法预测性良好,可以用于优化Res-Labrasol/P407-MM的处方工艺。制备的混合胶束包封率高,粒径小,分布均匀,缓释效果明显。
