ABSTRACT
Objective To study the diagnostic value of Spyglass visual impression and Spybite targeted biopsies for biliary strictures of unknown reasons. Methods Several Chinese and English databases were electronically searched for studies on biliary strictures diagnosed with Spyglass visual impression and Spybite targeted biopsies compared with golden standard ( pathological biopsy, autopsy and long-term clinical follow-up) . The methodological quality of the included studies was assessed according to QUADAS-2 items. The software Meta-DiSc ( version 1. 4 ) was used to conduct pooling on sensitivity, specificity, positive likelihood radio, negative likelihood radio and diagnostic odds ratio ( DOR ) . Heterogeneity test was performed and the summary receiver operating characteristic curve ( SROC ) was drawn for area under the curve ( AUC) . Results A total of 12 studies met the inclusion criteria, involving 532 patients who received Spyglass visual impression and 525 who received Spybite targeted biopsies. The combined specificity, sensitivity, positive likelihood ratio, negative likelihood ratio and DOR were 0. 90 (95％CI:0. 85-0. 94), 0. 89 (95％CI:0. 85-0. 93), 7. 12 (95％CI: 4. 36-11. 64), 0. 12 (95％CI:0. 07-0. 22)and 82. 40 (95％CI:33. 73-201. 28)for Spyglass visual impression, and 0. 98 (95％CI:0. 96-1. 00), 0. 66 (95％CI:0. 60-0. 71), 13. 29 (95％CI:6. 92-25. 53), 0. 37 (95％CI:0. 28-0. 47)and 51. 05 (95％CI:23. 58-110. 53) for Spybite targeted biopsies, respectively. The AUC on the SROC of Spyglass visual impression and Spybite targeted biopsies were 0. 9574 and 0. 9398, respectively. Conclusion Spyglass visual impression is useful for detecting malignant lesion, whereas Spybite targeted biopsies is better at confirming malignant diagnosis, which indicates combination of the two methods have good diagnostic value for indeterminate biliary strictures, but their negative results are not perfect in excluding biliary cancer.
ABSTRACT
OBJECTIVE:To establish the quality standard for Gaultheria yunnanensis. METHODS:TLC was adopted for quali-tative identification of samples. Moisture,total ash and acid-insoluble ash were determined. HPLC method was used to determine the content of methyl salicylate. The determination was performed on Eclipse XDB-C18 column with mobile phase consisted of meth-anol-water(62:38,V/V)at the flow rate of 1.0 mL/min. The detection wavelength was set at 307 nm,and column temperature was 30 ℃. The sample size was 10 μL. RESULTS:TLC spots of samples were clear and well separated. The moisture was 8.2%-10.8%,total ash was 0.9%-4.0% and acid-insoluble ash was 0.1%-0.9%. The linear range of methyl salicylate were 0.045-0.73μg(r=0.9999). RSDs of precision,stability and reproducibility tests were no more than 1.0%. The recoveries of meth-yl salicylate were 97.8%-104.3%(RSD=2.6%,n=9). CONCLUSIONS:The established standard can be used for quality control of G. yunnanensis.