Objective To assess the feasibility and accuracy of transesophageal echocardiography (TEE) in screening patients,intraoperative guidance of occluder releasing and efficacy assessment in the patients of percutaneous left atrial appendage (LAA) occlusion with Watchman.Methods Ultrasonic instrument Philips iE33(proble model X7-3t) were used to measure the maximum diameter and the depth of LAA ostium in enrolled patients by TEE,and intraoperative guided puncture of interatial septum,positioning Watchman transmission system and instruction closure release under TEE,immediate evaluate the postoperative therapeutic effect and record the complications by TEE.At 45 days after implantation,patients should repeat TEE to assess the efficacy.Results Eighteen patients underwent device implantation.Seventeen patients implant successfully,except one patient can't implant device beacuse of the LAA morphologe was not suitable.There was one patient showing thrombus formation on the surface of device,one patient of LAA and the device axial angulation was 90 °.At 45 days after implantaion,16 patients were fullowed up,there were no major stroke at all.Conclusions TEE has important application value in screening of preoperative patients,intraoperative guidance of occluder releasing and efficacy assessment in the patients of percutaneous left atrial appendage occlusion with Watchman.

Objective To investigate the relationship between RKIP expression and the efficiency of radiotherapy in NPC patients and evaluate the possibility of using RKIP as a predictor of radiosensitivity.Methods A total of 180 patients with NPC in Sun Yat-sen University Cancer Center without evidence of distant metastasis at initial diagnosis were enrolled in this study,who had received intensity-modulated radiotherapy alone.Patients were classified into 2 groups according to criteria below:patients with biopsy proven recurrent diseases occurring at nasopharynx and/or neck within 5 years after radiotherapy were classified as the radioresistant group.The pathological type at relapse was the same as the previous one before treatment.Patients with a minimum follow-up of 5 years after radiotherapy without evidence of recurrence at the original site of the tumor were classified as the radiosensitive group.Patients in the 2 groups were matched according to the factors related with radiosensitivity.RKIP was examined by immunohistochemical staining before radiotherapy.The relationship between RKIP expression and the effect of radiotherapy were analyzed.Results The positive rate of the RKIP expression in the radiosensitive group versus the radioresistant group was 80.0％ versus 26.7％.The positive rate (x2 =12.498,P ＜0.01) and the intensity of the RKIP expression (x2 =51.429,P ＜ 0.01) were significantly different between 2 groups with a negative correlation with radio-resistance to NPC (r =-0.344,-0.535,respectively,P ＜ 0.01).Based on the RKIP expression,the radiosensitivity,specificity,accuracy,positive predictive value,negative predictive value,false positive and false negative were predicted as follows:80.0％,73.3％,77.2％,75.0％,78.6％,26.7％,and 20.0％,respectively.Conclusions RKIP protein shows negative correlation with radioresistance to NPC and could serve as a biomarker in preliminarily screening the intrinsic radiosensitivity of NPC.

Objective:To develop the minimal clinically important difference (MCID) of Quality of Life Instruments for Cancer Patients-Leukemia (QLICP-LE) (V2.0).Methods:The quality of life of 101 patients with leukemia in First Affiliated Hospital of Kunming Medical University and First People′s Hospital of Yunnan Province from October 2011 to May 2012 were measured. The QLICP-LE (V2.0) was used for data collection, and the MCID for the overall score and scores of various domains of QLICP-LE (V2.0) were established by using the distribution-based approach including indexes of effect size, standard error of measurement (SEM), reliable change index, standardized response mean and responsiveness statistic, and the recommended values of MCID were determined through the consensus method.Results:The MCID formulated by the above five indexes were as follows: the total scale 1.4-9.3, physical functional domain 1.6-15.6, psychological functional domain 2.9-15.6, social functional domain 2.2-18.0, common symptoms and side-effects domain 1.7-17.1, common module 1.8-10.0, and the specific module 1.1-12.1. Through the expert consensus method, it was recommended to use the MCID results calculated by 1.96SEM: the total scale was 4, physical domain was 8, psychological domain was 8, social domain was 9, common symptoms and side-effects domain was 9, common module was 4, and the specific module was 6.Conclusion:Each index of distribution-based approach has its own advantages and disadvantages, which can be selected based on actual conditions. There is clinical significance when the score change of QLICP-LE (V2.0) of leukemia patients after treatment exceeds its MCID.

OBJECTIVE：To study the spectrum-ef fect relationship of anti-hepatoma effect of C Ⅱ-3 extract from Periplaneta americana，and to preliminarily clarify the anti-hepatoma active components of it. METHODS ：Based on UHPLC fingerprints of 10 batches of C Ⅱ-3 samples，with the help of UHPL C-Q-TOF/MS，the compounds corresponding to each chromatographic peak were identified qualitatively by standard substances and related literatures. Using the IC 50 value of each batch of C Ⅱ-3 sample against human hepatoma cells HepG 2 as anti-hepatoma activity index ，the spectrum-effect relationship of fingerprint and anti-hepatoma effect was established and analyzed by the combination of grey relational analysis （GRA）and orthogonal partial least squares（OPLS）. RESULTS ：There were 25 common peaks in UHPLC fingerprints of 10 batches of C Ⅱ-3 samples，and 10 chemical compounds were identified ，which were cyclo- （Tyr-Pro）（peak 24），cyclo-（Gly-Phe）（peak 15），hypoxanthine（peak 3）， adenine（peak 7），phenylalanine（peak 10），inosine（peak 11），N-acetyldopamine（peak 16），cyclo-（Pro-Ala）（peak 13），2-hydroxy propionyl（peak 22），cyclo-（Pro-Ser）（peak 6）. The IC 50 of 10 batches of C Ⅱ-3 samples to HepG 2 cells was 70.550-200.303 μg/mL. Among 25 common peaks ，the order of GRA correlation （r）of anti-hepatoma activity was peak 20＞23＞24＞15，all of r values were greater than 0.7；the order of variable importance projection （VIP）of OPLS analysis was peak 23＞18＞15＞24＞7＞14＞6＞ 2＞20，all of VIP values were greater than 1. The standard regression coefficients of peak 7，15，20，23，24 were all greater than 0；while the standard regression coefficients of peak 2，6，14，18 were all less than 0. Conjoint analysis shows that the order of anti-hepatoma activity was peak 20＞23＞24＞15. CONCLUSIONS：unknown chemical ingredients （peak 20， ），cyclo-（Tyr-Pro）（peak 24）and cyclo- （Gly-Phe）（peak 15） in C Ⅱ-3 may be main anti-hepatoma active components.