Objective To establish practical cell model of HCV infection, and investigate the susceptibility of a human liver cell line HepG2 to hepatitis C virus in vitro. Methods A human liver cell line HepG2 was incubated with serum from a chronic hepatitis C patient for 6～8 hours. Both the plus and minus strands of HCV RNA in infected cells or supernatant were examined by reverse transcription polymerase chain reaction (RT PCR). The HCV NS 3,NS 5 antigens in infected cells were respectively detected with the monoclonal antibodies to antigens of their own by immunohistochemical assay. The minus strand of HCV RNA in infected cells were localized by in situ hybridization. Results The intracellular plus or minus stands of HCV RNA were first detected on day 3 post incubation and then could be intermittently detected until day 35 post incubation in cells or supernatant. The positive signals of NS 3,NS 5 antigens could be expressed within cytoplasm of infected cells. The minus strand of HCV RNA was located within cytoplasm by in situ hybridization. Conclustions These results show that a human liver cell line HepG2 is not only susceptible to HCV but also able to support its long time replication in vitro.

Objective To study the incidence of pelvic adhesions in endometriosis(EM) and the relationship between pelvic adhesions and pain symptoms. Methods The incidence of pelvic adhesions, dysmenorrhea, chronic pelvic pain, dyspareunia, dyschizia in 480 patients with EM were studied retrospectively to evaluate the correlation between pelvic adhesions and the degree of pain symptoms. In accordance with the revised American Fertility Society classification (r-AFS), it was observed that 155 cases were in Stage Ⅰ,33 cases were in stage Ⅱ,108 cases were in stage Ⅲ and 184 were cases in stage Ⅳ. Results (1) Among 480 cases with EM, 72.3% (347/480) of patients have pelvic adhesions simultaneously, of which 25.2% (39/155) patients were in Stage Ⅰ, 78.8% (26/33) patients were in Stage Ⅱ, 90.7% (98/108) patients were in Stage Ⅲ and 100.0% (184/184) patients were in Stage Ⅳ. It was found that positive correlation existed between the degree of pelvic adhesions and clinical staging of EM(rs=0.870,P<0.01).(2) 61.0%(293/480) of patients presented dysmenorrhoea, of which the percentages of mild, moderate and severe dysmenorrhea were 52.2%(153/293), 26.6%(78/293), 21.2% (62/293), respectively. The rate of patients presenting chronic pelvic pain (CPP), dyspareunia and dyschezia were 23.8% (114/480), 15.4% (74/480) and 7.1% (34/480), respectively. (3) Ovarian adhesions was positively correlated with dysmenorrhea and CPP(rs=0.367 and 0.267,P<0.01). Adhesion of the bottom and posterior wall of uterus was positively correlated with dysmenorrhea and CPP (rs=0.336, 0.164,P<0.01); adhesions of fallopian tubes were positively correlated with dysmenorrhea, CPP and dyschezia (rs=0.283, 0.225 and 0.159, P<0.01). Adhesions of rectum was positively correlated with dysmenorrhea (rs=0.101,P<0.05). In addition to dyspareunia, the degree of pelvic adhesions was positively correlated with dysmenorrhea, CPP and dyschezia (rs=0.470, 0.273, 0.132, P<0.01). Conclusion Pelvic adhesions are characteristic lesions of endometriosis, the site and degree pelvic adhesions are closely correlated with pain symptoms.

Objective To develop the Chinese version of multidimensional measure for recurrent ab-dominal pain scale(MM-RAP) and test the reliability and validity of it. Methods The Chinese version of MM-RAP was translated and revised and 100 children with recurrent abdominal pain and their parents were surveyed by it. Then the reliability and validity of the scale was tested. Results The teat-retest reliability coefficient of MM-RAP was 0.86. The total Cronbach's coefficient α of the scale was 0.80. Cronbach's coef-ficient α of each dimensions was above 0.70. The results of correlation analysis showed that there was higher correlation between items and its belonged dimensions than that with other dimensions. The results of confir-matory factor analysis indicated the factor structure was similar with the theoretical construction of the in-strument. Conclusions The Chinese version of MM-RAP demonstrated good reliability and validity and was an effective assessment instrument for measuring recurrent abdominal pain of Chinese children.

Cervical cancer poses a major threat to public health worldwide, early diagnosis of cervical cancer can improve the survival rate of patients. The detection rate of the existing cervical cancer screening methods is not very stable, and there is no reliable non-invasive index to predict the recurrence, metastasis and prognosis of cervical cancer. We searched literaruture for cervical cancer-related diagnostic and prognostic indicators and included 20 related literature, confirming that liquid biopsy is expected to replace and supplement the existing methods of screening and testing. Circulating nucleotides are an important part of liquid bioassays, including circulating cell-free DNA (cfDNA) and circulating cell-free RNA (cfRNA), among which cfRNA is a potentially rich source of tumor biomarkers, especially in the early diagnosis of cervical cancer. It has unique specificity and great potential value in the early diagnosis.

Put forward opinions and suggestions about characteristics of the new era of medical disputes pre -vention treatment through the analysis of a hospital in the past five years occurred in 44 medical disputes .We must fo-cus on innovation and long -term mechanism to prevent medical malpractice , medical malpractice to further improve the prevention, comprehensive mechanism , and continuously improve the effectiveness of medical dispute processing services.

Objective To explore the reason for remedy radical operation after endoscopic submucosal dissection (ESD) for early gastric cancer.Methods The clinical data of 26 early gastric cancer cases who received remedy radical gastrectomy after ESD between January 2012 to March 2015 in Nanjing Drum Tower Hospital were analyzed retrospectively.Results All cases were followed up and mid follow-up was 25 months.There was no death nor tumor reccurence cases during the follow-up.Three cases suffered from complications in radical surgery for gastric cancer including afferent jejunal loop obstruction,adhesive intestinal obstruction,stomach paralysis respectively,all were cured by conservative therapy.Postoperative pathology found lymph node metastasis in 3 cases.Conclusions En bloc resection and negative resection margin,as well as free lymphatic metastasis are two important factors determing the survival of early gastric cancer patients undergoing ESD treatment.

Objective To investigate the clinical effects of preoperative eye position training on femtosecond laser-assisted laser in situ keratomileusis(FL-LASIK)? Methods One hundred and sixty-eight myopia patients(328 eyes)scheduled for selective FL-LASIK were randomly divided into the experiment group of 85 cases(166 eyes)and the control group of 83 cases(162 eyes)?The patients in the control group were given the routine preoperative education and the patients in the experiment group received the preoperative intervention of eye position besides routine preoperative education? The two groups were compared in terms of intraoperative changes of eye position,corneal topography and the postoperative visual acuity? Results The frequency of eye position adjustment and machine stopping in the experiment group was significantly smaller than that of the control group(P < 0?001)? But no significant differences were found between the two groups in corneal topography and the postoperative visual acuity(P > 0?05)? Conclusion Preoperative training of eye position may maintain ideal eye position and reduce the frequency of downtime due to eye position adjustment during FL-LASIK,which may ensure the successful completion of FL-LASIK?

Objective To investigate the importance of elements of teaching aesthetic(appearance aesthetics; language aesthetics; emotion aesthetics; PPT aesthetics; blackboard-writing aesthetics and model aesthetics) in clinical orthopaedic teaching,and to analyze the reasons and significance of them.Methods Totally 137 medical students(2005 and 2006 grade) were investigated by the questionnaire in resent 2 years.They were asked to choose the first two important elements of teaching anesthetic from six elements displayed by four teachers.Results The percentage of appearance aesthetics,language aesthetics,emotion aesthetics,PPT aesthetics,blackboard-writing aesthetics and model aesthetics were showed as 97.4％,88.7％,67.1％,58.9％,13.6％ and 1.2％ respectively.Conclusion Teaching aesthetics is an indispensible part of teaching aesthetically and it is helpful to promote the teaching.We should be focus on PPT aesthetics and appearance aesthetics,which show high percentage in our research.

Contents in orthopaedic are independent relatively and finding out the internal relations during them is helpful to improving the effect of orthopaedic teaching.Transfer theory is important tools for clinical teaching practice,and finding out the common characteristics between the orthopaedic chapters is primary for the theory.This research focuses on the following fields:fractures,nerve injury,infection,tumor and deformity.After the common characteristics between these chapters were analyzed and discussed,we concluded that the transfer theory is helpful in orthopaedic teaching practice,especially for students' comprehension and memory,but still we should avoid some negative effects in teaching process.

Objective To evaluate the clinical effect of arthroscopic treatment of popliteal cyst.Methods Data of 42 patients,who had undergone arthroscopic treatment for popliteal cyst from November 2005 to January 2010,were retrospectively analyzed.There were 13 males and 29 females,including 6 children,aged from 11 to 68 years (average,43.2 years).All popliteal cysts were unilateral,including 14 cases of right knee and 28 cases of left knee.Eleven patients had recurrent popliteal cyst,and all of them underwent initial open surgery,and the duration from the initial surgery to recurrence ranged from 6 to 35 months (average,18 months).According to the Rauschning and Lindgren classification,there were 3 cases of grade Ⅰ,18 cases of grade Ⅱ and 21 cases of grade Ⅲ.Based on the MRI,the long diameter of the popliteal cysts ranged from 4.2 to 7.9 cm (average,5.4 cm),the transverse diameter 2.1 to 2.5 cm (average,2.3 cm) and anteroposterior diameter 1.6 to 2.2 cm (average,2.0 cm).All popliteal cysts were at posteriomedial parts of the knees,and 11 cases of popliteal cyst communicated with the knee joint cavity.Before operation,1 to 2 ml methylene blue was injected into the cyst,which was used to determine the channel intraoperatively according to the site where methylene blue flowed out.The intraarticular diseases were thoroughly treated when the inner wall of the popliteal cyst was cleaned.Results The intraarticular diseases were found in all patients intraoperatively,including medial meniscus tear in 28 cases,lateral meniscus tear in 9 cases and lateral discoid meniscus in 4 cases.There were no blood vessel complications,nerve complications and incision complications.All patients were discharged 2 or 3 days postoperatively.All patients were followed up for 10 to 30 months (average,18 months).No recurrence of popliteal cyst occurred at final follow-up.According to the Rauschning and Lindgren classification,there were 38 cases of grade 0 and 4 cases of grade Ⅰ.Conclusion The arthroscopic treatment of popliteal cyst has several advantages,such as mini-invasion,fast recovery and low recurrence rate.