Objective To analyse the causes of complications and accidents of arthroscopy and a discussion of the preventive measures. Methods 1 540 cases of arthroscopy were carried out from May 1980 to May 1999, including 1 426 cases of the knee, 59 of the ankle, 17 of the wrist, 21 of the first metatarsophalangeal joint, 8 of the hip, 6 of the elbow and 3 of the shoulder. Results Surgical instruments (blade, tip of forceps) broken in the articular cavity took place in 8 cases, injury of the normal tissue including the cartilage, meniscus, and ligaments happened in 40 cases, nerve branch and vascular injured around the inlets in 11 cases, water seeping out in 13 cases, infection following the formation of hematoma in 5 cases, refracture of patella during operation in 1 case, myocardial infarction after operation in 1 case, totally, complications and accidents were seen in 79 cases (5.1％ ). Conclusion Arthroscopic complications are mainly related to unskillful manipulation of the instruments, poor team work, inadequate exposure of intra-articular structure and negligence of timely replacing the nearly worn parts of the apparatus. The complications can all be prevented by improving above mentioned points.

Objective To investigate the change of serum CA724, CA242 and AFP levels before and after transcatheter artery chemoembolization (TACE) treatment of primary hepatic carcinoma(PHC)patients as well as its clinic significance. Methods Patients of PHC (n=45) and healthy adults (n=40) were enrolled. Serum samples were collected from each healthy people and PHC patients 2 days before TACE,l week and 1 month after TACE. Electrochemiluminescence Immunoassay (ECLI) was used to determine serum CA724, CA242 and AFP levels, and correlations among three indexes as well as their relationships with clinical data were also analysed., Change of serum CA724 and CA242 levels before and after TACE were compared in AFP<400μg/L group and AFP≥400μg/L group. Results Serum levels of CA724, CA242 and AFP in PHC group were significantly higher than that in healthy control groups before TACE therapy(P<0.05). Positive rates of serum CA724 and AFP were higher in PHC group(P<0.01)than that in healthy control group. AFP decreased significantly at both 1 week and 1 month upon TACE treatment compared with that at before teratment(P<0.01). CA724 was significantly lower at one month after treatment than that at before treatment(P<0.05). But there was no significant difference in CA242 before and after treatment(P>0.05). CA724 and AFP expressions are associated with tumor size(P<0.05). After one month of therapy, serum CA724 level was obviously decreased in both AFP<400μg/L and AFP≥400μg/L groups. Before and after TACE therapy, there was a positive correlation between the expression of AFP and CA724(r=0.754,P<0.05). Conclusion Serum CA724 can be used as one of the tumor markers to assist the evaluation of curative effect of TACE on PHC.

OBJECTIVE:To observe therapeutic efficacy and safety of recombinant human brain natriuretic peptide (rhBNP) in the treatment of acute decompensated heart failure (ADHF). METHODS:129 ADHF patients admitted in our hospital during Jul. 2013-Jul. 2015 were randomly divided into observation group(69 cases)and control group(60 cases). Control group was giv-en routine treatment. Observation group was additionally given rhBNP 1.5 μg/(kg·d)vein shock(d1),and then rhBNP 1 mg+5%Glucose injection 100 ml by 0.007 5 μg/(kg·min),ivgtt(d2-4). Treatment courses of 2 groups lasted for 7 d. Therapeutic efficacy and heart function indexes [left ventricular ejection fraction(LVEF),left ventricular end-diastolic diameter(LVDd)] were observed in 2 groups as well as NT-proBNP level,medication fluid intake and urine volume 24 h after medication. The occurrence of ADR was observed. RESULTS:3 cases dropped out and 66 cases were included finally in doservation group. Total effective rate of AD-HF therapy in observation group (96.97%) was significantly higher than in control group (86.67%),with statistical significance (P<0.05). There was no statistical significance in LVEF,LVDd and NT-proBNP between 2 groups before treatment(P>0.05). Af-ter treatment,LVEF of 2 groups were increased significantly while LVDd were decreased significantly;LVEF of observation group [(42.3±3.6)%] was significantly higher than in control group[(37.9±3.3)%],while LVDd of observation group [(55.5± 3.6)%] was significantly lower than in control group[(61.3 ± 3.4)%]. NT-proBNP levels of 2 groups were decreased significant-ly,and the observation group [(1 389.5±29.6)pg/ml] was significantly lower than the control group [(2 778.0±26.8)pg/ml]. 24 h after medication,urine volume of 2 groups were significantly higher than medication fluid intake,and urine volume of observation group [(1 781.4 ± 89.7)ml] was significantly higher than that of control group [(1 372.6 ± 78.3)ml],with statistical significance (P<0.05). There was no statistical significance in the incidence of ADR between observation group (3.03%) and control group (5.00%),without statistical significance(P>0.05). CONCLUSIONS:rhBNP is significantly effective for ADHF,promotes heart function recovery and reduces renal function injury with good safety.

Objective To explore the clinical characteristics of localized peritoneal mesothelioma by the retrospective analysis of the clinical data and its relationship with asbestos exposure.Methods A total of 22 cases with localized peritoneal mesothelioma confirmed by pathological test and they were selected as our subjects in the Central Hospital of Cangzhou from Jan.2007 to Dec.2012.The information of all cases was collected.The incidence,asbestos exposure history,clinical manifestations,imaging studies,pathological type,immunohistochemistry and tumor markers of peritoneal mesotheliom patients were recorded or measured.Results Of 22 cases,female accounted for 68.18％.The periods from onset symptoms to treatment time was from 2 days to 1 year with an average of 83 days.Clinical symptoms were verified including localized abdominal pain (11 cases,50.00％),abdominal mass (8 cases,36.36％),abdominal distension (6 cases,27.27％),ascites (10 cases,45.45％).Patient was with increased platelet and carcinoma antigen 125.Abdominal computerized tomography showed that local mass was seen and 12 cases were with asbestos spot.Ultrasound-guided peritoneal biopsy was confirmed as the main diagnostic method followed by Laparotomy.Epithelial type was the main pathological type (19 cases,86.36％),following the fleshy tumor type and mixed type.Eighteen cases had asbestos exposure history.Conclusion Localized peritoneal mesothelioma is a rare disease.However,the incidence is high in the current region due to asbestos exposure.Abdominal pain and local mass are the main clinical symptoms,and the main pathology is epithelial typeas well as surgery is the main therapy.

Objective Onto investigate the indoor quality control method for qualitatively detecting the laboratory indicators of TORCH infection (rubella virus IgG ,cytomegalovirus IgG and IgM ,toxoplasma IgG and IgM ) .Methods The statistical method , normal distribution data ,ratio and standard deviation of positive rate detected by the ELISA method were adopted ,1+2s was set as the out of control rules ,the semi Lerey‐Jennings quality control chart was drawn;the direct probability calculation method was a‐dopted for the non‐normal distribution data and small probability event .The testing data of 57 batches were retrospectively ana‐lyzed .Results The positive rate of rubella virus IgG was 86 .66% ,cytomegalovirus IgG/IgM positive rates were 98 .87% and 0 .13% ,toxoplasma gondii IgG/IgM positive rates were 2 .43% and 1 .71% ,the data of 151 ,3 ,5 ,176 ,27 samples had the critical value range of five indicators .The number of out of control was once for cytomegalovirus IgG ,once and 4 times for Toxoplasma gondii IgG/IgM .Conclusion The indoor quality control for the ELISA qualitative detection of TORCH infection can adopt the data of daily detection positive rate or negative rate for monitoring the false positive .The critical value range of specimens should be fur‐ther conducted the recheck or confirmation experiment .

BACKGROUND:The comfortable shoes can absorb or reduce the impact force from the ground. Is the damped system is absent in shoes to relieve the impulse,the feet will be extremely tired,even damage the human knee joint,waist,back and brain. OBJECTIVE:To measure the changes of human plantar pressure by different sole hardness through the measurement system of plantar pressure. DESIGN,TIME AND SETTING:An observation experiment was performed in the Shanghai University of Sport between December 2008 and February 2009.PARTICIPANTS:Six volunteers wearing the experimental designed shoes were recruited from Nanjing Institute of Physical Education.METHODS:Three pairs of experimental shoes weighing 103 g were measured with shore hardness tester,as 51,62 and 69 hardness values. Accordingly they were named soft shoes,medium hardness shoes and hard shoes. The subjects were asked to do a 60-minute walk test at the speed of 2 m/s on the running platform with the experimental designed shoes,and they were determined using the insole plantar pressure measurement system of German's Novel style series of Emed-pedar.MAIN OUTCOME MEASURE:The pressure,contact area and impulse in the sole of foot.RESULTS:With the increase in hardness soles,the pressure of center plantar was shown to move from the medial first metatarsal outwards by turns. Compared with barefoot walking,the trail length of the center plantar was prolonged in subjects with medium hardness shoes and hard shoes,while shortened in subjects with soft shoes. The total pressure when you walked with soft shoes and medium hardness shoes were reduced than barefoot walking,and the pressure of walking phase wearing these two types of shoes were also reduced,while total pressure and walking phase pressure with hard shoes were both increased compared with barefoot walking. The contact area was similar between soft shoes and medium hardness shoes,but the smallest in the hard shoes. Except the increase in the initial 10 minutes,the soft shoes had no change with the medium hardness shoes. The hard shoes were firstly increased but then declined. The total impulse of medium hardness shoes was the closest to bare feet,while that of soft shoes and hard shoes were increased compared with bare foot.CONCLUSION:The plantar pressure was the greatest in the hard shoes,then medium hardness shoes and last soft shoes;the contact area was the greatest in soft shoes,then medium hardness shoes and last hard shoes;the impulse was the greatest in hard shoes,then soft shoes,and last medium hardness shoes.

A highly sensitive and selective DNA biosensor is described based on the fluorescence quenching ability of MoS2 nanosheet and exonucleaseⅢ( ExoⅢ) assisted dual-signal amplification. In this sensor, the fluorescence probes ( HP1 and HP2 ) cannot be degraded by Exo Ⅲdue to the 3 '-termini protrusion and thus are adsorbed on the surface of MoS2 nanosheets, which will result in the quenching of MoS2 nanosheets toward the probes and induce a low fluorescent signal. The presence of the target DNA leads to the desorption of probes on the surface of MoS2 nanosheets due to the hybridization toward probes, generating many fluorescent fragments by Exo Ⅲdigestion and inducing dual-signal amplification. This method can improve the sensitivity and detection limit compared with single amplification method, and shows excellent selectivity in the discrimination of single base mismatched targets. On the basis of the significantly high sensitivity, the developed biosensor can be potentially extended to detect various DNA targets with excellent sequence selectivity.

BACKGROUND:Artificial tissue-engineered bone combined with acel ular bone matrix has been shown to be favorable for bone repair. OBJECTIVE:To explore the safety and biocompatibility of the stromal vascular fraction of the adipose tissue combined with the acel ular bone matrix-chitosan scaffold in the repair of rabbit radial defects. METHODS:A total of 38 New Zealand rabbits were selected, 3 rabbits were used to extract stromal vascular fraction of adipose tissue, 3 used to prepare acel ular bone matrix and 32 divided into experimental and control groups. Models of rabbit radial defects were established using Brownlow method. The rabbits in the experimental group were treated with the SVF of adipose tissue combined with the acel ular bone matrix-chitosan scaffold, while those controls received no treatment. General situation, gross observation, X-ray examination, histological observation and Lane-Sandhu scores were performed at 2 and 4 months postoperatively. RESULTS AND CONCLUSION:No infections occurred in both two groups at 2 and 4 months postoperatively, but the activity level and degree of healing in the experimental group were significantly better than those in the control group. In the experimental group, there were high-density shadows at 2 months postoperatively and the X-ray image of the bone defect site was the same as that of the normal one at 4 months, while bone nonunion occurred in the control group. The bone tissues in the experimental group grew significantly better than that in the control group at 2 and 4 months postoperatively, and the Lane-Sandhu histological scores in the experimental group were significantly higher than those in the control group at 2 and 4 months postoperatively (P<0.05). These results indicate that the stromal vascular fraction combined with the acel ular bone matrix-chitosan scaffold exhibits safety and biocompatibility in the repair of rabbit radical defects.

Objective To investigate the typical value of gamma-radiation dose rate and its confidence interval in tank-transported copper ore by using bootstrap resampling techniques. Methods Bootstrap resampling method, coupled with kernel density estimation, introduced to acquire the typical value of gamma-radiation dose rate in copper ore. Results The typical value of gamma-radiation dose rate in copper ore was expressed as the central tendency of the means of resampling, and two kinds of confidence interval, empirical percentile and bias-corrected accelerated confidence interval, were provided as standard error. Conclusion It is clearly demonstrated that this method has an advantage to give a robust description in explanation of central tendency and variation range of gamma-radiation dose rate data profiles.

Objective To study the relationship between the risk of malignant tumor and occupational radiation factor among medical diagnostic X-ray workers in Jiangsu province.Methods The retrospective and prospective cohort studies were adopted to investigate the incidence of cancer.Eligible medical diagnostic X-ray workers from the department of radiology in hospitals were selected and assigned into exposure group,while other medical workers from the departments of Internal Medicine,Ear-NoseThroat (ENT) or Pediatrics who attended work at the same period in the same hospital but not engaged in radiation work were regarded as control group during 1950-2011 in Jiangsu province.We calculated the total person-year and analyzed the relative risk (RR) of malignant tumor using Poisson regression model.Results 7 703 participants (3 961 in exposed group and 3 742 in unexposed group) were recruited and followed up,with a total of 315 309 person years and the lost follow-up rate was 6.92％ (533/7 703).During the follow up period,a total of 819 tumor cases were identified (771 were malignant tumors).We found the significant relationship between the risk of malignant tumor and occupational radiation factor,and the RR of solid cancer and total malignant tumor were 1.31 (95％ CI:1.11-1.55) and 1.33 (95％ CI:1.13-1.57),respectively.In addition,the risk of lung cancer in medical diagnostic X-ray workers was significantly higher than that in control group (RR =1.45,95％ CI:1.00-2.09).Conclusions The incidence risk of lung cancer,solid caner and total malignant tumors in medical diagnostic X-ray workers was significantly higher than that in the control group,which might be associated with occupational exposure to ionizing radiation.