Objective To evaluate the effect of various sampling errors on ELISA test results. Methods Standard sample volume,standard sample volume reducing 1,2,3,4 μL or adding 1, 2,3 μL were respectively pipetted into the wells of a microplate,follwed by routine operation of ELISA test. Then the influence of various sampling errors was analyzed on ELISA test results of HBsAg, HCV and TP. Results S/CO value was increased with the increase of sample volume. The statistical difference of mean S/CO value of HBsAg and TP was only found between sample volume adding 3 μL group and control group(P<0.05). For HCV result, there were significant differences between standard sample volume adding 2,3μL or reducing 3,4μL groups and control group(P<0.05), while no obvious differences were found in the other groups(P>0.05). The difference of mean positive rate between ex-perimental groups and control group showed an increasing tendency with the reduction of sample vol-ume,and significant differences in HBsAg, HCV and TP results were also found between sample vol-ume increase groups and reduction groups(P<0.05). Conclusion Various sampling errors influence ELISA test results to different degrees,and the extent increases with the reduction of standard sample volume.

The quality management of drug research,development,registration,production and marketing strengthened by good practice for pharmaceuticals ensure the drag safety,effectiveness and quality control.Teaching of new drug research and evaluation in compliance with good practice for pharmaceuticals will be of value in making teaching content close to actual work,extending the students'knowledge and training student's good habits in scientific study.

Objective To observre the change of plasma arginine vasopressin(AVP)in plasma and relationship of AVP with brain edema after traumatic brain injury(TBI).Methods The rat models of mild and severe degree local cerebral cortex injury were caused by free dropping.Radioimmunoassay was used to measure serial concentration of AVP in plasma in 45 rats with acute brain injuries at the 24th,48th,72th hour and the 5th day after brain injury.The content of injury brain water was measured by drying-wetting way.Results AVP levels had positive correlation with the severity of brain edema.The severer brain injury resulted in higher AVP level and longer persistent time of peak brain edema(P＜0.05).Conclusion AVP level is closely associated with edema after TBI.AVP may play a vital role in pathogenesis of brain edema.

Animals ; Biological Specimen Banks ; utilization ; Humans ; Specimen Handling ; methods ; Tissue Fixation ; methods

Anion Exchange Protein 1, Erythrocyte ; metabolism ; CD56 Antigen ; metabolism ; Desmin ; metabolism ; Desmoplastic Small Round Cell Tumor ; metabolism ; pathology ; surgery ; Diagnosis, Differential ; Humans ; Lymphoma ; metabolism ; pathology ; Male ; Middle Aged ; Rhabdomyosarcoma ; metabolism ; pathology ; Sarcoma, Ewing ; metabolism ; pathology ; Testicular Neoplasms ; metabolism ; pathology ; surgery ; Vimentin ; metabolism

ObjectiveTo investigate the diagnostic value of color Doppler ultrasound for peripheral intrahepatic cholangiocarcinoma (ICC).MethodsNinety- five patients with ICC which were confirmed histopathologically were retrospectively studied.The features on color Doppler ultrasound were analyzed.ResultsThere were 102 tumors which ranged from 20 mm× 20 mm to 130 mm× 100 mm in size.On gray-scale ultrasonic imaging,a large proportion of the tumors presented with inhomogeneous echo (n=75,73.5％), indefinite boundaries (n =70, 68.6％),and irregular shape (n=55,53.9％).On color Doppler ultrasonic imaging,most tumors had flow signals (75,73.5％) mainly in the shape of areatus,short- line and color-dot.Most flow signals had a resistant index greater than 0.6.Of the 102 tumors,thirty-seven (36.3％) were observed to produce streak hyperecho,twentynine (28.4％) slight attenuation in the rear and 22 (21.6％) unbilical depression.The coincidence rate with ultrasound was 84.2％(80/95). ConclusionsThe features of peripheral intrahepatic cholangiocarcinoma on color Doppler ultrasound are characteristic.To be able to appreciate these features is helpful to improve on the accuracy rate of ultrasound.

Aged ; Female ; Fibroma ; pathology ; Fibroma, Ossifying ; pathology ; Gingival Neoplasms ; pathology ; Humans

0.05), but the level of albumin dropped significantly(P

Objective To discuss the preliminary experience of transcatheter aortic valve implatantion in patients with severe aortic valve stenosis. Methods The baseline characteristics, hemodynamic changes and clinical outcomes of the patients received TAVI in our institution were analyzed. Results A total of 36 patients underwent TAVI between April 2012 and March 2014. The mean age was (73.4±8.7) years and 24 (66.7%) of them were men. The mean logistic EuroSCORE was (20.6±9.9)%. 25(70%) patients had bicuspid aortic valves. TAVI was successful in 35 patients (97.2%) and valve-in-valve implantation was required in 4 (11.1%) of them. After the procedure, the mean aortic-valve gradient reduced to (10.5±5.7) mmHg. In 2 patients (5.6%), there was marginal moderate periprosthetic leak. At 30 days, the survival rate was 97.2%. Two patients (5.6%) developed who later showed fuel recovery, without significant sequela. Permanent pacemakers were implanted in 10 patients (27.8%) due to the onset of third-degree atrioventricular block after TAVI. To date, the median follow-up duration has exceeded 323 days. 2 patients died of cancer on 374 days and 680 days after TAVI, respectively. Conclusions TAVI is feasible, safe and effective in treating severe stenosis of bicuspid as well as tricuspid aortic valve in selected Chinese patients unsuitable for surgery.

Objective To evaluate the value of contrast-enhanced ultrasound (CEUS) in preoperative classification for hilar cholangiocarcinoma. Methods Forty-six patients with 46 hilar cholangiocarcinoma were diagnosed by surgical pathology in Zhongshan Hospital of Fudan University from January 2007 to April 2013. The echogenicity difference on conventinal ultrasound and CEUS were compared with chi-square test. The accuracy of conventinal ultrasound and CEUS for evaluating invaded bile duct, detective rates for portal vein invasion and displaying rate of metastatic hilar lymph nodes were compared with chi-square test or Fisher’s Exact test according to the golden standard of operative exploration. Results On CEUS, 82.6%(38/46) and 91.3%(42/46) hilar cholangiocarcinoma were hypoechoic in portal vein phase and delayed phase respectively, while 63.0%(29/46) hilar cholangiocarcinoma were isoechoic on conventinal ultrasound with vague margin. The clearly displaying rates were 37.0%(17/46), 84.8%(39/46) and 91.3%(42/46) in conventinal ultrasound, portal vein and delayed phase of CEUS and the echogenicity was signiifcantly different. The evaluation accuracy of hilar cholangiocarcinoma invading bile duct was improved from 80.4%(37/46, conventinal ultrasound) to 100%(46/46, CEUS) significantly (χ2=7.882,P=0.005). Portal vein invasion were found in 9 cases during operative exploration and the detective rates on conventinal ultrasound and CEUS were 78%(7/9) and 89%(8/9) without signiifcant difference (P=1.000). Metastatic hilar lymph nodes were found in 8 cases and the displaying rates on conventinal ultrasound and CEUS were the same (75%, 6/8) without signiifcant difference (P=1.000). Conclusions CEUS could signiifcantly improve the clearly displaying rate of hilar cholangiocarcinoma and improve the evaluation accuracy for invaded bile duct comparing with conventinal ultrasound.