Objective Using the frozen human-pooled serum samples,with values assigned by the enzyme reference procedure in laboratory network to explore the way of quantity value transfer from enzyme reference measurement system to routine ones.Methods The study is about quantity value transfer.The frozen human-pooled serum sample was assigned by the enzyme reference laboratory network including six domestic reference procedure laboratories,namely Beijing Chaoyang Hospital affiliate of Capital University of Medical Sciences,Beijing Aerospace general Hospital,Beijing Shijitan Hospital affiliate of Capital University of Medical Sciences,Peking Union Medical College Hospital,Beijing Leadman Biochemistry Co.,Ltd.and Sichuan Maker Biotechnology Co.,Ltd.,which used the reference measurement procedures of creatine kinase (CK) and lactate dehydrogenase (LDH) from the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC).First,the assigned serum was used to calibrate or verify trueness of routine measurement systems from the 49 laboratories of tertiary hospitals in Beijing in Feb,2013 by Beijing Centerfor Clinical Laboratories.Second,the assigned serum and two levels of patient samples were tested in duplicate by laboratory 's measurement systems after calibration with manufacturer's calibrator and with assigned serum.During this procedure,all laboratories data were collected.Harmonization of results was observed after calibration with the assigned serum according to the statistics.Results After calibration,the interlaboratory coefficients of variation (CVs) of two patient samples were decreased from 4.67％ and 5.96％ to 1.86％ and 1.47％ for CK and from 5.72％ and 5.04％ to 3.67％ and 3.62％ for LDH.For peer group of A and B instrument,after calibration,both CVs of the assigned serum and two patient samples were less than 2％ for CK,and less than 4％ for LDH ; For C instrument group,which was not calibrated with the assigned serum,the biases were-4.75％ for CK and-13.1％ for LDH,while the biggest CVs were 3.64％ for CK and 7.57％ for LDH.For peer group of reagents,after calibration,the CVs were decreased from 1.60％-4.44％ to 0.23％-1.62％ for CK and from 0.93％-6.07％ to 1.06％-2.72％ for LDH.Conclusions It is one of the feasible ways for quantity value transfer by using the frozen human-pooled serum samples,which were assigned by the enzyme reference laboratory network for calibration or verification.It can effectively solve the problem of trueness and harmonization of enzyme testing results.In addition,for those measurement systems which are not applicable for this calibration.

We investigated the Toxop lasma infection prevalence among planned pregnant women in Chongqing ,and to pro‐vide reference for the first level intervention of birth defects in the region .A total of 11 953 planned pregnant women were se‐lected by proportionally stratified multi‐stage random sampling method .Questionnaire survey was given to the women ,and blood samples were collected .Specific IgM and IgG antibodies against Toxoplasma were detected with ELISA .Results showed that among the 11 953 cases surveyed ,Toxoplasma IgM was positive in 71 cases ,with the positive rate of 0 .59% ;IgG was positive in 771 cases ,with the positive rate of 6 .54% .The positive rate of IgM and IgG antibodies in the metropolitan core re‐gion of the city was higher than that in the suburb areas (χ2 =35 .28 ,P<0 .000 1 ;χ2 =82 .65 ,P<0 .000 1) .The positive rate of IgM antibody increased with the educational level (χ2trend=3 .25 ,P=0 .001 1) .The positive rates of IgM and IgG varied in occupations among women (χ2 =13 .93 , P= 0 .016 0;χ2 = 15 .58 ,χ2 =0 .008 1) ,with the highest rate of public officials . Planned pregnant women with the history of abnormal pregnancy outcomes had higher positive rate of T .gondii IgM and IgG antibodies than those in the control (χ2 =6 .85 ,P=0 .008 9;χ2 =59 .25 ,P<0 .000 1) .There was no significant difference of IgM positive rate between the planned pregnancy women who had closed contact to cats and the control group (χ2 =0 .23 ,P=0 .628 6) ,while the positive rate of IgG was higher than that of the control group (χ2 =9 .95 ,P=0 .001 6) .T .gondii infec‐tion rate was on the low level of planned pregnant women in Chongqing .Adverse pregnancy outcomes are related to Toxoplas‐ma infection .

Calcinosis ; complications ; Decalcification Technique ; Humans ; Meningeal Neoplasms ; complications ; Meningioma ; complications ; Specimen Handling ; methods ; Ultrasonics

Objective To explore the multi-modal MRI characteristics of breast cancers in dense breasts.Methods 120 patients with breast cancer shown on mammography underwent breast MRI,which were solitary and confirmed by pathological examination. According to the BI-RADS classification of breast,the 120 cases were divided into two groups including dense type breast and non-dense type one.The differences in morphological features,ADC values (b=1 000 s/mm2 )and time-signal intensity curve (TIC)of the lesions between two groups were analyzed and compared.Statistical analysis was performed using SPSS1 6.0.Results The breast cancers in dense breast were vulnerable to have a spiculated margin (44/68 in the dense breast group vs.1 6/52 in the non-dense breast group,P =0.000).The size of the lesion in dense breast (1.83 ±0.98)cm was bigger than that in non-dense breast (1.40±0.46)cm (P =0.005).The non-mass-like enhancement of the lesion in dense breast was much more than that in non-dense breast (P =0.000).In addition,the average ADC values of the lesion in dense breast (0.89±0.12)×10 -3 mm2/s were lower than in non-dense breast (0.95±0.10)×10 -3 mm2/s(P =0.01 6).Conclusion The breast cancer in the dense breast has different MRI findings in comparison with non-dense breast.

To reveal the colonization characteristics in host of endophytic biocontrol bacteria NJ13 isolated from Panax ginseng, this study obtained the marked strain NJ13-R which was double antibiotic resistant to rifampicin and streptomycin through enhancing the method of inducing antibiotic. The colonization characteristics in ginseng and its biocontrol efficiency against Alternaria spot of ginseng in the field were studied. The results showed that the strain could colonize in root, stem and leaf of ginseng and the colonization amount was positive correlated with inoculation concentration. Meanwhile, the strain could infect and then transfer in different tissues of ginseng The colonization amount of strain in roots and leaves of ginseng increased first and then decreased. However, the tendency of colonization amount of strain in stems was ascend at first and then descend slowly, and was more than that in roots and leaves along with time, which had a preference to specific tissue of its host. In field experiment, the endophytic bacteria NJ13 was proved to be effective in controlling Alternaria leaf spot of ginseng. The biocontrol efficiency of fermentation broth at the concentration of 0.76 x 10(8) cfu x mL(-1) reached 75.62%, which was close to the controlling level (73.06%) of 0.67 mg x L(-1) 50% cyprodinil WG.
Alternaria ; physiology ; Antibiosis ; Bacillus ; growth & development ; isolation & purification ; physiology ; Endophytes ; growth & development ; isolation & purification ; physiology ; Panax ; growth & development ; microbiology ; Plant Diseases ; microbiology

Hemangioendothelioma, Epithelioid ; Humans ; Male ; Maxillary Sinus Neoplasms ; Middle Aged

Knee osteoarthritis is one of the common type of arthropathy, the clinical stage of the typical patients belongs to the middle-late stage, so it urges to improve the early diagnosis. At present, magnetic resonance imaging is most used in clinical diagnosis of knee osteoarthritis, and with the development of different MRI sequences, the sequences of early articular cartilage lesions are used in clinic. In the early diagnosis of knee osteoarthritis, the simple and practical methods such as ultrasonography is becoming a trend, and the specific biomarkers of early knee osteoarthritis have become the hot research. This overview article outlined the methods of early diagnosis from the ultrashort echo time MRI, ultrasonography and biomarkers.
Biomarkers ; analysis ; Early Diagnosis ; Humans ; Magnetic Resonance Imaging ; Osteoarthritis, Knee ; diagnosis ; diagnostic imaging ; metabolism ; Radiography ; Ultrasonography

Objective To discuss the surgical outcome and operative technique of the modified trans-petrosal presigmoid approach in treating cases with facial nerve palsy after petral bone fracture trea- ted with facial nerve canal decompression method.Methods A total of 15 cases with facial nerve pal- sy were treated with traumatic facial nerve canal decompression technique with the trans-petrosal presig- mold approach combined with high-dose hormone therapy,whereas 12 cases were treated with traditional Chinese medicine.The clinical data were analysed and compared retrospectively according to House- Brackmann facial nerve grading scale.Results At acute stage,eight(53.3%)out of 15 cases recov- ered to levelⅠ(P＜0.05),with no significant postoperative complications such as CSF leakage. Conclusions This approach is simple and safe and can expose extensively the facial nerve bone canal and effectively alleviate the edemous facial nerve aided by high-dose hormone therapy.Therefore,it is suitable for surgical treatment of acute facial nerve palsy after petral bone fractures.

Objective To evaluate super-selective renal arterial embolization(SRAE)in treating severe renal hemorrhage when conservative treatment had failed. Methods SRAE was performed in 111 patients with severe renal hemorrhage who had failed to respond the conservative management.The clinical data,the way of embolization,the medication and the follow-up findings were retrospectively analyzed.Results Excellent results were obtained in all patients after SRAE and no serious complications occurred.The technical successful rate with single session was 95.5%(106/111).Gross hematuria disappeared within 1-4 days after the treatment.Two patients developed shock after renal embolization and had to receive surgery after the shock was controlled.Three patients had a recurrence of hematuria,the blood urine subsided after SRAE was employed again.A follow-up with a mean period of 37.4 months was carried out in 92 patients,and the follow-up checkups showed that the renal function was well preserved in all patients.Conclusion Super-selective renal artery catheterization and embolization is a safe and effective treatment for severe renal hemorrhage,it can maximally preserve the healthy renal parenchyma as well as the renal function.Therefore,this technique should be regarded as the treatment of first choice for patients with severe renal hemorrhage.

For the current situation of the time background and the cultivation of innovation ability of undergraduates, the problems of fracture classification, function evaluation and postoperative rehabilitation were realized by a software research team which mainly consisted of medical undergrad-uates. We put the project into practice in forms of software production and software promotion trial separately in the field of teaching and clinical practice to encourage students to be involved in learn-ing in the process of software production of professional knowledge. The implementation of the project worked well, and developed the well-designed relevant mobile software which was convenient in clini-cal practice and acquired computer software copyright, indicating that it can effectively motivate the undergraduates' innovation interest and consciousness through participating in the various links and the software production process, and it can also contribute to the cultivation of the comprehensive practical and innovation ability of medical undergraduates.