This paper presented the relationship between age and Ⅹ—ray signs in metacarpophalanges of children's hands with Kashin—Beck disease. The result showed that Ⅹ—ray signs of metaphysis in metacarpophalanges of children were decreased with age ,but the types and the positive rate of Ⅹ—ray signs in the distal end of bones ,epiphyses and carpals were increased with age. The authors consider that articular lesions in Kashin—Beck disease will be more serious and enlarge with age.

OBJECTIVETo study clinical value of shear wave elastography (SWE) in the evaluation of neck-shoulder myofascial pain syndrome.

METHODSFrom December 2013 to July 2014,30 patients diagnosed as neck-shoulder myofascial pain syndrome were in the treatment group,including 17 males and 13 females, with an average age of (44 ± 3) years old. Thirty healthy people were in the control group, including 22 males and 8 females, with a mean age of (37 ± 5) years old. The patients in the treatment group were treated with manipulation, once every other day, total 7 times. The SWE was used to detect tension part of trapezius muscle of patients in the treatment group before and after treatment, as well as to detect muscle belly at the descending part of trapezius muscle in the control group. The tissue elasticity and Yang's modulus value were recorded and compared.

RESULTSThe tissue elasticity chart of patients in the treatment group before treatment was mainly greenish blue with the score of 3.70 ± 1.53, and the Yang's modulus was (43.4 ± 15.6) kPa. The tissue elasticity figure after treatment was mainly blue with the score of 2.40 ± 0.87, and the Yang's modulus was (29.0 ± 5.9) kPa. Whereas in the control group, the tissue elasticity figure was mainly blue with the score of 1.60 ± 0.72, and the Yang's modulus was (24.0 ± 7.6) kPa. These were statistical differences between the two groups (P = 0.000).

CONCLUSIONSWE can be used as an evaluation method of manipulation treatment for neck-shoulder myofascial pain syndrome, which is an objective and sensitive detection method.

Adult ; Elasticity Imaging Techniques ; methods ; Female ; Humans ; Male ; Middle Aged ; Musculoskeletal Manipulations ; Myofascial Pain Syndromes ; diagnosis ; therapy ; Neck ; Shoulder

Adolescent ; Adult ; Burns, Chemical ; Eye Burns ; Fisheries ; Humans ; Hydrogen Sulfide ; Middle Aged ; Occupational Injuries ; Young Adult

OBJECTIVETo analyze the literature on power frequency electric field testing data and to propose views and suggestions for current testing.

METHODSThe literature on power frequency electric field testing data published in the previous years was searched to identify 306 articles involving 193 valid testing data. Mann-Whitney test and Wilcoxon W test were used for analyzing the testing data.

RESULTSThe classification of data was carried out according to one quarter of occupational exposure limit (1.25 kV/m), one half of the exposure limit (2.5 kV/m), and the exposure limit (5 kV/m). The structure of testing data showed a significant difference between the non-power facility group and the power facility group (P<0.05).

CONCLUSIONAs occupational hazard factors, the radiation exposure from power frequency electric field is extensive. However, the power frequency electric field testing data in actual workplaces except high-voltage power facilities are far less than the occupational exposure limit with little harmfulness. There is a phenomenon of excessive testing at present.

Electricity ; Electromagnetic Fields ; Humans ; Occupational Exposure ; standards ; Workplace

Objective To establish a new method to analyze the position accuracy of multileaf collimator (MLC) in the dynamic mode.Methods The MLC test sequence was created in a field,where intentional leaf positional errors ranging from 0.1 to 1 mm per centimeter were introduced.In order to establish the relationship between the ion chamber readings and leaf position,whose slope indicated the leaf position error per centimeter,a two-dimensional ion chamber array was used to measure absorbed dose while leaves were moving at dose rates of 100,300 and 600 MU/min,respectively.For routine test,leaf position error was easily found via dose profile in y direction of the field created by dynamic leaves,where the position error could be quantitatively calculated as the slope of absorbed dose line of x direction of the same field.Results The error of 0.2 mm or more per centimeter was obviously shown through y dose profile.The calibration curve was linear at different dose rates.At 600 MU/min,a 0.1 mm leaf position error corresponded to a slope variation of 0.74％,and the differences between the tested errors and the introduced errors were within 0.1 mm.Conclusions The simple and reliable method is helpful to establish the intensity modulated radiation therapy (IMRT) quality control (QC) system.

Objective To evaluate the effects on the mineral bone disorder using different calcium concentration citrate-based dialysate in maintenance hemodialysis (MHD) patients.To compare the concentrations of intact parathyroid hormone(PTH) with biointact PTH(1-84) in these patients.Methods Citrate dialysate with different calcium concentration (DCa 1.75,DCa 1.5,DCa 1.25 mmol/L)were used in turn in 15 stable MHD patients each week.Serum tCa and iCa were measured by automatic biochemistry analyzer.The concentrations of iPTH and bio-iPTH were compared.Results (1) The patients treated with DCa 1.75 citrate dialysate had increased serum iCa and tCa after dialysis,and PTH did not change significantly as compared to those findings before the dialysis.With the DCa 1.5 citrate dialysate,serum iCa and tCa were kept stable and PTH level was increased.With DCa 1.25 citrate dialysate,serum iCa and tCa decreased significantly and PTH decreased.(2)iPTH and bioPTH had excellent correlations.Variation of bio-iPTH was more correlated with the changes of calcium than iPTH.Conclusions Serum levels of iPTH,tCa and iCa can be kept stable in MHD patients treated with DCa 1.75 ～ 1.5 citrate dialysate.Bio-iPTH is a more sensitive marker for mineral bone disease than iPTH.

Through a series of chemical reactions, a kind of quaternary ammonium salt derivative of nanodiamond, ND-CO-NH-CH2-CH2-N ( CH3 ) 3+· I-( QAS-ND ) , was obtained , which was confirmed by FTIR, element analysis experiment and the electrochemistry measurements. Mixed myoglobin ( Mb) and QAS-ND solution was dropped on the surface of the glassy carbon ( GC ) electrode to prepare QAS-ND/Mb/GC modified electrode. In 0. 1 mol/L phosphate buffer solution (PBS) (pH 7. 0), Mb in the membrane exhibited direct electrochemical properties and showed good stability. The electrocatalytic property of the modified electrode toward H2 O2 was investigated, the results showed that the modified electrode could be used as the H2O2 biosensor to achieve fast, accurate detection of H2O2, with a detection limit of 3. 5 mmol/L (S/N=3).

Objective To examine the reliability and similarity of amplitude of low-frequency fluctuation (ALFF)for different scan duration.Methods 10 min 10 s resting state fMRI data acquired from 13 healthy volunteers separately were divided into 10 pieces of the same length.The reliability and similarity of ALFF were assessed for each scan length (1-10 min).Results Spatial maps of ALFF steadily appeared in each time period (1-10 min);but during the time evolution,both spatial distribution and extent of ALFF increased gradually.At only one minute,there were detectable statistical differences within the group.When the time ran-ging from 5 to 10 min,relatively stable ALFF results in the group achieved.Conclusion ALFF is a relatively stable index,it can be easily affected by scan duration.In the case of 1-5 min,it should be carefully analyzed and interpretated particularly.

Objective To investigate if women with subclinical hypothyroidism (SCH), positive thyroid gland peroxidase antibody(TPOAb) in early pregnancy accepted treatment or not had effect on perinatal outcomes. Methods 15 000 pregnant women who delivered in Women and Infants Hospital of Zhengzhou from January 1, 2013 to June 30, 2014 were recruited retrospectively. Among them, 2 042 women had SCH in early pregnancy. The diagnostic standard of SCH was serum free thyroxine (FT4) between 12.91-22.35 pmol/L and TSH level between 5.22-10.00 mU/L. TPOAb level ≥34 U/L was defined as positive result. The 2 042 patients with SCH were divided into the treated group (1 236 cases) and the untreated group (806 cases), according to whether or not women accepted the levothyroxine treatment. Meanwhile, the 2 042 patients with SCH were divided into the TPOAb (+) treated group (1 021 cases), the TPOAb (+) untreated group (201 cases), the TPOAb (-) treated group (215 cases) and the TPOAb (-) untreated group (605 cases), according to the TPOAb result and acceptance the levothyroxine treatment. 2 000 pregnant women with normal thyroid function who delivered in the same period were selected as the control group. Perinatal outcomes were analyzed. Results (1) The incidence of SCH in early pregnancy was 13.61%(2 042/15 000). 60.53%(1 236/2 042) accepted levothyroxine treatment and 39.47%(806/2 042) did not. (2) The incidence of abortion (5.71%, 46/806), premature delivery (6.20%, 50/806), gestational hypertension disease (13.90%, 112/806), gestational diabetes mellitus (GDM;6.58%, 53/806), fetal growth restriction (FGR;12.28%, 99/806)and low birth weight infants (10.17%, 82/806)in the untreated group were higher than those in the treated group [3.96%(49/1 236), 4.21%(52/1 236), 10.76%(133/1 236), 4.13%(51/ 1 236), 8.90%(110/1 236), 7.52%(93/1 236), respectively] and the control group [3.60% (72/2 000), 4.00%(80/2 000) , 10.70%(214/2 000) , 3.80%(76/2 000), 9.60%(192/2 000), 7.50%(150/2 000), respectively]. The differences were statistically significant (P<0.05). While there was no statistically significant difference in the incidence of placental abruption, anemia in pregnant women, or fetal distress among the three groups (P>0.05). (3)The incidences of abortion (11.44%, 23/201), premature delivery (12.44%, 25/201), gestational hypertension disease (22.89%, 46/201), GDM (8.46%, 17/201), FGR (19.90%, 40/201) and low birth weight infants (16.42%, 33/201) in the TPOAb (+) untreated group were higher than those in TPOAb (+) treated group [4.02% (41/1 021), 4.21% (43/1 021), 10.77% (110/1 021), 4.11% (42/1 021), 8.72% (89/1 021), 7.35%(75/1 021), respectively] and the control group, with statistically significant differences (P<0.05). The incidence of the pregnancy complications in the TPOAb (+) treated group was higher than those in the control group, but the differences were not statistically significant (P>0.05). (4)There were no statistically significant difference (P> 0.05) in the incidence of abortion (3.72%, 8/215), premature delivery (4.19%, 9/215), gestational hypertension disease (10.70%, 23/215), GDM (4.19%, 9/215), FGR (9.77%, 21/215) or low birth weight infants (8.37%, 18/215) among the TPOAb (-) treated group, the TPOAb (-) untreated group [3.80% (23/605), 4.13%(25/605), 10.91%(66/605), 5.95%(36/605), 9.75%(59/605), 8.10%(49/605), respectively] and the control group. Conclusions (1) The incidence of abortion, premature delivery, gestational hypertension disease, GDM, FGR and low birth weight infants could be increased in women with SCH in early pregnancy.(2) Thyroxine treatment could reduce the incidence of pregnancy complications in women with SCH in early pregnancy. Objective To investigate if women with subclinical hypothyroidism (SCH), positive thyroid gland peroxidase antibody(TPOAb) in early pregnancy accepted treatment or not had effect on perinatal outcomes. Methods 15 000 pregnant women who delivered in Women and Infants Hospital of Zhengzhou from January 1, 2013 to June 30, 2014 were recruited retrospectively. Among them, 2 042 women had SCH in early pregnancy. The diagnostic standard of SCH was serum free thyroxine (FT4) between 12.91-22.35 pmol/L and TSH level between 5.22-10.00 mU/L. TPOAb level ≥34 U/L was defined as positive result. The 2 042 patients with SCH were divided into the treated group (1 236 cases) and the untreated group (806 cases), according to whether or not women accepted the levothyroxine treatment. Meanwhile, the 2 042 patients with SCH were divided into the TPOAb (+) treated group (1 021 cases), the TPOAb (+) untreated group (201 cases), the TPOAb (-) treated group (215 cases) and the TPOAb (-) untreated group (605 cases), according to the TPOAb result and acceptance the levothyroxine treatment. 2 000 pregnant women with normal thyroid function who delivered in the same period were selected as the control group. Perinatal outcomes were analyzed. Results (1) The incidence of SCH in early pregnancy was 13.61%(2 042/15 000). 60.53%(1 236/2 042) accepted levothyroxine treatment and 39.47%(806/2 042) did not. (2) The incidence of abortion (5.71%, 46/806), premature delivery (6.20%, 50/806), gestational hypertension disease (13.90%, 112/806), gestational diabetes mellitus (GDM;6.58%, 53/806), fetal growth restriction (FGR;12.28%, 99/806)and low birth weight infants (10.17%, 82/806)in the untreated group were higher than those in the treated group [3.96%(49/1 236), 4.21%(52/1 236), 10.76%(133/1 236), 4.13%(51/ 1 236), 8.90%(110/1 236), 7.52%(93/1 236), respectively] and the control group [3.60% (72/2 000), 4.00%(80/2 000) , 10.70%(214/2 000) , 3.80%(76/2 000), 9.60%(192/2 000), 7.50%(150/2 000), respectively]. The differences were statistically significant (P<0.05). While there was no statistically significant difference in the incidence of placental abruption, anemia in pregnant women, or fetal distress among the three groups (P>0.05). (3)The incidences of abortion (11.44%, 23/201), premature delivery (12.44%, 25/201), gestational hypertension disease (22.89%, 46/201), GDM (8.46%, 17/201), FGR (19.90%, 40/201) and low birth weight infants (16.42%, 33/201) in the TPOAb (+) untreated group were higher than those in TPOAb (+) treated group [4.02% (41/1 021), 4.21% (43/1 021), 10.77% (110/1 021), 4.11% (42/1 021), 8.72% (89/1 021), 7.35%(75/1 021), respectively] and the control group, with statistically significant differences (P<0.05). The incidence of the pregnancy complications in the TPOAb (+) treated group was higher than those in the control group, but the differences were not statistically significant (P>0.05). (4)There were no statistically significant difference (P> 0.05) in the incidence of abortion (3.72%, 8/215), premature delivery (4.19%, 9/215), gestational hypertension disease (10.70%, 23/215), GDM (4.19%, 9/215), FGR (9.77%, 21/215) or low birth weight infants (8.37%, 18/215) among the TPOAb (-) treated group, the TPOAb (-) untreated group [3.80% (23/605), 4.13%(25/605), 10.91%(66/605), 5.95%(36/605), 9.75%(59/605), 8.10%(49/605), respectively] and the control group. Conclusions (1) The incidence of abortion, premature delivery, gestational hypertension disease, GDM, FGR and low birth weight infants could be increased in women with SCH in early pregnancy.(2) Thyroxine treatment could reduce the incidence of pregnancy complications in women with SCH in early pregnancy.

The relationship between C936T polymorphism at 3'-untranslated region of vascular endothelial growth factor (VEGF) gene and diabetic nephropathy (DN) was analysed in 194 type 2 diabetic patients. The frequencies of genotype CC and allele C were significantly higher in DN group than those in non-DN group and control group. Allele C and genotype CC of VEGF may be a genetic marker susceptible to DN.