2.Artificial Abortion Has Important Effect on the Development of Adenomyosis
Fei YU ; Weiwei GAO ; Yuquan ZHANG
Journal of Medical Research 2006;0(08):-
0.05).The proportion of patients with repeated artificial abortion or history of curettage of uterus in AM group was higher than that in the no-AM group.The patients with pregnancy time more than 8 weeks who received artificial abortion had higher rate of development of AM.Conclusion Repeated artificial abortion,pregnancy time and history of curettage of uterus were the risk factors of development of adenomyosis.
3.Investigation on Water Source Pollution by Cryptosporidium parvum and Giardia lamblia in the Small Towns and Villages in Shenzhen,China
Shuyuan YU ; Fei TANG ; Zhicheng ZHANG
Journal of Environment and Health 1989;0(06):-
Objective To investigate the water source pollution by parasitic protozoa in small towns and villages in Shenzhen,China,in order to present the data to establish the national hygienic standard for controlling parasitic protozoa pollution.Methods The samples of water source were collected from 8 village level water plants in Shenzhen.Giardia lamblia and Cryptosporidium were detected,according to the EPA methods,by filtering,rinsing,magnetic isolation and staining.Results Giardia lamblia was found in water sources of 6 water plants and Cryptosporidium was found in one water plant.Conclusion At present,some water sources of village level water plants where the reservoirs were used as the water source in Shenzhen have been polluted by Giardia lamblia and Cryptosporidium,that indicates the potentiality of the water-born-diseases in that areas.
4.Artificial Abortion Has Important Effect on the Development of Adenomyosts
Fei YU ; Weiwei GAO ; Yuquan ZHANG
Journal of Medical Research 2009;38(8):71-73
Objective To study the factors such as artificial abortion frequency, pregnancy time and so on on development of adeno-myosis (AM). Methods A retrospective analysis was carried in 462 patients who were from the department of gynaecology and obstetrics in Affiliated Hospital of Nantong University and Beijing Aviation Center Hospital from January 2004 to December 2008. The patients were divided into two groups: AM and no - AM. The two groups were compared for abortion frequency, pregnancy time, age, menarche age and so on. Results There were no significant differences between the two groups in age, menarche age, age of the first artificial abor-tion, bearing frequency, IUD with pregnancy and so on(P > 0.05). The proportion of patients with repeated artificial abortion or history of curettage of uterus in AM group was higher than that in the no - AM group. The patients with pregnaney time more than 8 weeks who re-ceived artificial abortion had higher rate of development of AM. Conclusion Repeated artificial abortion, pregnancy time and history of curettage of uterus were the risk factors of development of adenomyosis.
5.A Study on the Diagnostic Value of Dynamic Contrast-Enhanced CT in the Solitary Pulmonary Nodules
Yu XIANG ; Fei ZHOU ; Tiegang ZHANG
Journal of Chinese Physician 2001;0(08):-
Objective To explore the value of dynamic contrast-enhanced CT for differentially diagnosing benign and malignant the solitary pulmonary nodules. Methods 117 solitary pulmonary nodules proved by histopathological examination were enrolled in this study. Thin-section CT scanning was performed before and 1,2,3,4 and 5 minutes after contrast enhancement. Results The enhanced value of malignant nodules (39.6?15.8)Hu was significantly higher than that of benign nodules (19.18?17.23)Hu (P
6.Research of Automatic QT Interval Detection Based on Morphological Method
Hui YU ; Fei DU ; Lixin ZHANG
Space Medicine & Medical Engineering 2006;0(01):-
Objective To study and design a new algorithm of QT interval measurement based on multi-scale morphological derivative transform(MMDT) according to the demands of mobile monitoring platform.Methods After the MMDT of ECG signals by inducing a triangle and a short line as a pair of structure elements,they were classified into four types by their morphological characteristics and the optimal strategy for each type was described to detect the onset of Q-wave.By introducing the "wing" function,two referenced points of T peak were picked out,which was helpful to locate the peak and offset of T wave,and improve the precision and recognition rate of MMDT method when detecting the bifid T wave(90.9%)and biphasic T wave(86.7%).Results Eighty data records from CSE database were used to evaluate the availability.By contrast with the wavelet transform method,the statistical results showed that the proposed algorithm had generally less error and smaller standard deviation especially for abnormal-phase T wave.Conclusion Compared with those algorithms based on wavelet transform and self-adaptive threshold techniques,our algorithm needs less empirical parameters and calculation.It is also suitable for mobile monitoring and HOLTER system,and has a wide prospect of application.
7.MR elastography on 3.0 T scanner: a preliminary study of fiver stiffness measurements and inter-rater consistency in volunteers and patients with chronic fiver disease
Yu SHI ; Qiyong GUO ; Lan ZHANG ; Fei XIA ; Bing YU
Chinese Journal of Radiology 2013;47(11):1005-1008
Objective To estimate reliability of magnetic resonance elastography (MRE) in measuring liver stiffness of volunteers and patients with chronic liver disease and to assess inter-rater consistency.Methods MRE was performed on a 3.0 T scanner in all subjects,including 24 volunteers (control group) and 64 patients with liver disease (chronic liver disease group).Liver stiffness was measured blindly by two raters.The pathological fibrosis score was applied as a standard reference for liver fibrosis in 22 patients.The intraclass correlation coefficient (ICC) was used to evaluate inter-rater reliability.The differences of liver stiffness between two groups were evaluated using non-parametric MannWhitney U test.Spearman analysis was used to analyze the correlation between fibrosis stages and liver stiffness.Results The intraclass correlation coefficient of liver stiffness was perfect (ICC =0.99,P < 0.01)between two raters.There was significant difference of mean stiffness between control group and patient group (U =90.5,P <0.01) with(2.35 ±0.34) kPa and(4.17 ± 0.47) kPa,respectively.The correlation between fibrosis stage (3,3,5,5 and 6 patients in fibrosis stage S0,S1,S2,S3 and S4) and stiffness (2.13,3.25,3.82,5.45 and 7.35 kPa) was very strong (r =0.96,P <0.01).Conclusion MRE is a reliable and promising tool to measure liver stiffness and to assess liver fibrosis.
8.13 cases of Abamectin poisoning.
Yu-fei GUO ; Yi WANG ; Ji-xian ZHANG
Chinese Journal of Industrial Hygiene and Occupational Diseases 2010;28(6):472-472
Adult
;
Female
;
Humans
;
Insecticides
;
poisoning
;
Ivermectin
;
analogs & derivatives
;
poisoning
;
Male
;
Middle Aged
9.CT,MR and MRS Diagnosis of Basal Ganglia Infarction
Bolang YU ; Fan FAN ; Qinli SUN ; Ming ZHANG ; Fei WANG
Journal of Practical Radiology 1996;0(04):-
Objective To discuss imaging differentiating diagnosis of basal ganglia infarction by summarizing the features of 17 lesions on CT and MRI.Methods Among 17 cases, 6 were children occurred after their injury, and ranged in age from 5 to 11 years old with average 8 years old. Others were adults ranged in age from 53 to 78 years old with average 63 years old. All patients were examined with CT plain scans. 11 cases were underwent MRI and 5 were underwent 1 H MRS.Results 6 lesions in children were all single lateral cases. Among 11 adult lesions, 10 were single lateral and 1 was bilateral case. Basal ganglia infarctions demonstrated hyposignal on T_1WI, hypersignal on T_2WI and hypodense on CT. The lateral ventricles' anterior horns of the same side were pressed and narrow. On 1 H MRS, Lac was obviously observed in all lesions. NAA decreased markedly in 4 lesions and slightly in 1 lesion. 2 basal ganglia infarctions were together with hemorrhage.Conclusion Basal ganglia infarctions were mainly observed in the elder with arteriosclerosis and injured children. Its features on CT and MRI are characteristic, but it is in need of differentiating from basal ganglia lesions caused by other reasons. Marked Lac on 1 H MRS is its character.
10.Iodine nutrition survey of children aged 8 to 10 in coastal and non-coastal areas of Rizhao city Shandong province
Yu-kui, FEI ; Ying, ZHANG ; Pu-liang, LIU
Chinese Journal of Endemiology 2012;31(1):78-80
Objective To investigate the iodine nutritional status of children aged 8 to 10 in both costal and non-costal areas of Rizhao city Shandong province,and provide a basis for scientific supplementation of iodine.Methods In 2009 and 2010,townships of Lanshan and Donggang were chosen as survey points which situated close to the coast,the counties of Wulian and Juxian that were more than 50 kilometers away from the coast were selected as controls.The iodine concentration of drinking water in every village and water supply point was determined.At the county level,5 to 9 towns were selected according to their sub-area positions of east,west,south,north and center,4 villages were selected in each chosen township,8 - 15 households were selected in each chosen village,edible salt from the households was collected; 5 primary schools were selected in each chosen township,60 students aged 8 - 10 were selected to take thyroid examination in each chosen school.Twenty copies of urine samples were collected from the 60 students to detect the iodine concentration.Iodine in drinking water was tested by cerous sulfate catalytic spectrophotometry,in iodized salt by direct titration,in urine by arsenic-cerium contact method,and thyroids were examined by palpation.Results Totally 3483 copies of drinking water samples,1164 copies of edible salt samples,and 476 copies of urine samples were tested,and a total of 1200 children aged 8 to 10 were investigated; and the ratio of water iodine frequency distribution ≤ 10 μg/L (in costal and non-costal area) accounted for 90.03% ( 1011/1123 ) and 91.10% (2150/2360),respectively,the medians of water iodine were 5.6 and 4.2 μg/L,respectively; the iodine medians of edible salt were 29.03 and 29.99 mg/kg,respectively; the consumption rates of qualified iodized salt were 96.77% (569/588) and 97.05% (559/576),respectively; total goiter rates were 1.17%(7/600) and 1.33%(8/600),respectively; the medians of urinary iodine were 144.05 and 159.15 μg/L,respectively; the percentages of urinary iodine that bellow 100 μg/L were 26.58% (63/237) and 22.59% (54/239),respectively; between 100 - 300 μg/L were 66.75% (158/237) and 64.02% (153/239),respectively;above 300μg/L were 6.75% (16/237)and13.39% (32/239),respectively.ConclusionsThe costal of Rizhao is an iodine deficient area.The current popularity of household's consumption of qualified iodized salt is suitable.The levels of iodine nutrition of children aged 8 to 10 is appropriate,which met the national standard of elimination of iodine deficiency disorders (IDD).There is no iodine excess.There are no significant differences in levels of iodine nutrition between costal and non-costal areas on the premise that the same iodized salt is supplied in both the areas,and there is no need to make differentiated supply of iodized salt.