The CHISS statistical software which has its own copyright protection in China is applied to the teaching in medical statistical. A questionnaire was carried out among 135 applicants after they had learnt the modern statistical method for 18 teaching hours and practiced on computers with CHISS for 6 teaching hours. Those applicants gave out the evaluations: CHISS has the character of convenient and visual demonstration. It can meet the needs of medical statistical teaching and doing research.

Purpose:To analyze the CT appearances and diagnostic value of inflammatory pseudotumor of the liver(IPL)_O Materials and Methods: The CT findings of 19 patients with inflammatory pseudotumor of the liver proved by pathology were analyzed respectively.Results: 17 cases were solitary lesion and 2 cases had multiple lesions.19 lesions showed hypodense,2 lesions isodense on pre-contrast.On the contrast CT scan,showed no enhancement during arterial phase,but during portal venous phrase and delayed phase,strong enhancement at the edge and septa in the center or mural node,of the lesions were visible.Conclusion: CT diagnosis is possible in most cases of IPL by three phase dynamic scanning.

Objective To analyze the levels of high density lipoprotein ( HDL) and low density lipoprotein ( LDL) among the staff in a college .Methods Fasting serum samples were collected from 2 234 paticipants .The lev-els of HDL and LDL in different sex and ages were estimated .Results The average value and abnormal rate of LDL in males were 3.20mmol/L and 49.1%,respectively.The average value of LDL in males was higher than normal val-ue.The average value and abnormal rate of LDL in females were 3.03mmol/L and 42.3%,respectively.The value of LDL in females who less than 54 years old was lower than that in males of the same age ( t=5.33,10.56,all P<0.01).Conclusion The abnormal rate of LDL had significant increase and the level in males was higher than that in females.The health education is necessary to prevent and control the abnormal level of LDL .

Objective To study the possible mechanisms of influence of different doses of UVA1 on the development of hypertrophic scar in rabbit ears induced by excision of full-thickness skin. Methods A hypertrophic scar model was established by excision of full-thickness skin on the ventral surface of rabbit ears.A total of 24 New Zealand white rabbits were randomly and equally divided into 4 groups to receive UVA1 radiation on the left ear immediately (U0 group), 1 month (U1 group), 2 months (U2 group) and 3 months (U3 group) after the excision, respectively, and each group were classified into two subgroups to be irradiated with UVA1 of 60 (middle) and 110 (high) J/cm2, respectively, for 30 sessions. The right ears served as the control without irradiation. Skin samples were obtained from the ears of rabbits before the first and after the last irradiation, transmission electron microscopy (TEM) was used to observe the ultra-structure and morphology of collagen fiber and fibroblasts, and immunohistochemical staining was performed to measure the expressions of matrix metalloproteinases (MMP)-1, tissue inhibitor of metalloproteinase (TIMP)-1, transforming growth factor (TGF)-β1, proliferating cell nuclear antigen (PCNA) and α-smooth muscle actin (α-SMA) in skin samples. Results Compared with the unirradiated skin, irradiated skin showed higher expression levels of MMP-1 (P ＜ 0.05), which were 10.43 ± 1.61 and 11.16 ± 1.57 in middle- and high-U1 group, 8.63 ± 2.61 and 7.33 ± 1.58 in middle- and high-U2 gorup, 5.74 ± 1.43 and 3.11 ± 0.27 in middle- and high-U3 group respectively. The expression level of TGF-β1 in irradiated skin was 12.51 ± 4.13 and 12.02 ± 5.02 in middle- and high-U1 group, respectively, 18.74 ± 6.42 and 19.69 ± 4.52 in middle- and high-U2 group, respectively, 20.51 ± 1.78 and 29.45 ± 6.55 in middle- and high-U3 group, respectively. A significant decrease was observed in the expression of PCNA in irradiated skin in middle- and high-U1 group (2.67 ± 0.44 and 2.04 ± 0.65), middle- and high-U2 group (4.50 ± 0.97 and 5.82 ± 0.68), middle- and high-U3 group (7.45 ± 1.47 and 8.16 ±1.07) in comparison with unirradiated skin (all P＜ 0.05). There was a lower expression of TIMP-1 in irradiated skin of high-U1, -U2, and -U3 group (12.74 ± 4.58, 15.17 ± 3.26, 20.72 ± 3.31, all P＜ 0.05) as well as α-SMA in that of high-U1, middle-U1 and high-U2 group (1.33 ± 0.34, 2.04 ± 0.20, 3.60 ± 1.75, all P＜ 0.05) compared with the unirradiated skin. Further more, a significant increment was observed in the expressions of TGF-β1 (23.90 ± 2.92, P ＜ 0.05) in irradiated skin of high-U0 group, PCNA(7.42 ± 0.65 and 7.59 ± 0.31 ),TIMP-1 (29.82 t 1.94 and 33.51 ± 1.19) and α-SMA (6.31 ± 0.61 and 2.97 ± 0.56) in irradiated skin of middle- and high-U0 group, but a decline in the expression of MMP-1 (.25 ± 0.38, P＜ 0.05) in irradiated skin of high-U0 group in comparison with the unirradiated skin. TEM showed that the collagen fiber diameter turned small, and fibroblasts, most of which were quiescent, showed a reduction in cytoplasm volume with the presence of immature organelles, after high-dose UVA1 irradiation. Conclusions The therapeutical effect of UVA1 on scar may be realized by accelerating the degradation of matrix proteins and decelerating the proliferation of fibroblasts and myofibroblasts via downregulating the expressions of TGF-β1, TIMP-1 and α-SMA and upregulating the expression of MMP-1. However, the results would be opposite if the interference with UVA1 irradiation is given at the early stage of wound healing.

Objective To study the effects of different doses of UVA1 on the development of hypertrophic scar in rabbit ears induced by excision of full-thickness skin. Methods A hypertrophic scar model was established by excision of full-thickness skin (2 cm×5 cm) on the ventral surface of rabbit ears. A total of 18 New Zealand rabbits were randomly divided into 3 equal groups to receive UVA1 radiation on the left ears immediately, 1 month, and 2 months after the excision, respectively, and every group were classified into two subgroups to be irradiated with 60 and 110 J/cm2 of UVA1, respectively, for 30 sessions. The right ears served as control without irradiation. HE staining and Masson staining were used to examine the dermal thickness and collagen content in scar, respectively. Results Compared with pre-irradiation, the dermal thickness (t = 5.85, 4.94, respectively, both P＜0.05) and collagen content (t = 6.50, 8.02, respectively,both P＜0.05) significantly decreased in scar irradiated with UVA1 of 110 J/cm2 one and two months after the excision. The difference value in dermal thickness and collagen content at the beginning and at the end of the study significantly differed between irradiated and non-irradiated ears in the rabbits treated with UVA1 of 110 J/cm2 (P＜0.05). The effects of UVA1 on dermal thickness and collagen content were dose-dependent (P＜0.05). On the contrary, the dermal thickness and collagen content markedly increased in scars of rabbits irradiated with UVA1 immediately after the excision (P＜0.05 ). Conclusions To begin UVA1 exposure of hypertropic scar in rabbits after epithelialization may lead to the softening of scar, thinning of skin, and decrease of collagen content. However, immediate irradiation with UVA1 after wound could not prevent the development of hypertrophic scar in rabbits, in contrast, it exacerbated the severity of scar.

Objective To explore and establish the effective model of assessment for residen-cy training. Methods Totally 181 residents completed general specialist stage of resident training of Liaoning province in 2010. Assessment process was designed and implemented for general specialist training stage, including theory exam (basic knowledge, professional knowledge and public knowledge) and objective structured clinical examination (OSCE) (standardized patient(SP), computer-based case simulations(CCS) and clinical skills operation). T test and variance analysis were used and P≤0.05 stands for statistically significant difference. Results The total results consisted of two parts, theory examination results (40.00%) and OSCE results (60.00%) and two students failed the examination. The mean score of OSCE was up to standard (66.58±5.50). The mean score of SP and CCS was close to standard. The mean score of clinical skills operation reached a good level. In terms of the OSCE, SP examination and CCS examination, the performance of residents from the two universities had sig-nificant difference (t=3.818, P=0.000; t=5.581, P=0.000; t=5.419, P=0.013) and the performance of residents from the five hospitals also had significant differences. Conclusions The assessment of standardized resident training is improving gradually. Through the widespread application of OSCE in the assessment;it could be helpful to the clinical training of residents.

Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Pneumoconiosis ; diagnostic imaging ; Radiography, Thoracic ; methods ; Tomography, X-Ray Computed

Objective To assess patients' self-management behaviors and examine factors influencing self-management behaviors in patients undergoing maintenance hemodialysis.Methods This research was conducted as a descriptive survey by 125 patients from a hemodialysis clinic in Tianjin.The data were collected with self-management behaviors questionnaire of hemodialysis patients and self-efficacy scale for managing chronic disease.Results Regression analysis revealed sex,educational level and selfefficacy were independent predictors for self-management behaviors.Conclusions Hemodialysis patients' self-management behaviors need to be improved in the future.Healthcare professionals should recognize the factors hindering self-management behaviors from the patients' perspective while assisting them with appropriate skills in making behaviors changes possible.

Objective To investigate the effect of morphine combined with cisplatin on inva-sionon and migration of human lung adenocarcinoma cell A549.Methods Human lung adenocarcino-ma A549 cells were inoculated on cultured for 24 h,then were randomly divided into 5 groups:control group (group CON),cisplatin group (group CIS),morphine 0.3 μg/ml+ cisplatin group (group MT1),morphine 3 μg/ml+ cisplatin group (group MT2),morphine 30 μg/ml+ cisplatin group (group MT3).Cisplatin concentration was 4μg/ml.Each group was medicated immediately after 48 h incubation,invasion detection cells by Transwell assay,cell scratch assay cell migration ability, Western-blot detection of matrix metalloproteinase-2 (MMP-2),the expression of MMP-9,Ezrin protein and Fascin protein.Results Compared with group CON,group CIS and morphine combined with cisplatin group reduced tumor cell invasion and migration ability,group MT3 and CIS down-reg-ulated MMP-2,MMP-9,Ezrin and Fascin expression (P<0.05).Compared with group CIS,com-bined with cisplatin group enhanced tumor cell invasion and migration ability group MT3,up-regula-ted MMP-2,MMP-9,Ezrin and Fascin expression (P<0.05).Conclusion Morphine may dose de-pendently reduce cisplatin on invasion and migration of human lung adenocarcinoma cell line A549, and up-regulation of MMP-2,MMP-9,Ezrin,Fascin expression is one of its possible mechanisms.

Objective To identify significantly differentially expression of rat by genes chip,try to find out the initiating factors and molecular mechanisms that oxidative stress originate or strengthen the steriod-induced necrosis of femoral head(SINFH).Methods Twenty Wistar rats were dived into experimental group and control group randomly.The rats were injected intraperitoneally whith endotoxin,and then injected intramuscularly with high-dose methylprednisolone or saline in experimental group and control group respectively.The mRNA was extracted from the femoral head of rats inevery group,and the cDNA probes were obtained by inverse transcript,and then carried out microarray detection.The quantitative RT-PCR was used to confirm the results of the microarray.Results Histopathological findings revealed that the experimental group rats had femoral head necrosis,trabecular bone disorders,thinning,bone cell necrosis,and the rate of empty lacunae increased,and in control group no femoral head osteonecrosis was found.Total of 27 differentially expressed genes were found,and of which 4 genes(COX6A2,COX4I2,SOD3,and DUSP1)were significantly different.The expression of these 4 genes were down-regulated.The functions of these four genes involved in inhibition of reactive oxygen species(ROS)generation,accelerated removal of ROS and protection tissue from oxidative damage and so on.Conclusion The expression of oxidative stress-related genes in SINFH of rats exist change.COX6A2,COX4I2,SOD3,and DUSP1 are key genes in process of oxidative stress originate or strengthen the SINFH.