BACKGROUND:The colagen and chitosan composite membrane made at a certain percentage can reduce the positive charge of chitosan, improve the adsorption force of chitosan, promote the cel adhesion and growth, migration and proliferation, and enhance the biological properties of chitosan, which has become a very excelent biological material. OBJECTIVE:To prepare chitosan-colagen composite membrane and observe its histocompatibility with corneal stroma layer. METHODS:Chitosan-colagen composite membrane was prepared. Totaly 16 New Zealand rabbits were randomly divided into experimental and control groups. The chitosan-colagen composite membrane was implanted into right eye cornea stroma bag in the experimental group, and the chitosan membrane was implanted into right eye cornea stroma bag in the control group. The slit lamp microscope, anterior segment optical coherence tomography and histological observation were conducted after transplantation. RESULTS AND CONCLUSION: Slit lamp microscope observation results showed that after 8 weeks of transplantation, degradation infiltration was visible in the center of the diaphragm, crease buckling was not obvious in the experimental group; the diaphragm was infiltrated completely and crease buckling was notable in the control group. The anterior segment optical coherence tomography results showed that at the 6thweek after transplantation, the composite membrane boundary was fuzzy, its density was very close to the normal corneal tissue, and the corneal shape recovered to normal in the experimental group. The histological findings showed that after 8 weeks of transplantation, in the experimental group, the membrane surface was degraded a little; biodegradable materials were fused with the corneal stroma; there were a smal amount of inflammatory cels infiltrated on the corneal stroma around the iris. In the control group, the membrane degradation was greater than that of the experimental group; degradable substances intertwined and fused with corneal stroma; there were more inflammatory cels infiltrated on the corneal stroma around the iris. These results demonstrate that chitosan-colagen composite membrane has degradability and good histocompatibility.

Acupuncture Points ; Acupuncture Therapy ; Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Sciatica ; therapy

Objective To study the influence of different dosages of atorvastatin in acute coronary syndrome female patients on vascular endothelial growth factor(VEGF) and brain natriuretic peptide(BNP).Methods 60 female cases of ACS patients were divided into A and B group.30 patients in the A group were given atorvastatin 20mg per night,while the other 30 patients in the B group were taken 40mg per night.The patients were followed four weeks by evaluating serum VEGF and BNP concentration.Results After treatment for four weeks,the patients in the two groups showed significant reduction in VEGF and BNP,however,the therapeutic group showed significant difference between the two groups.Additionally,the B group further showed significant reduction in VEGF and BNP.Conclusion Using high-dose atorvastatin lowers VEGF and BNP significantly,which could reduce female cardiovascμlar events.

Through the study and analysis of doctor-patient relationship in the morden medical conditions in China,in this article,the author,combing with her medical praltice for many years,points out some principal problems existing in the relationship,and also puts forward some feasible countermeasures which will be helpful to set up harmonious doctor-patient relationship and ensure the durable and normal development of Chinese medical and healthy cause.

BACKGROUND:Effects of pedicle screw placement on fracture reduction or stability of mechanics are influenced by various factors. Pedicle screw fixation failure is mainly due to fracture, loosening and fatigue. The main influential factors for biomechanical stability of pedicle screw are length and diameter. The research on the depth is less. OBJECTIVE:To analyze the relationship between pedicle screw placement depth of vertebral body and the fixed stability based on the biomechanics. METHODS: A model of single vertebral compression fractures was made in 15 pigs aged 5 months on L2 vertebral specimen. According to the length of anteroposterior diameter, vertebral pedicle screws were inserted in different depths (80%, 90% and 100% of anteroposterior diameter). After fixation, specimens were loaded 10 000 times at the frequency of 0.5 Hz (340±125) N on a WDT-10KN type universal material testing machine. Ranges of motion at anteflexion, backward extension, left bending and right bending and the maximum axial pulout force were measured in each group, and the difference of intergroup data was compared. RESULTS AND CONCLUSION:(1) Ranges of motion at anteflexion, backward extension, left bending and right bending in each group were significantly smaler in the 100% and 90% groups than in the 80% group (P < 0.05), and above parameters were smaler in the 100% group than in the 90% group (P< 0.05). (2) After fatigue test, the maximum axial pulout force was significantly larger in the 100% and 90% groups than in the 80% group (P< 0.05), and above data were significantly larger in the 100% group than in the 90% group (P < 0.05). (3) Results indicate that the depth into the vertebral body was significantly associated with its fixed stability. The deeper the depth into the vertebral body, the stronger the vertebral stability was: 100% group > 90% group > 80% group.

Objective:To explore the serum IgG4 level in patients with IgG4-related Hashimoto thyroiditis(IgG4 HT),and its clinical implications.Methods:The serum IgG4 was determined in 129 patients with HT using enzyme-linked immunosorbent assays and classified into two subgroups based on IgG4 level:IgG4 HT group(IgG4≥135 mg/dl)and non-IgG4 HT group(IgG4<135 mg/dl).And the levels of serum thyroid hormone and thyroid peroxidase antibodies(TPOAb)and thyroglobulin antibodies(TgAb)were measured by electro-chemiluminescence immunoassay.Ultrasonic imaging of the thyroid gland were detected.Results:The TPOAb levels correlated significantly with both serum IgG4 levels(r=0.437 1,P=0.012 7)and IgG4/IgG ratios(r=0.396 2,P=0.023 5)in the patients with HT.Compared with that of non-IgG4 HT group(n=97),IgG4 HT group(n=32):①The mean age was lower(P=0.029 3);②Higher levels of serum TPOAb(P=0.002 1)and TgAb(P=0.012 8);③Ultrasound imaging:the more obvious thyroid nodule(P=0.022 6);④Logistic regression analysis showed that serum IgG4 and TPOAb were the risk factor for thyroid nodules(OR=1.672,P=0.021;2.549,P=0.014 ).Conclusion: IgG4 HT patients existed corresponding clinical characteristics.For the HT-patients with elevated serum IgG4,thyroid function and morphology should were more closely monitored.

Objective To survey the social support status and demands for family caregivers of the disabled elderly.Methods A cross-sectional survey based on convenience sampling was conducted among 779 disabled elderly and their family caregivers from May to June 2013 in five communities of Beijing Dongcheng District.Barthel index was used to measure the degree of functional impairment of the elderly.Self-rating Depression Scales (SDS) was used to evaluate depression symptoms of caregivers.Social Support Rating Scale (SSRS) and social support demand questionnaire were used to measure the social support status and social support demands of caregivers,respectively.Multiple linear regression analysis was used to analyze the influence factors of social support.Results Total 779 caregivers were identified and 744 caregivers completed the questionnaires with a valid response rate of 95.5％.Among 744 family caregivers the social support levels were low with an average SSRS score of 31.16 ± 6.86.There were significant differences in SSRS scores among caregivers of disabled elderly with different characteristics (age,married status and the Barthel index score) (all P ＜ 0.05);and there were significant differences in SSRS scores among caregivers with different characteristics (age,educational level,married status,current employment,relationship with patients,caregiving time daily,subjective care burden,living with patients,number of caregivers and depression status) (all P ＜ 0.05).Multiple linear regression analysis showed that the Barthel index score of the disabled elderly,the relationship with the elderly,depression status of the caregivers and the subjective care burden were correlated with the social support level of family caregivers (all P ＜0.05);the standard regression coefficients of above significant factors were 0.098,0.190,0.134 and 0.155,respectively.The social support demands of family caregivers were various;the average score was 2.44 ± 0.64,the top three demands were provision of care subsidy for the disabled elderly (average score was 2.95 ± 0.93),provision of care allowance for family caregivers (average score was 2.90 ± 0.93) and the guidance of safe medication (average score was 2.83 ± 0.83).Conclusions Family caregivers for the disabled elderly obtain low level social support in the surveyed area.Since the earegivers have various social support demands,the social support and assistance for them should be specific,effective and comprehensive.

Objective:To establish experimental periodontitis model in Wistar rats by prednisolone acetate injection and ligature of their left second maxillary molars with steel-wire. Methods:Twenty Wistar rats were randomly divided into two groups, control group and experimental group. Muscle injection with saline was regarded as the control group. Prednisolone injection plus ligature of left second maxillary molar with steel-wire was used as the experimental group.The rats were killed after 6 and 8 weeks. Results:The rats in experimental group showed bad appetite and did not want to move after 4 days of injection. These symptoms were agreement with "shen-xu" in traditional Chinese medicine. The osteoporotic changes in alveolar bone, the absorption of alveolar ridge, the formation of periodontal pocket and osteoclastic activity were found in treatment group. None of above pathological changes occurred in periodontal tissue of the control group.Conclusion: Experimental periodontitis model could be successfully established in Wistar rats by ligature with steel-wire plus prednisolone injection, and this animal model offers a good means for the study of periodontitis.

Objective To explore effective ways for community health service institutions to change patients' health service seeking patterns. Methods Yuetan Community Health Service Center of Fuxing Hospital affiliated to Capital Medical University and 9 community health service stations under its subordination in the 1996～2002 period were selected as a representative of the community health service institutions to be studied and intervened while the headquarters of Fuxing Hospital in the same period was selected as a representative of the third-tier hospitals to be studied. A comparison was made between the two in outpatient volume change. Questionnaires were distributed randomly to residents of the Yuetan area where Fuxing Hospital is located in order to study their health service seeking behaviors each year from 1996 to 2002. Results As a result of hard work in the 6 years, Yuetan Community Health Service Center saw a steady increase in outpatient volume whereas the headquarters of Fuxing Hospital witnessed a steady decrease in outpatient volume. Survey via questionnaires sent randomly to permanent residents of the Yuetan area indicated a change in residents' health service seeking patterns. Conclusion It is effective and viable for community health service institutions to change patients' health service seeking patterns through providing social-psychological-biological community medical services, enhancing health education and setting up a two-way referral system with third-tier hospitals.

Objective To discover the common characteristics of award winning medical and health science and technology achievements in Shandong province,and provide a useful reference for the Medical Science Research Management.Methods Statistical analysis was conducted on the 2014 Shandong provincial science and technology award winning projects of medical and health.Results The rate of award winning in Shandong Provincial Science and Technology Award in 2014 was 37.42％,and declared the results of medical and health category winner was 27.91％.While the winners percentage was 35.23％-58.59％ in surrounding eight provinces in the same year.In the awarding group,the innovation points,popularize and applying in scientific and technical achievements,patent for invention,professional inventions,authorized patents within 5 years,SCI publication and its number within 5 years in turn was 3.79,1.25,1.81,1.81,1.83,5.48 and 4.23,respectively.In contrast,the numbers in the non-awarding group was 3.36,0.81,0.86,0.99,0.93,3.40 and 2.76.Conclusions Shandong Provincial Science and Technology Award is very competitive to win and is more difficult for the medical and health class.It is helpful with an original innovation achievement,such as service in-ventions or SCI publications within 5 years.The focus of Medical Science Research Management should be made accordingly adaptation.