BACKGROUND: Mimic pulsatile flow system is the optimal device to assess the hydrodynamic performance of mechanical valvular prostheses, but few studies concern about the performance of mimic pulsatile flow system and the effect of mimic cardiac ventricle driving curve on hydrodynamic performance of mechanical valvular prostheses. OBJECTIVE: To research the effect of cardiac ventricle driving curve on the hydrodynamic performance of mechanical valvular prostheses under physiological condition DESIGN, TIME AND SETTING: This study, a control observation, was carried out in the Hydrodynamics Laboratory,Biomedical Engineering Center, College of Architecture and Environment, Sichuan University (Chengdu, Sichuan, China)from April 1999 to February 2000.MATERIALS: Mimic pulsatile flow system was adopted, with the mimic cardiac output at 4 L per minute and heart rate at75 beats per minute. METHODS: The mimic puisatile flow system was implanted with 25 nun Carbo Medics bileaflet prosthesis into the aortic valve position, with 27 mm Bj(o)rk-Shiley tilting disc prosthesis into the mitral valve position. Standard cardiac ventricle driving curve was employed to test the system parameters and maintain the aortic pressure at 16.0/10.7 kPa (120/80 mm Hg).Experimental liquid was a mixtrue of saline and glycerine, at a viscosity of 3.5noa·s(3.5Cp)and a density of 1.06g/cm3.The mimic flow system kept at an unchanged level of ventricular end diastolic volume, aorta arterial compliance, peripheral resistance and peripheral compliance. The coordinate on several points of standard cardiac ventricle driving curve was modified to define 4 control curves, followed by a series of procedures, such as automatic interpolation, fitting, waveform smoothing and filtering. The hydrodynamic performance of each controlled curve was also tested. MAIN OUTCOME MEASURES: The mean transvaivular pressure gradient, effective orifice area, closing volume and leakage volume of mechanical valvular prostheses were evaluated in five cardiac ventricle driving curves.RESULTS: The cardiac ventricle driving curves developed morphological changes within physiological conditions,subsequently induced a 2.9% variance of mean transvalvular pressure gradient, 1.5% variance of effective orifice area, 6.6%variance of closing volume and 3.6% variance of leakage volume.CONCLUSION: The cardiac ventricle driving curve has a certain effect on the hydrodynamic performance of mechanical valvular prosthesis, thereby leads to an adverse effect on the objectivity and comparability of the hydrodynamic evaluation.

Objective To understand the current status of nursing patentable invention.Methods The patent literature published in nursing journals from 2010 to 2013 were analyzed to obtain related information.Results The results show an increasing trend in the number of patents of patient care;patent inventor distributed in 25 provinces and municipalities, mainly level 3 hospitals (89.86％), nurses with undergraduate degree (76.76％) and senior nurses (50.28％).The patents focused on the life care appliances (such as improved disease clothing, toilet equipments, the cleaning utensils, cutlery improvement, etc.), infusion, injection therapy appliance (such as infusion sets, syringes, dosing auxiliary device, infusion fixtures, etc.), airway care paraphernalia, washing, and drainage equipments, etc.Of all the nursing patents, utility model patents accounted for majority, and only 3 of them were invention patents.Conclusions The trend of nursing patentable invention show good momentum, but the quality needs to be improved.The innovation training for nurses is necessary;and it is also important to increase support to establish an innovation environment.

Objective To identify main factors affecting the research capacity of nursing staff for efficient elevation of such a capacity. Methods 1000 persons were chosen in a random coded sampling for completion of questionnaires, including a general information questionnaire, research capacity self-assessment questionnaire, nursing professional value scale and work satisfaction scale for nursing staff. Results Main factors for the research capacity range from high to low the following: education, work satisfaction, training involvement, cognitive value, and nature of their employer. Beta values of such factors are found to be 0. 323, 0. 234, 0. 182,0. 064, and 0. 062 respectively. Conclusion Administrators of nursing staff need to focus on the development of the work values and satisfaction of nursing staff, on top of developing their research methodology and knowledge. This approach may encourage them to proactively involve in research activities.

Objective To investigate the habits that literatures using by nursing staffs during 2010 to 2012 in China.Methods The publication from Chinese Journal of Nursing, Nursing Research, Chinese Journal of Practical Nursing, Journal of Nurses Training and Journal of Nursing Science from year of 2010 to 2012 were statistically analyzed using literature metrology method.The statistics results were compared with data from 2007 to 2009.Results In past 3 years, the quantity,quantity of papers with citations, average number of citations, citations of theses with citations published in-mentioned above five periodicals increased year by year.In 2010 to 2012, the average number of citations and citations rate of papers also improved compared with 2007 to 2009.The type citation is mainly from Journals,and the language was mainly in Chinese.Conclusions In the past 3 years, the nursing staff's literature utilization was improved.However, in the situation of using references with foreign language, nursing staff was poor comparing with medical personnel.On the scientific research ability of nursing personnel training should be strengthened,and the application of new technology and new theory in domestic and international should be strengthened as well..

Objective To learn the publications and influencing factors of scientific papers from nursing staff in China.Methods 750 authors were chosen in a stratified random sampling for survey,and the questionnaires included a survey form on nursing research papers publications and one research ability self-rating scalce Results The nursing staff surveyed published 1-70 papers per person,averaging 8.83papers per person; on average 0.45 papers were published per person per year.Main factors for research outputs range from high to low as follows:age,academic titles,research ability,education background and research training,with the Beta values of 0.255,0.234,0.142,0.093,and 0.087 respectively.Conclusion Nursing administrators need to develop respective objectives for nursing staff of different age,academic titles,education background and research ability,and set up an effective incentive mechanism to ignite the enthusiasm of scientific research.

Objective To analyse the research motives and its influencing factors of nursing staff.Methods 1000 authors who wrote for “Nursing Research” were chosen with a random code sampling method and were surveyed with a questionnaire,which inquired about their research motivation and self-rated research ability scale.Results Nursing research motives include to summarise clinical experience66.2％ (524/793),to get promotion 55.4％ (420/793),to contribute to nursing profession 37.2％ (295/793),to report research achievements 35.6％ (282/793),and to meet the requirements of the institution17.5％ (139/793).Research motives were statistically different in terms of age,work expirence,educational background,professional title,attitude,research training,research ability,and work institution (P =0.013,0.037,0.048,0.002,0.024,0.008,0.005,0.009,0.004,P＜0.05).Conclusions To stimulate the enthusiasm for research in nursing staff,administrators need to pay great attention to higher education for nurses,enhance their research training,provide research platform,and to improve the incentive system.

BACKGROUND:Hereditary factor occupies a certain position in suicidal behavior of depression. The researches in the past are focused on the hereditary effect on bipolar depression suicide.How do hereditary patterns and effects work in suicidal behavior in unipolar depression?OBJECTIVE: To probe into hereditary patterns and effects on suicidal behavior in unipolar depression.DESIGN:Retrospective investigation.SETTING:A municipal psychiatric hygienic centerPARTICIPANTS:Unipolar depression group included 115 outpatients and inpatients diagnosed in Wuxi Psychiatric Hygienic Center from June 1st 1983 to May 31st 2002.The diagnosis tallied with Standards on Depression Onset in Categories and Diagnostic Standards on Psychiatric Disturbance in China of 3rd Edition and with Standards on Severe Depression Onset in Manual of Diagnosis and Statistics of Psychiatric Disturbance in America of 4th Edition.The attack frequency of all the cases ≥ 3 times or the cases had been relieved ≥8 years after a couple of attacks.METHODS:The patients who tallied with the standards on unipolar depression received the investigation in every family tree under the instruction of 2 physicians-in-charge and more than 2 physicians and filled up the self-made investigation form of psychiatric family tree,including mainly the data of social demography of patients and their first grade relatives,characters of disease onset,frequency of attack,history of treatment and suicide. After re-diagnosed by 2 physicians-incharge and more than 2 physicians and checked by one physician-incharge,the cases were collected in patient group. The interview was carried on for the patients with suicidal behavior among all of the survived patients (107 cases) and first grade relatives (14 cases).The interview (337 cases) and investigation with letter (380 cases) were carried on for the first grade relatives without suicidal behavior. The investigation forms of 13 dead cases (8 cases of patients, 5 cases of first-grade relatives) were provided and filled-up by one or two first grade relatives. Two researchers interviewed the cases in the control,inquired the first grade relatives and filled up the investigation form of family tree.Single factor analysis was used for all the data and Falconer pattern of polygenetic threshold-value theory was used to estimate hereditary rate and standard error in suicidal behavior.Separation analysis in medical hereditary mathematic method and polygenetic threshold-value theory were applied to discuss the hereditary patterns.MAIN OUTCOME MEASURES:Hereditary effects and patterns of suicidal behavior in unipolar depressed patients.RESULTS:Suicidal risk of unipolar depressed patients(51.30%,59/115)was higher than their first grade relatives (2.58%,19/736) (x2=283.16,P ＜ 0.01).Suicidal risk of the first grade relatives (2.58%,19/736) of unipolar depressed patients was higher than the control (0.12%,3/2469)(x2=50.36,P ＜ 0.01).Suicidal risk of the first grade relatives of the patients with suicidal behavior (3.8%,14/372) was higher than that of the first grade relatives of the patients without suicidal behavior (1.4%,5/363)(x2=4.14,P＜ 0.05).The weighted average hereditary rate and standard error was (70.16±0.79)% for suicidal behavior in unipolar depression.The predictive morbidity of suicidal behavior in the first grade relatives was 3.1% and the real morbidity was 2.6%,which did not indicate significant difference (u =0.766, P ＞ 0.05).CONCLUSION:Suicidal behavior of unipolar depression presents obvious hereditary effects and its hereditary patterns tally with polygenetic inheritance.

Objective To explore the effect of two different urethral stent flush methods for postoperative complications of hypospadias repair in children patients. Methods A total of 182 cases of children patients who underwent urethroplasty with pedicled double skin flaps from March 2014 to March 2016 were divided into intervention group (n=89) and the control group (n=93) by using random number method. The control group was treated with gentamicin irrigation urethral stent;the intervention group was treated with gentamicin irrigation urethral stent, and the patients were trained to urinate twice with the stent from the fourth day after surgery. The incidence of urinary fistula and urethral stricture within one year after surgery, and the anxiety level of patients' caregivers were assessed. Results The incidence of urinary fistula in the intervention group and the control group were 5.7％(5/87) vs. 15.2％(14/92), and the difference was statistically significant(χ2=4.227, P<0.05). In the intervention group, the cases of non anxiety, mild anxiety, moderate anxiety and severe anxiety respectively were 33(37.9％), 42(48.3％), 8 (9.2％) and 4(4.6％). However, in the control group the cases were 21(22.8％), 46(50.0％), 12(13.0％), 13 (14.1％) respectively. The anxiety degree of patients' caregivers was significantly different between intervention group and control group (Z=2.757, P<0.01). Conclusions The training of early micturition with stent after hypospadias surgery can significantly reduce the incidence of urinary fistula and the anxiety level of caregivers.

Objective To explore the zero cited fund papers in clinical nursing in China,in order to provide evidence for improving the academic quality and cite rate of nursing papers.Methods Bibliometric statistical analysis was used to summarize zero cited papers published in 12 nursing core journals from 2012 to 2014.Indicators collected including the distribution of time,journals,funding number,funding sources,research methods,research design type,statistics method,number of cooperative people,nature of the authors' organizations,as well as the conditions of cited papers and the distribution of themes.Results The overall zero cited rate of clinical nursing zero cited fund papers was 74.64％.Affiliated hospital of colleges account for a large proportion of 42.53％,and the zero cited rate in the national disease research center and the affiliated hospital of army colleges was the highest (100.00％ and 80.52％).The oncology nursing,disease and symptoms care proportion was 13.94％ and 23.10％.The output of TCM care and rehabilitation care fund paper accounted only 3 and 8 respectively,and none was cited.The zero cited rates of social support,care coordination,treatment and care attitude and evidence-based research were 96.3％,94.12％,91.67％,90.32％.Strengthened their awareness of research applications,managers focused on research papers in the number of outputs at the same time and paid attention to the paper quality,and promoted scientific research into nursing,and promoted the development of nursing discipline.Conclusions The current paper-citing situation in clinical nursing was not optimistic,nursing research personnel should correct the attitude of scientific research,strengthen their own sense of scientific achievement applications.The management personnel should pay more attention to the paper quality,and promote nursing research outcome transformation,promote the development of nursing discipline.

Objective Analyze the distribution of high-cited papers on nursing management from 2015 to 2017,understand the research hotspots of nursing management in recent years,provide further reference for nurses to conduct research in this field in the future.Methods Bibliometrics method and visualization techniques were used to analyze the distribution of journals,fund support,thematic distribution,regional distribution of nursing management highly cited papers published in 12 nursing core journals.Results There were 422 highly cited papers in nursing management from 2015 to 2017,and the total cited frequency was 4 709 times,and the average cited frequency was 11.16 times.Among them,187 papers were funded,and the frequency of citation is 11.63 times.There are 235 non-fund articles,and the average frequency of citation is 10.79 times.The highest number of highly cited papers published in the "Nursing Research" was 63,followed by 61 articles in the “Chinese Journal of Nursing” and the “Journal of Nursing Science”.The research focuses on nursing human resource management,nursing quality management,nursing safety management and so on.The high cited papers were funded by provincial (municipality)level,and the average fund paper ratio was 44.31％.The authors are distributed in 28 regions.Conclusions Nursing personnel caught the attention of the hot spots of clinical research and paid attention to teamwork,which played an active role in promoting the overall level of nursing management.