west china medical publishers
Author
  • Title
  • Author
  • Keyword
  • Abstract
Advance search
Advance search

Search

find Author "许斌" 3 results
  • Numerical simulation and performance analysis of mixed flow blood pump

    The high rotational speed of the axial flow blood pump and flow separation of the centrifugal blood pump are the main causes for blood damage in blood pump. The mixed flow blood pump can effectively alleviate the high rotational speed and the flow separation. Based on this, the purpose of this study is to explore the performance of the mixed blood pump with a closed impeller. A mixed flow blood pump with closed impeller was studied by numerical simulation in this paper. The flow field characteristics and the pressure distribution of this type of blood pump were analyzed. The hydraulic performance of the blood pump and the possible damages to red blood cells were also discussed. At last, pump performance was compared with the mixed flow blood pump with semi-open impeller. The results show that the mixed flow blood pump with close impeller studied in this paper can operate safely and efficiently with a good performance. The pump can reach the pressure head of 100 mmHg at 5 L/min mass flow rate. Flow in the blood pump is uniform and no obvious separation or vortex occurs. Pressure distribution in and on the impeller is uniform and reasonable, which can effectively avoid the thrombosis of blood. The average mean value of hemolysis index is 4.99 × 10−4. The pump has a good biocompatibility. Compared with the mixed flow blood pump with semi-open impeller, the mixed flow blood pump with closed impeller has higher head and efficiency, a smaller mean value of hemolysis index prediction, a better hydraulic performance and the ability to avoid blood damage. The results of this study may provide a basis for the performance evaluation of the closed impeller mixed flow blood pump.

    Release date:2020-06-28 07:05 Export PDF Favorites Scan
  • 胸锁关节疾病二例报告

    目的 总结2例胸锁关节疾病的诊断及治疗,为临床治疗提供参考。 方法 2004年2月及2011年6月收治2例胸锁关节疾病男性患者。年龄分别为61岁及50岁,病程分别为20 d及7 d。胸锁关节非特异性关节炎1例,手术清创后采用重建钢板固定胸锁关节;胸锁关节奇异变形杆菌感染1例,采用脓肿切开引流,局部病灶清除,抗感染及局部换药治疗。 结果 1例胸锁关节非特异性关节炎患者术后随访8个月,切口愈合良好,病变未复发,肩关节活动无明显受限。1例胸锁关节奇异变形杆菌感染患者随访1年,功能恢复良好,病变未复发。 结论 胸锁关节疾病发病率低,疾病类型多样,诊断和治疗有待进一步研究探讨。

    Release date:2016-08-31 04:24 Export PDF Favorites Scan
  • Causal Analysis of HIV Risk Behavior among Male Who Have Sex with Male in a Community

    Objective To explore the key influencing factors of HIV risk behavior among male who have sex with male (MSM). Methods 36 MSM subjects in a community were recruited for HIV risk behavior characteristics, social environment and the attitude of exposure of high risk sexual intercourse, using behavior scales and qualitative research methods. The collected data were orderly input and analyzed using Nvivo 8.0 software. Then, after three-level transcription, the data were further summarized and extracted based on the method of the grouding theory. Results The HIV Risk Assessment Questionnaire score of 36 subjects was 8.08±2.46, of whom, 72% scored at a medium level (5 to 10 scores) and 19% scored at a high level (more than 10 scores). The social support rating scale (SSRS) score was 32.38±5.99 in MSM population, lower than in undergraduates and floating population. The results of qualitative analysis showed that, after open coding, 11 key message and 4 categories contributed to HIV risk in MSM populaiton, including: a) low levels of fear for AIDS; b) male role and uncertain sexual orientation; c) low degree social support; and d) poor availability of condom in the setting of sexual intercourse. Conclusion The interventions against AIDS/HIV for MSM need to be further studied. Besides, we should strengthen the community intervention mode based on fear for AIDS, social support, and condom distribution methods

    Release date: Export PDF Favorites Scan
1 pages Previous 1 Next

Format

Content