共查询到18条相似文献,搜索用时 203 毫秒
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国产小型医用氧气机变压吸附控制系统的可靠性探讨 总被引:2,自引:0,他引:2
采用变压吸附气体分离技术生产的小型医用氧气机 ,其变压吸附控制系统的可靠性是整机制氧的关键。如果控制系统出现控制换向失败 ,小型医用制氧机则不能制氧。我国国内生产变压吸附小型医用氧气机的控制系统主要的可以分为六种类型 ,就其控制的可靠性作分析探讨。 相似文献
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变压吸附制取医用氧技术的研究 总被引:2,自引:0,他引:2
朱学军 《中国医疗器械杂志》1999,23(5):272-273
对变压吸附制医用氧过程中的吸附剂选择、流程开发、多层过滤系统等技术问题进行了研究,它将有助于变压吸附制氧技术在我国各级医院中的使用。 相似文献
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目的:为研制变海拔工况的携运行变压吸附式(pressure swing absorption,PSA)医用制氧设备提供技术支持。方法:基于PSA制氧原理,分析海拔高度变化对PSA医用制氧设备作业能力的影响,应用变频恒压进气方法,研究海拔高度自适应PSA制氧技术,探讨应用变频器之后所带来的关键技术问题,提出相应的解决措施,并以1.2 Nm3/h箱式PSA制氧机为例进行验证。结果:应用该技术的PSA医用制氧设备在0~4 451 m海拔范围内运行时其作业能力符合医用分子筛制氧机相关标准要求。结论:该技术可明显提高PSA医用制氧设备在高原地区应用的海拔高度。 相似文献
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不同海拔高度对医用PSA制氧机特性影响的试验研究 总被引:1,自引:1,他引:0
目的:提高车辆驾驶员医用PSA制氧机在高原地区的适应性、可靠性寻求依据。方法:利用高原人工(低气压)环境PSA制氧系统性能模拟试验台,模拟试验研究了医用PSA制氧机在不同海拔高度、不同氧流量、不同温度和不同氧体积分数滞后时间等与氧体积分数的相互关系及影响,并模拟对比试验了与青藏线5个典型地域不同海拔高度实地自然环境条件下制氧体积分数和进气增压前后制氧性能变化规律。结果:随海拔升高,大气压力下降,分子筛PSA制氧系统供气压力增大时出口氧体积分数值增大,反之减小。同时随氧流量的增加对PSA制氧体积分数下降比较明显。结论:氧体积分数模拟与实地对比对PSA制氧系统的影响及变化规律基本一致。 相似文献
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分子筛变压吸附制氧技术近年来广泛应用于大、中型医院,实现了医院制氧供氧的自主性,其制氧设备工作性能直接影响对患者的抢救和治疗。通过对YSPO93-50型分子筛变压吸附制氧机在工作过程中出现的空压机短暂停机故障现象的分析,从制氧机工作原理、结构入手,逐步排除,最终确定其故障为CPU软故障导致设备不能正常工作。 相似文献
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随着医院住院病人量逐年上升,对氧气的需求量不断加大。本文对液氧储槽和变压吸附(Pressure Swing Adsorption,PSA)制氧系统供氧的特点、经济性、气体质量和气体利用率、安全性等特点进行对比,分析了液氧储槽供氧和PSA制氧系统供氧的运行成本及效益。 相似文献
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对微型变压吸附制氧的工艺流程、能耗、噪声以及控制系统进行了深入研究。目前微型变压吸附制氧有无均压、进气均压、出气均压3种工艺流程,其中有均压流程能耗较低、制氧效果较好。由于技术水平等原因,国内各厂家生产的微型变压吸附制氧机在能耗噪声等方面与国外产品相比存在一定差距,需要进一步提高技术水平。控制系统决定着整机的性能,因此,研究性能稳定的控制系统,对微型变压吸附制氧尤其重要。 相似文献
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针对数字化医院综合布线系统的特点,阐述了综合布线系统的定义、优越性和数字化医院综合布线系统的设计原则。从工程实现的角度给出数字化医院综合布线系统实现的技术途径,并对千兆网的设计原则作了重点介绍。通过对数字化医院综合布线系统的设计、结构与施工各环节的探讨,为医院信息集成、智能化办公和医疗服务提供可行性方案。实践证明该设计能满足千兆网应用的需求,而且还可以适应更高速网络应用的需要,真正体现综合布线系统易于扩展、高度的设备独立性和保护用户投资的特点。 相似文献
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Paul K. J. Han Sarah Kobrin Nancy Breen Djenaba A. Joseph Jun Li Dominick L. Frosch Carrie N. Klabunde 《Annals of family medicine》2013,11(4):306-314
PURPOSE
Recent clinical practice guidelines on prostate cancer screening using the prostate-specific antigen (PSA) test (PSA screening) have recommended that clinicians practice shared decision making—a process involving clinician-patient discussion of the pros, cons, and uncertainties of screening. We undertook a study to determine the prevalence of shared decision making in both PSA screening and nonscreening, as well as patient characteristics associated with shared decision making.METHODS
A nationally representative sample of 3,427 men aged 50 to 74 years participating in the 2010 National Health Interview Survey responded to questions on the extent of shared decision making (past physician-patient discussion of advantages, disadvantages, and scientific uncertainty associated with PSA screening), PSA screening intensity (tests in past 5 years), and sociodemographic and health-related characteristics.RESULTS
Nearly two-thirds (64.3%) of men reported no past physician-patient discussion of advantages, disadvantages, or scientific uncertainty (no shared decision making); 27.8% reported discussion of 1 to 2 elements only (partial shared decision making); 8.0% reported discussion of all 3 elements (full shared decision making). Nearly one-half (44.2%) reported no PSA screening, 27.8% reported low-intensity (less-than-annual) screening, and 25.1% reported high-intensity (nearly annual) screening. Absence of shared decision making was more prevalent in men who were not screened; 88% (95% CI, 86.2%–90.1%) of nonscreened men reported no shared decision making compared with 39% (95% CI, 35.0%–43.3%) of men undergoing high-intensity screening. Extent of shared decision making was associated with black race, Hispanic ethnicity, higher education, health insurance, and physician recommendation. Screening intensity was associated with older age, higher education, usual source of medical care, and physician recommendation, as well as with partial vs no or full shared decision making.CONCLUSIONS
Most US men report little shared decision making in PSA screening, and the lack of shared decision making is more prevalent in nonscreened than in screened men. Screening intensity is greatest with partial shared decision making, and different elements of shared decision making are associated with distinct patient characteristics. Shared decision making needs to be improved in decisions for and against PSA screening. 相似文献17.
Yongling Li Yingshu Liu 《International journal of occupational and environmental health》2014,20(3):207-214