Effect of cardiac rehabilitation care after coronary intervention on cardiac function recovery and negative mood in patients with myocardial infarction

BACKGROUND Cardiovascular disease,particularly myocardial infarction(MI)profound impact on patients'quality of life and places a substantial burden on the healthcare and economy systems.Developments in medical technology have led to the emer-gence of coronary intervention as an essential method for treating MI.AIM To assess the effects of cardiac rehabilitation care on cardiac function recovery and negative emotions in MI after coronary intervention.METHODS This study included a total of 180 patients with MI during the period from June 2022 to July 2023.Selected patients were divided into two groups:An observation group,which receiving cardiac rehabilitation care;a control group,which re-ceiving conventional care.By comparing multiple observation indicators such as cardiac function indicators,blood pressure,exercise tolerance,occurrence of adverse cardiac events,and negative emotion scores between the two groups of patients.All the data were analyzed and compared between two groups.RESULTS There were 44 males and 46 females in the observation group with an average age of 36.26±9.88 yr;there were 43 males and 47 females in the control group,with an average age of 40.87±10.5 yr.After receiving the appropriate postoperative nursing measures,the results of the observation group showed significant improvement in several indicators compared with the control group.Indicators of cardiac function,such as left ventricular end-diastolic internal diameter and left ventricular ejection fraction were significantly better in the observation group than in the control group(P<0.05).Exercise endurance assessment showed that the 6-minute walking test distance was significantly increased in the patients of the observation group(P<0.01).In addition,the incidence of adverse cardiac events was significantly lower in the observation group,and negative mood scores were significantly reduced(P<0.05).CONCLUSION Cardiac rehabilitation care after coronary intervention has a significant positive impact on functional recovery.This emphasizes the importance of cardiac rehabilitation care to improve patient recovery.

Impact of continuous care on cardiac function in patients with lung cancer complicated by coronary heart disease

BACKGROUND Despite sharing similar pathogenic factors,cancer and coronary heart disease(CHD)occur in comparable populations at similar ages and possess similar susceptibility factors.Consequently,it is increasingly commonplace for patients to experience the simultaneous occurrence of cancer and CHD,a trend that is steadily rising.AIM To determine the impacts of continuing care on lung cancer patients with CHD following percutaneous coronary intervention(PCI).METHODS There were 94 lung cancer patients with CHD following PCI who were randomly assigned to the intervention group(n=38)and the control group(n=41).In the intervention group,continuing care was provided,while in the control group,routine care was provided.An evaluation of cardiac and pulmonary function,medication compliance,a 6-min walk test,and patient quality of life was performed.RESULTS Differences between the two groups were significant in left ventricular ejection fraction,6-min walk test,oxygen uptake,quality of life and medication compliance(P<0.05).In comparison with the control group,the enhancement in the intervention group was more significant.The intervention group had more patients with high medication compliance than the control group,with a statistically significant difference(P<0.05).CONCLUSION After undergoing PCI,lung patients with CHD could benefit from continued care in terms of cardiac and pulmonary function,medications compliance,and quality of life.

脑电生物反馈联合拉莫三嗪治疗慢性精神分裂症伴迟发性运动障碍患者的临床疗效分析

目的探讨脑电生物反馈联合拉莫三嗪对慢性精神分裂症伴迟发性运动障碍(TD)患者的临床疗效。方法选取2018年6月—2020年6月在杭州市第七人民医院治疗的慢性精神分裂症伴TD患者82例。按照随机表法分为对照组和观察组,每组41例。两组患者维持原有抗精神疾病药物方案。对照组给予拉莫三嗪治疗,观察组在对照组基础上结合脑电生物反馈治疗。比较两组治疗8周后疗效,治疗前与治疗8周后异常不自主运动评定量表(AIMS)、β频段的脑电功率值、简明精神病量表(BPRS)评分和阳性和阴性症状量表(PANSS)评分变化。结果观察组总有效率高于对照组(P <0.05)。观察组治疗前后AIMS评分、BPRS评分及PANSS评分的差值大于对照组(P <0.05)。观察组治疗前后C3、C4、P3和P4点β频段的脑电功率值的差值大于对照组(P <0.05)。结论脑电生物反馈联合拉莫三嗪治疗慢性精神分裂症伴TD患者疗效良好,且可减轻患者迟发性运动障碍。

轴流压气机吸雨特性的数值研究

航空发动机在吞雨工况下的运行安全及稳定性是亟待解决的重要问题。雨水的吸入改变了发动机的工作特性,影响发动机稳定性,为了探究液态水吸入对航空发动机压缩部件性能的影响规律,本文基于CFD软件平台,对单级轴流压气机的吞水过程进行了三维数值模拟研究。研究过程考虑了液滴蒸发、颗粒气动及撞击破碎等方面的影响,分析了不同吸雨工况对压气机性能的影响。结果表明,液态水的吸入可导致压气机流量、压比和效率的降低,且性能恶化程度随着吸雨量的增大而增大;压气机扭矩的增加与吸雨量成正比;液态水的吸入使得吸力面气流分离区域向前缘移动,叶背附面层损失增大,叶栅通流能力降低;大颗粒水滴在单级压气机中的蒸发作用并不显著,蒸发效果对压缩性能影响不大。

涡轮叶片典型交叉肋结构的气热分析

随着燃气轮机技术的不断发展,对叶片冷却技术的要求也越来越高。交叉肋结构不仅冷却效果好,而且可以降低叶片的加工难度和制造成本。因此,对某型涡轮叶片内部前部交叉肋进行数值计算,分析对比不同交叉肋冷却结构的冷却效果,结合肋倾角、肋间距与肋宽之比对综合换热系数的影响,选取冷却效果最好的交叉肋结构。结果表明:肋倾角越小,综合换热效率越大;肋间距与肋宽之比越大,综合换热效率越大;当肋倾角为20°,肋间距与肋宽之比为1.7时,综合换热效果最好,比原结构提高了11.02%。

迷宫密封对悬臂盘-空心转子稳定性影响与改进方法研究

面向某型船用燃气轮机动力涡轮转子,建立了悬臂盘-空心转子的动力学模型并求解其临界转速及振型,探讨了影响临界转速的因素,重点揭示了级间与叶顶迷宫密封对转子稳定性的影响规律,结果表明:迷宫密封对悬臂盘-空心转子的临界转速及振型的影响较小,但迷宫密封引起的气流激振会影响转子的稳定性。通过将迷宫密封改为蜂窝密封或减小迷宫密封进口预旋,都可以提高密封的有效阻尼,进而增强转子稳定性。

高空条件下喷水冷却对压气机性能的影响

为进一步适应高超声速飞行器的动力需求,根据现有燃气轮机循环特性,通过降低涡轮发动机压气机中的气流温度,提升发动机总体性能以适应更高的飞行速度。本文基于两相流动模型,根据进气道总压恢复系数,计算经验公式,求得高马赫数下压气机进口条件,通过模化理论对高空条件下的喷水冷却湿压缩过程进行了数值分析,探索了两相流动对压气机的内部流场及其性能的影响。研究表明:对于同一燃气轮机,通过喷水冷却,可以有效控制压气机压缩过程的温度升高,在25km高空以3.5Mach飞行时温度下降最高可达100K。喷水会改变压气机内部流场。对比发现,喷水后压气机动叶内的激波后移,激波后动叶叶背分离加大,同时由于离心力作用水滴集中在叶尖处,这引起了更大径向分布不均匀性。模拟结果表明,越小的喷雾直径,其湿压缩效果更好。