共查询到19条相似文献,搜索用时 406 毫秒
1.
相对集成温度传感器而言,负温度系数(NTC)热敏电阻具有温度测量范围广、精度高等优点,本文利用这一特点。结合具有AD转换功能的国产STC12C5410AD单片机,设计一种宽温度监控范围(0℃~200℃)的医用电子电路。 相似文献
2.
《中国医疗器械信息》2004,10(3):i013-i013
AD9883ABST是八Dl公司平板显示器接口系列产品的最新成员。这种新型工业级器件是业界率先推出的可工作在县o℃一 85℃土业温度范围内的全集成模拟接口。: AD9883人BST具有3个高带宽、sbit分辨率、140雾MsPs转换速率的模数转换器(ADc)和一个超低抖动的-锁相环(PLL)(14咖H:频率条 相似文献
3.
目的:探讨围术期保温措施对腹腔镜异位妊娠手术患者体核温度及应激反应的影响。方法:选自2020年1月-2022年8月于本院择期腹腔镜异位妊娠手术患者150例,分为观察组及对照组各75例,分别给予围手术期复合保温措施或常规保温措施。分析两组围术期体核温度、心率(HR)、血压、凝血功能指标及血清肾上腺素(AD)和去甲肾上腺素(NE)水平。结果:观察组体核温度麻醉1h(36.17±0.78℃)及手术结束时(36.13±0.82℃)均大于对照组(35.01±0.82℃、34.87±0.84℃),术中HR(71.4±7.5次/min)、收缩压(126.6±10.1 mmHg)及舒张压(72.9±7.9 mmHg)、凝血功能指标、AD(104.62±20.55 pmol/L)、NE(160.77±37.03 pmol/L)及气管拔管时间(27.29±6.90 min)及麻醉苏醒时间(36.52±7.13 min)均低于对照组(79.5±8.9次/min、141.8±19.1 mmHg、84.0±9.4 mmHg、119.43±31.91 pmol/L、179.38±41.22 pmol/L、25.9... 相似文献
4.
5.
采用AD590K双腿集成电路温度传感器进行大范围温度检测,用AD570S对传感器的输出进行数字量化(8bit),实现对温度大范围的数字化检测,具有大动态、高精度、体积小、高可靠等优点。 相似文献
6.
7.
《中国城乡企业卫生》2016,(5)
目的探讨血清高密度脂蛋白(HDL)水平与老年痴呆发病风险的相关性。方法通过检索相关的文献,通过Meta分析的方法定量整合研究结果,综合评估血清HDL与阿尔茨海默病(AD)和血管性痴呆(VaD)发病的相关性。结果 AD组的血清HDL浓度与健康人群对照组间具有显著的差异性,健康人群具有较高的血清HDL浓度,较低浓度的血清HDL与最高浓度血清HDL间,AD发病风险具有显著差异性。结论血清HDL与AD的发病风险具有相关性,健康人群的血清HDL浓度高于AD/VaD组,本项研究可为血清HDL作为AD和VaD潜在的治疗靶点提供理论依据。 相似文献
8.
9.
<正>主动脉壁内血肿(aortic intramural hematoma,AIH)是指血管壁中层发生血肿的主动脉夹层(aortic dissection,AD),没有内膜的破裂口,没有主动脉夹层的内膜片,无真假两腔,不与主动脉腔相连通[1]。AIH为AD的一种特殊变异,是AD的一种早期状态或先兆,发生率约占AD总数的10.0%~12.8%,最终多会进展为AD,同样具有破裂的倾向。近年来,AIH发 相似文献
10.
目的了解上海市嘉定区儿童特应性皮炎(AD)的患病率及影响儿童AD的家庭和家居环境因素。方法采用随机整群抽样法,于2011年4—5月对嘉定区某社区3所小学的4 784名6~12岁儿童进行横断面流行病学调查,分析儿童AD与家居环境因素的相关性。结果上海市嘉定区6~12岁儿童AD的患病率为10.9%,男性和女性儿童的患病率差异具有统计学意义(分别为12.2%和9.9%,P=0.02)。经多因素Logistic逐步回归分析显示,随着年龄的增长,儿童AD的患病率呈下降趋势(P<0.05,OR<1)。父母过敏疾病史、父母文化程度、孕期母亲吸烟暴露(主动吸烟或被动吸烟)、儿童出生前母亲居住过新装修的房屋与儿童AD呈正相关(P<0.05,OR>1)。结论父母具有过敏疾病史、较高的文化程度、孕期母亲吸烟暴露和孕期及孕期前一年居住新装修的房屋可能是上海某区儿童AD患病的危险因素。 相似文献
11.
介绍一种以崭新思路设计的恒温控制器。该控制器安装了性能可靠、热容量小的金属热电偶作为温度传感器 ,并配以专用集成电路AD595C ,从而提高了控制器的可靠性和对温度的测控精度。同时采用了特殊设计及制作工艺 ,大大减小了控制器对高灵敏度记录仪器的干扰。 相似文献
12.
13.
目的 探讨早产儿高胆红素血症暖箱内双面蓝光治疗时体温变化及箱温调控方式,以维持病儿蓝光治疗期间所需体温的恒定水平.方法 选取2014年8月至2015年8月衢州市人民医院收治的高胆红素血症早产儿80例,随机将其分成观察组和对照组,观察组在蓝光治疗前测量体温1次,当体温<36.5℃时降低暖箱温度1.5℃;体温在36.5℃~37.5℃,降低箱温2.0℃;对照组在蓝光治疗前测体温<36.5℃,降低箱温0.5℃,体温在36.5℃~37.5℃之间,降低箱温1℃,观察两组在蓝光治疗期间体温状况.结果 观察组体温上升幅度为(37.0±0.3)℃,明显低于对照组的(37.5±0.3)℃,差异具有统计学意义(t=7.96,P<0.05);观察组发热的发生率为12.5%,低于对照组的62.5%,差异具有统计学意义(χ2=22.78,P<0.05).结论 早产儿在进行双面蓝光治疗时,根据蓝光治疗前测量的体温调控适宜的箱温,可有效降低早产儿光疗时发热的发生率. 相似文献
14.
Qian‐Wen Xie Cecilia Lai‐wai Chan Celia Hoi‐yan Chan 《Health & social care in the community》2020,28(3):862-873
Atopic dermatitis (AD) imposes significant physical and psychosocial burdens on affected children. However, little has been done to learn from the subjective experiences, perspectives and emotions of children living with AD. Their voices are not heard in healthcare settings. This study aims to share these children's voices and provide a deep understanding of the subjective experiences of children living with AD. We conducted qualitative research by conducting semi‐structured interviews and analysing the drawings of 17 children in Hong Kong aged between 8 and 12 years who were diagnosed with AD. Using a phenomenological approach, we transcribed, coded and described the interviews. We found that for the children in this study, living with AD meant contending with an accumulation of challenges and crises. At the individual level, the essential experience of living with AD manifested a vicious cycle of skin and mental issues. At the family level, conflicts between children and parents concerning AD management coexisted with parental support. The children commonly experienced bullying and isolation in school and discrimination and stigmatisation in their neighbourhood, thereby making living with AD a traumatic experience. The synergy between individual and environmental factors contributed to shaping an incapable and wounded “self” living with AD. Based on our findings, we propose a child‐centred biopsychosocial framework for understanding the living experiences of children with AD. This study suggests different practice strategies for healthcare professionals working with the individual challenges experienced by children living with AD and the challenges these children experience in their family, school, and neighbourhood. The needs of these children should be addressed through an integrated, holistic approach for improving their long‐term health outcomes. 相似文献
15.
实验结果表明,人体出现冷感的气温,安静坐位为5℃,蹬车运动为- 5℃;手指血流图和耳垂脉搏波产生显著变化的环境温度,静坐为5℃,运动为-5℃;肢体皮肤温度出现显著变化的环境温度,于静坐和运动状态分别是气温0℃和-5℃;裸露部位皮肤温度发生明显变化的气温界限静坐和运动均为10℃;手操作功能出现显著变化的环境温度静坐为5℃,运动为-5℃或-10℃。兔血中IgA含量测定亦表明,机体免疫功能发生明显改变的温度界限是5℃,与人体实验结果类似。根据劳动时间率和环境温度,提出了低温作业分级标准。 相似文献
16.
目的探讨应用HockeyStick回归和时间序列分析中的SARIMA模型进行细菌性痢疾疫情预测的可行性。方法收集辽宁省葫芦岛市1990—2006年的逐月及逐年细菌性痢疾疫情资料和当地气象数据。首先,利用描述统计分析细菌性痢疾季节性发病规律,使用Spearman等级相关分析疫情同气象因素的关系,根据HockeyStick回归确定发病阈值。其次,进行扩充迪基富勒的平稳性单位根检验。再次,根据自相关函数图和偏自相关函数图识别逐月疫情间的相关性。应用Eviews3.1、Stata8.2和SPSS12.0软件对1990—2005年逐月发病率进行上述统计分析。最后,利用所得到的模型对2006年各月发病率进行预测,并与实际发病率进行比较。结果最低气温、平均气温和最高气温所确定的阈值分别为11.42℃、17.17℃和22.98℃;(1,0,0)×(0,1,1)12模型为最优SARIMA模型,此模型对2006年各月发病率的预测值符合实际发病率变动趋势。结论HockeyStick回归和SARIMA模型可较好地模拟细菌性痢疾疫情在时间序列上的变动趋势,并对未来的发病率进行一定预测,能够为传染病防制工作提供一定决策支持。 相似文献
17.
Burcu F. Darst Qiongshi Lu Sterling C. Johnson Corinne D. Engelman 《Genetic epidemiology》2019,43(6):657-674
Although Alzheimer's disease (AD) is highly heritable, genetic variants are known to be associated with AD only explain a small proportion of its heritability. Genetic factors may only convey disease risk in individuals with certain environmental exposures, suggesting that a multiomics approach could reveal underlying mechanisms contributing to complex traits, such as AD. We developed an integrated network to investigate relationships between metabolomics, genomics, and AD risk factors using Wisconsin Registry for Alzheimer's Prevention participants. Analyses included 1,111 non-Hispanic Caucasian participants with whole blood expression for 11,376 genes (imputed from dense genome-wide genotyping), 1,097 fasting plasma metabolites, and 17 AD risk factors. A subset of 155 individuals also had 364 fastings cerebral spinal fluid (CSF) metabolites. After adjusting each of these 12,854 variables for potential confounders, we developed an undirected graphical network, representing all significant pairwise correlations upon adjusting for multiple testing. There were many instances of genes being indirectly linked to AD risk factors through metabolites, suggesting that genes may influence AD risk through particular metabolites. Follow-up analyses suggested that glycine mediates the relationship between carbamoyl-phosphate synthase 1 and measures of cardiovascular and diabetes risk, including body mass index, waist–hip ratio, inflammation, and insulin resistance. Further, 38 CSF metabolites explained more than 60% of the variance of CSF levels of tau, a detrimental protein that accumulates in the brain of AD patients and is necessary for its diagnosis. These results further our understanding of underlying mechanisms contributing to AD risk while demonstrating the utility of generating and integrating multiple omics data types. 相似文献
18.
目的:了解家用、商用冰箱和医用药品冷藏箱的差异,分析原因。方法:从标准、技术要求等方面分析不同冰箱的差别,并用6个温度芯片,在相同的工况下,通过连续24小时监测商用冰箱和医用药品冷藏箱温度做对比实验,对6组数据进行统计分析。结果:医用药品冷藏箱箱内各点温度始终保持在2 C~6 C,箱内温度波动性、均匀性、稳定性明显优于商用冰箱;商用冰箱温度范围0.5 C~7 C,箱内出现低于2.0 C的比例20.8%,其中出现0.5 C的比例达到8.3%,累计时间2小时。结论:家用、商用冰箱贮存试剂、标本、血液制品存在安全隐患。 相似文献