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1.
潘静  黄辉  李招权  蒲晓允 《重庆医学》2006,35(17):1557-1559
目的 建立一种可以用于免疫分析的微流控芯片系统。方法 采用激光直接加工法制备微流控芯片,建立由流体控制系统、免疫反应系统和信号处理系统构成的芯片系统,用免疫竞争法测定总T3。结果 芯片系统可以在20min内完成总T3的分析,所需要的标本量和试剂量为5μl。线性范围为1~10ng/ml,批内CV平均为7.2%。批间CV平均为10.7%,回收率为108.5%。结论 微流控芯片系统用于检测总T3具有快速、灵敏、稳定、可重复使用的特点。  相似文献   

2.
杨帆  蒲晓允 《重庆医学》2007,36(10):903-905
目的建立一种可将免疫反应原理与化学发光技术相结合的微流控芯片系统。方法采用激光直接加工法制备微流控芯片,用双抗夹心法测定TSH。结果芯片系统可以在25min内完成TSH的检测流程,所需的标本和抗体试剂量为10μl,线性范围为0-50μIU/ml,批内CV平均为4.7%,批间CV平均为4.6%,平均回收率为95.3%。结论用于检测TSH的微流控芯片系统灵敏、快速、操作简便、可重复使用。  相似文献   

3.
目的:建立一种可用于免疫分析的微流控芯片系统。方法:采用激光直接加工法制备微流控芯片,建立基于超顺磁珠的化学发光微流控免疫分析系统,用于甲胎蛋白(AFP)的测定。结果:芯片系统可在20min内完成AFP的分析,所需要的标本量和试剂量为5μl,线性范围为1~800ng/ml,批内变异系数(CV)平均为6,3%,批间CV平均为7.8%,回收率为94.3%。结论:微流控芯片系统是一种快速、耗费小、可重复使用的AFP测定方法。  相似文献   

4.
潘静  黄辉  郑小林  黄敏  蒲晓允 《重庆医学》2006,35(6):510-512
目的建立一种可以用于免疫分析的微流控芯片系统。方法采用激光直接加工法制备微流控芯片,建立由流体拉制系统、免疫反应系统和信号处理系统构成的芯片系统,用于甲胎蛋白的测定。结果芯片系统可以在20min内完成AFP的分析,所需要的标本量和试荆量为5μl,线性范围为1-800ng/ml,批内CV平均为4.8%,批间CV平均为7.0%,回收率为96.3%。结论微流控芯片系统是一种快速、耗费小、可重复使用的AFP测定方法。  相似文献   

5.
目的 评价化学发光免疫分析法检测黄体生成素和癌胚抗原的性能。方法 通过对不同浓度样品黄体生成素(LH)、癌胚抗原(CEA)含量的测定,进行精密度、灵敏度、干扰、回收试验。结果 批内CV均小于5%,批间CV均小于6.5%;LH、CEA回收率分别为97.9%~102.2%、98.9%~102.4%,灵敏度分别达到2,4IU/L、2.6ng/ml;无吸样间的交叉污染。结论 该方法各项指标结果准确,精密度好、灵敏度高、干扰小,具有广泛的应用前景。  相似文献   

6.
目的 对特种蛋白分析仪测定尿微量白蛋白进行实验研究。方法 通过ARRAY360全自动免疫速率散射浊度测定系统对尿微量白蛋白测定并进行方法学评价。结果 本测定方法性能良好。线性范围为2-40mg/L,最大分析范围可达到8640mg/L,平均回收率为99.9%,低值批内变异系数(CV)为1.8%,批间CV为2.8%;高值批内CV为2.6%,批间CV为4.8%。结论 结合胆红素、血红蛋白、脂类、肌酐干扰小。与放射免疫法(RIA)比较有良好的相关性(r=0.999),试剂稳定。抗原过量自动检查及样本超出范围时自动稀释重复检测,加上微电脑的控制,使该实验方法可靠,测定更快速,操作更简便。  相似文献   

7.
目的探讨偶氮胂Ⅲ比色法测定血清镁实验的性能。方法在日立7180型全自动生化分析仪上分别作准确度、灵敏度、精密度、线性范围、回收试验、干扰试验、试剂稳定性等测试。结果准确度测试平均偏倚为1.01%,镁浓度在0.031和3.12mmol/L时光密度分别为0.0099和0.9703,线性在0~3.12mmol/L范围内线性良好,批内、批间CV分别为2.11%和3.15%,平均回收率为99.8%,钙、重金属、蛋白质、胆红素未对本试验造成干扰,甘油三酯及溶血标本存在线性关系的正干扰,同一瓶试剂经20d测试其平均CV为3.4%。结论偶氮胂Ⅲ法测定镁实验的性能良好,较适合常规测试使用,适宜自动化分析。  相似文献   

8.
目的:比较时间分辨荧光免疫法(TRFIA)、微粒子化学发光法(CLA)、放射免疫法(RIA)和酶免疫法(EIA)四种方法检测甲胎蛋白(AFP)的线性、重复性、准确性和对比试验。方法:用不同浓度AFP分别进行了线性、精密度和回收试验。结果:TRFIA、CLA、RIA、和EIA四种方法的线性范围分别为1~1000ng/ml,1~1000ng/ml,10~400ng/ml和10—300ng;平均批内CV分别为3.75%、2.88%、5.08%和6.78%:平均批间CV分别为4.56%、3.45%、5.88%和7.72%;平均回收率分别为96.8%、97.1%、95.4%和92.6%。对比试验为TRFIA与CLA的相关系数r=0.991.TRFIA与RIA的相关系数r=0.963、TRFIA与EIA的相关系数r=0.843。结论:TR—FIA法和CLA法是目前检测AFP理想的定量方法。  相似文献   

9.
目的本文对胶乳增强免疫透射比浊法定量测定抗“O”进行方法学评价。方法定量测定抗“O”,并对其线性范围、重复性、相关性实验、干扰实验及试剂稳定性加以评价。结果线性范围为20—800U/ml;高、中、低三种浓度的抗“O”批内CV分别为1.74%、1.87%、1.96%;批间CV分别为2.1%、2.92%、3.52%;平均回收率为99.85%。结论胶乳增强免疫透射比浊法定量测定血清中抗“O”含量,其线性范围宽、重复性好、特异性高、干扰小、操作简便快速,具有较高的临床应用价值。  相似文献   

10.
快速消除溶血干扰检测血尿酸的方法   总被引:1,自引:0,他引:1  
本文介绍用两点比色法替代终点比色法快速消除溶血干扰检测血尿酸的方法。经实验,样品与试剂之比以1:20为宜,对于非溶血标本两种方法的相关系数r=0.99,对于溶血标本两种方法的相关系数r=0.90,两点法的批内CV为3.5%,批间CV为4.6%,平均回收率为96.8%,由此认为两点比色法能快速消除溶血干扰,有一定的实用价值。  相似文献   

11.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

12.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

13.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

14.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

15.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

16.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

17.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

18.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

19.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

20.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

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