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在论述太极拳的特点及其内涵的基础上,试对太极拳的健身尤其是靠衰老功效的分析。认为太极拳能够改善呼吸系统和心血管系统的功能;太极拳可以提高人体骨密度和对本身修心养性有很好的功能。 相似文献
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肽是什么?肽是人体生命的必需因子。肽是两个以上的氨基酸分子联结而成。人体的很多生命活动都是由肽完成的,如调节代谢和传递信息等。人体的很多功能更是离不开各种各样的肽,如记忆功能、心血管功能、消化功能的调节。肽还和人体的免疫功能直接相关联,是机体完成免疫功能和进行免疫调节的重要活性物质。因此科学家认为,肽是人体生命活动的最基本因子。活性肽,生命的灵魂活性肽,顾名思义,就是有生物活性的肽。与蛋白质相比,活性肽在体内易被吸收利用。现代医学发现,小分子肽能直接被人体的粘膜吸收,从而避免了经过肠、胃消化时被降解和失活… 相似文献
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中老年健身跑科学锻炼方法探析 总被引：1，自引：0，他引：1
本文运用文献资料和专家访谈的方法对中老年健身跑的科学锻炼方法展开探讨。指出健身跑对人体大有益处,它能增强和提高心血管系统、呼吸系统、消化系统、神经系统和肝脏等的功能,达到防病治病、延年益寿的效果。 相似文献
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随机选取80名女大学生实施18周初级瑜伽练习,在瑜伽练习前后对受试者进行身体形态和心肺功能相关指标和心血管系统指标进行测试发现瑜伽练习可以减少脂肪、降低安静心率与血压、增加肺活量,通过学生的测出的收缩压、舒张压、心率、脉搏输出量、每分钟输出量、周围阻力、血管弹性和血液黏滞性的测定,来分析瑜伽练习对所测学生心血管机能的影响。结果表明瑜伽能有效改善心血管系统的功能。 相似文献
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跆拳道运动员机体能量代谢水平的高低直接影响运动员成绩。为了更好的提高跆拳道运动员的身体机能及运动成绩,寻找新的训练方法。通过文献综述资料法,专家访谈探析跆拳道运动的功能特点及高原训练对人体能量代谢的影响。研究发现：跆拳道运动项目,以无氧功能系统为主;同时,功能系统是其基础,有氧功能能力的大小是运动最大限度发挥无氧代谢能力的前提和保证。经过高原训练后,人体的肺部,心血管,血管,骨骼肌等会发生一些生理适应变化,从而不仅能大幅度提高机体的有氧代谢能力而且还能提高无氧代谢能力,故建议跆拳道运动员可选择适当时机进行高原训练。 相似文献
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Sanja Kackov Ana-Maria Simundic Ani Gatti-Drnic 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(3):326-331
Introduction:
Proper preparation of the individual is a key prerequisite for ensuring the quality of laboratory testing. Our hypothesis was that many outpatients are not sufficiently familiar with the correct way of preparing for the laboratory tests, for which the individual needs to be at fasting. This study aimed to investigate: i) whether patients are aware of how they need to prepare properly for laboratory tests; ii) the way in which users are informed about how to prepare for laboratory testing; and iii) whether users arrive to the laboratory for phlebotomy properly prepared.Materials and methods:
An anonymous questionnaire was conducted on 150 outpatients older than 18 years, during February 2013. The response rate was 11%. All patients were interviewed by the laboratory staff. Patients were informed about detail of the questionnaire and agreed to participate in the survey.Results:
Out of the total number subjects, 39% were fully aware of the proper definition of the fasting, whereas even 46% subjects replied that the last meal has to be taken the day before and the exact time that must pass after the last meal to blood sampling is not important. Furthermore, 52% subjects did not receive any information about how they need to prepare themselves properly for blood testing. Only 60% of them came properly prepared for the laboratory blood testing.Conclusions:
Substantial proportion of patients do not come properly prepared for laboratory testing. We conclude that patients are not well informed about the fasting requirements for laboratory blood testing. Moreover, requesting physician is the preferred source of information from which patients learn how to prepare themselves for phlebotomy. 相似文献12.
In certain arteries the flow rate of blood can now be quantified by a non-invasive technique based on a newly developed ultrasound velocity profile meter. Clinical applications of this technique indicate that a reliable mathematical model of the circulatory system would facilitate the identification of pathologic patterns of flow rate and the corresponding possible causes. A relatively simple law for the viscoelastic behavior of arterial conduits is hypothesized and its influence on the phasis variations of pressure and flow examined with the aid of the method of characteristics. To test the feasibility of this model, its predictions of the attenuation and dispersion of small sinusoidal pressure waves are compared with data obtained in animal experiments. The results show good agreement and verify the significance of taper in reducing the attenuation of waves propagating towards the periphery and conversely increasing the damping of waves moving towards the heart. Beside this the natural pressure and flow pulses generated by the heart appear to be attenuated in a realistic manner: they no longer exhibit the somewhat exaggerated peaking predicted by the theoretical model when the viscoelasticity of the vessel wall is neglected. 相似文献
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D. Rajasekhar K. S. S. Saibaba P. V. L. N. Srinivasa Rao S. A. A. Latheef G. Subramanyam 《Indian journal of clinical biochemistry : IJCB》2004,19(2):53-59
In an attempt to search for risk factors which can explain the increasing prevalence of coronary heart disease (CHD) in Indian
population, we conducted a case-control study to assess the association of Lipoprotein (a)(Lp(a)) with CHD. One hundred and
fifty one consecutive patients with clinical and angiographic evidence of CHD and forty-nine healthy controls were drawn for
the study. Triglycerides, very low density cholesterol (VLDL-C), total cholesterol (total-C)/high density cholesterol (HDL-C)
ratio, low density cholesterol (LDL-C)/HDL cholesterol ratio and Lp(a) were found to be higher in patients than controls.
In female sex and in those with family history of CHD, higher total and LDL cholesterol levels were observed to be associated
with higher Lp(a) levels. Lp(a) levels were also found to be higher in triple vessel disease than other vessel disease patients.
Significant difference in Lp(a) levels were observed between normal coronaries vs. single and triple vessel disease(P<0.05)
and also between single vs. double and triple vessel disease (P<0.01).Lp(a) levels correlated positively with vessel severity(P<0.005).
Lp(a) levels >25 mg/dl were associated with coronary heart disease (Odds ratio 1.98 P<0.05 95% CI 0.007–1.18). Our findings
suggest a cut-off level of 25mg/dl for determination of risk of CHD. Studies from different areas involving larger sample
size are needed to confirm the findings of the present study. 相似文献
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脑钠肽(BNP)是利尿钠肽家族里的一员，在人体内主要由心室肌细胞合成．它具有排钠、利尿和扩血管作用．其前体片段N端多肽(NT-proBNP)生物半衰期比BNP长，没有生物活性．BNP及NT-proBNP对于心功能不全病人的临床状态评估、治疗策略拟定和预后估计有一定的作用．BNP及NT-proBNP的检测可能会成为对有或者被怀疑有心脏舒张和＼或收缩功能不全的病人的常规性随访项目之一． 相似文献
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Yasemin U Budak Ka?an Huysal Hakan Demirci 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2015,25(1):97-102
Background
In heart failure patients, mean platelet volume (MPV) may reflect increased platelet activation or increased numbers of large, hyper-aggregable platelets. B-type natriuretic peptide (BNP) concentration in blood is a sensitive and specific marker of heart failure, correlating with the severity and prognosis of illness, in patients presenting with acute dyspnea to the emergency department. This study evaluated the correlation between BNP concentration and MPV.Material and methods
Data were collected from 319 patients admitted to the emergency department of a cardiology hospital from January–July 2014. EDTA blood samples drawn at admission were analyzed using automated hematology system, and BNP concentration was measured using a fluorescence immunoassay.Results
The study included 190 patients with and 129 without acute heart failure (AHF). These groups had BNP concentration of 200-5000 ng/L and 5-98 ng/L, respectively. MPV levels were significantly higher in the AHF group (P < 0.001). BNP concentrations were positively correlated with MPV (r = 0.41, P < 0.001) and neutrophil / lymphocyte ratio (r = 0.38, P < 0.001).Conclusion
Increased MPV values correlate with BNP concentration, an indicator of HF severity and clinical status, in patients with AHF admitted to the emergency department.Key words: natriuretic peptide, brain; heart failure; platelet; mean platelet volume 相似文献16.
Lora Duki? Ana-Maria ?imundi? 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2014,24(2):281-292
Introduction:
The aim of this survey study was to assess the current practices and policies in use related to the various steps in the blood gas testing process, across hospital laboratories in Croatia.Materials and methods:
First questionnaire was sent by email to all medical biochemistry laboratories (N = 104) within general, specialized and clinical hospitals and university hospital centres to identify laboratories which perform blood gas analysis. Second questionnaire with detailed questions about sample collection, analysis and quality control procedures, was sent only to 47 laboratories identified by the first survey. Questionnaire was designed as combination of questions and statements with Likert scale. Third questionnaire was sent to all participating laboratories (N=47) for additional clarification for either indeterminate or unclear answers.Results:
Blood gas analysis is performed in 47/104 hospital laboratories in Croatia. In 25/41 (0.61) of the laboratories capillary blood gas sampling is the preferred sample type for adult patient population, whereas arterial blood sample is preferentially used in only 5/44 laboratories (0.11). Blood sampling and sample processing for capillary samples is done almost always by laboratory technicians (36/41 and 37/44, respectively), whereas arterial blood sampling is almost always done by the physician (24/29) and only rarely by a nurse (5/28). Sample acceptance criteria and sample analysis are in accordance with international recommendations for majority of laboratories. 43/44 laboratories participate in the national EQA program. POCT analyzers are installed outside of the laboratory in 20/47 (0.43) institutions. Laboratory staff is responsible for education and training of ward personnel, quality control and instrument maintenance in only 12/22, 11/20 and 9/20 institutions, respectively.Conclusions:
Practices related to collection and analysis for blood gases in Croatia are not standardised and vary substantially between laboratories. POCT analyzers are not under the direct supervision by laboratory personnel in a large proportion of surveyed institutions. Collective efforts should be made to harmonize and improve policies and procedures related to blood gas testing in Croatian laboratories. 相似文献17.
The process of blood vessel formation is accompanied by very minimal flow in the beginning, followed by increased flow rates once the vessel develops sufficiently. Many studies have been performed for endothelial cells at shear stress levels of 0.1-60 dyn∕cm(2); however, little is known about the effect of extremely slow flows (shear stress levels of 10(-4)-10(-2) dyn∕cm(2)) that endothelial cells may experience during early blood vessel formation where flow-sensing by indirect mass transport sensing rather than through mechanoreceptor sensing mechanisms would become more important. Here, we show that extremely low flows enhance proliferation, adherens junction protein localization, and nitric oxide secretion of endothelial cells, but do not induce actin filament reorganization. The responses of endothelial cells in different flow microenvironments need more attention because increasing evidence shows that endothelial cell behaviors at the extremely slow flow regimes cannot be linearly extrapolated from observations at faster flow rates. The devices and methods described here provide a useful platform for such studies. 相似文献
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Gian Luca Salvagno Elisa Danese Gabriel Lima-Oliveira Gian Cesare Guidi Giuseppe Lippi 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(2):201-205
Background
It is still uncertain whether or not avoidance to let disinfectant alcohol dry at the site of venipuncture is a source of spurious hemolysis when drawing venous blood.Methods:
In a consecutive series of 52 outpatients referred for routine laboratory testing, venous blood was drawn by direct venipuncture with (odd group) or without (pair group) wiping 70% isopropyl alcohol at the site of venipuncture. A 3.5 mL evacuated tube with clot activator and gel separator was drawn from a vein of the upper limb, serum was immediately separated with standard centrifugation and tested for potassium, lactate dehydrogenase (LD), aspartate aminotransferase (AST) and hemolysis index (HI) on Roche Cobas.Results:
No specimen was discarded for unsatisfactory venipuncture. No differences for age and gender were observed between groups. As regards the four parameters investigated, no significant differences could be observed between patients in whom blood was drawn with or without letting the alcohol dry. It is also noteworthy that no sample in both groups exceeded the conventional sample rejection threshold of cell-free hemoglobin.Conclusions:
The results of our prospective, randomized study attest that failure to wipe alcohol at the site of venipuncture should not be considered as a potential source of spurious hemolysis when drawing blood. 相似文献19.
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Nakano T Itoyama T Yoshida K Sawada Y Ikeda S Fukuda T Matsuda T Negoro M Arai F 《Biomicrofluidics》2010,4(4):46505
We proposed and fabricated multiscale transparent arteriole and capillary vessel models with circular cross sections of 10-500 μm using photolithography. The circularities of the fabricated 10, 50, and 500 μm diameter microchannels were 84.0%, 61.5%, and 82.3%, respectively. Next, we connected these different models to realize a circulation type blood vessel model simulating arteriole networks. We proposed a novel connection method using an intermediate connector made of wax, which we used to connect these models to make a circulation model. In flow experiments, the fabricated models showed no leakage and circulation models with seamless connections were achieved. 相似文献