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排序方式: 共有275条查询结果,搜索用时 15 毫秒
1.
目的:探讨3种血清心肌标志物联合检测在急性心肌梗死诊断中的应用。方法选取急性心肌梗死患者43例作为观察组;选取普通冠心病患者43例作为对照组;选取进行体检的健康体检者的血液样本43例作为空白对照组。对每组成员的Mb、cTcI、CK-MB进行检测、统计学分析及评价。结果观察组患者血清中Mb、cTnI、CK-MB水平均高于对照组及空白对照组,差异有统计学意义(P<0.05)。结论血清Mb是急性心肌梗死诊断中具有敏感性、特异性的生化指标,血清中Mb、cTnI、CK-MB的联合检测对于急性心肌梗死的早期诊断及鉴别诊断,具有重要的临床意义。  相似文献   
2.
目的调查军事训练中骨骼肌肉损伤情况。方法应用肌酸激酶(creatine kinase,CK)和肌红蛋白(myoglobin,Mb)评估肌肉损伤,对563名新兵进行了血清电解质、CK、肌酸激酶同功酶(creatine kinase isoenzyme-MB,CKMB)、Mb和肌钙蛋白Ⅰ(cardiac troponinⅠ,cTnⅠ)检测。结果军事训练后CK和Mb明显升高,而cTnⅠ均正常。高CK值者血清钾、钠和镁含量低,而血清磷含量高。且体质量指数与血清CK含量呈正相关。结论军事训练可引起骨骼肌细胞损伤,低钾、低镁和超重是军事训练引起骨骼肌细胞损伤的高危因素。  相似文献   
3.
Haemoglobin and myoglobin are haem proteins that play a key role as they help transport oxygen around the body. However, because of their chemical structure, these molecules can exert harmful effects when they are released massively into the bloodstream, as reported in certain pathological conditions associated with rhabdomyolysis or intravascular haemolysis. Once in the plasma, these haem proteins can be filtered and can accumulate in the kidney, where they become cytotoxic, particularly for the tubular epithelium, inducing acute kidney failure and chronic kidney disease. In this review, we will analyse the different pathological contexts that lead to the renal accumulation of these haem proteins, their relation to both acute and chronic loss of renal function, the pathophysiological mechanisms that cause adverse effects and the defence systems that counteract such actions. Finally, we will describe the different treatments currently used and present new therapeutic options based on the identification of new cellular and molecular targets, with particular emphasis on the numerous clinical trials that are currently ongoing.  相似文献   
4.
目的探究高敏C反应蛋白(hs-CRP)、肌红蛋白(Myo)、心肌肌钙蛋白T(cTnT)和肌酸激酶MB同工酶(CK-MB)联合检测对急性心肌梗死(AMI)诊断中的应用。方法随机选取并回顾性分析2011年6月至2012年66月于我院诊断为急性心肌梗死患者70例及同时期进行体检的健康人群70例。研究组为急性心梗患者,发病均在6h内;对照组为签署知情同意书的体检健康人群。采用化学发光法测定两组研究对象hs-CRP、MYO、cTnT、CK-MB四项指标的阳性率及研究组发病3h、6h、12h、24h内的指标变化。结果观察两组患者高敏C反应蛋白(hs-CRP)、肌红蛋白(Myo)、心肌肌钙蛋白T(cTnT)和肌酸激酶同工酶(CK-MB)检测值,研究组检测值明显高于对照组,差异存在统计学差异(P0.05);hs-CRP最高峰出现在发病后12-24h之间,Myo最高峰出现在发病后6-12h内,cTnT最高峰出现在发病后6-12h,CK-MB最高峰出现在发病后12-24h内。结论 AMI患者血清内Myo、hs-CRP、CK-MB和cTnT值均在AMI发病2h后不同程度的升高,四项联合检测对AMI的诊断中有较大参考价值,可作为AMI发生早期有效实验室指标。  相似文献   
5.
Myoglobin plays an important role in rhabdomyolysis‐induced acute kidney injury (AKI), but the underlying mechanisms are still unclear. The present study investigates myoglobin‐induced apoptosis in HK‐2 cells (human renal proximal tubule cells) to discover some of the mechanisms involved in rhabdomyolysis related AKI. Metmyoglobin is reduced to ferrous myoglobin by ascorbic acid, and then the HK‐2 cells are incubated with ferrous myoglobin. Cell viability is measured by 3‐(4,5)‐dimethylthiahiazo(‐z‐y1)‐3,5‐di‐phenytetrazoliumromide (MTT) assay, and cell injury is tested by supernatant lactose dehydrogenase (LDH). Cell apoptosis is evaluated by fluorescent microscopy of Hoechst staining and by flow cytometry of Annexin V/PI double staining. The apoptosis related protein expression is determined by Western blot. HK‐2 cells were incubated with 200 µM ferrous myoglobin for 24 h, the cell viability decreased and supernatant LDH release increased. Hoechst staining indicated more apoptosis after incubation. Molecular chaperone glucose‐related protein 78 (GRP78), cytochrome C, caspase‐9 started to increase within 3 h after incubation while caspase‐4, caspase‐8 showed no significant change. (iii) When the inositol triphosphate receptor (IP3R) calcium channel was blocked by 2‐aminoethoxydiphenyl‐borinate (2‐APB), caspase‐9 was completely inhibited, GRP78 and caspase‐4 increased dramatically, and caspase‐3 expression was not affected. The apoptosis in HK‐2 cells showed no significant change. Apoptosis in HK‐2 cells incubated with ferrous myoglobin is an endoplasmic reticulum stress induced, IP3R calcium channel mediated, caspase‐9 dependent intrinsic pathway. When the intrinsic pathway was inhibited using an IP3R calcium channel blocker, endoplasmic reticulum stress increased, resulting in the activation of caspase‐4 that cleaved caspase‐3 and generated a substitutive pathway of apoptosis.  相似文献   
6.
We calculated the light absorbing potential (LAP) of hemoglobin (Hb) and myoglobin (Mb) in mammalian skeletal muscle at rest based on analysis of published chemical and morphometric data (Part 1), interpreted changes in total[Hb + Mb] from NIRS during exercise (Part 2), and estimated the potential contribution of Hb and Mb to changes in NIRS from rest to exercise (Part 3). Part 1: [Hb] in skeletal muscle was estimated from microvascular volume, systemic blood [Hb], and microvascular hematocrit and saturation at rest and during exercise. Part 2: Changes in total[Hb + Mb] (as t[Hb + Mb]) during cycling or knee extension exercise were interpreted using the results of Part 1. Part 3: Using estimates of mean microvascular PO2, Hb and Mb contribution at peak exercise was estimated. Across several species, [Mb] contributed ∼50–70% of the total LAP to NIRS at rest in skeletal muscle. With exercise, increases in t[Hb + Mb] of up to 30% could be entirely explained by the predicted increase in microvascular hematocrit with exercise. Finally, Mb was estimated to contribute ∼70% of the changes in NIRS from rest to peak exercise.  相似文献   
7.
This material comprises 100 cases of aortic valve replacement. Ninety-one of the valves were replaced with the Björk—Shiley tilting disc valve prosthesis and 9 with the Smeloff—Cutter ball valve. No coronary perfusion was used during surgery. The myocardium was protected by local myocardial hypothermia, achieved by an intracoronary infusion of Bretschneider's solution (+4°C) prior to surgery. A weak and flaccid heart without coronary perfusion cannulas facilitated the surgical procedure. Myocardial function was very good and the course of the patients excellent postoperatively. Seven percent of the patients were lost within one month after operation and late mortality was 13%. A comparison between clinical and haemodynamic findings obtained 2–3 months before and one year after surgery was made in 55 patients. A marked subjective improvement was seen in all but five patients. There was a significant increase of average physical working capacity and regression of ECG-signs of left ventricular hypertrophy and strain as well as of roentgenological heart size. Angina pectoris was present in only three patients postoperatively as compared with 23 before surgery. The improvement of physical working capacity was paralleled by a significant increase of cardiac output during exercise, caused by a rise of stroke volume, heart rate on maximal load tolerated remaining unchanged. Blood pressure reactions during work were normalized in patients with both pre-operative aortic stenosis and aortic insufficiency. A significant postoperative paravalvular leakage was rare in the present material.  相似文献   
8.

Objective

To examine the association between survival and serum concentrations of cTnI, CK-MB, and myoglobin in patients with idiopathic dilated cardiomyopathy (IDC).

Background

It has been suggested that elevated circulating biomarkers of myocardial damage such as cardiac troponin-I (cTnI), creatine kinase MB (CK-MB) and myoglobin are independent risk factors for mortality in patients with heart failure, and recent studies, although limited, showed that there was a potential association between cTnI and the prognosis of patients with dilated cardiomyopathy (DCM).

Methods

A cohort study was undertaken in 310 patients with IDC. Standard demographic information, transthoracic echocardiography, and routine blood tests were obtained shortly after hospital admission. Outcome was assessed with all-cause mortality.

Results

Among the 310 patients studied, 61 (19.7%) died during a mean follow-up of 2.2 years. There was a significant difference in the all-cause mortality rate between patients with serum cTnI >0.05 ng/mL and with cTnI ≤0.05 ng/mL (37.5% vs 15%, log-rank χ2 = 18.423, P < 0.001). After adjustment for other factors associated with prognosis at baseline, serum cTnI >0.05 ng/mL, QRS duration, NYHA functional class and systolic blood pressure predicted all-cause mortality in patients with IDC. There was no association between circulating CK-MB and myoglobin levels and all-cause mortality in the studied IDC patients.

Conclusion

Serum concentrations of cTnI but not CK-MB or myoglobin are an independent predictor of all-cause mortality in patients with IDC.  相似文献   
9.
探讨缺血修饰白蛋白(IMA)、Hcy、Hs-CRP、cTnI、Mb和B型钠酸肽(BNP)水平在急性冠状动脉综合征(ACS)早期诊断中的价值.选择胸痛患者小于3h内、6h测定血清IMA、Hcy、Hs-CRP、cTnI、Mb和BNP水平,并与对照组比较.结果表明,3h组IMA和Mb水平与对照组相比差异有统计学意义(P<0....  相似文献   
10.
李欢庆 《现代保健》2011,(17):13-14
目的探讨心肌损伤标志物对诊断新生儿缺氧缺血性脑病(HIE)患者心肌损伤的临床意义。方法对不同程度HIE患儿和健康新生JL(对照组)分别测定血清cTnI、CK—MB和Mb浓度。结果3组HIE患儿心肌损伤标志物均增高,其中以重度患儿最高,中度患儿次之,轻度患儿增高较少。组间比较差异均有统计学意义(P〈0.05)。HIE患儿出生第1天均以Mb异常率最高,3d后Mb均持续下降,阳性持续时间短,而CK—MB和cTnI却升至峰值,并维持在较高水平达1周以上。结论HIE患儿脑损伤越重,心肌损伤也越重;联合检测心肌损伤标志物有利于心肌损伤的早期诊断、程度评估及预后判断。  相似文献   
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