全文获取类型
收费全文 | 7398篇 |
免费 | 372篇 |
国内免费 | 30篇 |
学科分类
医药卫生 | 7800篇 |
出版年
2023年 | 86篇 |
2022年 | 317篇 |
2021年 | 421篇 |
2020年 | 196篇 |
2019年 | 219篇 |
2018年 | 299篇 |
2017年 | 221篇 |
2016年 | 267篇 |
2015年 | 297篇 |
2014年 | 365篇 |
2013年 | 524篇 |
2012年 | 691篇 |
2011年 | 692篇 |
2010年 | 372篇 |
2009年 | 242篇 |
2008年 | 218篇 |
2007年 | 227篇 |
2006年 | 229篇 |
2005年 | 191篇 |
2004年 | 159篇 |
2003年 | 136篇 |
2002年 | 94篇 |
2001年 | 83篇 |
2000年 | 67篇 |
1999年 | 97篇 |
1998年 | 44篇 |
1997年 | 33篇 |
1996年 | 30篇 |
1995年 | 40篇 |
1994年 | 36篇 |
1993年 | 23篇 |
1992年 | 23篇 |
1991年 | 32篇 |
1990年 | 38篇 |
1989年 | 31篇 |
1988年 | 37篇 |
1987年 | 42篇 |
1986年 | 37篇 |
1985年 | 49篇 |
1984年 | 30篇 |
1983年 | 45篇 |
1982年 | 39篇 |
1981年 | 35篇 |
1980年 | 27篇 |
1979年 | 34篇 |
1978年 | 34篇 |
1977年 | 29篇 |
1976年 | 38篇 |
1975年 | 31篇 |
1974年 | 25篇 |
排序方式: 共有7800条查询结果,搜索用时 0 毫秒
1.
2.
3.
Piotr Podolec Grzegorz Kope? Jakub Podolec Piotr Wilko?ek Marek Krochin Pawe? Rubi? Marcin Cwynar Tomasz Grodzicki Krzysztof Zmudka Wies?awa Tracz 《Hypertension research》2007,30(12):1151-1158
The objectives of this study were to determine the relationship between carotid-femoral (cfPWV) and aortic pulse wave velocity (aPWV) and to compare their modulators and association with coronary artery disease (CAD). We studied 107 consecutive patients (68 men) with a mean age of 60.49+/-8.31 years who had stable angina and had been referred for coronary angiography. cfPWV and aPWV were measured simultaneously during cardiac catheterization using the Complior device and aortic pressure waveform recordings, respectively. Based on the presence or absence of significant coronary artery stenosis (CAS) patients were subdivided into a CAS+ or CAS- group. The mean values of cfPWV and aPWV were 10.65+/-2.29 m/s and 8.78+/-2.24 m/s, respectively. They were significantly higher in the CAS+ (n=71) compared with the CAS- (n=36) group and predicted significant CAS independently of cardiovascular risk factors and mean or systolic aortic blood pressure. aPWV and cfPWV were significantly correlated (r=0.70; p<0.001) but the degree of correlation differed significantly (p<0.03) between the CAS+ (r=0.74, p<0.001) and CAS- group (r=0.46, p=0.003). Age and mean aortic blood pressure were independent predictors for aPWV as well as cfPWV. In the receiver operating characteristic (ROC) analysis, aPWV and cfPWV had similar accuracy in identification of significant CAS (AUC [area under the ROC curve]=0.76 and 0.69, respectively; p=0.13). However, neither cfPWV nor aPWV was effective at differentiating the extent of CAD. In conclusion, aPWV and cfPWV are highly correlated parameters with similar determinants and comparable accuracy in predicting significant CAS. The strength of correlation between these two indices differed significantly between subjects with and those without CAS. 相似文献
4.
Summary During studies on the helminth fauna of wolves inhabiting natural ecosystems of Poland, 86 scats were examined. All the samples
were collected in the autumn of 2005. Spirocerca lupi was detected with decantation and flotation techniques. The prevalence was 2.32 %. This is the first record of the parasite
from Poland and the third case of its occurrence in the wolf (Canis lupus L.) within its distribution range. 相似文献
5.
Marek Motyka PhD Helena Motyka MA RN Romana Wsoek MA RN 《Journal of advanced nursing》1997,26(5):909-912
The paper presents the results of a pilot study which involved 50 nurses from several departments of internal medicine of The State Clinical Hospital of the Collegium Medicum, Jagiellonian University in Cracow. The results are based on the Statement Response Questionnaire. They show that the most common responses of the nurses in the face of anxiety expressed by patients are cheering up the patient, collecting information about the symptom, and offering explanation of the symptom. The least common responses included expressing one's own positive emotions and showing empathy towards the patient. 相似文献
6.
7.
Johanna Albert Leif Kindlund Barbro Nilvér Waldemar Gożdzik 《Central European Journal of Medicine》2006,1(2):162-171
Abstract: Background: The laryngeal mask airway (LMA) can be used in general anaesthesia without neuromuscular block. The
laryngeal tube (LT) is a new airway device with similar airway features as LMA. LT is provided with a distal cuff to prevent
regurgitation. In this study we compared the LMA and LT concerning patient and user aspects.
Methods: Sixty patients with ASA (American Society of Anestesiologists) score 1–2 scheduled for minor surgery were randomized
to be ventilated either through LMA or LT. After insertion, the number of insertion attempts, and “positioning” and “airway-assessment”
was evaluated. The patients reported on “sore throat” after 30 and 60 minutes and the day after anaesthesia.
Results: Gender and mean age were equal in both groups. The first insertion attempt was successful in 25 of 28 patients randomised
to LMA and in 23 of 27 patients randomised to LT. LMA was evaluated to be easier in “positioning” whereas no difference in
“sore throat” was reported.
Conclusion: We found no difference between the LMA and the LT in terms user and patient friendliness and safety. 相似文献
8.
Ten new 3-(o-, 3-(m- and 3-(p-chlorophenyl)-5-benzylidene derivatives of 2-thiohydantoin were obtained. Their IR spectra were recorded. The obtained compounds were tested for anticonvulsant activity using the test of minimal and maximal pentetrazol shock in mice, and the MES test in rats. 相似文献
9.
Orbital hydatid cyst is rare. We present a case with CT and MRI, emphasizing the superiority of the latter.
Received: 19 August 1996 Accepted: 9 September 1996 相似文献
10.