全文获取类型
收费全文 | 27737篇 |
免费 | 1385篇 |
国内免费 | 148篇 |
专业分类
耳鼻咽喉 | 155篇 |
儿科学 | 658篇 |
妇产科学 | 457篇 |
基础医学 | 3537篇 |
口腔科学 | 768篇 |
临床医学 | 1828篇 |
内科学 | 7149篇 |
皮肤病学 | 476篇 |
神经病学 | 2352篇 |
特种医学 | 920篇 |
外科学 | 4491篇 |
综合类 | 169篇 |
一般理论 | 1篇 |
预防医学 | 759篇 |
眼科学 | 401篇 |
药学 | 1926篇 |
中国医学 | 64篇 |
肿瘤学 | 3159篇 |
出版年
2023年 | 143篇 |
2022年 | 298篇 |
2021年 | 495篇 |
2020年 | 280篇 |
2019年 | 357篇 |
2018年 | 518篇 |
2017年 | 370篇 |
2016年 | 422篇 |
2015年 | 502篇 |
2014年 | 628篇 |
2013年 | 760篇 |
2012年 | 1229篇 |
2011年 | 1367篇 |
2010年 | 771篇 |
2009年 | 676篇 |
2008年 | 1172篇 |
2007年 | 1380篇 |
2006年 | 1312篇 |
2005年 | 1408篇 |
2004年 | 1330篇 |
2003年 | 1269篇 |
2002年 | 1325篇 |
2001年 | 972篇 |
2000年 | 954篇 |
1999年 | 931篇 |
1998年 | 393篇 |
1997年 | 327篇 |
1996年 | 358篇 |
1995年 | 229篇 |
1994年 | 204篇 |
1993年 | 195篇 |
1992年 | 564篇 |
1991年 | 515篇 |
1990年 | 539篇 |
1989年 | 487篇 |
1988年 | 462篇 |
1987年 | 452篇 |
1986年 | 405篇 |
1985年 | 416篇 |
1984年 | 303篇 |
1983年 | 212篇 |
1979年 | 224篇 |
1978年 | 153篇 |
1977年 | 149篇 |
1974年 | 135篇 |
1971年 | 139篇 |
1970年 | 135篇 |
1969年 | 131篇 |
1968年 | 141篇 |
1967年 | 142篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
H Niinami Y Egoh T Okoshi T Katsumata S Kato H Kobayashi M Nakagawa S Takahashi 《Kyobu geka. The Japanese journal of thoracic surgery》1990,43(12):1004-1007
Aneurysms of the inferior left ventricular wall represent only a small fraction of all aneurysms that have been reported in surgical series. And in comparison to anterior left ventricular aneurysms, a comparatively higher percentage of reported inferior wall aneurysms was classified as false. A 73-year-old male was admitted for acute inferior myocardial infarction. Three weeks after admission, cardiac catheterization was carried out. Coronary arteriography revealed triple vessel disease and left ventriculography showed an aneurysm of the inferior left ventricular wall, whose feature near the mitral annulus was multiple fenestrations. Left ventricular aneurysmectomy and aortocoronary bypass grafting to the left anterior descending artery were simultaneously performed under cardiopulmonary bypass with moderate hypothermia. The pathological feature was a true aneurysm. The postoperative course was uneventful. 相似文献
32.
33.
34.
35.
Takashi Akasaki Yusuke Ohya Junya Kuroda Kimika Eto Isao Abe Hideki Sumimoto Mitsuo Iida 《Hypertension research》2006,29(10):813-820
Although vascular cells express multiple members of the Nox family of nicotinamide adenine dinucleotide phosphate (NAD(P)H) oxidase, including gp91phox, Nox1, and Nox4, the reasons for the different expressions and specific roles of these members in vascular injury in chronic hypertension have remained unclear. Thus, we quantified the mRNA expressions of these NAD(P)H oxidase components by real-time polymerase chain reaction and evaluated superoxide production and morphological changes in the aortas of 32-week-old stroke-prone spontaneously hypertensive rats (SHRSP) and age-matched Wistar Kyoto rats (WKY). The aortic media of SHRSP had an approximately 2.5-fold greater level of Nox4 mRNA and an approximately 10-fold greater level of Nox1 mRNA than WKY. The mRNA expressions of gp91phox and p22phox in SHRSP and WKY were comparable. SHRSP were treated from 24 weeks of age for 8 weeks with either high or low doses of candesartan (4 mg/kg/day or 0.2 mg/kg/day), or a combination of hydralazine (30 mg/kg/day) and hydrochlorothiazide (4.5 mg/kg/day). The high-dose candesartan or the hydralazine plus hydrochlorothiazide decreased the blood pressure of SHRSP to that of WKY, whereas the low-dose candesartan exerted no significant antihypertensive action. Media thickening and fibrosis, as well as the increased production of superoxide in SHRSP, were nearly normalized with high-dose candesartan and partially corrected with low-dose candesartan or hydralazine plus hydrochlorothiazide. These changes by antihypertensive treatment paralleled the decrease in mRNA expression of Nox4 and Nox1. These results suggest that blood pressure and angiotensin II type 1 receptor activation are involved in the up-regulation of Nox1 and Nox4 expression, which could contribute to vascular injury during chronic hypertension. 相似文献
36.
T Yamagami S Iida T Kato T Hirota T Nishimura 《Journal of Medical Imaging and Radiation Oncology》2006,50(1):75-78
We present a patient with gastric varices complicating portal hypertension caused by liver cirrhosis related to hepatitis C virus. The patient underwent balloon‐occluded retrograde transvenous obliteration. The gastric varices almost completely disappeared, without any sclerotic agent being used, after iatrogenic injury of the gastrorenal shunt at the time of the interventional procedure. 相似文献
37.
Takanobu Anai M.D. Isao Miyakawa M.D. Ph.D. Hiromi Ohki M.D. Teruyuki Ogawa M.D. Ph.D. 《Pediatrics international》1992,34(3):324-327
There have been only 2 previous reports of nonimmunologic hydrops fetalis (NIHF) caused by fetal Kasabach-Merritt syndrome, both of which were pathological studies. This is the first clinical case report of NIHF due to fetal Kasabach-Merritt syndrome that was prenatally diagnosed by sonography, computerized tomography, and percutaneous umbilical blood sampling. 相似文献
38.
Hitoshi Taguchi Koh Yamada Hideo Matsumoto Akira Kato Toshihiro Imanishi Koh Shingu 《Journal of anesthesia》1997,11(3):173-178
Purpose Several case reports indicate critical respiratory complications in relation to the double-lumen endobronchial tube (DLT).
A prospective survey for the airway problems in using the DLT is presented.
Methods One hundred adult patients undergoing thoracotomy for lung cancer were investigated. Tube malposition and airway obstruction
were searched using a fiber-optic scope. The endobronchial cuff was positioned just below the trachcal carina while the trachea
was intubated with a DLT (Rüsch). The distances of displacement, from the tracheal carina to the bronchial cuff, were measured
during anesthesia using an epidural catheter, which had marks every 5 mm. The distances for correcting the tube position were
measured at both the bronchial cuff and the level of the teethPaO2,PaCO2 andSPO2 were also measured.
Results Malposition (displacement over 5 mm from the correct position) was found in 42 patients, and 40 of them were in a withdrawal
direction, occurring at the postural change and during one-lung ventilation, especially during manipulation of the lung hilum.
Correcting distances at the level of the teeth were 15.3–3-times longer than those at the bronchial cuff. Airway deformities
and gradual withdrawal of the bronchial cuff were found in association with surgical manipulation. Obstruction occurred at
the tips of the tracheal tube in four patients and the bronchial tube in six patients, and at the tip of both in two patients.
Hypoxemia (PaO2<60 mmHg) occurred in four patients and hypercapnea (PaCO2>60 mm Hg) in two patients.
Conclusion Most of the DLT obstructions were associated with withdrawal malposition. Great attention to DLT displacement and airway deformity
is advised. 相似文献
39.
Relations between lipoprotein indices and the waist/hip ratio (WHR) were examined in normoglycemic subjects (124 women and 63 men). Among women, an atherogenic lipoprotein pattern was strongly associated with WHR. The relation was greater than that of the lipoprotein pattern with either the body mass index or the subscapular/triceps ratio, and was independent of these adiposity measures. The association between low-density-lipoprotein cholesterol (LDL-cholesterol) and WHR was much stronger in thinner women than in those more obese (r = 0.64 vs r = 0.22, p = 0.001 for difference). Men had a more atherogenic lipoprotein pattern than women; however, with allowances for WHR the lipoprotein patterns were similar. These findings suggest that: (1) WHR is more strongly related to plasma lipoproteins than other adiposity measures; (2) there is effect modification by the extent of adiposity for the relation between LDL-cholesterol and WHR; and (3) the adipose distribution may be important in explaining lipoprotein differences between men and women. 相似文献
40.
K Ueda H Sakagami F Kato T Mogami K Ohtaguro Y Masui 《Nihon Hinyōkika Gakkai zasshi. The japanese journal of urology》1990,81(9):1330-1336
Hyperthermia was induced for the treatment of invasive bladder carcinoma in order to study its usefulness. The subjects were 12 cases of invasive bladder cancer; including 5 cases of T2, 3 cases of T3, 2 cases of T4, and 2 cases of recurrence after total cystectomy. As previous treatment, 4 patients received radiotherapy and the other received TUR, systemic chemotherapy, and intravesical injection of anticancer drugs. For hyperthermia treatment, a Thermotron RF-8 was used for heating a deep seated tumor. Each case received hyperthermia 2 to 10 times. Combined therapy included injection of HPC-adriamycin into the urinary bladder in 5 cases, immunotherapy in 3 cases, M-VAC therapy in one case, radiotherapy in one case, radiotherapy and intra-arterial injection in one case, and Peplomycin and OK-432 local injection in one case. The treatment results showed a 75% effectiveness; with CR in 4 cases, PR in 5 cases, MR in 2 cases and PD in one case. Three patients died and 9 survived. Of four patients who had received radiotherapy as a previous treatment 3 cases obtained CR and one case MR. Therefore, it was considered that a favorable treatment effect with hyperthermia could be obtained after radiotherapy. 相似文献