全文获取类型
收费全文 | 1116篇 |
免费 | 54篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 51篇 |
妇产科学 | 29篇 |
基础医学 | 78篇 |
口腔科学 | 15篇 |
临床医学 | 44篇 |
内科学 | 233篇 |
皮肤病学 | 2篇 |
神经病学 | 28篇 |
特种医学 | 51篇 |
外科学 | 404篇 |
综合类 | 12篇 |
预防医学 | 8篇 |
眼科学 | 5篇 |
药学 | 56篇 |
中国医学 | 1篇 |
肿瘤学 | 157篇 |
出版年
2023年 | 3篇 |
2022年 | 8篇 |
2021年 | 24篇 |
2020年 | 7篇 |
2019年 | 17篇 |
2018年 | 15篇 |
2017年 | 13篇 |
2016年 | 24篇 |
2015年 | 19篇 |
2014年 | 20篇 |
2013年 | 20篇 |
2012年 | 44篇 |
2011年 | 43篇 |
2010年 | 26篇 |
2009年 | 15篇 |
2008年 | 41篇 |
2007年 | 46篇 |
2006年 | 48篇 |
2005年 | 52篇 |
2004年 | 54篇 |
2003年 | 51篇 |
2002年 | 58篇 |
2001年 | 36篇 |
2000年 | 34篇 |
1999年 | 40篇 |
1998年 | 9篇 |
1997年 | 7篇 |
1996年 | 7篇 |
1995年 | 6篇 |
1994年 | 13篇 |
1993年 | 10篇 |
1992年 | 48篇 |
1991年 | 61篇 |
1990年 | 54篇 |
1989年 | 37篇 |
1988年 | 31篇 |
1987年 | 31篇 |
1986年 | 25篇 |
1985年 | 7篇 |
1984年 | 7篇 |
1983年 | 6篇 |
1981年 | 4篇 |
1979年 | 7篇 |
1977年 | 6篇 |
1974年 | 5篇 |
1972年 | 4篇 |
1971年 | 4篇 |
1970年 | 3篇 |
1968年 | 9篇 |
1966年 | 3篇 |
排序方式: 共有1175条查询结果,搜索用时 0 毫秒
1.
K Murata H Itoh G Todo T Itoh M Kanaoka M Furuta K Torizuka 《Investigative radiology》1986,21(1):24-30
This study was undertaken to clarify the microvascular anatomy of the normal human bronchial circulation, focusing on the bronchial venous system and its communication with the pulmonary circulation. Ten normal lungs obtained at autopsy were studied. Bronchial arteriography was performed in six lungs, pulmonary arteriography in two lungs, and pulmonary venography in another two. Using radiologic methods, including microradiography, and serial histologic sections, we found numerous bronchial venous plexuses around the airways and blood vessels into which the bronchial capillaries drained. Frequent communications of the venous plexuses with the pulmonary veins and neighboring alveolar capillaries were also demonstrated. The bronchial venous plexus and its close connection with the pulmonary circulation may be important in various pathologic conditions involving the interstitial space, such as interstitial pulmonary edema. 相似文献
2.
Assay of FK 506 in plasma. 总被引:1,自引:0,他引:1
3.
4.
5.
6.
The incidence, timing, and management of biliary tract complications after orthotopic liver transplantation. 总被引:29,自引:1,他引:28 下载免费PDF全文
F Greif O L Bronsther D H Van Thiel A Casavilla S Iwatsuki A Tzakis S Todo J J Fung T E Starzl 《Annals of surgery》1994,219(1):40-45
OBJECTIVE: This study analyzed the incidence and timing of biliary tract complications after orthotopic liver transplantation (OLTx) in 1792 consecutive patients. These results were then compared with those of previously reported series. Finally, recommendations were made on appropriate management strategies. SUMMARY BACKGROUND DATA: Technical complications after OLTx have a significant impact on patient and graft survival. One of the principal technical advances has been the standardization of techniques for biliary reconstruction. Nonetheless, biliary complications still occur. A 1983 report from the University of Pittsburgh reported biliary complications in 19% of all transplants, and an update in 1987 reported biliary complications in 13.2% of transplants. METHODS: The medical records of all patients who underwent liver transplantation and were hospitalized between January 1, 1988 and July 31, 1991 were reviewed. The case material consisted of the medical records of 217 patients treated for 245 biliary complications. RESULTS: Primary biliary continuity was established by either choledochocholedochostomy over a T-tube (C-C, n = 129) or a Roux-en-Y choledochojejunostomy with an internal stent (C-RY, n = 85). The overall incidence for biliary complication in this large series was 11.5%. Strictures (n = 93) and bile leak (n = 58) were the most common complications (69.6%). Most biliary complications (n = 143, 66%) occurred within the first 3 months after surgery. In general, leaks occurred early, and strictures developed later. Bile leaks were equally frequent in both C-C and C-RY (27.1% and 25.9%, respectively); strictures were more common after a C-RY type of reconstruction (36.4% and 52.9%, respectively). Twenty-one patients died, an incidence of 9.6%. Fifteen of the 21 biliary-related deaths were among patients treated for rejection before the recognition of biliary tract pathologic findings. CONCLUSIONS: Progress has been made on improving the results of biliary reconstruction after OLTx. Nonetheless, patients continue to experience biliary complications after OLTx, and these complications cause considerable loss of grafts and life. If significant additional improvement in patient and graft survival are to be obtained, the technical performance of OLTx must continue to improve. 相似文献
7.
X Renming K Ishihara M Sasa H Ujihara T Momiyama Y Fujita N Todo T Serikawa J Yamada S Takaori 《European journal of pharmacology》1992,223(2-3):185-192
The effects of CNK-602A (N-[(6-methyl-5-oxo-3-thiomorpholinyl) carbonyl]-L-histidyl-L-prolinamide), a novel thyrotropin-releasing hormone related analog, were investigated on absence-like seizure and tonic convulsion in the spontaneously epileptic rat (SER), which is a genetically defined double-mutant. When CNK-602A of 0.2-1 mg/kg was given intravenously to the animal, there were no changes in the background EEG except for an increase in low-voltage fast waves concomitant with behavioral alertness. However, CNK-602A suppressed absence-like seizure and tonic convulsion in a dose-dependent manner for over 1 h. These antiepileptic effects of CNK-602A on both seizures were antagonized by pretreatment with haloperidol (1 mg/kg, i.p.). It was found, using a brain in vivo microdialysis method, that CNK-602A at a dose of 1 mg/kg, which inhibits the seizures, increased the release of dopamine in the caudate nucleus. These results suggest that CNK-602A inhibits the seizures of SER in a similar manner to thyrotropin-releasing hormone (TRH), probably by increasing the release of dopamine in the central nervous system. In addition, the antiepileptic effects of CNK-602A were more potent and lasted longer than those of TRH. 相似文献
8.
Right trisegmentectomy with a synthetic vena cava graft 总被引:2,自引:0,他引:2
In the course of a right trisegmentectomy of the liver, nearly the entire length of the retrohepatic vena cava was replaced with a Dacron graft. Patency of the graft was proved by a venacavogram a year later. 相似文献
9.
10.
Yoshihide Nagasako Meang Bong Jin Hiroshi Miyazaki Masato Nakayama Tsuyoshi Shimamura Hiroyuki Furukawa Michiaki Matushita Satoru Todo 《Liver transplantation》2006,12(3):435-439
Thrombocytopenia is a frequent finding following living donor hepatectomy. It appears more pronounced in right graft donors than in left graft donors. This study analyzed postoperative thrombocytopenia in 20 living liver donors and examined the change of endogenous thrombopoietin (TPO) in its recovery. Platelet count, TPO level, fibrinogen degradation product (FDP), and D-Dimer were measured before surgery and on postoperative days (PODs) 1, 2, 3, 5, 7, and 14. Concurrently, liver and spleen volumes were calculated by computed tomography. Platelet count on POD 3 was significantly lower in right graft donors than in left graft donors (13.0 +/- 3.7 x 10(4)/microL vs. 16.8 +/- 4.0 x 10(4)/microL, P = 0.039) but recovered by POD 7 in all donors. Postoperative elevations of FDP and D-Dimer were significantly higher in right graft donors than in left graft donors. TPO level rose immediately after surgery, peaked on POD 5 in left graft donors and on POD 7 in right graft donors, and fell nearly to preoperative levels by POD 14. Postoperative TPO level per liver volume was significantly higher in right graft donors than in left graft donors. In conclusion, thrombocytopenia following living donor hepatectomy resolved within the first week regardless of graft type and was mainly associated with increasing consumption of circulating platelets, possibly due to intrahepatic and splenic congestion. With a reduced number of circulating platelets, TPO level rapidly increases. Also, with reduced consumption of platelets related to recovery from surgery, thrombocytopenia should resolve. As a consequence, TPO level would be expected to fall. 相似文献