全文获取类型
收费全文 | 730篇 |
免费 | 29篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 11篇 |
儿科学 | 11篇 |
妇产科学 | 1篇 |
基础医学 | 58篇 |
口腔科学 | 6篇 |
临床医学 | 54篇 |
内科学 | 228篇 |
皮肤病学 | 10篇 |
神经病学 | 42篇 |
特种医学 | 128篇 |
外科学 | 70篇 |
综合类 | 17篇 |
一般理论 | 1篇 |
预防医学 | 35篇 |
眼科学 | 14篇 |
药学 | 19篇 |
肿瘤学 | 65篇 |
出版年
2023年 | 6篇 |
2022年 | 18篇 |
2021年 | 29篇 |
2020年 | 16篇 |
2019年 | 15篇 |
2018年 | 23篇 |
2017年 | 19篇 |
2016年 | 17篇 |
2015年 | 24篇 |
2014年 | 36篇 |
2013年 | 37篇 |
2012年 | 50篇 |
2011年 | 51篇 |
2010年 | 39篇 |
2009年 | 30篇 |
2008年 | 49篇 |
2007年 | 48篇 |
2006年 | 48篇 |
2005年 | 53篇 |
2004年 | 36篇 |
2003年 | 30篇 |
2002年 | 31篇 |
2001年 | 6篇 |
2000年 | 5篇 |
1999年 | 3篇 |
1998年 | 5篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 4篇 |
1990年 | 10篇 |
1989年 | 3篇 |
1988年 | 1篇 |
1987年 | 4篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1964年 | 1篇 |
排序方式: 共有770条查询结果,搜索用时 0 毫秒
761.
Thyroid hormone alterations in trauma patients requiring massive transfusion: An observational study
Toru Hifumi Ichiro Okada Nobuaki Kiriu Eiju Hasegawa Tomoko Ogasawara Hiroshi Kato Yuichi Koido Junichi Inoue Yuko Abe Kenya Kawakita Masanobu Hagiike Yasuhiro Kuroda 《世界急诊医学杂志(英文)》2014,5(4):270-274
BACKGROUND:
Although non-thyroidal illness syndrome (NTIS) is considered a negative prognostic factor, the alterations in free triiodothyronine (fT3) levels in trauma patients requiring massive transfusion have not been reported.METHODS:
A prospective observational study comparing 2 groups of trauma patients was conducted. Group M comprised trauma patients requiring massive transfusions (>10 units of packed red blood cells) within 24 hours of emergency admission. Group C comprised patients with an injury severity score >9 but not requiring massive transfusions. Levels of fT3, free thyroxine (fT4), and thyroid-stimulating hormone (TSH) were evaluated on admission and on days 1, 2, and 7 after admission. The clinical backgrounds and variables measured including total transfusion amounts were compared and the inter-group prognosis was evaluated. Results are presented as mean±standard deviation.RESULTS:
Nineteen patients were enrolled in each group. In both groups, 32 were men, and the mean age was 50±24 years. In group C one patient died from respiratory failure. The initial fT3 levels in group M (1.95±0.37 pg/mL) were significantly lower than those in group C (2.49±0.72 pg/mL; P<0.01) and remained low until 1 week after admission. Initial inter-group fT4 and TSH levels were not significantly different. TSH levels at 1 week (1.99±1.64 µIU/mL) were higher than at admission (1.48±0.5 µIU/mL) in group C (P<0.05).CONCLUSION:
Typical NTIS was observed in trauma patients requiring massive transfusions. When initial resuscitation achieved circulatory stabilization, prognosis was not strongly associated with NTIS.KEY WORDS: Non-thyroidal illness syndrome, Massive transfusion, Trauma, Free triiodothyronine, Thyroid hormone 相似文献762.
Byambasuren Ganbaatar Daiju Fukuda Masakazu Shinohara Shusuke Yagi Kenya Kusunose Hirotsugu Yamada Takeshi Soeki Ken-ichi Hirata Masataka Sata 《Journal of atherosclerosis and thrombosis》2021,28(6):630
Aim: The bioactive lipid, sphingosine-1-phosphate (S1P), has various roles in the physiology and pathophysiology of many diseases. There are five S1P receptors; however, the role of each S1P receptor in atherogenesis is still obscure. Here we investigated the contribution of S1P receptor 2 (S1P2) to atherogenesis by using a specific S1P2 antagonist, ONO-5430514, in apolipoprotein E-deficient ( Apoe −/− ) mice. Methods: Apoe −/− mice fed with a western-type diet (WTD) received ONO-5430514 (30 mg/kg/day) or vehicle. To examine the effect on atherogenesis, Sudan IV staining, histological analysis, qPCR, and vascular reactivity assay was performed. Human umbilical vein endothelial cells (HUVEC) were used for in vitro experiments. Results: WTD-fed Apoe −/− mice had significantly higher S1P2 expression in the aorta compared with wild-type mice. S1P2 antagonist treatment for 20 weeks reduced atherosclerotic lesion development ( p <0.05). S1P2 antagonist treatment for 8 weeks ameliorated endothelial dysfunction ( p <0.05) accompanied with significant reduction of lipid deposition, macrophage accumulation, and inflammatory molecule expression in the aorta compared with vehicle. S1P2 antagonist attenuated the phosphorylation of JNK in the abdominal aorta compared with vehicle ( p <0.05). In HUVEC, S1P promoted inflammatory molecule expression such as MCP-1 and VCAM-1 ( p <0.001), which was attenuated by S1P2 antagonist or a JNK inhibitor ( p <0.01). S1P2 antagonist also inhibited S1P-induced JNK phosphorylation in HUVEC ( p <0.05). Conclusions: Our results suggested that an S1P2 antagonist attenuates endothelial dysfunction and prevents atherogenesis. S1P2, which promotes inflammatory activation of endothelial cells, might be a therapeutic target for atherosclerosis. 相似文献
763.
Tyrosine kinase receptor RON functions downstream of the erythropoietin receptor to induce expansion of erythroid progenitors 总被引:3,自引:2,他引:3 下载免费PDF全文
van den Akker E van Dijk T Parren-van Amelsvoort M Grossmann KS Schaeper U Toney-Earley K Waltz SE Löwenberg B von Lindern M 《Blood》2004,103(12):4457-4465
764.
Coronary septal collaterals as an access for the retrograde approach in the percutaneous treatment of coronary chronic total occlusions. 总被引:3,自引:0,他引:3
Jean‐François Surmely MD Osamu Katoh MD Etsuo Tsuchikane MD Kenya Nasu MD Takahiko Suzuki MD 《Catheterization and cardiovascular interventions》2007,69(6):826-832
OBJECTIVES: To investigate the feasibility and safety of the percutaneous dilatation of coronary septal collaterals and to allow its use as an access for retrograde approach to percutaneous coronary intervention (PCI) of coronary chronic total occlusions (CTOs). BACKGROUND: Despite improvements in percutaneous techniques and materials, CTO recanalization success rate is still suboptimal. The retrograde approach allows to significantly increase this success rate. However, its application via a bypass graft or epicardial collateral can potentially result in severe complications. A safer retrograde access is desired and would allow broadening the application of the retrograde approach in the percutaneous treatment of CTOs. METHODS: After a failed antegrade CTO recanalization attempt, a retrograde approach via septal collaterals was tried in 21 patients (19 males, 2 females). The septal collateral was accessed via the contralateral patent coronary artery and was crossed with a hydrophilic floppy wire. After successful wire crossing of the septal collateral, sequential low pressure dilatation was performed with a 1.25 or 1.5 mm balloon to allow the delivery of a balloon catheter up to the distal CTO site. RESULTS: Successful wire crossing and balloon dilatation of septal collaterals was achieved in 19 cases and in 17 cases, respectively. Postdilatation septal collateral diameter increased significantly reaching a mean diameter of 1.46 +/- 0.38 mm. Retrograde CTO recanalization was successfully performed in 71% of the cases. No major complications occurred. CONCLUSIONS: Coronary septal collaterals can be used as an access for the retrograde approach in the percutaneous treatment of CTOs. 相似文献
765.
Sonjia Kenya Jamal Jones Kristopher Arheart Erin Kobetz Natasha Chida Shelly Baer Alexis Powell Stephen Symes Tai Hunte Anne Monroe Olveen Carrasquillo 《AIDS and behavior》2013,17(9):2927-2934
AIDS-related mortality remains a leading cause of preventable death among African-Americans. We sought to determine if community health workers could improve clinical outcomes among vulnerable African-Americans living with HIV in Miami, Florida. We recruited 91 medically indigent persons with HIV viral loads ≥1,000 and/or a CD4 cell count ≤350. Patients were randomized to a community health worker (CHW) intervention or control group. Viral load and CD4 cell count data were abstracted from electronic medical records. At 12 months, the mean VL in the intervention group was log 0.9 copies/μL lower than the control group. The CD4 counts were not significantly different among the groups. Compared to the control group, patients randomized to CHWs experienced statistically significant improvements in HIV viral load. Larger multi-site studies of longer duration are needed to determine whether CHWs should be incorporated into standard treatment models for vulnerable populations living with HIV. 相似文献
766.
Nobunori Takahashi Toshihisa Kojima Kenya Terabe Atsushi Kaneko Daihei Kida Yuji Hirano Takayoshi Fujibayashi Yuichiro Yabe Hideki Takagi Takeshi Oguchi Hiroyuki Miyake Takefumi Kato Naoki Fukaya Hisato Ishikawa Masatoshi Hayashi Seiji Tsuboi Daizo Kato Koji Funahashi Hiroyuki Matsubara Yosuke Hattori Masahiro Hanabayashi Shinya Hirabara Yutaka Yoshioka Naoki Ishiguro 《Modern rheumatology / the Japan Rheumatism Association》2013,23(5):904-912
Objectives
The purpose of this study was to examine the treatment retention and efficacy of abatacept, the first member of a new class of biologic agents, in Japanese rheumatoid arthritis (RA) patients during clinical practice.Methods
A retrospective multicenter study was conducted with patients who underwent abatacept therapy for 24 weeks (n = 143).Results
Patients at baseline had a mean age of 63.5 years, a mean disease duration of 11.3 years, and a mean disease activity score in 28 joints (DAS28) of 4.5. Overall retention of abatacept treatment was 83.2 % at 24 weeks, when 46.2 % of patients achieved DAS28-defined low disease activity (LDA; DAS28 <3.2) and 26.6 % achieved DAS28-defined remission (DAS28 <2.6). LDA was achieved in a significantly higher proportion of patients without prior biologics therapy compared to those with prior biologics (60.9 vs. 34.2 %, p = 0.001). There was no significant difference between patients with or without concomitant methotrexate (MTX) therapy (45.2 vs. 47.5 %).Conclusions
Abatacept therapy appears to be highly effective and well tolerated during clinical treatment of RA. Abatacept was particularly effective in patients with no history of biologics use, and did not appear to be dependent on concomitant MTX therapy. 相似文献767.
Tsuyoshi Ito Yoriyasu Suzuki Mariko Ehara Hitoshi Matsuo Tomohiko Teramoto Mitsuyasu Terashima Kenya Nasu Yoshihisa Kinoshita Etsuo Tsuchikane Takahiko Suzuki Genjiro Kimura 《International journal of cardiology》2013
Background
This study sought to evaluate the prevalence of coronary artery disease (CAD) and the impact of epicardial fat volume (EFV) on CAD in symptomatic patients with a zero calcium score (CS) using multislice computed tomography (MSCT).Methods
In this study, 1308 consecutive symptomatic patients who underwent 64-slice MSCT with a zero CS were evaluated. EFV was quantified with CS data sets. Presence of an obstructive plaque (diameter stenosis > 50%) and a CT-derived vulnerable plaque, which was defined as a plaque with remodeling index > 1.10 and mean CT density value < 30 HU, was assessed with a CT coronary angiography.Results
Obstructive plaques were detected in 86 patients (7%) and CT-derived vulnerable plaques in 63 (5%). EFV was larger in patients with obstructive plaques than no plaque (124.3 ± 43.2 cm3 vs. 95.1 ± 40.3 cm3; p < 0.01). Patients with CT-derived vulnerable plaques had a greater amount of EFV than no plaque (133.0 ± 40.2 cm3 vs. 95.1 ± 40.3 cm3; p < 0.01). Multivariate analysis revealed EFV as a predictor of the presence of an obstructive and a CT-derived vulnerable plaque (per 10 cm3; Odds ratio (OR) 1.10; 95% confidence interval (CI), 1.04-1.16; p < 0.01 and OR 1.19; 95% CI, 1.12-1.27; p < 0.01). The combination of EFV and Framingham risk score (FRS) resulted in an area under the receiver-operating characteristic curve for prediction of obstructive and CT-derived vulnerable plaque of 0.75 and 0.75, which was significantly higher than 0.68 and 0.64 for FRS alone (p = 0.02 and p < 0.01).Conclusions
A zero CS doesn't exclude CAD and EFV can be a useful marker of CAD in symptomatic zero CS patients. 相似文献768.
Atsushi Ono Kenya Murase Toshitaka Taniguchi Osamu Shibutani Satoru Takata Yasuyuki Kobashi Mitsue Miyazaki 《Magnetic resonance in medicine》2009,61(4):907-917
Three noncontrast‐enhanced MR venography techniques are presented for assessing deep vein thrombosis (DVT) at 0.5T in patients with metallic implants. Two cardiac‐gated 3D half‐Fourier FSE fresh blood imaging sequences with flow‐refocusing pulses (FR‐FBI) in the read‐out (RO) direction and without FR pulses (non‐FR‐FBI) were developed for slower‐flowing blood. For faster flowing blood, a swap phase‐encode arterial double‐subtraction elimination (SPADE) technique was developed. The three techniques were assessed both quantitatively using signal‐to‐noise (SNR) and contrast‐noise‐ratio (CNR) measurements and qualitatively by subjective image analysis in 15 volunteers. SPADE was compared to FR‐FBI in the pelvic veins and FR‐FBI was compared to non‐FR‐FBI in the thigh and calf veins. Both SPADE and FR‐FBI techniques produced significantly higher SNRs, CNRs, and image quality in each comparative study (P < 0.001). Five patients with metallic implants and confirmed DVT underwent SPADE (pelvic veins) and FR‐FBI (thigh and calf veins) examinations and the results were compared to conventional venography. The SPADE and FR‐FBI images showed all DVTs from all five patients without interference from implant susceptibility artifacts. The excellent image quality produced by both SPADE and FR‐FBI throughout peripheral vasculature demonstrates their promise for detecting DVT in postsurgery patients. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc. 相似文献
769.
Masato Narita Etsuro Hatano Nobuyuki Tamaki Kenya Yamanaka Atsuko Yanagida Hiromitsu Nagata Hiroyuki Asechi Yasutsugu Takada Iwao Ikai Shinji Uemoto 《Journal of gastroenterology and hepatology》2009,24(6):1051-1057
Background and Aim: Sinusoidal obstruction syndrome (SOS) is drug-induced liver injury that occurs in patients who receive hematopoietic cell transplantation and oxaliplatin-contained chemotherapy. The aim of study was to investigate the pharmacological treatment of SOS using a traditional Japanese medicine, Dai-kenchu-to (DKT).
Methods: Male Sprague-Dawley rats were treated with monocrotaline (MCT) to induce SOS. The rats were divided into three groups: control, MCT and MCT+DKT groups. In the MCT+DKT group, DKT was gavaged at 12 h after MCT treatment and given every 12 h until the end of the protocol. The rats of MCT group were treated with water instead of DKT. At 48 h after MCT treatment, blood and liver samples were collected.
Results: In the MCT+DKT group, the macroscopic and histological findings revealed liver congestion, sinusoidal alteration and the destruction of sinusoidal lining, which were comparable with those of the MCT group. However, the area of hepatic necrosis and serum AST levels significantly decreased in the MCT+DKT group compared with those of the MCT group. Treatment with DKT resulted in the reduction of neutrophil accumulation, myeloperoxidase activity and the expression of cytokine-induced neutrophil chemoattractant (CINC) and intracellular adhesion molecule-1 (ICAM-1) mRNA in the liver compared with those of the MCT group. Treatment with processed ginger, one of the ingredients in DKT, resulted in similar effects to those shown by DKT.
Conclusions: Dai-kenchu-to attenuates MCT-induced liver injury by preventing neutrophil-induced liver injury through blockage of upregulation of CINC and ICAM-1 mRNA level. 相似文献
Methods: Male Sprague-Dawley rats were treated with monocrotaline (MCT) to induce SOS. The rats were divided into three groups: control, MCT and MCT+DKT groups. In the MCT+DKT group, DKT was gavaged at 12 h after MCT treatment and given every 12 h until the end of the protocol. The rats of MCT group were treated with water instead of DKT. At 48 h after MCT treatment, blood and liver samples were collected.
Results: In the MCT+DKT group, the macroscopic and histological findings revealed liver congestion, sinusoidal alteration and the destruction of sinusoidal lining, which were comparable with those of the MCT group. However, the area of hepatic necrosis and serum AST levels significantly decreased in the MCT+DKT group compared with those of the MCT group. Treatment with DKT resulted in the reduction of neutrophil accumulation, myeloperoxidase activity and the expression of cytokine-induced neutrophil chemoattractant (CINC) and intracellular adhesion molecule-1 (ICAM-1) mRNA in the liver compared with those of the MCT group. Treatment with processed ginger, one of the ingredients in DKT, resulted in similar effects to those shown by DKT.
Conclusions: Dai-kenchu-to attenuates MCT-induced liver injury by preventing neutrophil-induced liver injury through blockage of upregulation of CINC and ICAM-1 mRNA level. 相似文献
770.