全文获取类型
收费全文 | 2591篇 |
免费 | 110篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 56篇 |
儿科学 | 36篇 |
妇产科学 | 18篇 |
基础医学 | 208篇 |
口腔科学 | 31篇 |
临床医学 | 117篇 |
内科学 | 710篇 |
皮肤病学 | 14篇 |
神经病学 | 242篇 |
特种医学 | 86篇 |
外科学 | 492篇 |
综合类 | 4篇 |
预防医学 | 65篇 |
眼科学 | 19篇 |
药学 | 174篇 |
中国医学 | 12篇 |
肿瘤学 | 428篇 |
出版年
2023年 | 19篇 |
2022年 | 40篇 |
2021年 | 45篇 |
2020年 | 16篇 |
2019年 | 45篇 |
2018年 | 54篇 |
2017年 | 46篇 |
2016年 | 50篇 |
2015年 | 61篇 |
2014年 | 76篇 |
2013年 | 72篇 |
2012年 | 95篇 |
2011年 | 166篇 |
2010年 | 116篇 |
2009年 | 70篇 |
2008年 | 125篇 |
2007年 | 168篇 |
2006年 | 156篇 |
2005年 | 134篇 |
2004年 | 175篇 |
2003年 | 134篇 |
2002年 | 143篇 |
2001年 | 81篇 |
2000年 | 68篇 |
1999年 | 65篇 |
1998年 | 28篇 |
1997年 | 20篇 |
1996年 | 17篇 |
1995年 | 13篇 |
1994年 | 10篇 |
1993年 | 11篇 |
1992年 | 45篇 |
1991年 | 43篇 |
1990年 | 39篇 |
1989年 | 29篇 |
1988年 | 31篇 |
1987年 | 23篇 |
1986年 | 29篇 |
1985年 | 22篇 |
1984年 | 17篇 |
1983年 | 19篇 |
1980年 | 7篇 |
1979年 | 16篇 |
1978年 | 9篇 |
1977年 | 6篇 |
1976年 | 5篇 |
1974年 | 5篇 |
1971年 | 9篇 |
1970年 | 6篇 |
1967年 | 5篇 |
排序方式: 共有2712条查询结果,搜索用时 31 毫秒
91.
92.
Susie J. Goodwin Elise Randle Akane Iguchi Katherine Brown Aparna Hoskote Alistair D. Calder 《Pediatric radiology》2014,44(6):750-760
We retrospectively reviewed the imaging findings, indications, technique and clinical impact in children who had undergone chest CT while undergoing extra-corporeal membrane oxygenation (ECMO). Radiology and ECMO databases were searched to identify all 19 children who had undergone chest CT (20 scans in total) while on ECMO at our institution between May 2003 and May 2012. We reviewed all CT scans for imaging findings. Chest CT is performed in a minority of children on ECMO (4.5% in our series). Timing of chest CT following commencement of ECMO varied among patient groups but generally it was performed earlier in the neonatal group. Clinically significant imaging findings were found in the majority of chest CT scans. Many scans contained several findings, with most cases demonstrating parenchymal or pleural abnormalities. Case examples illustrate the spectrum of imaging findings, including underlying pathology such as necrotising pneumonia and severe barotrauma, and ECMO-related complications such as tension haemothoraces and cannula migration. The results of chest CT led to a change in patient management in 16 of 19 children (84%). There were no adverse events related to patient transfer. An understanding of scan technique and awareness of potential findings is important for the radiologist to provide prompt and optimal image acquisition and interpretation in appropriate patients. 相似文献
93.
Yuh Hasegawa Bazar Amarsaikhan Netrporn Chinvipas Shin-Ichi Tsukada Kazuto Terada Satoshi Uzuka Wataru Miyashita Satoshi Iguchi Kazuhito Arai Ikuo Kageyama Sen Nakahara 《Odontology / the Society of the Nippon Dental University》2014,102(2):167-175
The purposes of this study were to establish normative data for mesiodistal tooth crown diameters and arch dimensions in Mongolian adults and to compare them with those of Japanese adults. The study materials comprised dental casts of 100 modern Mongolian and 100 Japanese subjects (50 males, 50 females for each) with Angle Class I normal occlusion. The mean ages were 20 years 8 months for the Mongolian subjects and 20 years 0 months for the Japanese subjects. On the dental casts, the mesiodistal tooth crown diameters (excluding wisdom teeth) and dental arch dimensions were measured. The following arch dimensions were measured: inter-canine lingual, inter-premolar lingual, inter-molar lingual, inter-molar central, coronal arch length, basal arch length, and basal arch width. In the Mongolian samples, significant sex differences were noted, and most of the items were significantly larger in males than in females. Significant differences between the Mongolian and Japanese samples were mainly noted in the premolar and molar regions, rather than in the anterior region, and were significantly smaller in the Mongolian samples. In the Mongolian samples, the molar section widths and basal arch width and length were significantly larger in males and females compared with the Japanese samples. These results suggest that the tooth crown size and arch dimensions in the Mongolian samples differed from those in the Japanese samples, and that establishment of the clinical norm for Mongolian adults might be helpful in formulating treatment plans for Mongolian patients, given that these parameters are the basic tools for diagnosis. 相似文献
94.
95.
96.
Daisuke Suzuki Ryoji Kobayashi Akihiro Iguchi Hirozumi Sano Kenji Kishimoto Kazue Yasuda Kunihiko Kobayashi 《International journal of hematology》2014,100(5):485-489
Posterior reversible encephalopathy syndrome (PRES) is a neurological disorder characterized by seizures, altered mental status and visual disorders, along with characteristic radiological findings. It is strongly related to hypertension induced by steroids and other immunosuppressive agents. There are an increasing number of reports regarding PRES arising during the course of chemotherapy for hematological malignancies. To clarify the risk factors for this phenomenon, we retrospectively analyzed pediatric patients undergoing treatment for hematological malignancies. Of 161 patients, six patients (3.7 %) developed PRES with characteristic clinical and radiographic findings. Univariate analysis revealed that tumor lysis syndrome (TLS) was a significant risk factor for the onset of PRES. TLS is a significant risk factor for the development of PRES in pediatric patients receiving chemotherapy for hematological malignancies. 相似文献
97.
Naoki Saji Kazumi Kimura Yohei Tateishi Shigeru Fujimoto Nobuyuki Kaneko Takao Urabe Akira Tsujino Yasuyuki Iguchi daVinci Study Group 《Journal of thrombosis and thrombolysis》2016,42(4):453-462
The safety and efficacy of non-vitamin K oral anticoagulant (NOAC) compared with warfarin in treating patients with non-valvular atrial fibrillation (NVAF) who developed acute ischemic stroke or transient ischemic attack (AIS/TIA), particularly those receiving tissue-plasminogen activator (tPA) therapy, remains unclear. Between April 2012 and December 2014, we conducted a multicenter prospective cohort study to assess the current clinical practice for treating such patients. We divided the patients into two groups according to the administration of oral anticoagulants (warfarin or NOACs) and tPA therapy. The risk of any hemorrhagic or ischemic event was compared within 1 month after the onset of stroke. We analyzed 235 patients with AIS/TIA including 73 who received tPA therapy. Oral anticoagulants were initiated within 2–4 inpatient days. NOACs were administered to 49.8 % of patients, who were predominantly male, younger, had small infarcts, lower NIHSS scores, and had a lower all-cause mortality rate (0 vs. 4.2 %, P = 0.06) and a lower risk of any ischemic events (6.0 vs. 7.6 %, P = 0.797) compared with warfarin users. The prevalence of all hemorrhagic events was equivalent between the two groups. Early initiation of NOACs after tPA therapy appeared to lower the risk of hemorrhagic events, although there was no significant difference (0 vs. 5.6 %, P = 0.240). Although more clinicians are apt to prescribe NOACs in minor ischemic stroke, NOAC treatment may provide a potential benefit in such cases. Early initiation of NOACs after tPA therapy may reduce the risk of hemorrhagic events compared with warfarin. 相似文献
98.
Iguchi S Kudo H Saito T Ogawa M Saito H Otsuka K Funakubo A Mitsubayashi K 《Biomedical microdevices》2007,9(4):603-609
A flexible and wearable amperometoric glucose sensor was fabricated and tested. Also, the sensor was utilized to tear glucose
monitoring. The sensor was constructed by immobilizing GOD onto a flexible oxygen electrode (Pt working electrode and Ag/AgCl
counter/reference electrode), which was fabricated using “Soft-MEMS” techniques onto a functional polymer membrane. In purpose
of bioinstrumentation, adhesive agents were not used for constructing the flexible biosensor. Linear relationship between
glucose concentration and output current was obtained in a range of 0.025–1.475 mmol/l, with a correlation coefficient of
0.998. Current dependences on pH and temperature were also evaluated. The current was largest at pH 7.0 and the current increased
when temperature increased. This indicates that the output current depends on enzyme activity. Based on the basic characteristics
investigation, the glucose sensor was applied to measurement of glucose in tear fluids on an eye site of a Japan white rabbit.
The change of tear glucose level induced by oral-administration of glucose was monitored as a current change of the sensor
attached on the eye site. In this investigation, the tear glucose level varied from 0.16 to 0.46 mmol/l. Although there was
a delay of several tens of minutes towards blood sugar level, it is considered to be possible that non-invasive continuous
glucose monitoring can be realized using the flexible biosensor. 相似文献
99.
Daisaku Ito Yuta Yamamoto Takao Maekita Naoko Yamagishi Shuji Kawashima Takanori Yoshikawa Kensuke Tanioka Takeichi Yoshida Mikitaka Iguchi Kosei Kunitatsu Yoshimitsu Kanai Seiya Kato Masayuki Kitano 《Medicine》2022,101(8)
Goals:We examined whether synbiotics enhance improvement by probiotics.Background:Probiotics, which are beneficial microbacteria, are a nutritional intervention for treatment of functional constipation or its tendency. Prebiotics, meanwhile, can promote the proliferation of probiotics in the gastrointestinal tract and enhance their beneficial effects. Synbiotics, a combination of probiotics and prebiotics, may be superior to probiotics in the treatment of defecation-related symptoms, but this requires elucidation.Study:This randomized, double-blind, placebo-controlled study enrolled 69 healthy adults with constipation tendency. Participants were allocated to either control, probiotics, or synbiotics groups and they recorded details of their defecations and their condition. The first 2 weeks were the observation period and the latter 2 weeks were the intervention period, in which participants took test foods. Probiotic foods included Bifidobacterium longum NT strain (1010 CFU/day), synbiotic foods included the NT strain (1010 CFU/day) and galactooligosaccharide (1 g/day). Placebo foods contained the vehicle only. Participants answered questionnaires (Patient Assessment on Constipation Symptoms [PAC-SYM], and one on dietary history) on the last day of each period.Results:Nine participants withdrew consent, and 2 of the remaining 60 had missing data. Age, body mass index, and sex were not significantly different between the 3 groups. Frequency of bowel movements in the fourth week, the primary endpoint, was not increased in the probiotics or synbiotics groups compared with the control group, and the frequency of bowel movements and days with defecation were not changed by probiotics or synbiotics during the intervention period. Probiotics and synbiotics did not improve stool conditions, although incomplete defecation was improved by probiotics but not by synbiotics compared with placebo. PAC-SYM indicated that stool condition and total scores were improved by probiotics but not by synbiotics during the intervention compared with placebo.Conclusion:The probiotic strain Bifidobacterium longum NT can improve constipation symptoms, especially stool condition, but it does not increase bowel movement frequency in healthy adults with constipation tendency. Synbiotics treatment seemed to diminish this improvement of constipation induced by probiotics. This study indicates the possibility of attenuation of beneficial effects from probiotics by the use of synbiotics, contrary to synbiotics theory. 相似文献
100.
Yoshiaki?Shinden Akihiro?NakajoEmail author Hideo?Arima Kiyonori?Tanoue Munetsugu?Hirata Yuko?Kijima Kosei?Maemura Shoji?Natsugoe 《World journal of surgery》2017,41(6):1506-1512