全文获取类型
收费全文 | 6548篇 |
免费 | 709篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 163篇 |
儿科学 | 419篇 |
妇产科学 | 213篇 |
基础医学 | 577篇 |
口腔科学 | 524篇 |
临床医学 | 649篇 |
内科学 | 1300篇 |
皮肤病学 | 157篇 |
神经病学 | 464篇 |
特种医学 | 258篇 |
外科学 | 1467篇 |
综合类 | 33篇 |
一般理论 | 1篇 |
预防医学 | 268篇 |
眼科学 | 179篇 |
药学 | 350篇 |
中国医学 | 9篇 |
肿瘤学 | 232篇 |
出版年
2024年 | 12篇 |
2023年 | 139篇 |
2022年 | 74篇 |
2021年 | 214篇 |
2020年 | 173篇 |
2019年 | 204篇 |
2018年 | 421篇 |
2017年 | 324篇 |
2016年 | 409篇 |
2015年 | 403篇 |
2014年 | 418篇 |
2013年 | 817篇 |
2012年 | 357篇 |
2011年 | 351篇 |
2010年 | 417篇 |
2009年 | 220篇 |
2008年 | 119篇 |
2007年 | 54篇 |
2006年 | 205篇 |
2005年 | 144篇 |
2004年 | 67篇 |
2003年 | 62篇 |
2002年 | 84篇 |
2001年 | 139篇 |
2000年 | 107篇 |
1999年 | 132篇 |
1998年 | 132篇 |
1997年 | 102篇 |
1996年 | 132篇 |
1995年 | 83篇 |
1994年 | 93篇 |
1993年 | 80篇 |
1992年 | 57篇 |
1991年 | 58篇 |
1990年 | 44篇 |
1989年 | 25篇 |
1988年 | 33篇 |
1987年 | 15篇 |
1986年 | 24篇 |
1985年 | 21篇 |
1984年 | 27篇 |
1983年 | 21篇 |
1982年 | 26篇 |
1981年 | 26篇 |
1980年 | 22篇 |
1979年 | 19篇 |
1978年 | 10篇 |
1977年 | 10篇 |
1976年 | 12篇 |
1974年 | 11篇 |
排序方式: 共有7263条查询结果,搜索用时 31 毫秒
21.
Summary The serratus anterior muscle in the rat is supplied by the serratus division of thoracodorsal vessels, in a pattern similar to man [2]. The serratus anterior muscles were transferred to the groin area as a free muscle flap in 17 rats and as a free muscle graft in 13 rats. In the free muscle flap group, the serratus anterior muscles of 8 of 10 rats survived; histological examination showed them to be viable and the vascular anastomoses were patent at the 30th day. In the free muscle graft group, all of the muscle grafts became necrotic. As a result, it is concluded that the microvascular transfer of serratus anterior muscles in rats is a useful small animal model for microsurgical laboratory training of clinical free flap transfers and also for performing pharmacological and biochemical studies in transplanted muscle. 相似文献
22.
23.
Dr Ö. Özdamar C. N. Lopez D. K. Oller R. E. Eilers E. Miskiel Dr M. P. Lynch 《Medical & biological engineering & computing》1992,30(2):213-218
A microprocessor-based real-time digital vibrotactile vocoder system has been developed to train the deaf and for artificial
hearing research. The system is composed of a microcomputer module with a digital signal processor interface units and an
attenuator/driver circuit. Live or digitised (stored or synthetic) speech is presented to the skin spectrally through a belt
housing eight or 16 vibrators. Speech is processed in real time using a fast Fourier transform. The system is also capable
of presenting any arbitrary spatiotemporal pattern on the skin for artificial hearing experiments. A preliminary experiment
with a deaf subject indicates that the system is potentially an effective device for artificial hearing. 相似文献
24.
Dr. Bektaş Açikgöz Mehmet Turgut Osman Ekin Özcan Tunçalp Özgen Beyhan Demirhan Şevket Ruacan 《Lasers in medical science》1992,7(1-4):49-53
In this study we have investigated the negative influence of CO2 and Nd-YAG laser irradiation on rapid cranial regeneration and whether it has any use in certain types of craniosynostosis.
Twenty-two newborn rats were used in the study. Both CO2 and Nd-YAG laser irradiation, which was applied to free bony edges after, suturectomies, resulted in a significant decrease
in skull regeneration. Histopathological examinations revealed severe degeneration caused by both types of laser energies. 相似文献
25.
Özgür Aydin 《Langenbeck's archives of surgery / Deutsche Gesellschaft fur Chirurgie》2007,392(1):105-109
Introduction Scar endometriosis develops in and is adjacent to surgical scars at the site of previous abdominal operations. The most frequent
clinical presentation of the disease is that of a palpable subcutaneous mass near surgical scars associated with cyclic pain
and swelling during menses. Endometriosis of the surgical scar is often referred to the general surgeons because the clinical
presentation suggests an incisional hernia or other conditions related to the general surgery. Cyclical symptoms such as pain
and swelling, in relation to surgical scars, which worsen at the time of menstruation, are nearly pathognomonic of scar endometriosis.
However, often the diagnosis of endometriosis is not suggested until after histology has been performed.
Case report We present two cases of cutaneous endometriosis that has occurred on the site of previous cesarean section scar area. 相似文献
26.
The main goal of the present work was to longitudinally examine consequences of long‐term moderately elevated levels of stress for various health outcomes. To address this issue, data covering 10 years was used from the ongoing Swedish population‐based prospective Betula Study. Based on the ratings on a validated self‐reported stress scale, matched subsamples between 40 and 65 years of age were divided into a high (n = 137) and low (n = 211) stress group. The reported incidence of cardiovascular, diabetes, psychiatric, tumour and musculoskeletal diseases was assessed 5 and 10 years after baseline (baseline = 1993–1995) without contaminating effects of past health history. The incidence of diseases 5 years after baseline assessment showed no differences between the groups. After 10 years, there was a significantly higher incidence of psychiatric diseases, mainly depression in the high‐stress group as well as a significant effect for tumours, although the number of cases was low. Although moderately elevated stress level may have a possible impact on psychiatric diseases especially depression and some tumours, it seems that prolonged moderate stress does not appear to be harmful to other stress‐related diseases. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
27.
Jürgen Treckmann Andreas Paul Georgios C. Sotiropoulos Hauke Lang Arzu Özcelik Fuat Saner Christoph E. Broelsch 《Journal of gastrointestinal surgery》2008,12(2):313-318
Introduction Delayed massive hemorrhage induced by pancreatic fistula after pancreaticoduodenectomy is a rare but life-threatening complication.
The purpose of this study was to analyze the clinical course of patients with late hemorrhage, with or without sentinel bleeding,
to better define treatment options in the future.
Material and Methods From April 1998 to December 2006, 189 pancreaticoduodenectomies were performed. Eleven patients, including two patients referred
from other hospitals, were treated with delayed massive hemorrhage occurring 5 days or more after pancreaticoduodenectomy.
Sentinel bleeding was defined as minor blood loss via surgical drains or the gastrointestinal tract with an asymptomatic interval
until development of hemorrhagic shock. The clinical data of patients with bleeding episodes were analyzed retrospectively.
Results Eight of the 11 patients had sentinel bleeding, and seven of them had it at least 6 h before acute deterioration. Seven out
of 11 patients died, five out of eight with sentinel bleeding. No differences could be detected between patients with or without
sentinel bleeding before delayed massive hemorrhage. The only difference found was that non-surviving patients were significantly
older than surviving patients. Delayed massive hemorrhage is a common cause of death after pancreaticoduodenostomy complicated
by pancreatic fistula formation. The observation of sentinel bleeding should lead to emergency angiography and dependent from
the result to emergency relaparotomy to increase the likelihood of survival. 相似文献
28.
Kemal Gündüz Nazmİ Zengİn Süleyman Okudan Mehmet Okka Nİlgün Özbayrak 《Documenta ophthalmologica. Advances in ophthalmology》1995,91(2):155-164
We recorded pattern electroretinograms and visual evoked potentials in a group of selected patients with unilateral uncomplicated branch retinal vein occlusion. To document the effects of preexisting risk factors, patients were divided into three groups: diabetes mellitus, hypertension with hyperlipidemia and no systemic disease. The transient and steady-state pattern electroretinogram and visual evoked potential amplitudes were significantly reduced and visual evoked potential peak times were delayed relative to the fellow eyes and agematched normal subjects. There was a second amplitude reduction relative to the other patient groups in both the affected and fellow eyes of the diabetes mellitus group, which was indicative of an additive effect of diabetes mellitus.Abbreviations BRVO
branch retinal vein occlusion 相似文献
29.
Iatrogenic injuries to ureter, bladder and urethra during abdominal and pelvic operations 总被引:1,自引:0,他引:1
Ö Polat O. Gül Y. Aksoy I. Özbey A. Demirel Y. Bayraktar 《International urology and nephrology》1997,29(1):13-18
Abdominal and pelvic operations at Departments of Obstetrics and Gynaecology, and General Surgery play an important role in
ureteral, bladder and rarely urethral injuries.
Fifty-nine patients with iatrogenic ureteral, bladder and urethral injuries were treated at the Department of Urology, Atatürk
University Research Hospital, between 1985 and 1995. These injuries were urinary vaginal fistulas in 43 patients (vesicovaginal
33, ureterovaginal 7, urethrovaginal 2 and vesicovaginal plus urethrovaginal 1), ureteric ligation in 9, bladder laceration
in 7. These injuries were treated by different methods. All patients were followed up by intravenous urography (IVU) and urine
culture three months later.
It must be borne in mind that iatrogenic urinary tract injuries are not rare. Bladder and ureteral catheterization must be
performed to prevent these complications. 相似文献
30.