全文获取类型
收费全文 | 6921篇 |
免费 | 327篇 |
国内免费 | 43篇 |
专业分类
耳鼻咽喉 | 141篇 |
儿科学 | 289篇 |
妇产科学 | 171篇 |
基础医学 | 574篇 |
口腔科学 | 271篇 |
临床医学 | 618篇 |
内科学 | 1639篇 |
皮肤病学 | 124篇 |
神经病学 | 369篇 |
特种医学 | 173篇 |
外科学 | 1179篇 |
综合类 | 370篇 |
一般理论 | 4篇 |
预防医学 | 391篇 |
眼科学 | 229篇 |
药学 | 464篇 |
中国医学 | 38篇 |
肿瘤学 | 247篇 |
出版年
2023年 | 87篇 |
2022年 | 279篇 |
2021年 | 408篇 |
2020年 | 195篇 |
2019年 | 215篇 |
2018年 | 248篇 |
2017年 | 179篇 |
2016年 | 211篇 |
2015年 | 288篇 |
2014年 | 329篇 |
2013年 | 348篇 |
2012年 | 506篇 |
2011年 | 461篇 |
2010年 | 273篇 |
2009年 | 245篇 |
2008年 | 427篇 |
2007年 | 405篇 |
2006年 | 428篇 |
2005年 | 391篇 |
2004年 | 331篇 |
2003年 | 289篇 |
2002年 | 227篇 |
2001年 | 74篇 |
2000年 | 72篇 |
1999年 | 45篇 |
1998年 | 29篇 |
1997年 | 22篇 |
1996年 | 21篇 |
1995年 | 15篇 |
1994年 | 15篇 |
1993年 | 7篇 |
1992年 | 29篇 |
1991年 | 19篇 |
1990年 | 21篇 |
1989年 | 24篇 |
1988年 | 15篇 |
1987年 | 13篇 |
1986年 | 6篇 |
1985年 | 13篇 |
1984年 | 6篇 |
1983年 | 7篇 |
1981年 | 6篇 |
1980年 | 6篇 |
1979年 | 5篇 |
1977年 | 6篇 |
1974年 | 7篇 |
1973年 | 4篇 |
1972年 | 4篇 |
1970年 | 6篇 |
1969年 | 4篇 |
排序方式: 共有7291条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
Vedat Davutoglu Serdar Soydinc Abdullah Aydin Metin Karakok 《Journal of the American Society of Echocardiography》2005,18(2):185-187
The exposure to Aspergillus organisms/spores is likely common, but disease caused by tissue invasion with these fungi is uncommon and occurs primarily in the setting of immunosuppression. We report a case of rapidly advancing invasive endomyocardial aspergillosis secondary to prolonged usage of multiple broad-spectrum antibiotics in a nonimmunocompromised host. A 36-year-old cotton textile worker presented to our institution with a 3-month history of weight loss and fatigue. He reported receiving prolonged use of multiple broad-spectrum antibiotic treatment. The echocardiogram demonstrated multiple endomyocardial vegetations and a mass in the left atrium. Myocardial biopsy specimen revealed an invasive endomyocardial aspergillosis. The patient was investigated for immune deficiency including HIV, and this workup was negative. Treatment was started with amphotericin B and heparin for presumed left atrial thrombus. The patient died because of a rupture of mycotic aneurysm that resulted in cerebral hemorrhage. This case illustrates the risk of an invasive fungal infection in a nonimmunocompromised host who is a prolonged user of antibiotics in the setting of environmental exposure of opportunistic invasive fungal infections. 相似文献
6.
Chenicheri Balakrishnan Gil Altman Abdullah J Khalil 《CANADIAN JOURNAL OF PLASTIC SURGERY》2005,13(4):209-211
During lower extremity amputation, the objective is to provide a functional residual limb that permits maximum patient mobility and independence. Preservation of length of the fore part of the foot using salvageable tissue from the amputated part in young patients prevents equines deformity and revision of amputation to a higher level. This can be achieved using tissue available from the amputated part. The spare part concept in reconstructive surgery should be integrated into the trauma algorithm to avoid additional donor site morbidity. Reported here is a young adult patient with crush injuries to both feet, which resulted in amputations. A fasciocutaneous flap raised from one extremity was used to facilitate transmetatarsal amputation stump length preservation of the other extremity. 相似文献
7.
Tarik Zafer Nursal Bulent Erdogan Turgut Noyan Melih Cekinmez Betul Atalay Nevzat Bilgin 《Journal of clinical neuroscience》2007,14(4):344-348
OBJECTIVE: Gastric paresis in traumatic brain injury (TBI) hinders the effectiveness of enteral support in this patient group. In this study we have investigated the effect of metoclopramide on gastric emptying in TBI patients. METHOD: In this prospective, randomized, controlled, double-blind study, 19 TBI patients with Glasgow Coma Scale scores of 3-11 were included. In all patients, enteral nutrition was commenced with a nasogastric feeding tube within 48 hours of trauma. Patients were randomized into two groups. In the metoclopramide (M) group, 10 mg metoclopramide was delivered intravenously three times daily for 5 days. In the control (C) group, an equal volume of saline was administered. Besides demographics, gastric emptying according to a paracetamol absorption test at days 0 and 5, time to reach target nutritional requirements, gastric residues, intolerance to feeding, nutritional complications, and clinical outcomes were recorded for each patient. RESULTS: The gastric residue rates were 2.7+/-7.4 mL and 8.1+/-17.7 mL per 100 patient days for groups C and M respectively (p=0.408). Similarly, feeding intolerance and complication rates did not significantly differ between groups C and M, (respectively p=0.543 and 0.930). Gastric emptying parameters also were similar between the study groups. CONCLUSION: We were unable to document any advantage to using metoclopramide in TBI patients. Simple intragastric enteral feeding with close monitoring of the possible complications seems to be sufficient with acceptable morbidity rates. 相似文献
8.
Evren Isci Halil Ibrahim Canter Abdullah Kecik 《European journal of plastic surgery》2007,30(1):45-46
Rabbits are the experimental animals of choice in many studies including flaps, wounds, and topical trials for new pharmacological
agents. Because the topical drugs and other materials used for dressing are irritating to the animal, they tend to remove
dressings, bandages, drapes, insensate flaps, and also topical drugs by scratching, licking, and biting if they are within
the reach of the animal. In this study, we report an easy to prepare, user-friendly, comfortable, and cheap dressing protector
called a dressing shield to prevent these problems. 相似文献
9.
PURPOSE: To compare the analgesic effects of dexmedetomidine/morphine with those of tramadol/midazolam in patients undergoing extracorporeal shockwave lithotripsy (ESWL) for urinary calculi. METHODS: Sixty patients were randomized to receive either dexmedetomidine 1 micro g*kg(-1) iv followed by 0.5 micro g*kg(-1)*hr(-1) infusion together with morphine patient-controlled analgesia [(PCA); 2 mg bolus, five minutes lockout, 2 mg*hr(-1) infusion; (Group DEX)], or tramadol 1.5 mg*kg(-1) pre-mixed with midazolam 30 micro g*kg(-1) iv followed by tramadol PCA [20 mg bolus, five minute lockout, 20 mg*hr(-1) infusion; (Group TRA)]. Pain was assessed at baseline and every 15 min thereafter. Patients' and urologist's satisfaction with analgesia and sedation were determined on a seven-point scale ranging from 1 (extremely dissatisfied) to 7 (extremely satisfied). Patient's discharge time was also documented. RESULTS: Visual analogue scale scores over time were consistently lower in Group DEX compared with Group TRA (P = 0.001). Patients' satisfaction with analgesia (5 +/- 1 vs 4 +/- 2, P = 0.012) and with sedation (6 +/- 1 vs 5 +/- 1, P = 0.020), and urologist's satisfaction (6 +/- 1 vs 4 +/- 2, P = 0.001) were all higher amongst Group DEX patients compared with Group TRA. There was no difference between discharge times of patients in Group DEX compared with those in Group TRA [85 (60,115) min vs 65 (40,95) min, P = 0.069]. CONCLUSION: Dexmedetomidine in combination with morphine PCA provided better analgesia for ESWL and was associated with higher patients' and urologist's satisfaction when compared with a tramadol/midazolam PCA combination. 相似文献
10.
E Erdogan O Ongürü N Bulakbasi A Baysefer F Gezen E Timurkaynak 《Minimally invasive neurosurgery》2003,46(1):50-53
Intracerebral and intramedullary schwannomas are uncommon; but, in general, spinal intramedullary schwannomas are more frequent than intracerebral schwanomas. We present a case of right lateral ventricle schwannoma in a 21-year-old man and review the associated literature. The 21-year-old right-handed man presented with loss of the left-eye vision approximately 8 months before referral to an ophthalmologist. The patient was immediately subjected to computed tomography (CT) scan, which showed an enhanced lesion with cystic component in the right occipital horn of the lateral ventricle. And consecutively, he was admitted to our department. The tumor was evacuated via craniotomy with marked improvement in his clinical state. The postoperative course was uneventful and postoperative CT control showed no residue. On MRI control no recurrence was noted after a follow-up period of 8 years. Intracerebral schwannoma is a rare, benign neoplasm. It is usually located superficially or adjacent to a ventricle. Characteristic imaging features include cyst formation, calcification, and evidence of peritumoral edema or gliosis. The recognition of this benign and potentially curable neoplasm and its differentiation from other neoplasms, some of which have less favourable outcomes, is of obvious importance. 相似文献