全文获取类型
收费全文 | 1521篇 |
免费 | 117篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 34篇 |
妇产科学 | 70篇 |
基础医学 | 194篇 |
口腔科学 | 8篇 |
临床医学 | 270篇 |
内科学 | 166篇 |
皮肤病学 | 55篇 |
神经病学 | 200篇 |
特种医学 | 33篇 |
外科学 | 216篇 |
综合类 | 27篇 |
一般理论 | 2篇 |
预防医学 | 147篇 |
眼科学 | 7篇 |
药学 | 125篇 |
肿瘤学 | 89篇 |
出版年
2023年 | 9篇 |
2022年 | 10篇 |
2021年 | 23篇 |
2020年 | 19篇 |
2019年 | 19篇 |
2018年 | 28篇 |
2017年 | 26篇 |
2016年 | 27篇 |
2015年 | 20篇 |
2014年 | 31篇 |
2013年 | 59篇 |
2012年 | 79篇 |
2011年 | 96篇 |
2010年 | 55篇 |
2009年 | 51篇 |
2008年 | 71篇 |
2007年 | 81篇 |
2006年 | 79篇 |
2005年 | 82篇 |
2004年 | 64篇 |
2003年 | 68篇 |
2002年 | 75篇 |
2001年 | 54篇 |
2000年 | 50篇 |
1999年 | 48篇 |
1998年 | 29篇 |
1997年 | 16篇 |
1996年 | 17篇 |
1995年 | 13篇 |
1994年 | 11篇 |
1993年 | 9篇 |
1992年 | 40篇 |
1991年 | 28篇 |
1990年 | 18篇 |
1989年 | 22篇 |
1988年 | 19篇 |
1987年 | 19篇 |
1986年 | 13篇 |
1985年 | 14篇 |
1984年 | 7篇 |
1983年 | 11篇 |
1981年 | 9篇 |
1980年 | 8篇 |
1979年 | 11篇 |
1977年 | 7篇 |
1973年 | 7篇 |
1972年 | 6篇 |
1971年 | 11篇 |
1970年 | 8篇 |
1969年 | 12篇 |
排序方式: 共有1650条查询结果,搜索用时 15 毫秒
1.
In the first part of this series on issues in ward management facing charge nurses, Helen Evers addresses the problem of communication between hospital and community on patient discharges. Recent years have seen the development of liaison and co-ordinator posts whose incumbents aim to facilitate planned and organised discharge procedures, but the appointment of such personnel may not provide a complete answer to the problem. The ultimate arbiter of effective transition from hospital to home is more likely to be the quality of communication between charge and district nurse. 相似文献
2.
Martin A Ritter Achim Frese Rainer Dziewas Stefan Knecht Stefan Evers 《Movement disorders》2006,21(10):1787-1788
Synkinesias secondary to nerve lesions and aberrant re-innervation are well-known phenomena especially after lesions of the facial nerve. Synkinesias can successfully be treated with botulinum toxin A (BTx A). Synkinesias of the cremaster muscle have not been described or treated to date. We present the case of a 62-year-old man who developed synkinesias of both cremaster muscles after extensive laparatomy for esophageal cancer. Treatment of synkinesias with various oral medications had been unsuccessful. Electromyography-guided injections of BTx A in both cremaster muscles (15 MU on the right and 10 on the left) led to significant symptom relief for an average of 8 weeks. We present the case including pre- and posttreatment video clips. 相似文献
3.
Causes for failure of pregnancy after tubal reconstructive surgery are incompletely understood. The impact of microsurgical resection reanastomosis on ovum recovery was studied in the rabbit oviduct. One hundred sixty rabbits were divided into three groups: one experimental group in which a resection reanastomosis was made in the ampullar or isthmic tubal segment, respectively, and two control groups. After mating, ovum recovery was evaluated. In ampullary operated oviducts the ovum recovery rate was significantly lower compared with recovery rates in isthmically operated and in control oviducts. Furthermore, in ampullary operated oviducts peritoneal transmigration of ova was frequently observed. Disturbances in ovum pickup from the ovarian surface or the peritoneal cavity seem to be responsible for the decrease in recovery rate found in the ampullary operated oviducts. 相似文献
4.
The effect of halothane on isolated calcium (Ca2+) current of clonal (GH3) pituitary cells was investigated using standard whole-cell clamp techniques at room temperature. Halothane (0.1-5.0 mM) reversibly reduced both the low-threshold, transient [low-voltage-activated (LVA)] component and the high-threshold [high-voltage-activated (HVA)] component of Ca2+ current. Halothane had little effect on the voltage dependence of activation or inactivation of either component of Ca2+ current. Inhibition of the peak high-threshold Ca2+ current was half-maximal at about 0.8 mM halothane, with maximal inhibition (100%) occurring with 5 mM halothane. When measured at the end of a 190-msec command step, half-maximal reduction of high-threshold current occurred at less than 0.5 mM halothane. The low-threshold transient current was less sensitive to halothane, with half-maximal inhibition of peak transient current activated at -30 mV occurring at approximately 1.3 mM. The effect of halothane on the HVA current was apparently not mediated by changes in intracellular Ca2+ concentration. The ability of halothane to inhibit Ca2+ current was unaffected by either the inclusion of the rapid Ca2+ buffer 1,2-bis(2-aminophenoxy)ethane N,N,N',N'-tetraacetic acid (BAPTA) in the recording pipette or exposure of the cell to 10 mM caffeine. To assess the selectivity of the effect of halothane, the actions of halothane on two components of voltage-activated potassium (K+) current observed in the absence of extracellular Ca2+ and on voltage-dependent sodium (Na+) current were also examined. Halothane had no effect on the voltage-dependent, inactivating K+ current of GH3 cells at concentrations up to 1.2 mM. In contrast, the non-inactivating K+ current, though less sensitive to halothane than either Ca2+ current, was reduced by about 40% by 1.2 mM halothane at +20 mV. Peak Na+ current was also blocked by halothane, but 50% block required around 2.6 mM halothane with little effect at 1.6 mM. Reduction of Na+ current was associated with a substantial negative shift in the steady-state inactivation curve. Although the results indicate that a number of voltage-dependent ionic currents are sensitive to halothane, both components of Ca2+ current exhibit a greater sensitivity to halothane than any of three other voltage-dependent currents in GH3 cells. These results show that GH3 cell Ca2+ currents are selectively inhibited by clinically appropriate concentrations of halothane and that the reduction of Ca2+ current can account for the inhibition by halothane of TRH- or KCl-induced prolactin secretion in GH3 cells. 相似文献
5.
6.
Local treatment of difficult wounds with TCDO, a chemically stable, water-soluble compound containing oxygen in a chlorite matrix, is supposed to increase the pO2 in hypoxic wound tissue and to amplify physiological responses of phagocytes in wounds. 21 patients were assigned to two groups, treated by TCDO impregnated dressings twice a day or by TCDO combined with temporary skin coverage Epigard. Daily records of the state of the wounds with regard to exudation, wound cleansing, formation of granulation tissue and epithelisation demonstrated the therapeutic effect of TCDO in the treatment of complicated wounds when primary surgical debridement was sufficient. 相似文献
7.
Alison M Fecher Thomas J Birdas David Haybron Pavlos K Papasavas Debbie Evers Philip F Caushaj 《European journal of cardio-thoracic surgery》2004,25(4):537-540
OBJECTIVES: Patients with hematologic malignancies are frequently in need of major cardiac operations. Previous reports suggest an increased risk for perioperative complications in these immunodeficient patients. METHODS: Patients diagnosed with any type of hematologic malignancy who underwent open-heart surgery at our institution between 7/1996 and 6/2002 were identified. Their hospital charts were reviewed; demographics, perioperative data and outcomes were recorded. RESULTS: There were 24 patients (20 men, 4 women); mean age was 68+/-13 years (range 31-84 years). Ten patients had chronic lymphocytic leukemia, seven non-Hodgkin lymphomas, three multiple myeloma and one Hodgkin's disease, chronic myelocytic leukemia, hairy cell leukemia and cutaneous T-cell lymphoma each. The mean pre-operative duration of the hematologic disease was 6.6 years. Twenty-two patients underwent coronary artery bypass grafting (with valve replacement in three patients) and two patients had isolated valve replacement. There was one in-hospital death (4.1%). Twelve patients (50%) had a minor or major complication. Seven reoperations were required-five during the same admission (one for mediastinal bleeding, one for an expanding femoral pseudoaneurysm, one for acute cholecystitis and two for IACD/pacer insertion) and two within 30 days (one for deep sternal wound infection and one for leg wound infection). Mean post-operative stay was 8.2+/-5.8 days and mean ICU stay was 1.6+/-1.1 days. There were three late deaths-two were due to progression of the hematologic disease. The 3-year actuarial survival was 83%. CONCLUSIONS: Cardiac operations can be performed with acceptable mortality but significant morbidity rates in patients with hematologic malignancies. Bleeding and infectious complications are most frequently seen and usually lead to reoperations. These findings warrant caution during patient selection. 相似文献
8.
9.
10.
S Evers P Sörös R Brilla H Gerding I-W Husstedt 《Cephalalgia : an international journal of headache》1997,17(6):680-682
A 37-year old man developed an ipsilateral headache which fulfilled the criteria for cluster headache after orbital exenteration because of traumatic lesion of the bulb. The headache could be treated successfully by drugs usually applied in the therapy of cluster headache. Six similar cases of cluster headache after orbital exenteration could be identified in the literature suggesting that the eye itself is not necessarily part of the pathogenesis of cluster headache. We hypothesize that orbital exenteration can cause cluster headache by lesions of sympathetic structures. Possibly, these mechanisms are similar to those of sympathetic reflex dystrophy (Sudeck-Leriche syndrome) causing pain of the limbs. 相似文献