全文获取类型
收费全文 | 31224篇 |
免费 | 1836篇 |
国内免费 | 548篇 |
专业分类
耳鼻咽喉 | 153篇 |
儿科学 | 115篇 |
妇产科学 | 52篇 |
基础医学 | 1781篇 |
口腔科学 | 2017篇 |
临床医学 | 2678篇 |
内科学 | 1103篇 |
皮肤病学 | 30篇 |
神经病学 | 589篇 |
特种医学 | 1860篇 |
外国民族医学 | 2篇 |
外科学 | 12571篇 |
综合类 | 5920篇 |
现状与发展 | 1篇 |
预防医学 | 1054篇 |
眼科学 | 198篇 |
药学 | 1926篇 |
59篇 | |
中国医学 | 1332篇 |
肿瘤学 | 167篇 |
出版年
2024年 | 42篇 |
2023年 | 490篇 |
2022年 | 789篇 |
2021年 | 1320篇 |
2020年 | 1419篇 |
2019年 | 1045篇 |
2018年 | 918篇 |
2017年 | 1054篇 |
2016年 | 1221篇 |
2015年 | 1111篇 |
2014年 | 2329篇 |
2013年 | 2257篇 |
2012年 | 2131篇 |
2011年 | 2333篇 |
2010年 | 1906篇 |
2009年 | 1787篇 |
2008年 | 1582篇 |
2007年 | 1607篇 |
2006年 | 1371篇 |
2005年 | 1302篇 |
2004年 | 1075篇 |
2003年 | 800篇 |
2002年 | 618篇 |
2001年 | 538篇 |
2000年 | 399篇 |
1999年 | 377篇 |
1998年 | 284篇 |
1997年 | 255篇 |
1996年 | 178篇 |
1995年 | 149篇 |
1994年 | 125篇 |
1993年 | 109篇 |
1992年 | 79篇 |
1991年 | 69篇 |
1990年 | 45篇 |
1989年 | 37篇 |
1988年 | 42篇 |
1987年 | 36篇 |
1986年 | 40篇 |
1985年 | 46篇 |
1984年 | 34篇 |
1983年 | 46篇 |
1982年 | 46篇 |
1981年 | 44篇 |
1980年 | 34篇 |
1979年 | 20篇 |
1978年 | 17篇 |
1977年 | 9篇 |
1976年 | 17篇 |
1975年 | 16篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
Paolo Schiavi Francesco Pogliacomi Massimiliano Colombo Andrea Amarossi Francesco Ceccarelli Enrico Vaienti 《Injury》2019,50(2):420-423
Introduction
Femoral neck fractures are the most frequent fractures in the elderly and hemiarthroplasty is the treatment of choice. The objective of this multicenter study is to identify predictive factors of acetabular erosion after bipolar hemiarthroplasty (surgery between 1997 and 2007) in a mobile independent population during a follow-up of ten years.Materials and methods
Data were prospectively collected and retrospectively analyzed. Inclusion criteria were: age >60 and <85 years, BMI?<?35, normal Abbreviated MiniMental Test score, ability to walk 0.8?km and live independently, non-pathological fracture, hip with no or minimal osteoarthritic changes, and availability of clinical and radiological follow-up. For each Patient were recorded: demographic data, comorbidities, time from fracture to surgery, characteristics of the implant, duration of surgery. Patients included underwent clinical and radiological follow-up.Results
Overall, 209 Patients met inclusion criteria. A press-fit implant was performed in 172 subjects; in contrast a cemented prosthesis was implanted in 37 patients. Nineteen patients underwent implant revision to total hip arthroplasty for acetabular erosion and pain. Classification of X-ray using Baker criteria showed a grade 0 in 54.5%, a grade 1 in 19.6%, a grade 2 in 18.1% and a grade 3 in 7.6%. Multivariate analysis revealed that the size of the femoral head (FH) was the only predictive factor of a higher risk of acetabular erosion. The Kaplan-Meier survival curve verified the risk of implant revision in Group 1 (FH sized >48?mm) and Group 2 (FH sized <48?mm). The probability of implant revision for acetabular erosion at ten years from surgery were 5.5% in Group 1 and 15.6% in Group 2.Conclusion
In bipolar hemiarthroplasty smaller head size lead to a polar wear implying a higher risk of acetabular erosion and migration; in our population this risk was consistent with the use of implant head <48?mm diameter. Considering the absolute risk of a smaller FH size, the surgeon must evaluate the accuracy of measurement of the caliber, since the size can be significantly underestimated. 相似文献22.
23.
24.
C.M. ODonnell N. Black K.C. McCourt M.E. McBrien M. Clarke C.C. Patterson B. Blackwood D.F. McAuley M.O. Shields 《British journal of anaesthesia》2019,122(1):120-130
Background
Perioperative studies of patients following hip fracture have large heterogeneity within their reported outcomes. This study aimed to develop a core outcome set for use in perioperative studies comparing the types of anaesthesia for hip fracture surgery.Methods
The consensus process consisted of a systematic review of the literature, three rounds of a Delphi survey, two consensus webinars, and face-to-face patient meetings.Results
The Delphi participants represented nine stakeholder groups. The numbers of participants completing Rounds 1–3 were 242, 186, and 169, respectively. Seventeen outcomes that met the predefined consensus criteria were considered at two consensus meetings. A final set of 10 core outcomes was agreed: mortality, time from injury to surgery, acute coronary syndrome, hypotension, acute kidney injury, delirium, pneumonia, orthogeriatric input, being out of bed at day 1, and pain.Conclusions
We generated a consensus-based set of core outcomes recommended for use in all perioperative trials evaluating the effects of anaesthesia for hip fracture surgery. An important next step is developing consensus-based consistency on how they should be measured.25.
C. Jiamton N. Ratreprasatsuk R. Jarayabhand A. Kritsaneephaiboon T. Apivatthakakul 《Clinical anatomy (New York, N.Y.)》2019,32(2):176-182
The aim of this study was to determine the feasibility of applying MIPO of the humerus via the posterior approach and to observe the tension of the radial nerve in different elbow positions. Two separate incisions were made on the posterior aspect of the humerus in ten fresh cadavers (20 humeri). The radial nerve was identified at the proximal incision and the distances through which the nerve could be elevated from the bone with the elbow in flexion and extension were measured. A 10‐hole extra‐articular distal humeral locking compression plate was inserted and fixed through the submuscular tunnel. The tunnel was then explored to identify any entrapment of the radial nerve and to observe the anatomical relationship of the radial nerve to the plate and bone. There was no entrapment of the radial nerve or its branches. The distances through which the radial nerve could be elevated were greater with the elbow in extension than in flexion (P < 0.01). The radial nerve crossed the medial and lateral borders of the posterior surface of the humerus at 80.1–132 mm (average 104.7 mm) and 116.6–175.5 mm (average 142.7 mm) of its total length, respectively. The axillary nerve was located at 38.7–61.7 mm (average 47.9 mm) of total humeral length. MIPO of the humerus using the posterior approach is an alternative option for treating distal humeral shaft fracture. The risk of radial nerve injury can be minimized by careful dissection in the proximal incision. Clin. Anat. 32:176–182, 2019. © 2018 Wiley Periodicals, Inc. 相似文献
26.
目的:探讨可调式外固定支具治疗第5掌骨颈骨折的可行性及有效性。方法:选取2014年1月~2017年6月我院收治的54例第5掌骨颈骨折患者作为研究对象,随机分为A组和B组,每组27例。A组行闭合复位交叉克氏针固定,B组行手法整复可调式外固定支具固定,比较两组末次随访第5掌指关节活动度和主观满意度。结果:随访4~10个月,两组患者第5掌指关节活动度(ROM)值相比较,差异无统计学意义,P0.05;两组的主观满意度相比较,差异无统计学意义,P0.05。结论:手法整复可调式外固定支具固定可为第5掌骨颈骨折提供可靠、有效的固定,有助于患者的早期功能恢复,是一种有效的治疗方法。 相似文献
27.
目的:观察垫枕法联合经皮椎体成形术治疗老年骨质疏松胸腰椎压缩性骨折的效果。方法:选择老年骨质疏松胸腰椎压缩性骨折患者 40 例,予垫枕法联合经皮椎体成形术治疗,并观察患者术前及术后 1 个月在疼痛缓解、伤椎前缘高度、后凸畸形改善的情况。 结果:40 例患者术前疼痛视觉模拟评分(visual analogue scale,VAS)(6.76±1.16)、伤椎前缘高度(16.38±2.26)mm 及 Cobb 角(22.17±3.46)?,术后 1 个月 VAS 评分(2.34±0.73)、伤体前缘高度(28.45±6.46)mm及 Cobb 角(8.43±4.34)?,术后 1 个月患者在疼痛缓解、伤椎前缘高度、后凸畸形改善等方面较术前有明显区别(P<0.05)。结论:老年骨质疏松胸腰椎压缩性骨折经垫枕法联合经皮椎体成形术治疗,可明显减轻患者疼痛,改善后凸畸形。 相似文献
28.
Hand surgery involves the surgical treatment of hand conditions and encompasses small bone fixation, arthroscopy, joint replacement and reconstruction of tendon and nerves. Complications following surgery to the hand may be due to patient factors, surgical decisions and the complex anatomy of the hand. Here we describe the complications associated with common surgical interventions for both elective and traumatic injuries to the hand. Following hand surgery, a balance between immobilisation and early range of motion is offset by the risk of wound complications, non-union of fractures and tendon re-rupture with stiffness and reduced range of motion of the digits. Superficial infection is relatively common following procedures to the hand, however long-term sequelae are rare. Implant failure, subsidence, instability and reduced range of motion are seen following arthroplasty procedures. Complex regional pain syndrome offers a significant challenge following injury to the hand and specifically after surgical procedures. Surgeons should consider the risk of particular surgical techniques, other perioperative factors and patient factors that may contribute to the development of complications following hand surgery. Patients should be adequately counselled in order to make an informed decision regarding the management of their condition. 相似文献
29.
30.