全文获取类型
收费全文 | 37833篇 |
免费 | 2533篇 |
国内免费 | 910篇 |
专业分类
耳鼻咽喉 | 906篇 |
儿科学 | 1215篇 |
妇产科学 | 442篇 |
基础医学 | 3354篇 |
口腔科学 | 1122篇 |
临床医学 | 3945篇 |
内科学 | 3519篇 |
皮肤病学 | 199篇 |
神经病学 | 1715篇 |
特种医学 | 2470篇 |
外国民族医学 | 5篇 |
外科学 | 9537篇 |
综合类 | 4934篇 |
现状与发展 | 2篇 |
一般理论 | 1篇 |
预防医学 | 2439篇 |
眼科学 | 283篇 |
药学 | 2689篇 |
31篇 | |
中国医学 | 748篇 |
肿瘤学 | 1720篇 |
出版年
2024年 | 110篇 |
2023年 | 650篇 |
2022年 | 1188篇 |
2021年 | 1597篇 |
2020年 | 1569篇 |
2019年 | 1418篇 |
2018年 | 1400篇 |
2017年 | 1331篇 |
2016年 | 1301篇 |
2015年 | 1291篇 |
2014年 | 2552篇 |
2013年 | 2593篇 |
2012年 | 2227篇 |
2011年 | 2421篇 |
2010年 | 1922篇 |
2009年 | 1851篇 |
2008年 | 1889篇 |
2007年 | 1888篇 |
2006年 | 1674篇 |
2005年 | 1445篇 |
2004年 | 1221篇 |
2003年 | 991篇 |
2002年 | 810篇 |
2001年 | 728篇 |
2000年 | 571篇 |
1999年 | 557篇 |
1998年 | 490篇 |
1997年 | 430篇 |
1996年 | 349篇 |
1995年 | 311篇 |
1994年 | 271篇 |
1993年 | 221篇 |
1992年 | 237篇 |
1991年 | 167篇 |
1990年 | 170篇 |
1989年 | 151篇 |
1988年 | 142篇 |
1987年 | 109篇 |
1986年 | 131篇 |
1985年 | 150篇 |
1984年 | 130篇 |
1983年 | 95篇 |
1982年 | 124篇 |
1981年 | 99篇 |
1980年 | 76篇 |
1979年 | 50篇 |
1978年 | 43篇 |
1977年 | 35篇 |
1976年 | 32篇 |
1975年 | 14篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
作者对15例贲门癌患者行根治术同时,采用食管残胃间插入带蒂空肠并附加贲门再造术,通过SPECT胃食管返流指数测定、食管下端pH检测及返流症状评定方法,并与单纯食管胃套叠吻合术进行随机对比分析,证明该术式具有单向住屏障作用,能有效地预防返流性食管炎的发生。 相似文献
92.
Preexpanded distant "super-thin" intercostal perforator flaps for facial reconstruction without the need for microsurgery. 总被引:1,自引:0,他引:1
F Lu J H Gao R Ogawa H Hykusoku 《Journal of plastic, reconstructive & aesthetic surgery》2006,59(11):1203-1208
BACKGROUND: Concept of the 'super-thin perforator flap' was introduced in 1994 by authors. Since then, various types of 'super-thin perforator flaps' were applied successfully especially for contour sensitive reconstruction such as face and neck. METHODS: Eleven patients requiring large flaps who presented with extensive disfiguring facial scar (male: seven cases, female: four cases). On the consideration of flaps' colour, texture and thickness requirements, the authors selected 'super-thin' anterior intercostal perforator flaps (AICP, range from 4 x 14 cm to 25 cm x 9 cm) for reconstruction purpose. First, tissue expanders (volume range from 800 cc to 1200 cc) were carefully inserted under the AICP. After the flaps were expanded for 2 months, distant scars were removed and the covering super-thinned flaps were transferred into recipient site. Two weeks later, pedicles in the anterior chest were cut down and flaps were transferred to replace all the left scars. RESULTS: Flap were survived without any complications. The colour, texture and thickness of the transferred flap were satisfactory, shrink of flaps were not observed after long term follow-up. The authors present a method of facial reconstruction that has the advantages of creating a large amount of thin tissue of both good colour and texture, without the need of microsurgery and few disadvantages of donor-site morbidity. The disadvantages are three-staged procedures, complications of tissue expansion and uncomfortable compulsory posture for patients. In our opinion, this is an alternative method of choice for reconstructing all large defects in the lower two-thirds of the face. 相似文献
93.
Reconstruction of pectus excavatum with silicone implants. 总被引:1,自引:0,他引:1
Alexander Margulis Mordechai Sela Rami Neuman Anat Buller-Sharon 《Journal of plastic, reconstructive & aesthetic surgery》2006,59(10):1082-1086
The pectus excavatum deformity is characterised by a deep depression usually involving the lower one-half to two-thirds of the sternum. The indications for surgery are often aesthetic. Extensive procedures, requiring fracturing and remodelling of the chest wall skeleton are associated with high morbidity and high rate of complications. In this article we describe our renewed experience with reconstruction of mild and moderate pectus excavatum deformities with custom made prefabricated silicone implants. The fabrication of the implant and the surgical technique are described in detail. An excellent aesthetic correction of the deformity was achieved in all of the patients in our series, with high patient satisfaction rate. We conclude that with careful patient selection, artistic implant fabrication and meticulous surgical technique, this approach achieves excellent aesthetic correction with minimal morbidity and a low complication rate and therefore should maintain its place in the armamentarium of surgical techniques for reconstruction of pectus deformities. 相似文献
94.
A. Ferretti E. Monaco L. Labianca F. D’Angelo A. De Carli F. Conteduca 《Journal of orthopaedics and traumatology》2006,7(3):136-141
Healing of a tendon graft to a bone tunnel is slower than the healing of a bone plug. Therefore, the device chosen for hamstring
fixation may need to maintain its strength and stiffness longer than the device chosen for bone-tendon-bone fixation. We evaluated,
in an extraarticular ovine model, how 4 and 12 weeks of implantation affect the strength of a tendon graft fixed to bone with
the Evolgate. The long digital extensor tendon was transplanted and fixed with the Evolgate into a 30-mm long, 8 mm diameter
bone tunnel drilled in the tibial metaphysis of both posterior limbs of 15 skeletally mature Suffolk sheep. Immediately after
implantation, and 4 and 12 weeks later, biomechanical cyclic load tests in 50 N increments were performed until failure to
evaluate the ultimate failure load (UFL). Histological analysis was also performed at 4 and 12 weeks. Biomechanical tests
revealed a UFL of 339±120 N at time 0, and increases to 635±19 N (4 weeks) and to 867±80 N (12 weeks). The differences between
all 3 groups were significant (p<0.001, paired t test). The histological evaluation showed a layer of cellular, fibrous tissue between the tendon and the bone, along the
length of the bone tunnel; this layer progressively matured and reorganized during the healing process. The collagen fibers
that attached the tendon to the bone resembled Sharpey’s fibers. The strength of the interface significantly and progressively
increased between weeks 4 and 12 after transplantation, and was associated with a degree of bone ingrowth noted histologically.
The use of the Evolgate seems not to interfere with the bone ingrowth after implantation, allowing an improvement in strength
of the bonetendon- device complex. 相似文献
95.
尿路感染是临床常见病和多发病,同时也是最常见的医院获得性感染.尿路感染的临床表现多样,症状不典型,白细胞尿和菌尿的检出是其筛检和确诊的重要指标.本文结合尿路感染的发病机制、诊断标准,对尿中白细胞和细菌检验项目和技术的临床意义及应用评价做了简要概述. 相似文献
96.
Luong Dong Cao Ishiwada Naruhiko Takeda Nobue Kohno Yoichi 《Pediatrics international》2004,46(4):419-424
BACKGROUND: Haemophilus influenzae (H. influenzae) is the most frequent bacterial pathogen of respiratory tract infections in children. Detection of antimicrobial susceptibility of H. influenzae is necessary for institution of appropriate antibiotic treatments. METHODS: A total of 281 strains of H. influenzae isolated from sputum samples of 281 pediatric patients with respiratory tract infections were recruited for study. Antibiotic susceptibility was determined by assessing minimum inhibitory concentrations (MIC) of antimicrobial agents. MIC were measured by utility of Agar dilution susceptibility test. RESULTS: Of the total, 38 (13.5%) strains produced beta-lactamase (BLP), 56 (19.9%) strains were beta-lactamase non-producing, ampicillin resistant (BLNAR). The overall resistant proportion to ampicillin was 33.4%. The data indicated that sulbactam/ampicillin, cefotaxime, ceftriaxone and cefditoren are effective against BLP strains. In addition, a high prevalence of BLNAR H. influenzae strains was identified, with an overall isolation rate of 19.9%. Those strains mainly demonstrated intermediate level to ampicillin (ampicillin-MIC = 3.13 micro g/mL for most of BLNAR strains). However, antimicrobial activities of cefotaxime, ceftriaxone and cefditoren against those strains were slightly diminished. Recovery rate of BLP strains was varied by years, peaking at 19.5%. In particular, a trend of yearly increase in frequency of BLNAR strains was observed. CONCLUSION: Frequency of BLNAR strains causing respiratory infections has been dramatically increasing, which can diminish antibiotic activities of not only ampicillin but also of some cephems. 相似文献
97.
目的 探讨计算机体层成像多平面重建(CTMPR)在评价椎间融合中的作用,寻找定量评价椎间融合的新方法.方法 13例行腰椎间融合的患者术后1周、3个月、6个月行CTMPR,行椎间融合器(Cage)内植骨CT值定量测量.结果 术后1周Cage内植骨CT值为(619.52±26.97)Hu,术后3个月为(628.69±42.60)Hu,术后6个月为(657.77±37.43)Hu.术后1周与术后3个月相比无显著性差异,与术后6个月相比有显著性差异.结论 CT值的测量在椎间融合的判断中具有高准确性. 相似文献
98.
99.
A. Barutçu 《European journal of plastic surgery》1994,17(6):316-318
Summary Pedicled temporoparietal fascial flaps have been used extensively in head and neck reconstruction for many years. Also, the fascia has been grafted, and the skin graft transformed into a vascularized pedicled flap (prefabricated temporoparietal fasciocutaneous flap). On the other hand, some authors have used free temporoparietal fascial flaps for defects that require to be filled in lower and upper extremity wounds. In this case, a free prefabricated temporoparietal fascio-chondro-cutaneous flap having only an arterial inflow was used in eyelid reconstruction.Presented at the 14th Congress of Turkish Plastic and Reconstructive Surgery, Ankara, Turkey, October 1992 相似文献
100.
小儿重复肾合并其他尿路畸形(附60例报告) 总被引:5,自引:0,他引:5
60例重复肾中,48例合并输尿管口异位,7例合并输尿管囊肿,4例伴巨大输尿管积水,5例合并肾发育不良,1例为肾积水。年龄4个月~13岁。临床表现:滴沥性尿失禁48例,尿路感染10例,腹部包块6例,排尿困难5例,尿道口有肿物脱出4例。诊断主要依靠IVU。58例经手术治疗,其中51例作患侧上肾部及输尿管切除,7例行患侧肾切除。术后除1例尿内仍有异常外,均恢复满意。 相似文献