全文获取类型
收费全文 | 387262篇 |
免费 | 27672篇 |
国内免费 | 10990篇 |
专业分类
耳鼻咽喉 | 4127篇 |
儿科学 | 11029篇 |
妇产科学 | 6679篇 |
基础医学 | 31140篇 |
口腔科学 | 8001篇 |
临床医学 | 41741篇 |
内科学 | 58420篇 |
皮肤病学 | 4711篇 |
神经病学 | 19892篇 |
特种医学 | 10192篇 |
外国民族医学 | 46篇 |
外科学 | 42921篇 |
综合类 | 59786篇 |
现状与发展 | 31篇 |
一般理论 | 29篇 |
预防医学 | 36181篇 |
眼科学 | 5310篇 |
药学 | 35114篇 |
401篇 | |
中国医学 | 33672篇 |
肿瘤学 | 16501篇 |
出版年
2023年 | 6251篇 |
2022年 | 10710篇 |
2021年 | 15247篇 |
2020年 | 14365篇 |
2019年 | 19919篇 |
2018年 | 17595篇 |
2017年 | 14756篇 |
2016年 | 12709篇 |
2015年 | 11775篇 |
2014年 | 23026篇 |
2013年 | 24565篇 |
2012年 | 20973篇 |
2011年 | 22866篇 |
2010年 | 18210篇 |
2009年 | 16865篇 |
2008年 | 16470篇 |
2007年 | 16983篇 |
2006年 | 15114篇 |
2005年 | 12994篇 |
2004年 | 10525篇 |
2003年 | 9276篇 |
2002年 | 7392篇 |
2001年 | 6697篇 |
2000年 | 5528篇 |
1999年 | 4770篇 |
1998年 | 4011篇 |
1997年 | 3741篇 |
1996年 | 3283篇 |
1995年 | 3083篇 |
1994年 | 2962篇 |
1993年 | 2383篇 |
1992年 | 2384篇 |
1991年 | 2028篇 |
1990年 | 1822篇 |
1989年 | 1608篇 |
1988年 | 1519篇 |
1987年 | 1293篇 |
1985年 | 3945篇 |
1984年 | 4946篇 |
1983年 | 3438篇 |
1982年 | 3915篇 |
1981年 | 3636篇 |
1980年 | 3236篇 |
1979年 | 2980篇 |
1978年 | 2600篇 |
1977年 | 1959篇 |
1976年 | 2211篇 |
1975年 | 1657篇 |
1974年 | 1456篇 |
1973年 | 1295篇 |
排序方式: 共有10000条查询结果,搜索用时 265 毫秒
991.
目的:探讨乳腺癌改良根治术后自帖式敷料包扎刀口的临床效果。方法:将70例乳腺癌改良根治术患者随机分为两组,对创面不同包扎方式进行对比。结果:自帖式敷帖对术后创面包扎并发症少于传统绷带加压包扎方式。结论:自帖式敷帖包扎乳腺癌改良根治术后创面,能预防切口并发症的发生。 相似文献
992.
目的分析影响肝癌肝移植术后生存率和无瘤生存率的危险因素,探讨国内肝移植治疗肝癌的选择标准。方法对67例接受同种异位原位肝移植治疗的原发性肝癌病人的基本资料和肿瘤相关资料包括术前病情分级、血清AFP水平、术前辅助治疗以及肝癌大小、数目、pTNM分期、肿瘤恶性程度分级等因素进行单因素和多因素分析。结果术后1年、2年累积生存率为77%、67%,6个月和12个月无瘤生存率为66%和58%。单因素分析显示对肝癌肝移植术后累积生存率影响有统计学意义的因素为CHILD分级(MELD积分)和肝外大血管侵犯;多因素分析影响肝癌肝移植术后无瘤生存率有统计学义的因素是肿瘤大小、大血管侵犯和肿瘤分化程度。结论影响肝癌肝移植术后生存率的因素仍是术前患者肝功能状态。对存在大血管侵犯的肝癌患者需严格控制肝移植术适应证,而无血管侵犯的患者在选择肝移植治疗时肿瘤大小指标可较米兰标准适当放宽。 相似文献
993.
994.
Prasanna Kumar Reddy R Venkata Subramanian S Yuvaraja 《JSLS, Journal of the Society of Laparoendoscopic Surgeons》2005,9(3):356-357
Transposition of the gallbladder to the left side without situs inversus viscerum is rare. These gallbladders are situated under the left lobe of the liver between Segment III and IV or on Segment III to the left of the falciform ligament. Because routine preoperative studies may not detect the anomaly, it may provide the surgeons with an unusual surprise during laparoscopy. Awareness of the unpredictable confluence of the cystic duct into the common bile duct and selective use of intraoperative cholangiography aid in the safe laparoscopic management of this unusual problem. 相似文献
995.
目的 针对微笑时鼻唇部出现上唇上提并短缩,鼻小柱下方褶沟,上唇牙龈外露等现象,探讨一种治疗上唇短缩畸形的手术方法.方法 采用经口或鼻前庭切口,将鼻小柱根部鼻中隔降肌肌纤维切断及部分切除,并广泛剥离使上唇下降.结果 共为27例上唇短缩畸形患者进行手术治疗.其中9例采用了双侧鼻小柱外侧与前庭基底贯穿切口,18例采用了上唇唇龈沟切口.通过手术,患者获得微笑时上唇中部适度降低,鼻小柱下方褶沟变浅或消失,上唇牙龈外露消失的效果.6例患者还在手术矫正上唇动态短缩畸形的同时,实施了鼻整形术.通过手术可矫正鼻唇牙龈部的综合动态缺陷,获得满意的美学效果.结论 手术方法治疗上唇短缩畸形,可改善患者微笑时的表情,是值得推广的治疗方法. 相似文献
996.
目的总结骨盆骨折并单纯性腹腔内出血误诊经验教训及急救处理。方法对8例骨盆骨折并单纯性腹腔内出血的伤因、诊断、急救方法选择进行回顾性分析。结果骨盆骨折并单纯性腹腔内出血与伤因及搬运不当致骨折移位、再移位密切相关;与骨折部位也关系密切;骨盆骨折并单纯性腹腔内出血常易误诊为腹腔内脏合并伤而行剖腹探查术时确诊,腹膜后血肿探查止血,术中、术后死亡率高。结论骨箍骨折并单纯性腹腔内出血易误诊为腹内脏器伤,救治困难,死亡率高。 相似文献
997.
G Titeca†§ F Poot†§ D Cassart‡ B Defays† D Pirard†§ M Comas† P Vereecken†¶†† V Verschaevec P Simon† M Heenen† 《Journal of the European Academy of Dermatology and Venereology》2007,21(6):771-776
BACKGROUND: Breast cancer is the most common cancer in women and therefore represents a major problem in public health. Data from patients' self-report questionnaires provide valuable information about the side-effects that patients may view as having a significantly detrimental impact on their quality of life (QOL) and yet are not always recognized as important by healthcare professionals. Cosmetology is a specific care for patients and there is actually no scientific evidence regarding effects on QOL for women with breast cancer. OBJECTIVE: The purpose of this study is to assess the impact of cosmetic care on QOL in breast cancer patients during chemotherapy and radiotherapy. METHODS: We developed a prospective, multicentre, randomized, controlled study including 27 patients. All the patients had to fill in a French-validated dermatologic specific quality-of-life questionnaire to compare the QOL of the two groups, the cosmetic group and the control group, at three different times of the adjuvant treatment. RESULTS: The results show a statistically significant difference between the cosmetic group and the control group in two areas of QOL: mood state and self-perception of the disease. CONCLUSION: This study emphasizes the interest of cosmetic care in breast cancer patients. However, further larger trials are needed to confirm this study. 相似文献
998.
肢体抖动短暂性脑缺血发作(LS-TIA)的临床及影像 总被引:1,自引:1,他引:0
目的 肢体抖动短暂性脑缺血发作(LS-TIA)临床少见,本文旨在提高临床医师对这一症候的认识.方法 总结北京协和医院诊断为肢体抖动短暂性脑缺血发作患者7例,行颈部血管超声、脑电图、头部核磁共振、经颅多普勒超声、核磁血管成像,4例行数字减影血管造影,2例行CT灌注成像检查.结果 均表现为发作性短暂不能控制的抖动,5例发作有明显诱因.全部患者均有抖动肢体对侧至少1条以上颅内和/或颅外动脉重度狭窄或闭塞.头部核磁共振4例显示抖动肢体对侧内分水岭脑梗死.脑电图均未见痫样放电,6例可见病变血管同侧额颞部慢波灶.经扩容和抗血小板聚集或者血管内支架治疗后,所有患者病情稳定.结论 肢体抖动短暂性脑缺血发作通常提示大血管严重的狭窄或闭塞,低灌注是其最可能的发病机制. 相似文献
999.
腹腔镜辅助下大隐静脉隔绝术治疗大隐静脉曲张60例 总被引:1,自引:0,他引:1
目的探讨腹腔镜辅助下大隐静脉隔绝术的疗效。方法2000年1月~2004年1月对60例66条大隐静脉曲张腹腔镜辅助下行大隐静脉隔绝术,腹腔镜辅助下高位结扎、电灼大腿段大隐静脉,阻断其小腿段所有属支及交通支,使大隐静脉与体循环隔绝。结果手术时间30~60min,(50±9)min;术后住院时间3~5d,(3.5±0.6)d。60例随访1~36个月,平均28个月,无复发。结论腹腔镜辅助下大隐静脉隔绝术创伤小,疗效好,复发率低,是治疗大隐静脉曲张的理想术式。 相似文献
1000.
Successful Liver and Kidney Transplantation From Cadaveric Donors With Left-Sided Bacterial Endocarditis 总被引:1,自引:0,他引:1
Francisco Caballero Antonio Lopez-Navidad Milagrosa Perea Catiana Cabrer Lluis Guirado Ricard Solà 《American journal of transplantation》2005,5(4):781-787
Bacterial infections are frequent in cadaveric organ donors and can be transmitted to the transplantation recipient, which could have devastating consequences for the recipients if adequate preventive measures are not adopted.
From the 355 consecutive brain dead cadaveric organ donors procured at our center in the last four years, 2000–2003, four of them (1.1%) had bacterial endocarditis as cause of death. The bacteria responsible for the endocarditis were Staphylococcus epidermidis, coagulase-negative Staphylococcus , Staphylococcus hominis and Streptococcus viridans , respectively. We performed five kidney and two liver transplantations on seven recipients. All donors and recipients received antibiotic treatment against the germ causing the respective endocarditis.
Infection by the bacteria responsible for the endocarditis in the respective donors was not transmitted to any of the recipients. Six of the seven recipients were alive with normal-functioning grafts after between 13 and 24 months' follow-up. Transplantectomy was performed on one kidney recipient due to thrombosis of the renal vein of the graft not related to the endocarditis.
Liver and kidney transplantation from donors dying from bacterial endocarditis can be performed without causing the transmission of infection to the recipient or the dysfunction of the graft. 相似文献
From the 355 consecutive brain dead cadaveric organ donors procured at our center in the last four years, 2000–2003, four of them (1.1%) had bacterial endocarditis as cause of death. The bacteria responsible for the endocarditis were Staphylococcus epidermidis, coagulase-negative Staphylococcus , Staphylococcus hominis and Streptococcus viridans , respectively. We performed five kidney and two liver transplantations on seven recipients. All donors and recipients received antibiotic treatment against the germ causing the respective endocarditis.
Infection by the bacteria responsible for the endocarditis in the respective donors was not transmitted to any of the recipients. Six of the seven recipients were alive with normal-functioning grafts after between 13 and 24 months' follow-up. Transplantectomy was performed on one kidney recipient due to thrombosis of the renal vein of the graft not related to the endocarditis.
Liver and kidney transplantation from donors dying from bacterial endocarditis can be performed without causing the transmission of infection to the recipient or the dysfunction of the graft. 相似文献