全文获取类型
收费全文 | 29486篇 |
免费 | 1850篇 |
国内免费 | 390篇 |
专业分类
耳鼻咽喉 | 619篇 |
儿科学 | 486篇 |
妇产科学 | 432篇 |
基础医学 | 4621篇 |
口腔科学 | 593篇 |
临床医学 | 2309篇 |
内科学 | 5834篇 |
皮肤病学 | 895篇 |
神经病学 | 2121篇 |
特种医学 | 1969篇 |
外科学 | 4320篇 |
综合类 | 90篇 |
现状与发展 | 1篇 |
一般理论 | 4篇 |
预防医学 | 962篇 |
眼科学 | 918篇 |
药学 | 2788篇 |
中国医学 | 415篇 |
肿瘤学 | 2349篇 |
出版年
2023年 | 160篇 |
2022年 | 129篇 |
2021年 | 984篇 |
2020年 | 589篇 |
2019年 | 813篇 |
2018年 | 954篇 |
2017年 | 774篇 |
2016年 | 1178篇 |
2015年 | 1531篇 |
2014年 | 1784篇 |
2013年 | 2016篇 |
2012年 | 2929篇 |
2011年 | 2719篇 |
2010年 | 1781篇 |
2009年 | 1447篇 |
2008年 | 1919篇 |
2007年 | 1819篇 |
2006年 | 1543篇 |
2005年 | 1363篇 |
2004年 | 1102篇 |
2003年 | 909篇 |
2002年 | 836篇 |
2001年 | 377篇 |
2000年 | 344篇 |
1999年 | 259篇 |
1998年 | 102篇 |
1997年 | 83篇 |
1996年 | 64篇 |
1995年 | 73篇 |
1994年 | 54篇 |
1993年 | 43篇 |
1992年 | 93篇 |
1991年 | 85篇 |
1990年 | 95篇 |
1989年 | 88篇 |
1988年 | 75篇 |
1987年 | 65篇 |
1986年 | 58篇 |
1985年 | 59篇 |
1984年 | 33篇 |
1983年 | 40篇 |
1982年 | 21篇 |
1981年 | 29篇 |
1979年 | 39篇 |
1978年 | 44篇 |
1977年 | 27篇 |
1976年 | 20篇 |
1975年 | 30篇 |
1974年 | 27篇 |
1973年 | 21篇 |
排序方式: 共有10000条查询结果,搜索用时 30 毫秒
1.
Esophagus - Pulmonary complications are common after esophageal cancer surgery, but information regarding fatal respiratory events, such as postoperative acute respiratory distress syndrome (ARDS)... 相似文献
2.
Rationale:Tarlov or perineurial cysts are nerve root lesions often found in the sacral region. Most perineural cysts (PCs) remain asymptomatic throughout a patient''s life. While their pathogenesis is still unclear, trauma resulting in hemorrhaging into subarachnoid space has been put forward as a possible cause of these cysts. Recently, we worked with a patient experiencing symptomatic PCs after spontaneous subarachnoid hemorrhage.Patient concerns:A 45-year-old man had a coil embolization procedure performed after being diagnosed with a subarachnoid hemorrhage from a ruptured anterior communicating artery. His symptoms were relieved after the procedure, but 7 days later he reported worsening pain in the left perineal area. The pain was intermittent at its onset and exacerbated by sitting, walking, and coughing.Diagnoses:Two weeks after the embolization procedure, a lumbar spine MRI revealed 2 PCs at the S1 and S2 level affecting the left S2 root with high signal intensity in T2 and T1 images, suggestive of bleeding within the cyst.Interventions:We operated using a posterior approach. Cyst fenestration was done after S1 laminectomy. We aspirated approximately 1 cc of old blood.Outcomes:His pain was relieved immediately after cyst removal and no neurologic deterioration occurred during the postoperative period.Lessons:Subarachnoid hemorrhage can be the source of the development of pain from asymptomatic PCs, making them symptomatic. Surgical extirpation is 1 treatment option for these symptomatic PCs. 相似文献
3.
Yeon Seok Lee June Hyunkyung Lee Jae Eun Choi Joo Young Kim Tae Young Han 《Pediatric dermatology》2021,38(1):290-291
Erythema induratum of Bazin (EIB) is a form of tuberculid resulting from hypersensitivity to tuberculosis antigen. EIB occurs most commonly in middle‐aged women and is not typically seen in children. Here, we present a rare case of EIB, presenting as a chronic nodular panniculitis, in a 10‐year‐old Korean boy. 相似文献
4.
Hyun Cheol Chung MD PhD Yoon-Koo Kang MD PhD Zhendong Chen MD Yuxian Bai MD Wan Zamaniah Wan Ishak MD Byoung Yong Shim MD Young Lee Park MD Dong-Hoe Koo MD PhD Jianwei Lu MD Jianming Xu MD Hong Jae Chon MD Li-Yuan Bai MD Shan Zeng MD Ying Yuan MD Yen-Yang Chen MD Kangsheng Gu MD Wen Yan Zhong PhD Shu Kuang MD Chie-Schin Shih MD Shu-Kui Qin MD PhD 《Cancer》2022,128(5):995-1003
5.
6.
7.
Ye Young Shin Yoojin Seo Su-Jeong Oh Ji-Su Ahn Min-hye Song Min-Jung Kang Jung-Min Oh Dongjun Lee Yun Hak Kim Eui-Suk Sung Hyung-Sik Kim 《Journal of pineal research》2022,72(1):e12779
The prevalence of head and neck squamous cell carcinoma (HNSCC) has continued to rise for decades. However, drug resistance to chemotherapeutics and relapse, mediated by cancer stem cells (CSCs), remains a significant impediment in clinical oncology to achieve successful treatment. Therefore, we focused on analyzing CSCs in HNSCC and demonstrated the effect of melatonin (Mel) and verteporfin (VP) on SCC-25 cells. HNSCC CSCs were enriched in the reactive oxygen species-low state and in sphere-forming cultures. Combination treatment with Mel and VP decreased HNSCC viability and increased apoptosis without causing significant damage to normal cells. Sphere-forming ability and stem cell population were reduced by co-treatment with Mel and VP, while mitochondrial ROS level was increased by the treatment. Furthermore, the expression of mitophagy markers, parkin and PINK1, was significantly decreased in the co-treated cells. Mel and VP induced mitochondrial depolarization and inhibited mitochondrial function. Parkin/TOM20 was localized near the nucleus and formed clusters of mitochondria in the cells after treatment. Moreover, Mel and VP downregulated the expression of markers involved in epithelial-mesenchymal transition and metastasis. The migration capacity of cells was significantly decreased by co-treatment with Mel and VP, accompanied by the down-regulation of MMP-2 and MMP-9 expression. Taken together, these results indicate that co-treatment with Mel and VP induces mitochondrial dysfunction, resulting in the apoptosis of CSCs. Mel and VP could thus be further investigated as potential therapies for HNSCC through their action on CSCs. 相似文献
8.
Background
Many patients undergoing below knee amputations (BKA) return for subsequent unplanned operations, hospital readmission, or postoperative complications. This unplanned medical management negatively impacts both patient outcomes and our healthcare system. This study primarily investigates the risk factors for unplanned reoperation following BKA.Methods
Below knee amputations from the American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) database from the years 2012–2014 were identified by CPT code 27880 for amputation through the tibia and fibula. Our query identified 4631 BKA cases, including 30 day complications. Multivariate logistic regression modeling was performed on several patient demographic and disease factors to assess for independent predictors of unplanned reoperation. Secondary outcomes of unplanned and related readmissions (related to the procedure), major complications, minor complications, and mortality were also included in the analysis.Results
Of 4631 BKAs identified, 9.63% (446/4631) underwent unplanned reoperations and 8.75% (405/4631) had unplanned and related readmissions. Major complications were experienced by 12.8% (593/4631) and minor complications by 8.7% (401/4631). Thirty day mortality rate was 5.14% (238/4631). The most common procedures for unplanned operations were thigh amputations (128/446, 28.7%), debridement/secondary closure (114/446, 25.6%), and revision leg amputations (46/446, 10.32%). Factors associated with an increased risk of unplanned reoperation included patients transferred from another facility (Adjusted Odds Ratio [AOR]?=?1.28; p?=?.04), recent smokers (AOR?=?1.34; p?=?.02), bleeding disorder (AOR?=?1.30; p?=?.02), and preoperative ventilator use (AOR?=?2.38; p?=?.01).Conclusion
Patients that were ongoing/recent smokers, had diagnosed bleeding disorders, required preoperative ventilator use, or were transferred in from another facility were associated with the highest risks of reoperation following BKA. This patient population experiences high rates of reoperation, readmission, complication, and mortality. 相似文献9.
Jae Hwang Song Chan Kang Deuk Soo Hwang Dong Hun Kang Yong Hwan Kim 《Foot and Ankle Surgery》2019,25(6):748-754
BackgroundThe purpose of this study was to investigate and compare the clinical outcomes of dorsal suspension with those of neurectomy for the treatment of Morton’s neuroma.MethodsWe conducted a retrospective study of dorsal suspension and neurectomy group. The dorsal suspension was performed by dorsal transposition of neuroma over the dorsal transverse ligament after neurolysis. The visual analog scale (VAS), the Foot and Ankle Ability Measure (FAAM), postoperative satisfaction, and complications were evaluated.ResultsBoth groups reported significant pain relief, and there were no significant differences between the groups with respect to postoperative pain. The postoperative FAAM outcomes showed no significant between-group differences. Satisfaction analysis showed ‘excellent’ and ‘good’ results in the dorsal suspension and neurectomy groups (95% and 77.7%, respectively). Complications of numbness and paresthesia reported in the dorsal suspension group (5% and 5%, respectively) were significantly fewer than those of neurectomy group (61.1% and 33.3%, respectively) (both, p < .05).ConclusionsWith its favorable results, dorsal suspension can be another operative option for the treatment of Morton’s neuroma.Level of Evidence: Level III, retrospective comparative case series. 相似文献
10.
Jae Eun Choi Tyler Werbel Zhenping Wang Chia Chi Wu Tony L. Yaksh Anna Di Nardo 《Journal of dermatological science》2019,93(1):58-64