全文获取类型
收费全文 | 495篇 |
免费 | 69篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 12篇 |
妇产科学 | 14篇 |
基础医学 | 48篇 |
口腔科学 | 22篇 |
临床医学 | 91篇 |
内科学 | 87篇 |
皮肤病学 | 16篇 |
神经病学 | 40篇 |
特种医学 | 16篇 |
外科学 | 79篇 |
综合类 | 6篇 |
预防医学 | 39篇 |
眼科学 | 7篇 |
药学 | 36篇 |
中国医学 | 12篇 |
肿瘤学 | 39篇 |
出版年
2023年 | 9篇 |
2022年 | 30篇 |
2021年 | 41篇 |
2020年 | 28篇 |
2019年 | 33篇 |
2018年 | 40篇 |
2017年 | 31篇 |
2016年 | 31篇 |
2015年 | 27篇 |
2014年 | 38篇 |
2013年 | 41篇 |
2012年 | 42篇 |
2011年 | 44篇 |
2010年 | 19篇 |
2009年 | 15篇 |
2008年 | 32篇 |
2007年 | 25篇 |
2006年 | 7篇 |
2005年 | 9篇 |
2004年 | 10篇 |
2003年 | 4篇 |
2001年 | 3篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1984年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有566条查询结果,搜索用时 171 毫秒
1.
2.
Sedigheh Sadat Tavafian Ahmadreza Jamshidi Kazem Mohammad Ali Montazeri 《BMC musculoskeletal disorders》2007,8(1):21
Background
Different interventions can reduce the burden of the chronic low back pain. One example is the use of a 'Back School Programme'. This is a brief therapy that uses a health education method to empower participants through a procedure of assessment, education and skill development. This study aimed to evaluate to what extent the programme could improve quality of life in those who suffer from the condition. 相似文献3.
Saeed Shoar Fatemeh Sadat Hosseini Azouba Gulraiz Waleed Ikram Moiz Javed Mohammad Naderan Nasrin Shoar Venkat R. Modukuru 《Surgery for obesity and related diseases》2021,17(3):630-643
Even in the hands of highly experienced bariatric surgeons, perioperative complications are inevitable. Of these, leaks and fistulas are amongst the scariest complications. Intrathoracic gastric fistulas (ITGF) can be associated with serious morbidity, mostly when cases are misdiagnosed or detected with delay. This is a systematic review of the literature to investigate the clinical and surgical outcomes of morbidly obese adult patients with a confirmed diagnosis of ITGF following bariatric surgery. A pooled analysis of 25 articles, encompassing 76 patients with post-bariatric ITGF, showed that the clinical outcome depends on the initial presentation, timing of the diagnosis in relation to symptom onset, and prompt and effective treatment. Any septic or unstable patient must undergo urgent surgical intervention, while stable patients might tolerate a step-up approach and watchful waiting for nonsurgical treatment. Among those who undergo surgery, treatment failure and the mortality rate are substantially high. Contingent upon a prompt management strategy, patients with postbariatric ITGF can generally have a favorable outcome in the long term. 相似文献
4.
L R Lipton V Johnson C Cummings S Fisher P Risby A T Eftekhar Sadat T Cranston L Izatt P Sasieni S V Hodgson H J W Thomas I P M Tomlinson 《Journal of clinical oncology》2004,22(24):4934-4943
PURPOSE: Hereditary nonpolyposis colon cancer (HNPCC) is a Mendelian dominant syndrome of bowel, endometrial, and other cancers and results from germline mutations in mismatch repair (MMR) genes. HNPCC is now best diagnosed on molecular grounds using MMR mutation screening, aided by microsatellite instability (MSI) and immunohistochemistry in tumors. Selection of families for molecular investigation of HNPCC is usually based on suboptimal methods (Amsterdam Criteria or Bethesda Guidelines), but these can be improved using additional clinical data (mean ages of affected persons and presence of endometrial cancer) in a quantitative model. METHODS: We have verified the performance of the Wijnen model and have shown that it remains valid when HNPCC is diagnosed using mutation screening, MSI, and immunohistochemistry. We have also set up and verified our own models (Amsterdam-plus and Alternative), which perform at least as well as the Wijnen model. RESULTS: The Amsterdam-plus model improves on the Amsterdam Criteria by using five extra variables (numbers of colorectal and endometrial cancers in the family, number of patients with five or more adenomas, number with more than one primary cancer of the colorectum or endometrium, and mean age of presentation) and performs better than the Wijnen model. The Alternative model avoids the need to evaluate the Amsterdam Criteria and performs nearly as well as the other models. CONCLUSION: We believe that a quantitative model, such as the Amsterdam-plus model, should be the first choice for selecting families or patients for evaluation of HNPCC using molecular tests. We present an algorithm for this process. 相似文献
5.
Kamel Sadat M.D. Hari Prakash Diddi M.B.B.S. Berthold Klas B.S. Ayman Haj Asaad M.D. Elif İjlal Çekirdekçi M.D. Aylin Sungur M.D. Selvin Sudhakar M.D. Matthew Cain M.D. Arshad Kamal M.D. Navin C. Nanda M.D. 《Echocardiography (Mount Kisco, N.Y.)》2013,30(10):1227-1231
Hypertrophic cardiomyopathy (HCM) is the most common genetically transmitted cardiomyopathy. In patients resistant to medical management, myectomy is the surgical procedure of choice to reduce the symptoms of left ventricular outflow obstruction. Two‐dimensional transesophageal echocardiography (2DTEE) has become part of the operative procedure by decreasing the incidence of postoperative complications. However, because of the three‐dimensional geometry of left ventricular outflow tract, it is unable to comprehensively assess the location and severity of the obstruction and to provide accurate guidance during myectomy. In this study, 10 patients with HCM underwent live/real time three‐dimensional transesophageal echocardiography (3DTEE) intra‐operatively to measure the volume of the resected septum. This volume correlated well with the volume of the resected septal muscle directly obtained using a graduating cylinder containing water (r = 0.9, P < 0.000). 3DTEE may be potentially used as an adjunct to guide the surgeon in performing an adequate myectomy with a lower incidence of residual obstruction and complications such as an iatrogenic ventricular septal defect. 相似文献
6.
7.
Mohammad Hossein Baradaranfar Zeynab Sadat Ahmadi Mohammad Hossein Dadgarnia Mohammad Hossein Bemanian Saeid Atighechi Ghasem Karimi Abolhasan Halvani Nasim Behniafard Amin Baradaranfar Tohid Emami Meybodi 《European archives of oto-rhino-laryngology》2014,271(2):311-316
Chronic rhinosinusitis is a common inflammatory condition in western countries. Nasal polyposis has different symptoms such as nasal obstruction, anterior or posterior nasal drip, reduced sense of smell, and facial pain. Medical and endoscopic treatments are the two main treatments for nasal polyposis. Our aim was to compare the efficacy of different methods on olfactory function. This is a non-randomized clinical trial study that was done on 60 patients who were divided into two groups (medical and surgical). Patients were matched based on age, history of smoking, and the severity of obstruction. The radiologist score of Lund-Mackay staging system was used to match patients in two arms of the trial based on the severity of nasal obstruction. Patients in surgery groups underwent functional endoscopic sinus surgery under general anesthesia and then received Fluticasone propionate nasal spray for 8 weeks (400 mcg bd). Patients in the medical group were only prescribed with Fluticasone propionate with the same duration and same dose as mentioned. As a result of treatment protocol, both medical and surgical group experienced improvement in olfactory function but statistical analyses revealed that surgery resulted in better resolution of symptoms. Our observation revealed that combined treatment had a better effect than medical treatment in restoring olfaction in patients with nasal polyposis. 相似文献
8.
9.
Mohamed El‐khalawany Ali Mahmoud Al‐Sadat Mosbeh Fatma Abd Alsalam Noha Ghonaim Amany Abou‐bakr 《The Journal of dermatology》2012,39(12):989-995
Helicobacter pylori was incriminated as an etiological factor of rosacea. However, there is still controversy about this association. We conducted a comparative study in order to assess the role of H. pylori in rosacea patients who had dyspeptic symptoms. The study included 68 patients and 54 controls. Screening for H. pylori was performed and positive cases were referred for gastric endoscopy. The inflammatory response and bacterial density were evaluated in gastric biopsy. H. pylori vacA alleles, cagA and iceA genotypes were assessed by polymerase chain reaction. We found that 49 rosacea (72%) and 25 controls (46.3%) were infected with H. pylori. Thirty‐one rosacea cases were papulopustular (PPR) while 18 were erythematotelangiectatic (ETR). Gastric ulceration was higher in PPR cases (38.7%) than ETR (11.1%) and controls (12%). A significant inflammatory reaction was observed more in PPR cases (74.2%) compared with 44.4% in ETR (P = 0.04) and 44% in controls (P = 0.02). Analysis of H. pylori genotypes revealed that vacA s1m1 was more identified in PPR cases (54.8%) compared with 22.2% in ETR (P = 0.03) and 16% in controls (P = 0.003). There was a significant elevation of cagA/vacA s1m1 positivity in PPR cases. After the eradication regimen of H. pylori, a significant improvement (P < 0.05) was observed in 15 out of 27 PPR cases (55.6%) compared with three out of 17 ETR (17.6%). We concluded that H. pylori has a significant role in rosacea patients who had dyspeptic symptoms. The PPR type is more influenced by H. pylori and this is regarded as being because of certain virulent strains that increase the inflammatory response in gastric mucosa and also in cutaneous lesions. 相似文献