全文获取类型
收费全文 | 2197篇 |
免费 | 123篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 80篇 |
妇产科学 | 34篇 |
基础医学 | 215篇 |
口腔科学 | 55篇 |
临床医学 | 173篇 |
内科学 | 787篇 |
皮肤病学 | 18篇 |
神经病学 | 126篇 |
特种医学 | 61篇 |
外科学 | 205篇 |
综合类 | 51篇 |
一般理论 | 1篇 |
预防医学 | 89篇 |
眼科学 | 63篇 |
药学 | 196篇 |
中国医学 | 5篇 |
肿瘤学 | 129篇 |
出版年
2023年 | 23篇 |
2022年 | 10篇 |
2021年 | 99篇 |
2020年 | 62篇 |
2019年 | 118篇 |
2018年 | 109篇 |
2017年 | 63篇 |
2016年 | 86篇 |
2015年 | 63篇 |
2014年 | 94篇 |
2013年 | 93篇 |
2012年 | 149篇 |
2011年 | 153篇 |
2010年 | 80篇 |
2009年 | 75篇 |
2008年 | 130篇 |
2007年 | 110篇 |
2006年 | 103篇 |
2005年 | 81篇 |
2004年 | 83篇 |
2003年 | 58篇 |
2002年 | 41篇 |
2001年 | 39篇 |
2000年 | 31篇 |
1999年 | 21篇 |
1998年 | 18篇 |
1997年 | 9篇 |
1996年 | 7篇 |
1995年 | 8篇 |
1994年 | 11篇 |
1993年 | 7篇 |
1992年 | 23篇 |
1991年 | 23篇 |
1990年 | 22篇 |
1989年 | 23篇 |
1988年 | 20篇 |
1987年 | 12篇 |
1986年 | 11篇 |
1985年 | 11篇 |
1984年 | 13篇 |
1983年 | 14篇 |
1981年 | 14篇 |
1979年 | 13篇 |
1978年 | 6篇 |
1975年 | 6篇 |
1974年 | 8篇 |
1973年 | 11篇 |
1972年 | 7篇 |
1969年 | 10篇 |
1966年 | 8篇 |
排序方式: 共有2324条查询结果,搜索用时 15 毫秒
61.
Emergency Radiology - Mastoid air cell fluid is a commonly seen, but often dismissed finding. Given the location of the mastoid portion of the temporal bone and its location adjacent to vital... 相似文献
62.
Fadi Seif Sanjay R. Patel Harneet Walia Michael Rueschman Deepak L. Bhatt Daniel J. Gottlieb Eldrin F. Lewis Susheel P. Patil Naresh M. Punjabi Denise C. Babineau Susan Redline Reena Mehra 《Journal of sleep research》2013,22(4):443-451
The objective of this study is to examine whether increasing obstructive sleep apnea (OSA) severity is associated with worsening endothelial function. The design is a cross‐sectional examination of the baseline assessment of a multi‐centre randomized controlled clinical trial examining the effects of oxygen, continuous positive airway pressure (CPAP) therapy or lifestyle modifications on cardiovascular biomarkers. Participants were recruited from cardiology clinics at four sites. Participants with an apnea–hypopnea index (AHI) of 15–50 and known cardio/cerebrovascular disease (CVD) or CVD risk factors were included. OSA severity indices [oxygen desaturation index (ODI), AHI and percentage of sleep time below 90% oxygen saturation (total sleep time <90)] and a measure of endothelium‐mediated vasodilatation [Framingham reactive hyperaemia index (F‐RHI) derived from peripheral arterial tonometry (PAT)] were assessed. The sample included 267 individuals with a mean AHI of 25.0 ± 8.5 SD and mean F‐RHI 0.44 ± 0.38. In adjusted models, the slope of the relationship between ODI and F‐RHI differed above and below an ODI of 24.6 (P = 0.04), such that above an ODI of 24.6 there was a marginally significant decline in the geometric mean of the PAT ratio by 3% [95% confidence interval (CI): 0%, 5%; P = 0.05], while below this point, there was a marginally significant incline in the geometric mean of the PAT ratio by 13% (95% CI: 0%, 27%; P = 0.05) per 5‐unit increase in ODI. A similar pattern was observed between AHI and F‐RHI. No relation was noted with total sleep time <90 and F‐RHI. There was evidence of a graded decline in endothelial function in association with higher levels of intermittent hypoxaemia. 相似文献
63.
64.
Prem Kumar Rathod Rahul Yadav Ongkila Bhutia Ajoy Roychoudhury Krushna Bhatt Kamalpreet Kaur 《Journal of oral and maxillofacial surgery》2021,79(6):1328.e1-1328.e13
65.
Prashant Pandey Divya Setya Amit K. Devra Vijay Kumar Sinha Anil Prasad Bhatt Amit Pande Praveen Kumar Mukesh Kumar Singh Shweta Ranjan 《Transfusion and apheresis science》2021,60(1):102954
Background and aimsPreconditioning using different protocols has been tested to prevent antibody mediated rejection (ABMR) individually for ABO and HLA incompatibility. However, simultaneous presence of both barriers is still less explored. The aim of this study was to report outcomes of institutional desensitization protocol in renal transplant recipients with simultaneous ABO and HLA incompatibility.Materials and methodsThis was a retrospective study conducted from October 2015 to December 2018. All patients with a clinical diagnosis of dialysis dependent chronic kidney disease (CKD), who were prospective coexistent HLA and ABO incompatible renal transplant recipients were included in the study. Patients were followed up and graft function and patient survival was assessed at 1 y from the date of transplant.ResultsMedian and mode baseline anti-A titers were 64, while median and mode baseline anti-B titers were 256. All recipients were discharged by tenth postoperative day. None of the patients had any bleeding complications. Post transplant infection rate was found to be 20 %. A total of 54 therapeutic plasma exchange (TPE) procedures were performed before transplant and 8 were performed after transplant. Graft survival and patient survival was 100 % at 3, 6, 9, and 12 months. Range and mean follow-up period was 15–42 months and 23 months respectively. Mean glomerular filtration rate (GFR) at 1 y using the CKD-EPI equation was 85.25 ± 13.76 mL/min. Biopsy proven ABMR was observed in one case only which was managed with TPE and immunosuppression.ConclusionSimultaneous ABO and HLA incompatibility in renal transplant recipients can be managed successfully with adequate preconditioning and careful monitoring. 相似文献
66.
Renu Sharma Aditya N Aggarwal Shuchi Bhatt Sudhir Kumar SK Bhargava 《Indian Journal of Orthopaedics》2015,49(5):542-548
Background:
de Quervain''s tenosynovitis is an inflammation of abductor pollicis longus (APL) and extensor pollicis brevis (EPB) muscle tendon sheaths at the level of radial styloid process. Its conservative management includes nonsteroidal anti-inflammatory drugs, wrist and thumb immobilization, ultrasonic therapy (US Th.) and low level laser therapy (LLLT). Literature is scanty on comparative efficacy of US Th. and LLLT for its management. This prospective study evaluates outcome of US Th. versus LLLT in de Quervain''s disease.Materials and Methods:
Thirty patients clinically diagnosed de Quervains tenosynovitis were included in the study and randomly assigned to two groups. The average age was 36 years (range: 21-45 years). One group was given LLLT and the other US Th. for a total of 7 exposures on alternate days. The clinical criteria used were Finkelstein''s test, tenderness over radial styloid (Ritchie''s tenderness scale), grip strength, pain (visual analog scale [VAS]) and radiological criteria was ultrasonographic assessment of change in thickness of APL and EPB tendon sheath. They were measured before commencement and at the end of seven sessions of therapy, as per standard procedure.Results:
Significant improvement was seen within both groups in the following outcome measures assessed: Ritchie''s tenderness scale, grip strength and VAS. Finkelstein''s test was not significantly improved in either groups. Ultrasonographic measurement of tendon sheath diameters, the mediolateral (ML), and anteroposterior (AP) diameters was not found to be significantly different in the US Th. group and the laser therapy group after treatment. On comparing both the groups, no statistically significant difference was found. However, looking at the mean values, the grip strength and VAS showed better improvement in the US Th. group as compared to the laser therapy group. 相似文献67.
A comparison of three dosage regimens of sodium stibogluconate in the treatment of visceral leishmaniasis in Kenya 总被引:2,自引:0,他引:2
J D Chulay S M Bhatt R Muigai M Ho G Gachihi J B Were C Chunge A D Bryceson 《The Journal of infectious diseases》1983,148(1):148-155
A prospective randomized trial of three dosage regimens of sodium stibogluconate (Pentostam; Wellcome Foundation, London) to treat visceral leishmaniasis was conducted. Previously untreated patients were randomized to receive 31 doses of sodium stibogluconate (10 mg Sb/kg of body weight per dose) administered once daily for 31 days (group A), every 12 hr for 15 days (group B), or every 8 hr for 10 days (group C). Of the 29 patients who completed treatment, seven of 10 in group B and all of the patients in groups A and C responded to treatment and remained well for one year. One patient in group B failed to respond to treatment, and two others in group B initially responded to treatment but relapsed six weeks after discharge. None of the treatment regimens was toxic. Parasites disappeared from splenic aspirates most quickly and hemoglobin levels rose most rapidly in patients receiving sodium stibogluconate every 8 hr. Treatment of visceral leishmaniasis in Kenya with sodium stibogluconate at a dose of 10 mg Sb/kg every 8 hr for 10 days appears to be a safe alternative to conventional treatment. Its efficacy should be confirmed in a larger number of patients. 相似文献
68.
Dr. Marc J. Zuckerman MD Mark T. Watts PhD Bankim D. Bhatt MD Hoi Ho MD 《Digestive diseases and sciences》1993,38(9):1651-1657
Orally administered [51Cr]EDTA was used to measure intestinal permeability in subjects with infectious diarrhea and in those without gastrointestinal complaints. [51Cr]EDTA was given to 87 subjects: 63 controls (32 normal controls, and 31 disease controls), and 24 patients with infectious diarrhea. Approximately 100 Ci of [51Cr]EDTA was given orally after an overnight fast. Urine was collected for the following 24 hr. Intestinal permeability to [51Cr]EDTA in both normal volunteers and in patients with a variety of diseases not associated with intestinal injury was low and results were in a relatively narrow range. Mean 24-hr urinary excretion of [51Cr]EDTA, calculated as a percent of the administered dose, in controls was 1.6% (0.2–3.5%). Patients with infectious diarrhea associated with invasive pathogens and/or intestinal inflammation had increased excretion of [51Cr]EDTA (mean 6.1%,P<0.0001), with elevated excretions in 75%. These results demonstrate that intestinal infections must be considered as possible causes for increased intestinal permeability as assessed by the [51Cr]EDTA test. 相似文献
69.
Lawrence A. Leiter Deepak L. Bhatt Darren K. McGuire Hwee Teoh Kim Fox Tabassome Simon Shamir R. Mehta Eli I. Lev Róbert G. Kiss Anthony J. Dalby Héctor Bueno Wilhelm Ridderstråle Anders Himmelmann Jayne Prats Yuyin Liu Jane J. Lee John Amerena Mikhail N. Kosiborod Philippe Gabriel Steg 《Journal of the American College of Cardiology》2021,77(19):2366-2377
BackgroundTHEMIS (The Effect of Ticagrelor on Health Outcomes in Diabetes Mellitus Patients Intervention Study) (n = 19,220) and its pre-specified THEMIS-PCI (The Effect of Ticagrelor on Health Outcomes in Diabetes Mellitus Patients Intervention Study-Percutaneous Coronary Intervention) (n = 11,154) subanalysis showed, in individuals with type 2 diabetes mellitus (median duration 10.0 years; HbA1c 7.1%) and stable coronary artery disease without prior myocardial infarction (MI) or stroke, that ticagrelor plus aspirin (compared with placebo plus aspirin) produced a favorable net clinical benefit (composite of all-cause mortality, MI, stroke, fatal bleeding, and intracranial bleeding) if the patients had a previous percutaneous coronary intervention.ObjectivesIn these post hoc analyses, the authors examined whether the primary efficacy outcome (cardiovascular death, MI, stroke: 3-point major adverse cardiovascular events [MACE]), primary safety outcome (Thrombolysis In Myocardial Infarction–defined major bleeding) and net clinical benefit varied with diabetes-related factors.MethodsOutcomes were analyzed across baseline diabetes duration, HbA1c, and antihyperglycemic medications.ResultsIn THEMIS, the incidence of 3-point MACE increased with diabetes duration (6.7% for ≤5 years, 11.1% for >20 years) and HbA1c (6.4% for ≤6.0%, 11.8% for >10.0%). The relative benefits of ticagrelor plus aspirin on 3-point MACE reduction (hazard ratio [HR]: 0.90; p = 0.04) were generally consistent across subgroups. Major bleeding event rate (overall: 1.6%) did not vary by diabetes duration or HbA1c and was increased similarly by ticagrelor across all subgroups (HR: 2.32; p < 0.001). These findings were mirrored in THEMIS-PCI. The efficacy and safety of ticagrelor plus aspirin did not differ by baseline antihyperglycemic therapy. In THEMIS-PCI, but not THEMIS, ticagrelor generally produced favorable net clinical benefit across diabetes duration, HbA1c, and antihyperglycemic medications.ConclusionTicagrelor plus aspirin yielded generally consistent and favorable net clinical benefit across the diabetes-related factors in THEMIS-PCI but not in the overall THEMIS population. 相似文献
70.