全文获取类型
收费全文 | 1183篇 |
免费 | 100篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 55篇 |
妇产科学 | 43篇 |
基础医学 | 153篇 |
口腔科学 | 35篇 |
临床医学 | 106篇 |
内科学 | 206篇 |
皮肤病学 | 46篇 |
神经病学 | 46篇 |
特种医学 | 42篇 |
外科学 | 225篇 |
综合类 | 29篇 |
预防医学 | 81篇 |
眼科学 | 37篇 |
药学 | 117篇 |
中国医学 | 4篇 |
肿瘤学 | 45篇 |
出版年
2024年 | 7篇 |
2023年 | 17篇 |
2022年 | 29篇 |
2021年 | 52篇 |
2020年 | 33篇 |
2019年 | 42篇 |
2018年 | 55篇 |
2017年 | 38篇 |
2016年 | 26篇 |
2015年 | 48篇 |
2014年 | 42篇 |
2013年 | 59篇 |
2012年 | 98篇 |
2011年 | 94篇 |
2010年 | 49篇 |
2009年 | 36篇 |
2008年 | 34篇 |
2007年 | 42篇 |
2006年 | 51篇 |
2005年 | 48篇 |
2004年 | 50篇 |
2003年 | 35篇 |
2002年 | 27篇 |
2001年 | 12篇 |
2000年 | 25篇 |
1999年 | 15篇 |
1998年 | 8篇 |
1997年 | 7篇 |
1995年 | 5篇 |
1994年 | 10篇 |
1993年 | 10篇 |
1992年 | 16篇 |
1991年 | 15篇 |
1990年 | 11篇 |
1989年 | 6篇 |
1988年 | 15篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 7篇 |
1983年 | 6篇 |
1980年 | 5篇 |
1978年 | 6篇 |
1975年 | 4篇 |
1971年 | 6篇 |
1969年 | 7篇 |
1968年 | 6篇 |
1967年 | 5篇 |
1964年 | 8篇 |
1963年 | 8篇 |
1962年 | 5篇 |
排序方式: 共有1286条查询结果,搜索用时 15 毫秒
11.
Ahmad Aly Glyn G. Jamieson David I. Watson Peter G. Devitt Roger Ackroyd Chris J. Stoddard 《Journal of gastrointestinal surgery》2010,14(3):470-475
Background
Reflux of duodeno-gastric fluid is a significant problem after esophagectomy with gastric conduit reconstruction. Symptoms may be severe and impact considerably upon the quality of life. Previous studies have suggested that a fundoplication type anastomosis may limit post-esophagectomy reflux. 相似文献12.
Bioactive natural products from endophytic fungi, isolated from higher plants, are attracting considerable attention from natural product chemists and biologists alike as indicated by the steady increase of publications devoted to this topic during recent years (113 research articles on secondary metabolites from endophytic fungi in the period of 2008–2009, 69 in 2006–2007, 36 in 2004–2005, 14 in 2002–2003, and 18 in 2000–2001). This overview will highlight the chemical potential of endophytic fungi with focus on the detection of pharmaceutically valuable plant constituents, e.g. paclitaxel, camptothecin and podophyllotoxin, as products of fungal biosynthesis. In addition, it will cover new bioactive metabolites reported in recent years (2008–2009) from fungal endophytes of terrestrial and mangrove plants. The presented compounds are selected based on their antimicrobial, antiparasitic, cytotoxic as well as neuroprotective activities. Furthermore, possible factors influencing natural product production in endophytes cultivated in vitro and hence the success of bioprospecting from endophytes are likewise discussed in this review. 相似文献
13.
Masafumi Nakamura Junji Ueda Hiroshi Kohno Mohamed Yahia F. Aly Shunichi Takahata Shuji Shimizu Masao Tanaka 《Surgical endoscopy》2011,25(3):867-871
Background
Laparoscopic distal pancreatectomy (Lap-DP) is one of the most accepted laparoscopic procedures in the field of pancreatic surgery. However, pancreatic fistula remains a major and frequent complication in Lap-DP, as in open surgery. The aim of this retrospective study is to clarify the advantages of prolonged peri-firing compression (PFC) with a linear stapler for prevention of pancreatic fistula after laparoscopic distal pancreatectomy. 相似文献14.
BACKGROUND: Surgery for patients with malignant obstructive jaundice carries high morbidity and mortality rates. Preoperative biliary drainage (PBD) has been used in an attempt to improve the outcome in these patients. AIM: To review the evidence in the literature on whether PBD improves postoperative morbidity and mortality in obstructive jaundice patients. MEHOD: Using Medline a literature search was performed for papers published in English from January 1980 to October 2000, using the text words 'obstructive jaundice', 'preoperative', 'drainage' and 'stent'. All retrieved papers which reported experimental or clinical observations relevant to the study aim were carefully analysed and the findings are summarised in this review. RESULTS AND CONCLUSION: There is no evidence in the literature to support the view that routine PBD improves postoperative morbidity and mortality in patients with obstructive jaundice undergoing resection. PBD has its own complications that cancel out its benefits. However, PBD could be beneficial in patients presenting with sepsis, coagulation abnormalities or malnutrition. 相似文献
15.
Hatem G. Said AbdulRahman A. Babaqi Aly Mohamadean Ahmed H. Khater Mohamed H. Sobhy 《International orthopaedics》2014,38(5):1063-1066
Purpose
The proximal part of the long head of the biceps muscle has become a recognized cause of significant shoulder pain. Tenodesis of the long head of the biceps has been advocated as a treatment for pain resulting from biceps tendonopathy, biceps instability, and biceps tendon tears. All of these pathologies may be encountered during rotator cuff, SLAP or Bankart surgery, or in isolation. Several techniques have been described for this tenodesis, including various arthroscopic and subpectoral methods.Methods
We present a modified bone bridge technique of Mazzocca et al., for subpectoral biceps tenodesis. In this technique we tenodese the tendon through two bone tunnels back over the muscle itself without implants.Results
Application of this technique on 30 patients (ages 25–48 years) with short-term follow-up of 12–18 months showed statistically significant improvement (P value < 0.05) of the mean Constant and Oxford shoulder scores (pre-operative mean scores were 39.03 and 21.3, respectively, while postoperative mean scores were 76.43 and 44.8, respectively).Conclusion
This technique has potential advantages as it allows the possibility of adjusting the tension of the biceps tendon before final suturing, in addition to quicker soft tissue healing. 相似文献16.
High alcohol intake in deceased donors has no effect on pancreas graft survival: a registry analysis 下载免费PDF全文
Reza Motallebzadeh Mohamed Aly Muna El‐Khairi Martin Drage Jonathan Olsburgh Christopher J. Callaghan 《Transplant international》2017,30(2):170-177
Outcomes of pancreas transplantation from donors with high alcohol consumption are poorly described. The UK Transplant Registry was used to determine whether donor alcohol intake influenced pancreas survival in simultaneous pancreas–kidney (SPK) transplants performed between 2006 and 2012 (n = 770). Recipients were stratified by donor alcohol intake: group I (n = 122)—high recent alcohol intake (>21 or >14 units of alcohol/week in males or females, respectively) or previous alcohol abuse and group II (n = 648)—low/unknown current intake and no previous alcohol abuse. Median current alcohol intake was higher in group I than group II: 36.3 vs. 10 units/week; P < 0.001. One‐ and five‐year pancreas graft survivals were 88.5% and 73.6% in group I, and 87% and 74.9% in group II. There was no difference in unadjusted graft survival between groups I and II (P = 0.76), and no difference between group II and a subgroup of group I with a donor history of alcohol abuse and high current intake (P = 0.26), or from donors with current alcohol consumption of >50 units/week (P = 0.41). Pancreas donors with past alcohol abuse or current high intake are common, and graft outcomes appear to be acceptable. This analysis suggests that high donor alcohol intake, by itself, should not exclude consideration of pancreas transplantation. 相似文献
17.
Antonio Pellegrino Gianluca Raffaello Damiani Giorgio Fachechi Cecilia Pirovano Maria Gaetani Aly Youssef 《Updates in surgery》2017,69(4):517-522
The objective of this study is to perform an economic analysis and examine the influence of procedural volume of our hospital, evaluating the accounting systems of Robotic radical hysterectomy (RRH) vs Laparoscopic radical hysterectomy (TLRH) in patients with cervical carcinoma, due to the costs widely variable and lack in literature. Costs were collected prospectively, from March 2010 to March 2016. Direct costs were determined by examining the overall medical pathway for each type of intervention. 52 patients with cervical carcinoma, which were matched by age, body mass index, tumor size, International Federation of Gynecology and Obstetrics (FIGO) stage, comorbidity, previous neoadjuvant chemotherapy, histology type, and tumor grade to obtain homogeneous samples. Surgical time was similar for both the groups. RRH was associated with a significantly less (EBL) estimated blood loss (P = 0.000). The overall median length of follow-up was of 59 months. The cost of the robot-specific supplies was €2705 per intervention. When considering overall medical surgical care, the patient treatment average cost of an RRH was €5650,31 with an hospital stay (HS) of 3.58 days (SD ± 1) vs €3750.86 for TRLH, with an HS of 4.27 days (SD ± 1.79). Our results are similar to Finnish data; the costs of robot-assisted hysterectomies were 1.5 times higher than TLRH. The main drivers of additional costs are robotic disposable instruments, which are not compensated by the hospital room costs and by an experienced team staff. Implementation of strategies to reduce the cost of robotic instrumentation is due. RRH resulted less expensive than robotic simple hysterectomy for benign conditions. 相似文献
18.
19.
Al Aly Z Abbas S Moore E Diallo O Hauptman PJ Bastani B 《Clinical transplantation》2005,19(5):683-689
BACKGROUND: The outcome of solid organ transplantation has dramatically improved after the introduction of the calcineurin inhibitor cyclosporine. With the increasing longevity of heart transplant recipients, the long-term effects of cyclosporine on renal function have become more evident. The natural history of kidney function following orthotopic heart transplant is not well defined and long-term follow up studies are scant. METHODS: We conducted an observational study on patients who received a heart transplant at Saint Louis University Hospital between January 1, 1983 and December 31, 1988. Patients were followed up for 15 yr or until death whichever occurred first. In order to assess the effect of heart transplantation and cyclosporine exposure on long-term renal function we restricted the statistical analysis to patients who survived the first year post-transplantation. RESULTS: A total of 68 patients received orthotopic heart transplants at Saint Louis University Hospital between 1983 and 1988. Forty-eight (71%) patients survived for more than 1 yr. All patients were treated with cyclosporine based triple immunosuppressive regimen, with gradual cyclosporine dose reduction over time. The mean duration of follow-up was 8 yr. The estimated GFR at 5 and 10 yr post-transplant were significantly lower than estimated GFR at baseline and 1 yr post-transplant. There was no significant difference between estimated GFR at 15 yr and estimated GFR at baseline or 1 yr post-transplant. The cumulative incidence of chronic renal failure (GFR < or = 29 mL/min/1.73 m2) at 5, 10 and 15 yr was 4.2, 10.4 and 12.5%, respectively (p < 0.05). The cumulative incidence of severe chronic renal failure (GFR < or = 15 mL/min/1.73 m2) at 5, 10 and 15 yr was 2.1, 8.3 and 8.3%, respectively. The mortality rate was 8, 37, and 52% at 5, 10, and 15 yr, respectively. The 10 and 15 yr survivors had an estimated GFR at 1 yr post-transplant that was significantly higher than the non-survivors. Age, pre-transplantation estimated GFR, pre-transplantation diabetes and pre-transplantation hypertension are risk factors associated with > or = 10 mL/min/1.73 m2 decrement in estimated GFR. CONCLUSION: Heart transplant survivors beyond the first year post-transplant have a significant decrease in renal function and significant mortality observed over time. Age, pre-transplant GFR, pre-transplant diabetes and pre-transplant hypertension are important risk factors for decrement in renal function. 相似文献
20.