全文获取类型
收费全文 | 7053篇 |
免费 | 386篇 |
国内免费 | 35篇 |
专业分类
耳鼻咽喉 | 115篇 |
儿科学 | 519篇 |
妇产科学 | 47篇 |
基础医学 | 578篇 |
口腔科学 | 109篇 |
临床医学 | 537篇 |
内科学 | 1915篇 |
皮肤病学 | 114篇 |
神经病学 | 453篇 |
特种医学 | 222篇 |
外科学 | 1259篇 |
综合类 | 181篇 |
一般理论 | 2篇 |
预防医学 | 205篇 |
眼科学 | 284篇 |
药学 | 441篇 |
中国医学 | 27篇 |
肿瘤学 | 466篇 |
出版年
2024年 | 22篇 |
2023年 | 73篇 |
2022年 | 132篇 |
2021年 | 330篇 |
2020年 | 135篇 |
2019年 | 192篇 |
2018年 | 292篇 |
2017年 | 182篇 |
2016年 | 202篇 |
2015年 | 208篇 |
2014年 | 326篇 |
2013年 | 467篇 |
2012年 | 576篇 |
2011年 | 552篇 |
2010年 | 292篇 |
2009年 | 267篇 |
2008年 | 440篇 |
2007年 | 392篇 |
2006年 | 378篇 |
2005年 | 331篇 |
2004年 | 284篇 |
2003年 | 225篇 |
2002年 | 187篇 |
2001年 | 100篇 |
2000年 | 102篇 |
1999年 | 76篇 |
1998年 | 49篇 |
1997年 | 36篇 |
1996年 | 27篇 |
1995年 | 25篇 |
1994年 | 17篇 |
1993年 | 25篇 |
1992年 | 44篇 |
1991年 | 51篇 |
1990年 | 40篇 |
1989年 | 53篇 |
1988年 | 42篇 |
1987年 | 23篇 |
1986年 | 39篇 |
1985年 | 29篇 |
1984年 | 22篇 |
1983年 | 13篇 |
1981年 | 18篇 |
1979年 | 21篇 |
1976年 | 12篇 |
1975年 | 12篇 |
1973年 | 12篇 |
1971年 | 9篇 |
1970年 | 10篇 |
1969年 | 18篇 |
排序方式: 共有7474条查询结果,搜索用时 15 毫秒
51.
Rishi Narasimhan Stuart Kennedy Sandeep Tewari Deeksha Dhingra Ibrahim Zardawi 《Indian Journal of Orthopaedics》2011,45(2):181-184
Synovial chondromatosis is cartilaginous metaplasia of mesenchymal remnants of synovial tissue of the joints. Its main characteristic is the formation of cartilaginous nodules in the synovium and inside the articular space (loose bodies). It usually presents between the third and fifth decades and is rare in children. It presents as a mono-articular pathology affecting large joints such as the knee, hip, and elbow. The main symptoms are pain, swelling, and limitation of movements in the affected joint. Diagnosis is made by panoramic radiographs, computed tomography scan, and mainly magnetic resonance imaging and on surgery. The authors describe of synovial chondromatosis presenting in the elbow of an 11 year-old girl which is unreported to the best of our knowledge. 相似文献
52.
Mahesh Chandra Misra Sandeep Aggarwal Sandeep Guleria Vulatheru Seenu Amar Pal Bhalla 《JSLS, Journal of the Society of Laparoendoscopic Surgeons》2008,12(3):252-255
BACKGROUND: Newer, energy-based devices like the ultrasonic coagulator (Harmonic Scalpel, Ethicon Endo-Surgery, Inc., Cincinnati, OH) and the LigaSure vessel-sealing system (Valleylab, Boulder, CO) are increasingly being used in advanced laparoscopic procedures. Use of these devices has resulted in shorter operative time, less blood loss, and lower conversion rates. We present our experience with these devices for laparoscopic removal of adrenal and extra-adrenal tumors. METHODS: Ten patients with adrenal tumors and 4 with extra-adrenal tumors were operated on laparoscopically with the ultrasonic shears and LigaSure vessel-sealing system. The entire surgery was carried out using these energy-based devices without using any clips or sutures. RESULTS: No conversions were necessary. None of the patients experienced any major intraoperative or postoperative bleeding. The mean size of the tumor was 6.2 cm (range, 3 to 8). The mean operative time was 123 minutes (range, 80 to 210), and the mean blood loss was 70 mL (range, 10 to 150). Histopathology revealed pheochromocytomas in 7 patients. CONCLUSIONS: Use of the LigaSure vessel-sealing device along with ultrasonic shears for laparoscopic removal of adrenal and extra-adrenal tumors is safe and effective. 相似文献
53.
Aditya Kapoor John C. Luscombe A. D. Reading 《European journal of orthopaedic surgery & traumatology : orthopedie traumatologie》2007,17(4):381-383
Deep infections do occur during hip resurfacing despite all precautions. We present the method and use of the acetabular bone stock preserving Explant system in the removal of infected well-fixed cementless acetabular components and the technique of using an antibiotic impregnated cement spacer to provide a functional joint, enabling the patient to mobilise with minimal discomfort between two staged revision procedures. 相似文献
54.
Volvulus of an Appendiceal Mucocele: Report of a Case 总被引:1,自引:0,他引:1
Few cases of volvulus of an appendiceal mucocele have been reported. The mechanism of torsion seems to be similar to that
suggested for ovarian or appendegeal torsion, where a solid organ or mass fixed onto a narrow stalk is a precondition. We
report the case of a young woman who presented with signs and symptoms of acute appendicitis. Computed tomography showed a
cystic mass of fluid consistency in the right lower quadrant. An emergency laparoscopy revealed a 720° torsion of a gangrenous
mucocele around the proximal part of the appendix. We performed a laparoscopic appendectomy and she recovered uneventfully.
The presentation of volvulus of an appendiceal mucocele can mimic other common conditions. Prompt surgical intervention is
essential to prevent gangrene and perforation. The combination of a cystic, right lower quadrant mass, and clinical findings
suggestive of acute appendicitis should alert the clinician to include volvulus of an appendiceal mucocele in the differential
diagnosis. 相似文献
55.
Singh RK Kapoor S Sahni P Chattopadhyay TK 《Annals of the Royal College of Surgeons of England》2007,89(5):490-493
INTRODUCTION
Haemangioma is the most common liver tumour. Treatment is indicated for symptomatic tumours, rapid increase in size, rupture or doubt in diagnosis. There is continuing debate regarding the ideal method of surgical treatment for liver haemangiomas, with some surgeons favouring enucleation over liver resection.PATIENTS AND METHODS
Retrospective analysis of prospectively compiled database of patients who were surgically treated for liver haemangioma.RESULTS
Between 1987 and 2003, we operated on 21 patients with liver haemangioma. Pre-operative diagnosis on imaging was made in 16 patients (13 symptomatic, 3 had progressive increase in size). In five patients, the indication of surgery was uncertain diagnosis. Enucleation was performed in 9 patients and liver resection in 12. The size of the haemangioma was similar in the enucleation and resection groups (8.9 cm versus 10 cm; P = 0.85). The mean intra-operatiive blood loss was significantly less in the enucleation group (400 ml versus 1330 ml; P = 0.004). The mean operative time was significantly less in the enucleation group as compared to the resection group (170 min versus 230 min; P = 0.035). Five patients had major postoperative morbidity in the resection group as compared to none in the enucleation group (P = 0.045). The duration of hospital stay was significantly longer in the resection group.(9.9 days versus 5.6 days; P = 0.005).CONCLUSIONS
Enucleation of liver haemangiomas is safer, quicker and associated with less morbidity than liver resection. Except for some situations, such as uncertain diagnosis or total replacement of a lobe, we recommend enucleation as the surgical procedures of choice for the treatment of hepatic haemangiomas. 相似文献56.
Surgical management for late presentation of supracondylar humeral fracture in children 总被引:1,自引:0,他引:1
PURPOSE: To report the results of surgical management for late-presenting displaced supracondylar fractures of the humerus in children. METHODS: Between February 2002 and June 2003, 40 children (mean age, 7 years) with late presentation (range, 2-12 days) of displaced supracondylar humeral fractures were prospectively recruited. Gentle closed manipulation under image intensification was attempted in all patients, except one with a compound open fracture. Manipulation was successful in 25 patients and percutaneous skeletal stabilisation with Kirschner wires was performed. The remaining 15 patients were treated with open reduction and Kirschner wire fixation, using a mediolateral approach. RESULTS: The mean delay in presentation was approximately 4 days. No patients presenting more than 7 days after injury had the fracture reduced by closed manipulation. The mean hospital stay was 41 hours. At the final follow-up (mean, 18 months), 88% of the patients had a satisfactory result, according to Flynn's criteria. CONCLUSION: Operative treatment for late presentation of supracondylar humeral fractures in children is effective. It minimises the risk of complications and the need for continuous traction or corrective osteotomy. 相似文献
57.
58.
Bassel G. Bachir Armen G. Aprikian Jonathan I. Izawa Joseph L. Chin Yves Fradet Adrian Fairey Eric Estey Niels Jacobsen Ricardo Rendon Ilias Cagiannos Louis Lacombe Jean-Baptiste Lattouf Anil Kapoor Edward Matsumoto Fred Saad David Bell Peter C. Black Alan I. So Wassim Kassouf 《Urologic oncology》2014,32(4):441-448
ObjectiveTo evaluate the effect of body mass index (BMI) on the outcomes of patients with urinary tract carcinoma treated with radical surgery.Materials and methodsData were collected from 10 Canadian centers on patients who underwent radical cystectomy (RC) (1998–2008) or radical nephroureterectomy (RNU) (1990–2010). Various parameters among subsets of patients (BMI<25, 25≤BMI<30, and BMI≥30 kg/m2) were analyzed. Kaplan-Meier and multivariate analyses were performed to assess the effect of BMI on overall survival, disease-specific survival, and recurrence-free survival (RFS).ResultsAmong the 847 RC and 664 RNU patients, there was no difference in histology, stage, grade, and margin status among the 3 patient subsets undergoing either surgery. However, RC patients with lower BMIs (<25 kg/m2) were significantly older (P = 0.004), had more nodal metastasis (P = 0.03), and trended toward higher stage (P = 0.052). RNU patients with lower BMIs (<25 kg/m2) were significantly older (P = 0.0004) and fewer received adjuvant chemotherapy (P = 0.04) compared with those with BMI≥30 kg/m2; however, there was no difference in tumor location (P = 0.20), stage (P = 0.48), and management of distal ureter among the groups (P = 0.30). On multivariate analysis, BMI was not prognostic for overall survival, disease-specific survival, and RFS in the RC group. However, BMI≥30 kg/m2 was associated with more bladder cancer recurrences and worse RFS in the RNU group (HR = 1.588; 95% CI: 1.148–2.196; P = 0.0052).ConclusionsIncreased BMI did not influence survival among RC patients. BMI≥30 kg/m2 is associated with worse bladder cancer recurrences among RNU patients; whether this is related to difficulty in obtaining adequate bladder cuff in patients with obesity requires further evaluation. 相似文献
59.
60.
Ali US Sengupta K Andankar P Saraf S Chawla A Deshpande S 《Pediatric nephrology (Berlin, Germany)》2004,19(9):1050-1052
Three exclusively breastfed term neonates were admitted with lethargy, poor feeding, and oligoanuria. All three babies were severely dehydrated and had a weight loss ranging from 18% to 40%. Serum sodium of more than 180 mEq/l and renal failure were observed in all three. Two had very high creatinine levels of 9.5 mg/dl and 6.7 mg/dl. Both these babies also had multiple seizures. One baby required mechanical ventilation. All three babies showed markedly hyperechoic renal medullary pyramids with speckled foci suggestive of crystal deposition that reversed completely on therapy. Urine showed abundant urate crystals in two and an elevated calcium/creatinine ratio of 1.6 in one. There was no evidence of distal renal tubular acidosis, Bartter syndrome, or high serum calcium. Supersaturation of the ions in a markedly hypertonic renal medulla may have led to crystallization, with resolubilization with hydration and restoration of good urine output. The hypernatremic dehydration was primarily due to lactation failure leading to inadequate fluid intake in the face of ongoing insensible losses. High breast milk sodium may have been a contributory factor in one patient. 相似文献