全文获取类型
收费全文 | 15562篇 |
免费 | 1043篇 |
国内免费 | 206篇 |
专业分类
耳鼻咽喉 | 382篇 |
儿科学 | 211篇 |
妇产科学 | 289篇 |
基础医学 | 2685篇 |
口腔科学 | 296篇 |
临床医学 | 1243篇 |
内科学 | 3079篇 |
皮肤病学 | 439篇 |
神经病学 | 1173篇 |
特种医学 | 1070篇 |
外科学 | 2091篇 |
综合类 | 85篇 |
现状与发展 | 3篇 |
一般理论 | 10篇 |
预防医学 | 598篇 |
眼科学 | 426篇 |
药学 | 1258篇 |
中国医学 | 153篇 |
肿瘤学 | 1320篇 |
出版年
2024年 | 10篇 |
2023年 | 91篇 |
2022年 | 272篇 |
2021年 | 664篇 |
2020年 | 268篇 |
2019年 | 441篇 |
2018年 | 526篇 |
2017年 | 412篇 |
2016年 | 613篇 |
2015年 | 875篇 |
2014年 | 956篇 |
2013年 | 1044篇 |
2012年 | 1578篇 |
2011年 | 1423篇 |
2010年 | 844篇 |
2009年 | 716篇 |
2008年 | 895篇 |
2007年 | 925篇 |
2006年 | 775篇 |
2005年 | 625篇 |
2004年 | 520篇 |
2003年 | 470篇 |
2002年 | 382篇 |
2001年 | 295篇 |
2000年 | 242篇 |
1999年 | 179篇 |
1998年 | 87篇 |
1997年 | 71篇 |
1996年 | 51篇 |
1995年 | 46篇 |
1994年 | 43篇 |
1993年 | 34篇 |
1992年 | 39篇 |
1991年 | 43篇 |
1990年 | 42篇 |
1989年 | 51篇 |
1988年 | 35篇 |
1987年 | 36篇 |
1986年 | 21篇 |
1985年 | 20篇 |
1984年 | 13篇 |
1983年 | 13篇 |
1982年 | 7篇 |
1981年 | 19篇 |
1980年 | 12篇 |
1979年 | 15篇 |
1978年 | 11篇 |
1977年 | 11篇 |
1976年 | 10篇 |
1975年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 640 毫秒
991.
Jeong Ho Kim Gi-Young Ko Hyun-Ki Yoon Ho-Young Song Sung-Gyu Lee Kyu-Bo Sung 《Korean journal of radiology》2004,5(3):164-170
Objective
To analyze the causes of arterial bleeding after living donor liver transplantation (LDLT) and to evaluate the efficacy of transcatheter arterial embolization (TAE).Materials and Methods
Forty-two sessions of conventional arteriography were performed in 32 of the 195 patients who underwent LDLT during the past 2 years. This was done in search of bleeding foci of arterial origin. TAE was performed with microcoils or gelatin sponge particles. The causes of arterial bleeding, the technical and clinical success rates of TAE and the complications were retrospectively evaluated.Results
Forty-two bleeding foci of arterial origin were identified on 30 sessions of arteriography in 21 patients. The most common cause of bleeding was percutaneous procedures in 40% of the patients (17 of the 42 bleeding foci) followed by surgical procedures in 36% (15/42). The overall technical and clinical success rates of TAE were 21 (70%) and 20 (67%) of the 30 sessions, respectively. The overall technical success rate of TAE for the treatment of bleeding from the hepatic resection margin, hepatic artery anastomotic site and hepaticojejunostomy was only 18% (2/11), whereas for the treatment of bleeding in the other locations the technical and clinical success rates of TAE were 100% and 95%, respectively. No procedure-related major complications occurred.Conclusion
In the case of arterial bleeding after LDLT, percutaneous procedure-related hemorrhages were as common as surgery-related hemorrhages. There were technical difficulties in using TAE for the treatment of hepatic arterial bleeding. However, in the other locations, TAE seems to be safe and effective for the control of arterial bleeding in LDLT recipients. 相似文献992.
Yoon SZ 《Anesthesia and analgesia》2004,99(4):1263; author reply 1263
993.
994.
995.
Park MS Kim KW Yu JS Kim MJ Kim KW Lim JS Cho ES Yoon DS Kim TK Lee SI Lee JD Lee WJ Ha HK Lee JT Yoo HS 《AJR. American journal of roentgenology》2004,183(6):1559-1566
OBJECTIVE: Our aim was to assess preliminary experience with combined conventional T2-weighted and mangafodipir trisodium (MnDPDP)-enhanced T1-weighted MR cholangiography in evaluating early biliary complications of laparoscopic cholecystectomy. SUBJECTS AND METHODS: Conventional heavily T2-weighted MR cholangiography with MnDPDP-enhanced T1-weighted MR cholangiography and ERCP were performed in seven patients with high clinical suspicion of biliary complications after laparoscopic cholecystectomy. The final diagnoses of complications were classified according to the presence and degree of bile duct injury, bile leakage, and retained stones. RESULTS: The diagnoses on MR cholangiography were as follows: complete transection and occlusion of the common bile duct with bile leakage (n = 3), partial strictures of the common bile duct with bile leakage (n = 1), cystic duct leakage (n = 1), partial ligation of an aberrant right hepatic duct (n = 1), and hemorrhage without biliary complication (n = 1). The final diagnoses at surgery (n = 2) and ERCP (n = 5) were as follows: complete transection and occlusion of the common bile duct with bile leakage (n = 2), partial strictures of the common bile duct with bile leakage (n = 2), cystic duct leakage (n = 1), partial ligation of an aberrant right hepatic duct (n = 1), and hemorrhage without biliary complication (n = 1). MR cholangiography accurately yielded the same findings as the final diagnoses, except in one case with partial stricture of the bile duct with bile leakage (overdiagnosed as complete occlusion on MR cholangiography). CONCLUSION: Combined conventional T2-weighted and MnDPDP-enhanced T1-weighted MR cholangiography may eliminate the use of other studies for the imaging of biliary complications after cholecystectomy if this preliminary data can be verified in a larger study. 相似文献
996.
Abnormal bone scan in an adult with osteopoikilosis 总被引:2,自引:0,他引:2
997.
Yoon ST 《The Orthopedic clinics of North America》2004,35(1):95-100
Research in biologic methods of treating disc degeneration is still in its infancy. Many different strategies are being evaluated, but the gene therapy strategy stands out because of its potential for long-term efficacy. Choosing the correct gene for use in gene therapy is critically important. Of the many different classes of potentially therapeutic genes, the regulatory genes hold the most promise. Of the different gene therapy delivery methods, the most work has been performed with viral vectors, either ex vivo or in vivo. Current research now is turning toward in vivo experiments in rabbits. Efficacy and safety will be demonstrated first with smaller animal models. Beyond that, nonhuman primate experiments demonstrating efficacy and safety will be the penultimate step before initiation of human studies. 相似文献
998.
Yoon HE Nonaka K Fukuhara K Ueshima H Sugiura T Kaneda H Shimamoto S Imakita M Iwase K 《Kyobu geka. The Japanese journal of thoracic surgery》2004,57(11):1011-1015
We analyzed 7 patients with malignant pleural mesothelioma who underwent extrapleural pneumonectomy. Six men and a woman had a mean age of 65 years old. The postoperative mortality rate was 14% (1 death) and morbidity, 43% (3 cases). According to staging of International Mesothelioma Interest Group, 2 patients had stage I disease, 1 did stage II, 3 did stage III and 1 did stage IV. Local recurrences were found in 3 patients and metastasis in 2. In patients with local recurrences, 2 had irradiation with chemotherapy and 1, irradiation. In patients with recurrences of metastasis, 1 had chemotherapy and 1, supportive care. Seven patients with extrapleural pneumonectomy and 10 without surgery had median survivals of 16 months and 10 months, 1-year survival rates of 71% and 40% and 2-year survival rates of 57% and 0% respectively (p=0.071). Extrapleural pneumonectomy with adjuvant therapy could be effective treatment for malignant pleural mesothelioma. 相似文献
999.
Edwards CC Karpitskaya Y Cha C Heller JG Lauryssen C Yoon ST Riew KD 《The Journal of bone and joint surgery. American volume》2004,(2):251-256
BACKGROUND: Retrospective clinical studies frequently utilize surgeon records as a source of outcomes data. The accuracy of data derived from surgeon records, however, is unknown. The purpose of the present study was to evaluate the accuracy of surgeon records in documenting the prevalence of subjective adverse outcomes. METHODS: Consecutive patients who had undergone anterior cervical arthrodesis by four spine surgeons during a ten-month period were included. Surgeon records from the routine six-week, three-month, and six-month postoperative visits were examined for documentation of persistent dysphagia and dysphonia. Patients completed surveys inquiring about the presence and magnitude of symptoms at these three time-points. Agreement between the surgeon records and the patient surveys was analyzed with use of the kappa coefficient. RESULTS: One hundred and sixty-six patients had 342 postoperative visits. Dysphagia was documented twenty-six times in the surgeon records, compared with 107 times on the patient surveys. Dysphagia was thus underreported in 80% of cases. Similarly, dysphonia was documented ten times in the surgeon records, compared with seventy-two times on the patient surveys. Poor correlation between the surgeon records and the patient surveys was observed regardless of symptom severity, previous anterior cervical surgery, anterior arthrodesis of three motion segments or more, arthrodesis cephalad to the fifth cervical level, and anterior cervical plate use. Poor correlation between the surgeon records and the patient surveys also was observed for each surgeon, regardless of subspecialty or institution. CONCLUSIONS: Correlation between the surgeon records and the patient surveys was consistently poor, regardless of the specific patient and surgeon factor analyzed. While we chose to study dysphonia and dysphagia, it is conceivable that the results may be generalizable to many situations in which office notes are utilized to ascertain the prevalence of subjective adverse outcomes. These results suggest that the prevalence of such outcomes may be seriously underreported in studies that rely on the retrospective analysis of surgeon records. 相似文献
1000.
Yang KH Yoon CS Park HW Won JH Park SJ 《Archives of orthopaedic and trauma surgery》2004,124(3):169-172
Introduction Adduction of the ipsilateral hip joint is necessary to facilitate closed hip nailing for trochanteric fracture. Even though positioning the patient supine with the perineal post against the ipsilateral medial thigh can change the course of the neurovascular structure in the proximal thigh, there have been no reports regarding the position of the femoral artery in the hip nailing position.Materials and methods We studied the position of the superficial femoral artery in 59 thighs using color-flow duplex scanning method in three hip nailing positions.Results The mean of the distance between the superficial femoral artery and the femur in 48 normal limbs was 20.28 mm in neutral position (D1), 11.85 mm in 20o adduction (D2), and 9.53 mm in 20o adduction plus 20o internal rotation of the foot plate (D3). The distances D2 and D3 were always shorter than D1 (p<0.001). D3 was less than 10 mm in 30 of the normal limbs (62.5%) and less than 5 mm in 4 (8%). In 11 patients who sustained a trochanteric fracture, the mean of D1, D2, and D3 in the injured limbs was 25.28 mm, 17.98 mm, and 14.38 mm, respectively. The mid-thigh circumference and D3 of the injured limbs were always greater than those of the normal limbs (p<0.001). However, D3 of both sides was less than 10 mm in 3 patients.Conclusion To lessen the vascular injury during hip nailing, we recommend that the limb be placed in neutral position during preparation of the interlocking holes. 相似文献