全文获取类型
收费全文 | 13105篇 |
免费 | 760篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 153篇 |
儿科学 | 289篇 |
妇产科学 | 430篇 |
基础医学 | 1766篇 |
口腔科学 | 495篇 |
临床医学 | 1193篇 |
内科学 | 3087篇 |
皮肤病学 | 235篇 |
神经病学 | 1227篇 |
特种医学 | 304篇 |
外科学 | 1609篇 |
综合类 | 62篇 |
一般理论 | 7篇 |
预防医学 | 935篇 |
眼科学 | 246篇 |
药学 | 946篇 |
中国医学 | 58篇 |
肿瘤学 | 904篇 |
出版年
2024年 | 13篇 |
2023年 | 113篇 |
2022年 | 322篇 |
2021年 | 580篇 |
2020年 | 283篇 |
2019年 | 430篇 |
2018年 | 510篇 |
2017年 | 334篇 |
2016年 | 348篇 |
2015年 | 409篇 |
2014年 | 544篇 |
2013年 | 695篇 |
2012年 | 1095篇 |
2011年 | 1137篇 |
2010年 | 611篇 |
2009年 | 533篇 |
2008年 | 821篇 |
2007年 | 779篇 |
2006年 | 751篇 |
2005年 | 662篇 |
2004年 | 601篇 |
2003年 | 528篇 |
2002年 | 449篇 |
2001年 | 145篇 |
2000年 | 116篇 |
1999年 | 114篇 |
1998年 | 77篇 |
1997年 | 54篇 |
1996年 | 55篇 |
1995年 | 58篇 |
1994年 | 52篇 |
1993年 | 46篇 |
1992年 | 76篇 |
1991年 | 46篇 |
1990年 | 44篇 |
1989年 | 48篇 |
1988年 | 39篇 |
1987年 | 35篇 |
1986年 | 15篇 |
1985年 | 24篇 |
1984年 | 28篇 |
1983年 | 12篇 |
1982年 | 13篇 |
1981年 | 14篇 |
1980年 | 12篇 |
1979年 | 19篇 |
1978年 | 15篇 |
1971年 | 19篇 |
1969年 | 16篇 |
1967年 | 14篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Mathieu MC Bonhomme-Faivre L Rouzier R Seiller M Barreau-Pouhaer L Travagli JP 《Annals of surgical oncology》2007,14(8):2233-2238
Background In breast carcinomas treated with neoadjuvant chemotherapy, intraoperative identification of residual tumors may be difficult.
A well-tolerated, low-diffusion charcoal suspension has been designed to tattoo breast tumors. In this study, we investigated
whether this tattooing technique is efficient for localizing the tumor after treatment with chemotherapy.
Methods In a series of 109 patients with large breast tumors, a 4% or 10% charcoal suspension was injected at the time of the initial
biopsy before preoperative chemotherapy.
Results Tolerance was good. After three or four cycles of chemotherapy, 91 patients underwent conservative treatment, and the surgical
specimen was examined intraoperatively. The charcoal was detected in 94% of the cases. The charcoal was seen in the nodule
or at the periphery in the surgical specimen without any acute inflammatory reaction or diffusion.
Conclusions On the basis of these results, this micronized charcoal suspension at a defined granulometry and a concentration of 10% seems
to be ideal for tattooing breast carcinomas over a period of 3 months in patients in whom neoadjuvant chemotherapy is planned. 相似文献
102.
Pawe? Reichert Roman Rutowski Krzysztof Zimmer Jerzy Gosk Krzysztof Bogdan Roman Wiacek 《Chirurgia narzadów ruchu i ortopedia polska》2007,72(3):175-179
Purpose of work was estimation of the results of treatment of pseudoarthrosis of the long bone with the method of decortication, with use of autogenic bone depends on kind of pseudoarthrosis and kind of osteosynthesis. In the years 1995-2005 56 patients were treated because of pseudoarthrosis of long bone in our Clinic. Pseudoarthrosis is classified according to Weber-Cech classification. In the methodology of clinical estimation and subjective estimation of the patient Stewart and Hundley and Anderson classification were used. Union was achieved in 51 cases. Time of bone union achievement was 5 months. The results of treatment are depends on morfology of pseudoartrosis and are independs of kind of osteosynthesis. 相似文献
103.
Jacek Semenowicz Bogdan Koczy Przemys?aw Czuma Bart?omiej Pijet Tomasz Olszewski Roman Walo 《Chirurgia narzadów ruchu i ortopedia polska》2007,72(1):33-36
The Avantage double mobility press-fit cup was devised by Dr. Bousquet in the 70's to bring reasonable response to a problem of recurrent dislocation after total hip arthroplasty. The cup is attached to the femoral head by a bipolar polyethylene liner. The polyethylene liner moves freely inside a shiny--polished metal cup. The angular range of motion before impingement is increased by the mobility of the liner. The double connection (cup-liner, liner-head) reduces the stress on the metal cup and improve the stability of the prosthesis. The solution has proved to be efficient in reducing dislocation risk and maintains at the same time the appropriate range of motion. Between January 2004 and November 2005, 113 hip arthroplasties in 108 women with use of the double mobility cup were performed. The cemented version of the Avantage cup was inserted in 15 patients (mean age--76.9 years). Uncemented, HA coated implant was used in 98 patients (with mean age of 55 years). The mean follow-up was 20.4 months. No one patient was lost to follow-up. No postoperative dislocation was observed during follow-up. There was no unwanted leg lengthening greater than 1 cm. The Avantage cup may be indicated in any primary total hip arthroplasty especially in those with increased risk of postoperative dislocations. This cup enables a correct balance of the hip without a need of the unwanted lengthening of the leg. 相似文献
104.
Thigh pain has been consistently reported with cementless hip arthroplasty. The correlation between thigh pain and radiological findings and the clinical significance of thigh pain have not been studied in any detail. We carried out a retrospective study to analyse the performance of a proximally porous-coated cementless femoral component. Ninety-eight total hip arthroplasties were followed up clinically and radiologically for an average of 33 months (range: 12 to 64) after operation. The clinical results were good or excellent in 85 cases (87%). Thirteen patients (13%) reported thigh pain at latest follow-up. Subsidence of the stem was recorded in 10 cases, cortical thickening occurred in 14 hips (14%), and 17 hips (17%) presented proximal osteopenia. Proximally, radiolucent lines were observed in 11 cases. Thigh pain correlated with radiolucent lines, femoral thickening, fibrous fixation and stem migration. Bone remodelling was noted to continue even five years after implantation. Our observations demonstrated bone ingrowth in the majority of the cases and a low incidence of thigh pain. The correlation between radiological changes and thigh pain suggests implant micromotion and migration in some hips. Patients with thigh pain, changes in the proximal femur and progressive subsidence need further clinical and radiological follow-up. 相似文献
105.
Antonio Roman Nicolás Manito Josep Maria Campistol Valentín Cuervas-Mons Luis Almenar Manuel Arias Fernando Casafont Domingo del Castillo María G. Crespo-Leiro Juan F. Delgado J. Ignacio Herrero Paloma Jara José M. Morales Mercedes Navarro Federico Oppenheimer Martín Prieto Luis A. Pulpón Antoni Rimola Piedad Ussetti 《Transplantation reviews (Orlando, Fla.)》2014,28(2):84-91
Transplant recipients receiving immunosuppressive therapy are at increased risk of active cytomegalovirus (CMV) infection and disease. Without appropriate prophylaxis, as many as 80% of solid organ transplant recipients may experience CMV infection. In addition to the direct effects of CMV, infection may be associated with a range of indirect effects, including an increase in risk of other infections, as well as a higher incidence of rejection, graft loss and death. The indirect effects of CMV infection can vary depending on the transplanted organ. For example, CMV-infected kidney transplant recipients may be at increased risk of cardiovascular disease and diabetes, while CMV infection in liver transplant recipients may potentiate hepatitis C infection and increase the risk of post-transplant lymphoproliferative disease. Indirect effects result from a number of pathological processes, including immune modulation and immunosuppression, generation of cytotoxic, pro-inflammatory responses, and smooth muscle proliferation. Prophylactic treatment with antiviral medication can reduce the risk of CMV disease, thereby improving graft survival and overall outcomes, particularly in kidney and heart transplant recipients. Antiviral prophylaxis should be considered for all patients at risk of CMV infection after solid organ transplantation. In this paper we review the main indirect effects of CMV infection in solid organ transplant recipients, and the impact of CMV prophylaxis on these effects. 相似文献
106.
Bertalanffy P Hoerauf K Fleischhackl R Strasser H Wicke F Greher M Gustorff B Kober A 《Anesthesia and analgesia》2004,98(1):220-3, table of contents
Patients with trauma or medical illnesses transported to the hospital by ambulance have a frequent incidence of motion sickness. Because the administration of drugs in the ambulance is prohibited by law in Austria, the noninvasive Korean hand acupressure point at K-K9 may be an alternative against nausea and vomiting. We enrolled 100 geriatric patients with minor trauma, randomizing them into a K-K9 group and a sham acupressure group. We recorded visual analog scores (VAS) for nausea and for the patient's overall satisfaction with the treatment, hemodynamic variables, and peripheral vasoconstriction. In the K-K9 group, a significant (P < 0.01) increase in nausea was recorded in all cases: from VAS of 0 mm to 25 +/- 6 mm. A similarly significant (P < 0.01) increase was registered in the sham group: from VAS of 0 mm to 83 +/- 8 mm. However, at the time of arrival in the hospital, nausea scores were significantly different between the K-K9 group and the sham group (P < 0.01). Although all patients had been vasoconstricted at the emergency site before treatment, there was a significant difference (P < 0.01) between groups with regard to the number of vasoconstricted patients at the hospital (4 and 46 constricted and dilated, respectively, in the K-K9 group versus 48 and 2 constricted and dilated, respectively, in the sham group). On arrival in the hospital, a significant difference (P < 0.01) in heart rate was noted between the K-K9 group and the sham group (65 +/- 6 bpm versus 98 +/- 8 bpm). The patients' overall satisfaction with the provided care was significantly higher (P < 0.01) in the K-K9 group (19 +/- 9 mm VAS) than in the sham group (48 +/- 12 mm VAS). Neither group experienced a significant change in blood pressure. K-K9 stimulation was an effective and simple treatment for nausea during emergency care and significantly improved patient satisfaction. IMPLICATIONS: Korean hand acupressure at the K-K9 point was effective in reducing nausea and subjective symptoms of motion sickness in emergency trauma transport of patients at high risk of motion sickness. 相似文献
107.
Waclaw Weyde Roman Badowski Magdalena Krajewska Jozef Penar Krzysztof Moron Marian Klinger 《Nephrology, dialysis, transplantation》2004,19(6):1618-1621
BACKGROUND/AIMS: Catheterization of the femoral vein is a safe and recommended method of temporary access for haemodialysis. In some patients, however, because of the lack of other possibilities, it is necessary to maintain long-term femoral cannulation. The aim of the study was to evaluate the frequency of stenosis after prolonged femoral cannulation. METHODS: The 24 patients incorporated in the study were divided into two groups. Group 1 consisted of 10 end-stage kidney failure patients (four females and six males, aged 32-75 years, average 55.6+/-13.6 years) in whom femoral catheters were maintained for less than 2 weeks (5-14 days, average 9.3+/-3.6 days). Group 2 included 14 chronic haemodialysis patients (six females and eight males aged 23-65 years, average 49.5+/-13.27 years). The time of catheter maintenance ranged from 2 to 16 weeks (average 6.4+/-4.2 weeks). Femoral and iliac vein status was evaluated using magnetic resonance imaging. RESULTS: A feature of venous stenosis of both the femoral and iliac veins was disclosed in four patients in whom femoral cannulation lasted more than 4 weeks. There were no stenoses in group 1. CONCLUSION: Long-term femoral cannulation for more than 4 weeks may be associated with a significant risk of stenosis in the femoral and/or external iliac veins. 相似文献
108.
Major bile duct injuries after laparoscopic cholecystectomy: A tertiary center experience 总被引:5,自引:0,他引:5
Andrea?FrillingEmail author Jun?Li Frank?Weber Nils?Roman?Frühauf Jennifer?Engel Susanne?Beckebaum Andreas?Paul Thomas?Z?pf Massimo?Malago Christoph?Erich?Broelsch 《Journal of gastrointestinal surgery》2004,8(6):679-685
Bile duct injury is a severe and potentially life-threatening complication of laparoscopic cholecystectomy. Several series
have described a 0.5% to 1.4% incidence of bile duct injuries during laparoscopic cholecystectomy. The aim of this study was
to report on an institutional experience with the management of complex bile duct injuries and outcome after surgical repair.
Data were collected prospectively from 40 patients with bile duct injuries referred for surgical treatment to our center between
April {dy1998} and December 2003. Prior to referral, 35 patients (87.5%) underwent attempts at surgical reconstruction at
the primary hospital. In77.5%of the patients, complex typeE1or typeE2BDIwas found. Concomitant with bile duct injury, seven
patients had vascular injuries. Roux-en-Y hepaticojejunostomy was carried out in 33 patients. In two patients, Roux-en-Y hepaticojejunostomy
and vascular reconstruction were necessary. Five patients, one with primary nondiagnosed Klatskin tumor, required right hepatectomy.
Two patients, both with bile duct injuries and vascular damage, died postoperatively. Because of progressive liver insufficiency,
one of them was listed for high-urgency liver transplantation but died prior to intervention. At the median follow-up of 589
days, 82.5% of the patients are in excellent general condition. Seven patients have signs of chronic cholangitis. Major bile
duct injuries remain a significant cause of morbidity and even death after laparoscopic cholecystectomy. Because they present
a considerable surgical challenge, early referral to an experienced hepatobiliary center is recommended. 相似文献
109.
Evaluation of the possibility to assess bone age on the basis of DXA derived hand scans—preliminary results 总被引:2,自引:0,他引:2
Pawe??P?udowski Micha??Lebiedowski Roman?S.?LorencEmail author 《Osteoporosis international》2004,15(4):317-322
The classical method of skeletal age assessment is based on the recognition of changes in the radiographic appearance of the maturity indicators in hand-wrist radiographs by comparison with a reference atlas. The purpose of this study was the evaluation of the possibility to assess bone age using a less invasive method such as dual-energy X-ray absorptiometry (DXA). Bone ages of 50 children free of any chronic diseases (5–18 years old) and ten with multihormonal pituitary deficiency (MPD) (8–20 years old) were assessed using an Expert-XL densitometer. Hand scans and classical hand-wrist radiographs were evaluated by two independent observers for bone age by visual comparison with reference standards of skeletal development published in the atlas. The precision errors of duplicate bone age ratings were low both for radiographs (<1%) and DXA hand scans (<0.9%). A high degree of agreement between bone age ratings done by two observers was assessed by intraclass correlation coefficients. The same bone age based on radiographs and DXA hand scans was assessed in 44 of 60 cases (73.3%); in 16 cases the differences between bone age were no higher than 0.5 year. No significant difference between mean bone age based on radiographs and DXA hand scans was observed (P>0.05). Moreover, there was a very strong correlation between bone age results (r=0.998; r
2=0.996; P<0.0001), indicating agreement of bone age assessments based on DXA and radiographic images. Remarkable differences (up to 3 years) between bone age and chronological age were observed in healthy subjects, probably reflecting the effect of the secular trend towards earlier maturation or alterations in pubertal development. The study indicates that evaluation of skeletal maturity using DXA images is less invasive (up to 8 µSv) than radiography, giving results comparable to the classical method. 相似文献
110.
Coronary artery aneurysm and type-A aortic dissection demonstrated by retrospectively ECG-gated multislice spiral CT 总被引:3,自引:0,他引:3
The case of a 40-year-old male patient with a coronary aneurysm of the proximal left descending artery (LAD) combined with circumferential type-A dissection of the ascending aorta is reported. Computed tomography angiography of the coronary arteries was performed using multislice spiral computed tomography (MSCT) with retrospective ECG gating. Anatomical relations of the LAD aneurysm as well as the origin of the left coronary artery from the false lumen of the dissection were well depicted for planning of the surgical intervention using this new noninvasive imaging modality. 相似文献