全文获取类型
收费全文 | 37508篇 |
免费 | 2995篇 |
国内免费 | 1331篇 |
专业分类
耳鼻咽喉 | 1186篇 |
儿科学 | 742篇 |
妇产科学 | 786篇 |
基础医学 | 1656篇 |
口腔科学 | 1589篇 |
临床医学 | 3411篇 |
内科学 | 4528篇 |
皮肤病学 | 315篇 |
神经病学 | 937篇 |
特种医学 | 957篇 |
外国民族医学 | 16篇 |
外科学 | 13282篇 |
综合类 | 5651篇 |
现状与发展 | 5篇 |
预防医学 | 1459篇 |
眼科学 | 1135篇 |
药学 | 1580篇 |
68篇 | |
中国医学 | 331篇 |
肿瘤学 | 2200篇 |
出版年
2024年 | 387篇 |
2023年 | 921篇 |
2022年 | 1447篇 |
2021年 | 1883篇 |
2020年 | 2005篇 |
2019年 | 1729篇 |
2018年 | 1643篇 |
2017年 | 1512篇 |
2016年 | 1597篇 |
2015年 | 1506篇 |
2014年 | 2858篇 |
2013年 | 2646篇 |
2012年 | 2222篇 |
2011年 | 2616篇 |
2010年 | 2193篇 |
2009年 | 2005篇 |
2008年 | 1895篇 |
2007年 | 1841篇 |
2006年 | 1563篇 |
2005年 | 1429篇 |
2004年 | 1079篇 |
2003年 | 901篇 |
2002年 | 767篇 |
2001年 | 575篇 |
2000年 | 411篇 |
1999年 | 311篇 |
1998年 | 291篇 |
1997年 | 248篇 |
1996年 | 186篇 |
1995年 | 179篇 |
1994年 | 138篇 |
1993年 | 98篇 |
1992年 | 106篇 |
1991年 | 79篇 |
1990年 | 57篇 |
1989年 | 59篇 |
1988年 | 61篇 |
1987年 | 47篇 |
1986年 | 39篇 |
1985年 | 57篇 |
1984年 | 50篇 |
1983年 | 35篇 |
1982年 | 56篇 |
1981年 | 33篇 |
1980年 | 20篇 |
1979年 | 18篇 |
1978年 | 10篇 |
1977年 | 9篇 |
1976年 | 5篇 |
1973年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
P Morice S Camatte A Rey D Atallah C Lhommé P Pautier C Pomel J-F Coté C Haie-Meder P Duvillard D Castaigne 《Annals of oncology》2003,14(4):592-598
BACKGROUND: The aim of this study was to determine the prognostic factors for patients with advanced stage, low malignant potential ovarian tumour (LMPOT). PATIENTS AND METHODS: A retrospective review of 80 patients with serous LMPOT and peritoneal implants treated at or referred to our institution was carried out. RESULTS: Sixty-five patients had non-invasive implants. Fifteen patients had invasive implants. Twenty-nine patients had stage II and 51 patients had stage III disease. Three patients died of evolutive invasive disease and four of complications of treatment. The only prognostic factor of progression to 'evolutive invasive disease' is the pathologic subtype of peritoneal implants. The 5-year rates of evolutive invasive disease in patients with non-invasive implants and invasive implants were 2% and 31%, respectively (P <0.002). CONCLUSIONS: In this series, the only prognostic factor for patients with advanced stage borderline tumour is the type of peritoneal implant. More patients died of the treatment's complications than of the disease itself. The patients' prognosis with non-invasive implants seems to be excellent, and conservative management could be discussed in younger patients. 相似文献
83.
本文采用四种不同的介入治疗方法堵闭动脉导管共127例,成功率海绵塞法为92%(23/25例),双面伞器法为98.6%(66/67例),钮扣式补片法为100%(26/26例),弹簧圈器法为100%(9/9例)。海绵塞法和弹簧圈器无残余分流;术后6个月双面伞器法残余分流为7%(5/67例),钮扣式补片法为15%(4/26例)。钮扣式补片法和弹簧圈器法无并发症,海绵塞法为24%(6/25例),双面伞器法为4%(3/67例)。我们认为,钮扣式补片法及弹簧圈器法在小儿动脉导管未闭的介入治疗中具有较大的应用价值。 相似文献
84.
E. Bruckheimer Z.R. Bulbul J.C. Love C.S. Kleinman W.E. Hellenbrand 《Pediatric cardiology》1998,19(5):428-430
Three patients with patent ductus arteriosus and moderate aortic stenosis had a marked reduction in aortic valve gradient
following transcatheter ductal occlusion. The hemodynamic effects of an aortopulmonary shunt on the severity of left ventricular
outflow obstruction and the implications on intervention are discussed. 相似文献
85.
Tiziano Maggino M.D. Cesare Romagnolo M.D. Fabio Landoni M.D. Enrico Sartori M.D. Paolo Zola M.D. Angiolo Gadducci M.D. 《Gynecologic oncology》1998,68(3):274-279
Objective.The aim of this study was to define the clinical–therapeutical approach to endometrial cancer now being followed in some of the most important centers of reference for gynecological cancer in North America by means of a questionnaire.Study design.The questionnaire focused on four principal areas: (1) surgical staging and therapy; (2) adjuvant treatment; (3) treatment modifications; and (4) management of advanced stages (FIGO III–IV).Results.There were 48 evaluable responses (77%) received by the end of December 1994 which were considered for this analysis. Lymphadenectomy is utilized routinely in 26/48 centers (54.2%) and in selective clinical–pathological conditions in another 21/48 centers (43.5%). In the majority of centers (31/48; 64.6%) radical surgery is utilized for selected indications such as cervical involvement. Only 3/48 (6.2%) centers consider the vaginal approach totally inappropriate. The great majority (40/48; 83.3%) of the centers considered postsurgical adjuvant therapy to be necessary in FIGO Stage Ic. Brachytherapy is routinely performed in 3 centers (6.2%) in postsurgical management of Stage I endometrial cancer, while the majority of the centers (31/48; 64.6%) perform brachytherapy of the vaginal vault in certain clinical–pathological conditions. A wide variety of treatments are used for advanced stages (FIGO III–IV).Conclusions.It emerges that some controversial aspects exist on endometrial cancer treatment, and these conflicting data need a large-scale multicenter randomized clinical trial. 相似文献
86.
Non-typhoid Salmonella gastroenteritis 总被引:2,自引:0,他引:2
87.
Era-Noël Garabedian Vincent Ducroz Gilles Roger Franoise Denoyelle 《The Laryngoscope》1998,108(6):899-902
Objective: To present the preliminary results of a new surgical procedure for posterior laryngeal cleft repair. Design: Retrospective study in an academic tertiary care center. Method: The study included three male patients (age at surgery, 2, 13, and 14 mo). One presented with severe aspiration and cyanotic attacks, the two others with aspiration and recurrent chest infections. The types of laryngeal clefts included complete cleft of the cricoid with varying degrees of tracheal involvement but not further than the first six tracheal rings. Associated malformations included one VATER syndrome, one esophageal atresia, and one tracheoesophageal fistula. Surgery was performed under general anesthesia with nasotracheaI intubation. A vertical anterior laryngofissure was performed. The mucosal margins of the clefts were incised and then repaired in two layers with polyglactin sutures. The original feature of this procedure was the interposition of a small piece of tibial periosteum between the two layers. This fascia graft is known to be strong and resistant in cleft palate surgery. Main Outcome Measure: Clinical and endoscopic follow-up was used for evaluation of results. Results: The three patients had successful laryngeal repair at a mean follow-up of 6 months (range, 4-14 mo). Conclusion: The anterior laryngofissure provides a good surgical access to the cleft. The interposition of tibial periosteum allows durability of the cleft repair. A longer follow-up is needed to confirm these preliminary results. A computed tomography scan study and a study on the rabbit are planned in order to evaluate the outcome of these periosteal grafts. 相似文献
88.
Michio Maeta Hiroaki Saito Akira Kondo Hiroshi Yamashiro Syunichi Tsujitani Masahide Ikeguchi Nobuaki Kaibara 《Gastric cancer》1998,1(1):57-63
Background.
In Japan, much attention has recently been paid to super-extended paraaortic lymphadenectomy (PAL) for the treatment of advanced
gastric cancer. However, it has been reported that PAL is associated with increased morbidity and mortality, as compared to
conventional extended lymphadenectomy (D2 or D3). Therefore, an analysis of the effects of PAL on perioperative changes in
the biological responses of patients essential for determining the potential utility of this procedure.
Methods.
The current non-randomized prospective study included evaluations of perioperative changes in parameters of surgical stress
(series I; serum levels of antidiuretic hormone, interleukin-6, trypsin, and phospholipase A
2
) and immunocompetence (series II; phytohemagglutinin- and concanavalin A-induced blastogenesis, activity of natural killer
cells and the ratio of CD4 cells to CD8 cells) in patients with advanced gastric cancer (T3 or T4), comparing groups treated
with D3 plus PAL (
n
= 12) and D3 (
n
= 13), and a control group with early gastric cancer (
n
= 16) treated with D1 lymphadenectomy (perigastric N1 nodes) between April 1995 and April 1997.
Results.
The duration of surgery and the amount of blood lost were longer and greater in the D3 plus PAL group than in the D3 and D1
groups. D3 plus PAL and D3 were associated with significant postoperative increases in parameters of surgical stress, as well
as with significant postoperative immunosuppression, compared to results with D1. However, there were no significant differences
in the respective parameters between the D3 plus PAL and D3 groups.
Conclusions.
Our results indicate that there are no essential differences in patients' biological responses between D3 plus PAL and D3
lymphadenectomy. It appears that PAL-associated morbidity can be minimized by very careful manipulation during the dissection
of paraaortic lymph nodes.
Received for publication on Feb. 10, 1998; accepted on Jun. 3, 1998 相似文献
89.
影响吻合器痔上黏膜环切术疗效的因素及改进方法 总被引:5,自引:1,他引:5
目的探讨影响吻合器痔上黏膜环切术(PPH)疗效的因素及改进方法。方法使用美国强生一次性PPH吻合器或国产PPH吻合器对68例痔病患者进行PPH手术,在手术改进前后分别对每例黏膜环切的标本以及症状的改善进行测量及观察。结果方法改进前,标本宽度为0.5~2.6cm,术后痔核回缩率75%;方法改进后,标本宽度为3.0~3.5cm,术后痔核回缩率100%。结论影响PPH手术疗效的因素主要是肛垫的提升复位与肛垫的固定。通过改进方法克服不利因素,使环切黏膜的宽度达到要求,进而使肛垫提升复位并得以固定,痔核回缩效果满意。 相似文献
90.
BACKGROUND: The study was aimed to evaluate the analgesic efficacy, postoperative comfort, recovery characteristics and side effects of three different analgesic agents administered prophylactically. METHODS: Eighty patients undergoing day-case minor operative laparoscopy were randomly allocated into four groups to receive tenoxicam 20 mg i.v. (Group T), fentanyl 100 microg i.v. (Group F), 5 ml of bupivacaine 2.5 mg/ml for infiltration of trocar sites (Group B), 30, 10 and 5 min before incision respectively. Bupivacaine, 35 ml, 2.5 mg/ml was also administered into the pelvic cavity in Group B. Group P received only placebo. Postoperative pain, analgesic requirements, first response to verbal stimulus, first analgesic requirement, ability to walk without help, to drink and to void, blood pressures, SpO2 and respiration rates were recorded in the PACU. Postoperative pain was evaluated by verbal rating scale. Pain scores, analgesic requirements and side effects were evaluated by telephone calls until the 48th postoperative hour. RESULTS: Postoperative pain scores were lower and time to requirement of rescue analgesics was longer in groups F and B compared to Group P. In the PACU, analgesic requirements were lower in Group B, compared to Group P. Nausea and vomiting were increased in Group F. CONCLUSION: Tenoxicam 20 mg i.v. was found to be ineffective whereas bupivacaine was superior to other groups in reducing pain and analgesic requirements. Bupivacaine also increased time to first analgesics and obtained better recovery characteristics, underlining its value in prophylactic pain management compared to the other two agents. 相似文献