全文获取类型
收费全文 | 10331篇 |
免费 | 383篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 351篇 |
儿科学 | 314篇 |
妇产科学 | 463篇 |
基础医学 | 728篇 |
口腔科学 | 252篇 |
临床医学 | 768篇 |
内科学 | 1929篇 |
皮肤病学 | 356篇 |
神经病学 | 485篇 |
特种医学 | 655篇 |
外科学 | 2545篇 |
综合类 | 69篇 |
一般理论 | 6篇 |
预防医学 | 589篇 |
眼科学 | 297篇 |
药学 | 348篇 |
中国医学 | 1篇 |
肿瘤学 | 576篇 |
出版年
2023年 | 37篇 |
2022年 | 37篇 |
2021年 | 84篇 |
2020年 | 53篇 |
2019年 | 78篇 |
2018年 | 84篇 |
2017年 | 73篇 |
2016年 | 100篇 |
2015年 | 585篇 |
2014年 | 662篇 |
2013年 | 689篇 |
2012年 | 779篇 |
2011年 | 752篇 |
2010年 | 688篇 |
2009年 | 623篇 |
2008年 | 742篇 |
2007年 | 679篇 |
2006年 | 625篇 |
2005年 | 565篇 |
2004年 | 410篇 |
2003年 | 221篇 |
2002年 | 139篇 |
2001年 | 114篇 |
2000年 | 112篇 |
1999年 | 116篇 |
1998年 | 73篇 |
1997年 | 84篇 |
1996年 | 62篇 |
1995年 | 51篇 |
1994年 | 44篇 |
1993年 | 53篇 |
1992年 | 68篇 |
1991年 | 79篇 |
1990年 | 70篇 |
1989年 | 67篇 |
1988年 | 67篇 |
1987年 | 56篇 |
1986年 | 67篇 |
1985年 | 62篇 |
1984年 | 60篇 |
1983年 | 75篇 |
1982年 | 48篇 |
1981年 | 55篇 |
1980年 | 40篇 |
1979年 | 44篇 |
1977年 | 35篇 |
1976年 | 43篇 |
1975年 | 35篇 |
1972年 | 33篇 |
1971年 | 34篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
Dr. K. Hekmat Dr. A. Kröner Dr. H. Stützer Prof. Dr. R. H. G. Schwinger PD Dr. S. Kampe Prof. Dr. G. B. W. E. Bennink Prof. Dr. U. Mehlhorn 《Zeitschrift für Herz-, Thorax- und Gef??chirurgie》2004,18(6):257-267
Zusammenfassung
Einleitung:
Das Ziel dieser Studie war die Entwicklung eines spezifischen Schweregradklassifizierungssystems für die Beurteilung und Vorhersage von Organfunktionsstörungen und Überleben bei herzchirurgischen Intensivpatienten.
Methoden:
Hierzu wurden konsekutiv alle erwachsenen Patienten nach einem herzchirurgischen Eingriff unter Einsatz der Herzlungenmaschine über einen Zeitraum von 3 Jahren in die Studie aufgenommen. Im Konstruktionsset erfolgte die Auswahl der Variablen mit Hilfe der Patienten, die mindestens 24 Stunden auf der Intensivstation verbrachten. Die Ergebnisse wurden dann in zwei Validierungssets mit allen Intensivpatienten überprüft. Die Qualität des Scores wurde mit dem Hosmer-Lemeshow-Test (HL) sowie der ROC-Analyse beurteilt, und mit dem APACHE-II- und dem MODS-Score verglichen.
Ergebnisse:
Insgesamt wurden 3230 Patienten über einen Zeitraum von 3 Jahren auf unserer Intensivstation aufgenommen. Die HL-Werte für den neuen Score waren 5,8 (APACHE-II: 11,3; MODS: 9,7) für das Konstruktionsset, 7,2 (APACHE-II: 8,0; MODS: 4,5) für das Validierungsset I und 5,9 für das Validierungsset II. Die Fläche unter der ROC-Kurve war 0,91 (APACHE-II: 0,86; MODS: 0,84) für den neuen Score im Konstruktionsset, 0,88 (APACHE-II: 0,84; MODS: 0,84) in dem Validierungsset I, und 0,92 in dem Validierungsset II.
Schlussfolgerung:
Der neue CASUS (Cardiac Surgery Score) zeigt für herzchirurgische Intensivpatienten eine exzellente Kalibrierung und Diskriminierung bezüglich der 30-Tage-Letalität. Die Variablen des CASUS sind einfach, reproduzierbar und werden routinemäßig in herzchirurgischen Intensivstationen erfasst. Der CASUS könnte als Expertensystem für das Diagnostizieren von Organfunktionsstörungen, der Entscheidungsfindung, der Ressourcenauswertung und Vorhersage der Letalität für herzchirurgische Intensivpatienten dienen. 相似文献
22.
23.
PD Dr. M. Frosch 《Monatsschrift für Kinderheilkunde》2006,154(9):880-885
Wegener’s granulomatosis (WG) is a necrotising granulomatous small vessel vasculitis with a clinical predilection for the involvement of the upper airways, lungs and kidneys. It occurs at all ages. The pathogenesis of WG is determined by the pathological activation of phagocytes during transmigration through the vessel. Whereas most aspects of WG are similar at all ages, some features appear to be significantly different. WG in childhood is more frequently complicated by subglottic stenosis and nasal deformity, while treatment related morbidity is less common compared to adults. The introduction of combined treatment with cyclophosphamide and glucocorticoids has resulted in a dramatic improvement in patient outcome; however, commonly occurring disease relapses and the risk of chronic organ damage at all ages make long-term follow-up of all patients necessary. 相似文献
24.
25.
PD Dr. C. Hierholzer S. Hungerer R. Beickert V. Bühren 《Trauma und Berufskrankheit》2006,8(3):157-162
The standard surgical protocol presented, with resection of the bone that has not healed. stable osteosynthesis with locking plates, and autologous bone graft augmentation, is an established and successful method of treating atrophic nonunion of the distal humerus. Bone healing was observed in all patients, and a single surgical operation was sufficient. In addition, elbow joint arthrolysis was performed to resect joint fibrosis and ossification and release tissue contractures. With this combined approach bony healing and improvement in range of motion and function of the elbow joint were achieved. 相似文献
26.
Definitive therapy for hyperhidrosis is sympathectomy. The authors have used a posterior approach to perform 36 dorsal sympathectomies for upper extremity hyperhidrosis in 18 patients (12 female, 6 male). All 18 patients suffered from excessive sweating of the upper extremity (17 palmar, 1 axillary) that caused significant psychological and occupational problems. Eleven patients (61.1%) had lower extremity involvement as well. For all 18 patients conservative medical treatment had failed. Bilateral operations were performed, via a posterior extrapleural approach, through the bed of the third rib. All 36 limbs were relieved of excess sweating. There were no deaths and only two minor wound complications. In no patient did Horner's syndrome develop. Long-term follow-up did not reveal any recurrence of hyperhidrosis. Two patients did complain of compensatory hyperhidrosis of the lower extremities. Dorsal sympathectomy was effective in all of the patients with upper extremity hyperhidrosis in this series. The posterior approach is technically simple, allows simultaneous bilateral operations, and is associated with only infrequent minor complications. 相似文献
27.
Adrenal incidentalomas are clinically inapparent masses detected incidentally with imaging studies conducted for other reasons. They are relatively common and require structured diagnostic workup. In many cases surveillance is warranted. The diagnostic workflow has to reveal whether the mass is hormonally functioning and/or if there is evidence of malignancy. If the tumor is functionally silent and not larger than 4 cm, surveillance is warranted. Functioning tumors and masses larger than 6 cm have to be resected. Fine-needle aspiration biopsy is indicated in very rare cases, but pheochromocytoma has to be ruled out first. 相似文献
28.
29.
Kazumasa Fujitani Jaffer A. Ajani Christopher H. Crane Barry W. Feig Peter W. Pisters Nora Janjan Garrett L. Walsh Stephen G. Swisher Ara A. Vaporciyan David Rice Angela Welch Jackie Baker Josephine Faust Paul F. Mansfield MD 《Annals of surgical oncology》2007,14(4):1305-1311
Background Significant tumor downstaging has been achieved in patients with localized gastric or gastroesophageal adenocarcinoma by induction
chemotherapy and preoperative chemoradiotherapy (CTX–CTXRT). However, the influence of CTX–CTXRT on operative morbidity and
mortality has not yet been clarified. The aim of the present study was to document the frequency and nature of morbidity and
mortality after surgery combined with CTX–CTXRT, and identify factors predictive of postoperative complications in patients
with localized gastric or gastroesophageal adenocarcinoma.
Methods A prospectively collected database on 71 consecutive patients who underwent CTX–CTXRT at M.D. Anderson Cancer Center between
January 1997 and August 2004 was reviewed. Postoperative morbidity and mortality were investigated, and risk factors for overall
complications were identified by multivariate logistic regression analysis.
Results Overall morbidity and mortality rates were 38.0% (27 patients) and 2.8% (2 patients), respectively. Age greater than 60 years
[relative risk 11.3 (95% confidence interval 2.50–50.6)] and body mass index (BMI) of 26 kg/m2 or above [relative risk 4.08 (95% confidence interval 1.08–15.4)] were significant risk factors for overall complications.
Conclusions CTX–CTXRT can be performed safely with an acceptable operative morbidity and a low operative mortality rate in patients with
gastric or gastroesophageal cancer, with careful consideration of added risk associated with age and obesity. 相似文献
30.