全文获取类型
收费全文 | 48374篇 |
免费 | 2327篇 |
国内免费 | 603篇 |
专业分类
耳鼻咽喉 | 134篇 |
儿科学 | 807篇 |
妇产科学 | 256篇 |
基础医学 | 2423篇 |
口腔科学 | 172篇 |
临床医学 | 2735篇 |
内科学 | 7705篇 |
皮肤病学 | 134篇 |
神经病学 | 504篇 |
特种医学 | 1395篇 |
外国民族医学 | 23篇 |
外科学 | 23273篇 |
综合类 | 2828篇 |
现状与发展 | 2篇 |
预防医学 | 624篇 |
眼科学 | 66篇 |
药学 | 1036篇 |
23篇 | |
中国医学 | 63篇 |
肿瘤学 | 7101篇 |
出版年
2023年 | 1678篇 |
2022年 | 2780篇 |
2021年 | 3157篇 |
2020年 | 2616篇 |
2019年 | 1718篇 |
2018年 | 1504篇 |
2017年 | 1305篇 |
2016年 | 1244篇 |
2015年 | 1516篇 |
2014年 | 3234篇 |
2013年 | 2719篇 |
2012年 | 2560篇 |
2011年 | 2636篇 |
2010年 | 2320篇 |
2009年 | 2191篇 |
2008年 | 1826篇 |
2007年 | 1903篇 |
2006年 | 1759篇 |
2005年 | 1522篇 |
2004年 | 1300篇 |
2003年 | 1190篇 |
2002年 | 1123篇 |
2001年 | 1005篇 |
2000年 | 893篇 |
1999年 | 879篇 |
1998年 | 436篇 |
1997年 | 289篇 |
1996年 | 255篇 |
1995年 | 212篇 |
1994年 | 185篇 |
1993年 | 166篇 |
1992年 | 421篇 |
1991年 | 430篇 |
1990年 | 437篇 |
1989年 | 330篇 |
1988年 | 269篇 |
1987年 | 156篇 |
1986年 | 69篇 |
1985年 | 95篇 |
1984年 | 91篇 |
1983年 | 48篇 |
1982年 | 75篇 |
1981年 | 63篇 |
1980年 | 63篇 |
1979年 | 51篇 |
1978年 | 76篇 |
1977年 | 51篇 |
1976年 | 62篇 |
1975年 | 44篇 |
1973年 | 70篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
201.
Zusammenfassung GRUNDLAGEN: Das Ziel dieser Untersuchung war, die Machbarkeit und Wirksamkeit der Fokus-Sanierung via Mini-Thorakotomie zur Therapie einer kavernösen Lungentuberkulose zu prüfen. METHODIK: Der Mini-Thorakotomie-Zugang wurde in 18 Patienten angewendet (Alter, 25–75 Jahre; median, 47,5 Jahre). Die Patienten hatten eine kavernöse Lungentuberkulose oder ein Lungentuberkulom nach tuberkulostatischer Therapie oder waren Patienten, die auf diese Therapie nicht angesprochen haben. 8 Patienten mit chronischer kavernöser Lungentuberkulose und 10 Patienten mit Tuberkulom haben sich der Fokus-Sanierung, Spülung und Faltnaht unterzogen. ERGEBNISSE: Es gab keine operative Mortalität. Alle Patienten waren klinisch saniert, hatten keinen Nachweis für Bakterien im Sputum, im Röntgen hatten die Lungenschatten abgenommen. Die Dauer der Operation betrug 30–120 min (median, 75 min), der intraoperative Blutverlust war 100–200 ml (median, 153 ml). Der postoperative Spitalsaufenthalt betrug 21–42 Tage (median, 30 Tage). Das Follow-up nach 1–4 Jahren (median, 2,5 Jahre) zeigte keine Komplikation und kein Rezidiv der Grunderkrankung. SCHLUSSFOLGERUNGEN: MTFC ist eine sichere und technisch machbare Methode zur Therapie der Lungentuberkulose oder des Tuberkuloms bei Schonung der Lungenfunktion. 相似文献
202.
G L Hines Y Mishriki L Williams K Monroe N Metwally 《The Journal of cardiovascular surgery》1991,32(4):485-490
This study attempted to evaluate the efficacy of chronic extra-aortic counterpulsation with a latissimus dorsi neuro vascular flap. Five dogs had a preliminary procedure consisting of the creation of a latissimus dorsi flap and a thoracotomy in which the flap was wrapped around the descending aorta just distal to the left subclavian artery. An epicardial lead was placed on the left ventricle and a nerve stimulating lead placed around the thoraco-dorsal nerve. Three weeks later, both leads were connected to a cardiomyostimulator programmed to function in a counterpulsation mode with a 1:2 assist frequency. Hemodynamic measurements were made at 6 and 8 and 10 and 12 weeks and the dogs were sacrificed. Three dogs had all sets of hemodynamic measurements made. Two of the three dogs demonstrated diastolic augmentation at 6 and 8 and 10 and 12 weeks average 20 to 25 mmHg. The third dog failed to demonstrate any change. All dogs were sacrificed at 12 weeks and specimens were submitted for histologic evaluation. The muscle flap was preserved in all animals. The aorta subjacent to the flap showed, (1) normal intima with no evidence of disruption or thrombus in all animals, (2) in the animals in whom counterpulsation was observed, there appeared to be thinning of the media in the aorta subjacent to the muscle flap, and (3) no evidence of distal emboli. This study demonstrated that chronic counterpulsation can be obtained with a latissimus dorsi flap. The actual hemodynamic benefits are not determined from this study. The medial thinning in the aortic wall may limit the long-term benefit of this procedure. 相似文献
203.
204.
Mine G. Güllüoğlu Zeki Kılıçaslan Alper Toker Göksel Kalaycı Dilek Yılmazbayhan 《Langenbeck's archives of surgery / Deutsche Gesellschaft fur Chirurgie》2006,391(3):222-227
Background and aims The aim of this study was to assess the diagnostic value of image guided percutaneous fine needle aspiration (FNA) biopsy in equivocal mediastinal masses.Patients Sixty-six patients with an equivocal mediastinal mass who underwent FNA biopsy between 1993 and 2003 were eligible for final analysis. The cytological and definitive diagnosis of masses were grouped as primary 22 (33%)−30 (46%) and secondary (metastatic) neoplasms 18 (27%)−18 (27%) and nonneoplastic lesions 20 (30%)−18 (%27) respectively.Results The diagnostic accuracy (%95 C.I.) of FNA biopsy for primary mediastinal neoplasms, secondary neoplasms and nonneoplastic lesions were found to be 93.3 (83.8–98.2)%, 100 (95.1–100)%, 93.3 (83.8–98.2)%, respectively.Conclusion Image guided percutaneous FNA biopsy is a safe and highly accurate diagnostic method for equivocal mediastinal masses. 相似文献
205.
《European journal of vascular and endovascular surgery》2006,31(2):226
A 51-year-old man with abdominal aortic aneurysm was treated endovascular placement of stent-grafts fabricated from expanded polytetrafluoroethylene and Z-stents. Exclusion of the aneurysm was achieved at the end of the procedure. However, a stent-graft infection developed two months after the procedure. We performed a surgical excision of the aneurysm with stent-grafts and an extra-anatomical reconstruction. The patient is alive and well after 4 years with no signs of infection. The preop angiography shows all features of a false aneurysm and the cultures at the open procedure revealed Salmonella. We must assume that the stent-graft has been implanted in a primarily mycotic aneurysm, even if there were no signs of infection initially. 相似文献
206.
Yuji Maruyama Shigeo Yamauchi Hidetsugu Ogasawara Hajime Imura Masami Ochi Kazuo Shimizu 《Annals of thoracic and cardiovascular surgery》2006,12(1):60-62
Surgical treatment for subacute pulmonary arterial thromboembolism has previously been considered to be inappropriate. We undertook a pulmonary arterial thrombectomy and removal of a floating right heart thrombus in a patient who had been symptomatic for over a month. The pulmonary arterial pressure, which had been equal to the systemic pressure preoperatively, decreased gradually and almost normalized one month postoperatively. Pulmonary perfusion scintigraphy revealed a dramatic improvement and the patient returned to normal life activities. 相似文献
207.
Fengshi Chen Toru Bando Nobuharu Hanaoka Tatsuo Fukuse Seiki Hasegawa Hiromi Wada 《The Japanese Journal of Thoracic and Cardiovascular Surgery》2005,53(10):562-564
Ganciclovir resistance in cytomegalovirus (CMV) is an increasing problem in lung-transplant recipients with adverse clinical outcomes. We experienced the successful treatment of ganciclovir-resistant CMV infection in a lung-transplant recipient still receiving CMV prophylaxis. A 24-year-old woman with lymphangioleiomyomatosis underwent a living-donor lobar lung transplantation. She was a primary CMV mismatch (D+/R-) patient. She recovered from her postoperative complications, and was about to be discharged. However, she suffered ganciclovir-resistant CMV infection during prophylactic therapy. She was successfully treated with foscarnet, and is now alive without recurrence 18 months after surgery. 相似文献
208.
Yuji Takeda Naoki Minato Yuji Katayama Tomoki Shimokawa 《General thoracic and cardiovascular surgery》2005,53(1):42-45
Two successful cases of the surgical treatment for coronary artery aneurysm (non-Kawasaki disease) were reported. The first
case had a saccular aneurysm on the left circumflex coronary artery (LCx) #14. Resection of the LCx aneurysm was performed
subsequent to single vessel coronary artery bypass grafting (CABG) to the distal portion of LCx#14 under the cardioplegic
cardiac arrest. The second case had aneurysms on both the left anterior descending artery (LAD) #7 (fusiform) and the LCx#11
(saccular). After double vessel CABG to LAD#7 and LCx#11, ligation or resection of two aneurysms was performed successfully.
Postoperative courses have been uneventful with good angiographic results achieved. Since these surgical procedures demonstrated
safety, the patients are expected to achieve a good long-term prognosis. 相似文献
209.
Long-term results of above knee femoro-popliteal bypass depend on indication for surgery and graft-material. 总被引:3,自引:0,他引:3
J Berglund M Bj?rck J Elfstr?m 《European journal of vascular and endovascular surgery》2005,29(4):412-418
OBJECTIVE To determine the long-term results of above-knee femoro-popliteal bypass with autologous saphenous vein (SV) or expanded polytetrafluoroethylene (ePTFE) in routine surgical practice. METHODS: Data from the Swedish vascular registry, Swedvasc, was reviewed retrospectively. Patients with bypass surgery in 1996 and 1997 were assessed 5-7 years later. Data were gathered from the case-records and from clinical follow-up. The composite endpoint of graft failure included death within 30 days, occlusion, major amputation, extension of the graft to below-knee position and removal of an infected graft. Kaplan-Meier curves and Cox' proportional hazard ratios were calculated. RESULTS: Four hundred and ninety-nine patients undergoing bypass for critical limb ischemia (CLI) (56%) or claudication (44%), SV (28%) or ePTFE (72%), were included. There were no significant differences in patient characteristics between patients with SV or ePTFE. CLI and ePTFE were risk factors for graft failure. For patients with both claudication and CLI SV grafts yielded better long-term results than ePTFE grafts ( p <0.03) and ( p <0.003), respectively. Symptom aggravation after graft occlusion was almost exclusively restricted to ePTFE grafts. CONCLUSIONS: Femoro-popliteal bypass above-knee with SV gives good long-term results, especially for claudication. ePTFE grafts cannot be recommended in claudicants, since occlusion occurs often and frequently leads to CLI. 相似文献
210.
Background - A case of primary thyroid T cell lymphoma leading to lethal tracheal perforation during chemotherapy is described. 相似文献