全文获取类型
收费全文 | 3827篇 |
免费 | 299篇 |
国内免费 | 69篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 129篇 |
妇产科学 | 109篇 |
基础医学 | 415篇 |
口腔科学 | 41篇 |
临床医学 | 669篇 |
内科学 | 699篇 |
皮肤病学 | 47篇 |
神经病学 | 257篇 |
特种医学 | 202篇 |
外科学 | 548篇 |
综合类 | 100篇 |
一般理论 | 13篇 |
预防医学 | 396篇 |
眼科学 | 106篇 |
药学 | 287篇 |
中国医学 | 3篇 |
肿瘤学 | 152篇 |
出版年
2022年 | 31篇 |
2021年 | 74篇 |
2020年 | 44篇 |
2019年 | 72篇 |
2018年 | 58篇 |
2017年 | 55篇 |
2016年 | 63篇 |
2015年 | 75篇 |
2014年 | 87篇 |
2013年 | 139篇 |
2012年 | 154篇 |
2011年 | 193篇 |
2010年 | 112篇 |
2009年 | 104篇 |
2008年 | 160篇 |
2007年 | 220篇 |
2006年 | 179篇 |
2005年 | 214篇 |
2004年 | 142篇 |
2003年 | 155篇 |
2002年 | 125篇 |
2001年 | 109篇 |
2000年 | 109篇 |
1999年 | 108篇 |
1998年 | 59篇 |
1997年 | 76篇 |
1996年 | 52篇 |
1995年 | 51篇 |
1994年 | 46篇 |
1993年 | 56篇 |
1992年 | 86篇 |
1991年 | 80篇 |
1990年 | 79篇 |
1989年 | 92篇 |
1988年 | 72篇 |
1987年 | 64篇 |
1986年 | 45篇 |
1985年 | 60篇 |
1984年 | 40篇 |
1983年 | 36篇 |
1981年 | 21篇 |
1980年 | 30篇 |
1979年 | 35篇 |
1978年 | 26篇 |
1977年 | 22篇 |
1976年 | 25篇 |
1975年 | 21篇 |
1974年 | 25篇 |
1973年 | 25篇 |
1972年 | 23篇 |
排序方式: 共有4195条查询结果,搜索用时 0 毫秒
1.
The initial management of bladder outflow obstruction typically related to benign prostatic hyperplasia (BPH) falls to a large extent within the remit of general practice. Referral onwards to secondary care typically arises following the failure to respond to conservative measures or when complications have supervened; the most significant of which is urinary retention. In the hospital setting, anaesthesia, constipation and immobility are the common precipitants. What follows is a practical guide to the management of these situations and provides an overview of the conservative, medical, minimally invasive and surgical treatments available. 相似文献
2.
Heather R. Nolan Juan Gurria Jose L. Peiro Sammy Tabbah Ramiro Diaz-Primera William Polzin Mounira Habli Foong-Yen Lim 《Journal of pediatric surgery》2019,54(6):1153-1158
PurposeCongenital high airway obstruction syndrome (CHAOS) is a devastating fetal condition of complete airway discontinuity resulting in significant hydrops and extreme lung hyperplasia. It is universally fatal with survival reported only in the rare spontaneous fistulization or EXIT intervention (Ex Utero Intrapartum Treatment). Even in these cases, mortality remains high, and current investigations are targeting prenatal interventions. This report describes our experience with management and fetal interventions for CHAOS, including laser laryngotomy.MethodsWe retrospectively reviewed all patients diagnosed with CHAOS at a single academic institution between 2006 and 2017.ResultsFifteen patients were identified. Eight had obstruction at the trachea and seven at the larynx. In the laryngeal obstructions, three expired shortly after birth, and one survived after spontaneous fistulization and subsequent EXIT to tracheostomy. The remaining three underwent in-utero treatment with laser laryngotomy. One had preterm premature rupture of membranes (PPROM), delivered 3 days post-operatively, and died. Two underwent EXIT to tracheostomy with one surviving to discharge and is currently 2 years old.ConclusionOur study demonstrates the outcomes of a large series of patients diagnosed with CHAOS. While mortality remains high, options for fetal intervention are being explored to allow alterations in the prenatal natural history and improve postnatal outcomes.Type of StudyRetrospective Treatment Study.Level of EvidenceLevel IV. 相似文献
3.
4.
5.
6.
7.
Jonas T. Johnson David G. Mayernik Eugene N. Myers Teresa A. Nolan Victor L. Schramm Barbara S. Sigler Robin L. Wagner 《Head & neck》1987,9(6):336-340
Patients with locally advanced, inoperable squamous cell carcinoma of the head and neck were offered three courses of cisplatin and 96-h 5-fluorouracil (5-FU) infusion. Subsequent therapy included surgery when feasible, irradiation therapy, and a maintenance program of methotrexate (MTX)-5-FU. Thirty-three patients were evaluated prospectively. Seven patients underwent a single course of chemotherapy. Five patients underwent two courses of chemotherapy. Twenty-one patients underwent three courses of adjuvant chemotherapy. The overall response rate was 48% (16 of 33). Fifteen of 21 patients (76%) receiving three courses of chemotherapy evidenced a response; this included three complete responses (CRs) (9%). No responses were seen in patients receiving only one or two courses of chemotherapy. Among responding patients, the initial favorable response to chemotherapy was apparent after the first course of chemotherapy. Patients who failed to demonstrate any response after two courses of chemotherapy did not respond after a third course. A significant group of patients fail to respond and should be offered participation in other investigational protocols as they become available. 相似文献
8.
9.
S. S. Kerwar Susan C. Ridge M. Jane Landes Joseph C. Nolan Arnold L. Oronsky 《Inflammation research》1994,43(3-4):206-210
Rabbit inflamed synovial tissue grown in culture synthesizes a factor that induces collagenase synthesis in chondrocytes and in cartilage. Synthesis of this factor by the synovial tissue is inhibited by cycloheximide but not by indomethacin. The factor has an apparent molecular weight of 30,000, is stable to heat and to trypsin treatment but is inactivated by acid. Induction of collagenase synthesis in chondrocytes occurs after a lag period of 6 hours. 相似文献
10.
Auto-adjustable continuous positive airway pressure (APAP) devices are an emerging treatment alternative to fixed-pressure continuous positive airway pressure (CPAP) therapy for obstructive sleep apnoea syndrome. They have been engineered to automatically adjust the pressure to the optimal level on a continuous basis. However, not all APAP technologies use the same algorithm. Three different APAP devices (Autoset Spirit, Breas PV 10i and RemStar Auto) were compared in a randomised crossover trial in patients already established on fixed-pressure CPAP therapy. The outcome measures were compliance, quality of life and side-effects. Twenty-seven middle-aged patients (25 male) previously diagnosed with severe obstructive sleep apnoea syndrome (median (interquartile range) apnoea/hypopnoea index 48 (29-76)), established on CPAP therapy for >3 yrs, were randomised to each APAP device for 4 weeks. Mean pressure and patient compliance were significantly lower on the Breas PV 10i than on the other APAP devices. The devices were similar in terms of quality of life, daytime sleepiness and upper airway side-effects, but patients evaluated them significantly differently in terms of device features, sleep quality and pressure comfort, with the Breas PV 10i being the least popular. Auto-adjustable positive airway pressure devices differ in pressure delivery and patient compliance in obstructive sleep apnoea syndrome patients. 相似文献