全文获取类型
收费全文 | 1882篇 |
免费 | 86篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 40篇 |
妇产科学 | 128篇 |
基础医学 | 218篇 |
口腔科学 | 3篇 |
临床医学 | 170篇 |
内科学 | 548篇 |
皮肤病学 | 56篇 |
神经病学 | 104篇 |
特种医学 | 50篇 |
外科学 | 163篇 |
综合类 | 21篇 |
一般理论 | 1篇 |
预防医学 | 59篇 |
眼科学 | 57篇 |
药学 | 173篇 |
2篇 | |
中国医学 | 58篇 |
肿瘤学 | 119篇 |
出版年
2024年 | 2篇 |
2023年 | 9篇 |
2022年 | 9篇 |
2021年 | 27篇 |
2020年 | 14篇 |
2019年 | 22篇 |
2018年 | 35篇 |
2017年 | 15篇 |
2016年 | 21篇 |
2015年 | 44篇 |
2014年 | 53篇 |
2013年 | 74篇 |
2012年 | 127篇 |
2011年 | 101篇 |
2010年 | 97篇 |
2009年 | 67篇 |
2008年 | 110篇 |
2007年 | 155篇 |
2006年 | 146篇 |
2005年 | 123篇 |
2004年 | 96篇 |
2003年 | 91篇 |
2002年 | 88篇 |
2001年 | 86篇 |
2000年 | 55篇 |
1999年 | 62篇 |
1998年 | 28篇 |
1997年 | 15篇 |
1996年 | 16篇 |
1995年 | 13篇 |
1994年 | 16篇 |
1993年 | 9篇 |
1992年 | 29篇 |
1991年 | 25篇 |
1990年 | 24篇 |
1989年 | 7篇 |
1988年 | 14篇 |
1987年 | 19篇 |
1986年 | 7篇 |
1985年 | 13篇 |
1984年 | 6篇 |
1983年 | 3篇 |
1981年 | 1篇 |
1977年 | 1篇 |
1975年 | 2篇 |
1974年 | 1篇 |
排序方式: 共有1978条查询结果,搜索用时 22 毫秒
51.
Chu CS Cheng KH Lee KT Lin TH Lee ST Su HM Voon WC Sheu SH Lai WT 《The Kaohsiung journal of medical sciences》2005,21(11):511-516
The Heart Outcomes Prevention Evaluation (HOPE) study demonstrated that the angiotensin-converting enzyme inhibitor, ramipril, significantly reduces mortality, myocardial infarction and stroke in high-risk cardiovascular patients, beyond the benefits from blood pressure lowering. The tolerability of ramipril 10 mg/day has been an important concern when applying these results. Following the same criteria as the HOPE study, we investigated the adverse effects profile and tolerability of 10 mg ramipril in high-risk patients at our institution. In total, 92 patients with high cardiovascular risk were eligible for this study. Initially, ramipril was prescribed 2.5 mg orally once daily, and then titrated up to 5.0, 7.5, and 10.0 mg/day at 1-month intervals. The target maintenance dose was 10 mg/day. All adverse events were recorded during at least 3 months of follow-up. After 4-6 months of the titration protocol, only 18 patients (25.3%) reached and remained on ramipril 10 mg/day; 11 (15.5%), 22 (30.9%), and 20 patients (28.2%) remained on 2.5, 5.0, and 7.5 mg/day, respectively. Twenty-one patients (22.6%) had at least one adverse event. Twelve patients (13.0%) stopped treatment because of adverse effects. A total of 23 episodes of adverse events were reported, including cough (15.1%), dizziness (6.0%), and hypotension (2.4%). Ramipril was relatively well tolerated in our study population. However, only one-quarter of our patients reached the target maintenance dose of 10 mg/day. Dry cough, dizziness, and hypotension were the major side effects. About 15% of our patients discontinued ramipril treatment, which is comparable with previous reports. 相似文献
52.
Lee ST Lin TH Su HM Chiu CC Voon WC Lai WT Sheu SH Lin YT 《The Kaohsiung journal of medical sciences》2005,21(11):517-521
Aneurysm of the sinus of Valsalva (ASV), frequently associated with ventricular septal defect (VSD), is a rare cardiac disease that may be acquired or congenital. Rupture of an ASV, rare in the noncoronary cusp, usually produces serious hemodynamic change and carries poor prognosis if not treated surgically. We present the case of a 55-year-old female who came to us complaining of exertional dyspnea. Transthoracic echocardiography and aortography showed a noncoronary cusp ASV with rupture into the right atrium but without VSD. Because of high left to right shunt flow, she underwent successful surgical intervention with aneurysm repair approached from both the aorta and right atrium with a knitted Dacron patch. This was a rare case of noncoronary cusp involvement in ASV that ruptured into the right atrium without VSD. 相似文献
53.
Titin, an elastic and giant myofibrillar protein, is responsible for generating passive tension and maintaining sarcomere structure in striated muscles. Several studies have reported attenuation of passive tension and disorganization of sarcomere in atrophic muscles, but the changes of titin have not been investigated after denervation. For this purpose, we used sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and immunofluorescent staining to examine titin in innervated and denervated tibialis anterior (TA) muscles of the rat. With increasing denervation time, we found a greater loss of titin than myosin heavy chain (MHC) and actin contents in atrophic TA muscle. The ratios of titin/MHC and titin/actin gradually decreased following denervation. In contrast, ratios of MHC/actin in the denervated groups showed no significant differences with the controls even at 56 days postdenervation. The ultrastructure of myofibrils also showed disturbed arrangements of myofilaments and a disorganized contractile apparatus in denervated muscle. Immunofluorescent staining displayed translocation of the titin epitope from the Z-line to the I-band, suggesting that the apparent cleavage of titin occurred near the Z-line region during the atrophying process. Our study provides evidence that titin is more sensitive to degradation than MHC and actin after denervation. Moreover, the titin decline results in the loss of titin-based sarcomeric integrity in atrophic muscle. 相似文献
54.
We present a rare occurrence of an early-onset extensive cystic hygroma colli with intralesional hemorrhage and a favorable outcome. A 23-year-old primigravida woman was referred for management of a left isolated extensive cystic hygroma colli at 22 weeks' gestation. Amniocentesis revealed a 46, XY karyotype. Ultrasound-guidance in utero paracentesis was performed weekly or fortnightly from 22 to 36 gestational weeks. The aspirated fluid was chocolate-colored and contained abundant lymphocytes, erythrocytes, and protein. Despite multiple aspirations, the fetal cystic hygroma colli increased in size from 5.2x4.2 cm at 22 weeks' gestation to 9x9.7 cm at 36 weeks' gestation. The woman underwent cesarean section at 36 week's gestation and a-2808 g neonate was born with a 10x6 cm left neck mass, which did not impair spontaneous normal respiration. At the age of 4 days, the neonate underwent simple excision of the cystic hygroma, which was confined to the anterior superficial neck. The neonate was discharged 4 days after operation in good condition. In the present case, in utero paracentesis did not prevent the progressive growth of an early-onset extensive cystic hygroma colli with intralesional hemorrhage. However, lack of extension of the lesion into the surrounding structures and successful postnatal surgery contributed to the favorable outcome of this patient. 相似文献
55.
A new sesquiterpenoid, junceol A(1), as well as two known diterpenoids, sclerophytin A (2) and cladiellisin (3), have been isolated from the sea pen octocoral Virgularia juncea. The structure of metabolite 1 was determined by extensive spectral analysis. Compounds 1-3 have been shown to exhibit cytotoxicity toward P-388 cancer cells. 相似文献
56.
A patient presented with a huge, pedunculated abdominal cystic lymphangioma arising from the quadrate lobe of the liver near
the round ligament. Microscopically, dilated hepatic ducts with scant liver tissue could be recognized in the main cyst. A
review of the literature reveals no previous report of a lymphangioma arising in this manner or from this area.
Accepted: 31 June 1999 相似文献
57.
Wu WY Sheu BC Lin HH 《European journal of obstetrics, gynecology, and reproductive biology》2008,136(1):121-125
OBJECTIVE: The objective was to compare the sensitivity of the 20-min pad test by infusion of 250 ml of water with the strong-desire amount in the bladder in women with stress urinary incontinence (SUI). STUDY DESIGN: Eighty-three women with SUI were enrolled between November 2005 and January 2006. The 20-min pad test by infusion of 250 ml of water was performed before urodynamic study (UDS). The strong-desire amount pad test was done after UDS. The results were analyzed by Pearson's chi(2) and Wilcoxon's signed-rank tests. RESULTS: The sensitivity by infusion of the strong-desire amount was better than infusion of 250 ml of water in the 20-min pad test (P<0.001). In the quantitative study, the two pad tests had fair agreement and the pad weight results of the infusion of the strong-desire amount were statistically higher than the infusion of 250 ml of water (P=0.0004). CONCLUSIONS: The infusion of the strong-desire amount had better sensitivity measured by the 20-min pad test in women with SUI compared with infusion of 250 ml of water in the bladder. 相似文献
58.
Chen SY Chang DY Sheu BC Torng PL Huang SC Hsu WC Chang WC 《Journal of minimally invasive gynecology》2008,15(5):559-565
STUDY OBJECTIVE: To estimate whether laparoscopic in situ morcellation (LISM) can facilitate laparoscopic-assisted vaginal hysterectomy (LAVH) for large uteri. DESIGN: Prospective study (Canadian Task Force classification II-1). SETTING: University-affiliated hospital. PATIENTS: In all, 147 women with myoma or adenomyosis weighing more than 500 g from January 2004 through December 2007 were enrolled. The patients were divided into 4 subgroups: patients with uteri weighing 500 to 749 g who had traditional LAVH without LISM (group 1A, n = 69) or with LISM (group 1B, n = 16); and patients with uteri weighing 750 g or more who were treated by traditional LAVH without LISM (group 2A, n = 38) or with LISM (group 2B, n = 24). INTERVENTIONS: Laparoscopic-assisted vaginal hysterectomy with or without LISM. MEASUREMENT AND MAIN RESULTS: No significant differences existed in age, body mass index, preoperative diagnoses, complications, or duration of hospital stay among groups. The mean uterine weights were 608 +/- 75, 597 +/- 66, 989 +/- 179, and 935 +/- 226 g for groups 1A, 1B, 2A, and 2B, respectively. The operative time (120 +/- 16 vs 157 +/- 36 minutes, p <.001; 140 +/- 19 vs 224 +/- 57 minutes, p <.001) were significantly shorter in patients with LISM than without in both groups 1 and 2. The estimated blood loss was highest in group 2A. Six (16%) patients lost more than 500 mL of blood and 3 (8%) of them needed blood transfusions. Conversion to laparotomy occurred in 1 (2.6%) of 38 patients in group 2A. No repeated surgery or surgical mortality occurred. CONCLUSION: Laparoscopic-assisted vaginal hysterectomy with LISM was an efficient and safe procedure for removal of large uteri during LAVH. 相似文献
59.
60.