全文获取类型
收费全文 | 808篇 |
免费 | 50篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 28篇 |
妇产科学 | 3篇 |
基础医学 | 54篇 |
口腔科学 | 21篇 |
临床医学 | 103篇 |
内科学 | 166篇 |
皮肤病学 | 21篇 |
神经病学 | 17篇 |
特种医学 | 150篇 |
外科学 | 64篇 |
综合类 | 65篇 |
预防医学 | 59篇 |
眼科学 | 5篇 |
药学 | 52篇 |
1篇 | |
中国医学 | 19篇 |
肿瘤学 | 30篇 |
出版年
2022年 | 8篇 |
2021年 | 10篇 |
2020年 | 13篇 |
2019年 | 13篇 |
2018年 | 18篇 |
2017年 | 11篇 |
2016年 | 14篇 |
2015年 | 37篇 |
2014年 | 32篇 |
2013年 | 36篇 |
2012年 | 44篇 |
2011年 | 41篇 |
2010年 | 53篇 |
2009年 | 38篇 |
2008年 | 36篇 |
2007年 | 47篇 |
2006年 | 22篇 |
2005年 | 31篇 |
2004年 | 25篇 |
2003年 | 24篇 |
2002年 | 6篇 |
2001年 | 9篇 |
1999年 | 6篇 |
1998年 | 29篇 |
1997年 | 24篇 |
1996年 | 29篇 |
1995年 | 23篇 |
1994年 | 23篇 |
1993年 | 15篇 |
1992年 | 6篇 |
1991年 | 4篇 |
1990年 | 5篇 |
1989年 | 16篇 |
1988年 | 17篇 |
1987年 | 11篇 |
1986年 | 8篇 |
1985年 | 10篇 |
1984年 | 9篇 |
1983年 | 6篇 |
1982年 | 9篇 |
1981年 | 4篇 |
1980年 | 9篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1976年 | 7篇 |
1975年 | 3篇 |
1973年 | 3篇 |
1968年 | 2篇 |
1967年 | 3篇 |
排序方式: 共有863条查询结果,搜索用时 13 毫秒
61.
目的 探讨乳腺癌术后化疗后放疗期间同期或序贯内分泌治疗的临床效果.方法 收集2003年1月~2007年1月本院行乳腺癌手术治疗且病理证明激素受体阳性的乳腺癌患者100例,将其分为同期组和序贯组,每组各50例.同期组给予化疗后放疗同期内分泌治疗,序贯组给予化疗后放疗序贯内分泌治疗.比较两组患者的临床疗效,随访统计两组患者毒副反应发生率及长期生存率.结果 同期组放射性肺炎、放射性肺纤维化、放射性皮肤纤维化发生率(分别为6.0%、10.0%、8.0%)与序贯组(分别为6.0%、8.0%、6.0%)比较,差异无统计学意义(P>0.05).同期组局部复发率(8.0%)、远处转移率(10.0%)及5年生存率(80.0%)与序贯组(分别为10.0%、14.0%、82.0%)比较,差异无统计学意义(P>0.05).结论 同期和序贯内分泌治疗并没有增加放疗的不良反应发生率,不会影响放疗的敏感性及总生存率. 相似文献
62.
目的:探讨德都红花-7味散原药方及优化方对肝纤维化大鼠Ⅰ,Ⅲ型胶原mRNA表达的影响。方法:40只Wistar大鼠分为正常组、模型组、阳性药组、原药组、优化组。大鼠ip 30%CCl4橄榄油溶液建立肝纤维化模型。同时1次/日ig给药,阳性药组给予秋水仙碱片0.4 mg·kg-1;原药组给予德都红花-7味散0.6 g·kg-1;优化组给予德都红花-7味散优化方0.6 g·kg-1。连续40 d后处死大鼠。取肝脏天狼星红染色,观察肝组织纤维化程度和Ⅰ,Ⅲ型胶原分型。酶联免疫吸附法(ELISA)检测肝组织匀浆Ⅲ型前胶原和Ⅳ型胶原,层粘连蛋白(LN),透明质酸(HA)含量。实时荧光定量PCR法检测Ⅰ型胶原,Ⅲ型胶原mRNA表达变化。结果:天狼星红染色模型组Ⅰ,Ⅲ型胶原纤维较正常组增多,阳性药组、原药组、优化组Ⅰ,Ⅲ型胶原纤维较模型组减少。与正常组比较,酶联免疫法检测模型组Ⅳ型胶原,HA含量升高(P0.05)。与模型组比较,阳性药组、原药组、优化组Ⅲ型前胶原、Ⅳ型胶原、HA含量明显降低(P0.05)。实时荧光定量PCR法检测模型组Ⅰ型胶原mRNA和Ⅲ型胶原mRNA表达较正常组上调(P0.01)。阳性药组、原药组、优化组Ⅰ型胶原mRNA和Ⅲ型胶原mRNA表达较模型组下调(P0.01)。原药组、优化组Ⅰ型胶原mRNA表达较阳性药组下调(P0.05)。优化组Ⅰ型胶原mRNA表达较原药组下调(P0.05)。结论:德都红花-7味散原药方与优化方是通过抑制Ⅰ型胶原mRNA和Ⅲ型胶原mRNA的转录,达到阻断或延缓肝纤维化的发生发展,德都红花-7味散优化方优于原药方。 相似文献
63.
目的分析并探讨高钠血症对重型颅脑损伤患者预后产生的影响及处理对策。方法对我院自2007年11月至2010年10月期间收治的78例重型颅脑损伤后伴高钠血症患者的临床资料做回顾性分析。78例患者按血清钠水平分为高血钠组及高血钠组。结果全部78例重型颅脑损伤患者中继发高钠血症者37例,发生高钠血症组的GCS评分为3~5分者30例,GCS评分为6~8分者7例,两组相比差异显著(P〈0.01),具有统计学意义。高钠血症患者有27例死亡,10例生存,两组的病死率相比,差异亦显著(P〈0.01),具有统计学意义。结论患者高钠血症的病情程度和GCS分值具有密切的相关性。对于高钠血症,临床工作中必须充分提高预防意识,重视其严重后果尽早采取纠正高钠血症措施,在保守治疗无效的情况下,应尽早开始血液净化治疗,改善患者的预后。 相似文献
64.
目的:了解孟根乌森乌日乐的急性毒性作用剂量及给药后的急性毒性反应和死亡分布情况,确定孟根乌森乌日乐的半数致死量( LD50)。方法用孔氏综合法(改进寇氏法)分为14.30,9.28,6.04,3.92,2.55,1.66 g? kg-16个剂量组,以0.4 mL/10 g的量灌胃给药1次。实验后观察14 d,记录体重变化及不良反应情况。结果孟根乌森乌日乐小鼠半数致死量为5.1597 g? kg-1(95%CI:3.6652~7.2637 g? kg-1)。14 d内未出现明显不良反应症状且体重有增长趋势。结论孟根乌森乌日乐的急性毒性实验的半数致死量为临床用药量的100倍,提示单次口服较为安全。 相似文献
65.
A clinical investigation of nightmares enhanced the psychotherapy of many hospitalized borderline patients. Early familial trauma, prominent in the latent content of the nightmares, predisposed these patients to adult dysfunction or to a maladaptive response to subsequent trauma. The hospital ward's emphasis on intergenerational family therapy and the well-integrated holding environment helped offset distress in patients resulting from the upsurgence of conflictual material latent in their nightmares, whether or not they were posttraumatic. The authors present illustrative cases. 相似文献
66.
67.
TA Fredriksen MM Wysocka-Bakowska A Bogucki F Antonaci 《Cephalalgia : an international journal of headache》1988,8(2):93-103
Eleven female patients with cervicogenic headache (mean age, 43 years; range, 25-59 years) have been examined with the pupillometer. The pupillary diameter was examined in the basal state (that is, the status before pharmacologic stimulation) and after topically administered tyramine (2%), phenylephrine (1%), and hydroxyamphetamine (1%). A total of 51 tests were performed, 35 in the asymptomatic period and 16 during pain attacks. In a control group consisting of 26 age-matched women a total of 39 tests were carried out. Before pharmacologic stimulation (that is, in the "basal state") the pupils were smaller in the asymptomatic (pain-free) period than during pain attacks in the patients and also as compared with that of control individuals. The anisocoria (the difference in pupillary size in the same individual) observed was not significantly different between the patient group and control individuals either in the basal state (before pharmacologic stimulation) or after pharmacologic stimulation. The mydriasis resulting from the instillation of the three sympathicomimetic drugs was symmetrical in both controls and patients both during and between the pain attacks. This finding is in clear contrast to what is found in cluster headache, in which there is a "Horner-like" syndrome on the symptomatic side. These two headaches thus seem to differ essentially with regard to this variable. 相似文献
68.
We studied clinical features potentially related to dysphagia and three
indices from a timed test of swallowing--average volume per swallow (ml),
average time (s) per swallow and swallowing capacity (ml/s)--in 181
screened healthy adults and 30 patients with motor neurone disease (MND).
In healthy adults, age, sex and height accounted for 44.3% and 55.6% of the
variance of log average volume per swallow and log swallowing capacity,
respectively. Symptoms and signs were more prevalent in the MND group and
were associated with reduced swallowing capacity and reduced average volume
per swallow; repeatability studies on these two indices in both groups
showed that the median difference between the mean of two recordings on
successive days and the mean of all recordings (6-15 over 3 days) was <
5% (maximum third quartile 12.8%, indices expressed as percent predicted
according to age and sex). Using this simple bedside test, swallowing
function can be quantified on a ratio scale and expressed as percent of
that predicted by age and sex; such information may improve the predictive
value of clinical assessment and provides a practical way of monitoring
change in patients with dysphagia.
相似文献
69.
KAZUYOSHI SUENARI M.D. YU‐FENG HU M.D. HSUAN‐MING TSAO M.D. CHING‐TAI TAI M.D. CHERN‐EN CHIANG M.D. YENN‐JIANG LIN M.D. SHIH‐LIN CHANG M.D. LI‐WEI LO M.D. TUAN TA‐CHUAN M.D. PI‐CHANG LEE M.D. NGUYEN HUU TUNG M.D. SHIH‐YU HUANG M.D. TSU‐JUEY WU M.D. SHIH‐ANN CHEN M.D. 《Journal of cardiovascular electrophysiology》2010,21(10):1114-1119
Gender Differences in Patients With AVNRT. Introduction: The detailed electrophysiological characteristics of the gender differences associated with atrioventricular nodal reentrant tachycardia (AVNRT) have not been clarified. This study investigated the gender‐related electrophysiological differences in a large series of patients undergoing radiofrequency catheter ablation. Methods and Results: A total of 2,088 consecutive AVNRT patients (men/women 869/1,219) who underwent catheter ablation were enrolled in this study. We evaluated the gender differences in their electrophysiological characteristics. Women had a significantly younger age of onset, higher incidence of multiple jumps, shorter AH interval, atrial effective refractory period (ERP), anterograde fast pathway ERP, anterograde slow pathway ERP, and retrograde slow pathway ERP, and longer ventricular ERP than men. The incidence of baseline ventriculoatrial dissociation was lower in women than in men. Women needed less isoproterenol/atropine to induce AVNRT. No gender differences in the radiation exposure time, procedure time, complication rate, acute success rate, or second procedure rate were noted. Both typical and atypical AVNRT were more predominant in women. In the patients with atypical AVNRT, there was no significant gender difference in incidence of baseline ventriculoatrial dissociation; however, the retrograde slow pathway ERP was significantly shorter in women than in men. Women of premenopausal age (≤50 years old) had a significantly higher incidence of anterograde multiple jumps and a retrograde jump phenomenon, and a shorter anterograde slow pathway ERP and retrograde slow pathway ERP than those of women over 50 years old. Conclusion: Gender differences in the anterograde and retrograde AV nodal electrophysiology were noted in the patients with AVNRT. (J Cardiovasc Electrophysiol, Vol. 21, pp. 1114‐1119) 相似文献
70.
Walcher J Strecker R Goldacker S Winterer J Langer M Bley TA 《Clinical rheumatology》2007,26(4):587-589
Raynaud’s disease is associated with disorders in blood circulation of the hands. The gold standard to visualise pathology
of digital arteries is catheter angiography. Contrast-enhanced MR angiography (CE MRA) has developed even more as an alternative
non-invasive method to digital subtraction angiography, mostly for pelvic or lower limb vessels. We report a case of primary
Raynaud’s disease with high-grade stenosis and an occlusion of the digital arteries. This case illustrates the benefit and
efficiency of CE MRA at high fields in depicting location and extension of peripheral arterial alterations. 相似文献