首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1156篇
  免费   68篇
  国内免费   34篇
耳鼻咽喉   7篇
儿科学   17篇
妇产科学   3篇
基础医学   51篇
口腔科学   8篇
临床医学   138篇
内科学   214篇
皮肤病学   29篇
神经病学   7篇
特种医学   107篇
外科学   168篇
综合类   200篇
预防医学   51篇
眼科学   17篇
药学   134篇
  2篇
中国医学   98篇
肿瘤学   7篇
  2023年   20篇
  2022年   32篇
  2021年   32篇
  2020年   35篇
  2019年   13篇
  2018年   13篇
  2017年   36篇
  2016年   29篇
  2015年   56篇
  2014年   94篇
  2013年   105篇
  2012年   85篇
  2011年   100篇
  2010年   86篇
  2009年   51篇
  2008年   61篇
  2007年   66篇
  2006年   43篇
  2005年   43篇
  2004年   19篇
  2003年   24篇
  2002年   28篇
  2001年   28篇
  2000年   19篇
  1999年   9篇
  1998年   10篇
  1997年   10篇
  1996年   7篇
  1995年   10篇
  1994年   10篇
  1993年   9篇
  1992年   8篇
  1991年   10篇
  1990年   8篇
  1989年   3篇
  1988年   5篇
  1987年   3篇
  1986年   6篇
  1985年   5篇
  1984年   4篇
  1983年   2篇
  1982年   2篇
  1981年   5篇
  1980年   2篇
  1979年   3篇
  1978年   1篇
  1977年   4篇
  1976年   2篇
  1975年   2篇
排序方式: 共有1258条查询结果,搜索用时 15 毫秒
1.
Background and Study AimsEndoscopic submucosal dissection (ESD) is the most effective treatment for early gastric cancer or gastric adenoma. However, ESD results in iatrogenic ulcers and postoperative bleeding from ulcers. This study aimed to evaluate the effect of using a proton pump inhibitor (PPI) alone, a PPI + rebamipide combination therapy, and an H2 receptor antagonist (H2RA) + rebamipide combination therapy on ulcer healing after ESD.Patients and MethodsA total of 204 patients who underwent ESD from April 2014 to July 2017 at Dong-A University Hospital were randomly assigned to the following groups: PPI-alone group, PPI + rebamipide combination therapy group, and H2RA + rebamipide combination therapy group. However, only 156 patients were studied since we excluded those who were lost to follow-up or had diseases other than early gastric cancer or gastric adenoma. Twenty-eight days after ESD, we evaluated the ulcer residual ratio, S stage rates, ulcer bleeding ratio, and gastric pH.ResultsThis study included 156 patients (PPI-alone group: 52 patients; PPI + rebamipide group: 52 patients; H2RA + rebamipide group: 52 patients). The ulcer residual ratios were 24.3 ± 14.2%, 17.0 ± 12.1%, and 21.0 ± 13.8% in the PPI alone, PPI + rebamipide, and H2RA + rebamipide groups, respectively (P = 0.048).ConclusionsPPI + rebamipide was more effective in reducing the ulcer residual ratio after ESD. There was no statistical difference in ulcer stage and delayed bleeding after ESD among the groups. These findings showed that PPI + rebamipide had limited benefits after ESD.  相似文献   
2.
BackgroundAmino acids are associated with wound healing in traumatic wounds and burns, although their effects on healing in patients with diabetic foot ulcers (DFUs) are limited. This study aimed to evaluate and identify specific amino acids associated with healing outcomes of patients with DFUs.MethodsSixty-two out of 85 patients who completed the in-hospital treatment for limb-threatening DFUs were enrolled. All ulcers had epithelialization without clinical evidence of infection at discharge. The patients and their families were instructed on foot-care techniques and committed to regular follow-up for 1 year. Baseline characteristics, PEDIS wound classification, laboratory data and serum amino acid levels were used to analyze their predictive power.ResultsFifty-seven patients completed the study in which 38 had healed and 19 had unhealed ulcers. The unhealed group had higher incidence of coronary artery disease and larger wound size. Most patients received endovascular therapy (81.6% healed group; 78.9% unhealed group) before enrollment. Following adjustments for clinical factors, the serum levels of arginine (326.4 μmol/L vs. 245.0 μmol/L, P = 0.045), isoleucine (166.7 μmol/L vs. 130.1 μmol/L, P = 0.019), leucine (325.8 μmol/L vs. 248.9 μmol/L, P = 0.039), and threonine (186.7 μmol/L vs. 152.0 μmol/L, P = 0.019) were significantly higher in the healed group.ConclusionsThe amino acids associated with wound healing in DFUs differ from those reported for traditional traumatic wounds. These findings affirm the necessity for future large-scaled studies for the application of these amino acids in DFU healing, either as prognostic predictors or supplemented regimens.  相似文献   
3.
4.
通过使用中医传承辅助系统软件,对李佃贵教授在治疗消化性溃疡药-证及四气五味归经方面进行整理,分析其内在用药规律,为临床辨证论治提供参考。方法收集整理李佃贵教授门诊治疗消化性溃疡的经验处方,通过将符合标准的150首中药处方依次录入系统中,来探索并分析出消化性溃疡用药规律。结果经分析得出,150首处方中,核心用药为炒白术,其次为黄连、陈皮、茵陈、乌药、砂仁、枳实、茯苓、川芎、厚朴;药性大多为辛、苦、寒,主归脾、胃、肝经,主要证型为胃气壅滞证、湿浊中阻证、浊毒内蕴证、胃络瘀阻证、胃阴不足证、脾胃虚弱证。最常用药类型为清热解毒、健脾芳香化浊、清热化湿和活血化瘀药。结论通过对李教授治疗消化性溃疡用药规律的分析,总结出其善于将芳香药与苦寒药结合使用,芳香以化浊,苦寒以清热;行气药与活血化瘀药相结合,行气可止痛,活血以化瘀。  相似文献   
5.
BackgroundPressure ulcers (PUs) impact on patient's quality of life and are costly for healthcare providers. Heels are a particular concern due to specific risk factors. Relative effectiveness of medical devices, e.g., dressings, off-loading devices, heel cushioning devices, to reduce PU development is unknown.MethodsSystematic review of the effectiveness of heel-specific medical devices for the prevention of heel PU (HPU)s. Database searches were performed from inception to June 2021 for RCTs. The primary outcome was incidence of new HPUs. Trials were assessed for risk of bias and data analysed with risk ratios, mean difference or hazard ratios as appropriate.ResultsFifteen RCTs (4724 participants) were identified.Dressings, as constant low pressure (CLP) devices vs standard care: eight trials (very low quality) showed no-significant difference in effectiveness (RR 0.31, 95%CI 0.10 to 1.01).Off-loading devices vs standard care: three trials (low quality), showed significant reduction in development of Category≥1 HPUs (RR 0.20, 95%CI 0.05 to 0.80) two trials (medium quality), showed significant reduction in development of Category≥2 HPUs (RR 0.08, 95%CI 0.01 to 0.67).Comparisons between off-loading devices: two trials (low quality) showed no clear difference in HPU incidence.In a paediatric post-surgical population, one trial of off-loading device and one of a dressing (CLP device), both versus standard care, showed no clear difference in HPU incidence (RR 0.19 95%CI 0.02 to 1.55 and RR 0.89 95%CI 0.56 to 1.42 respectively).ConclusionsOff-loading devices may reduce HPU incidence, from low-quality evidence. There is insufficient evidence to suggest that dressings reduce HPU incidence.  相似文献   
6.
目的:分析湿润烧伤膏(MEBO)联合高压氧治疗糖尿病足溃疡的临床效果,并探讨其作用机制。方法将该院于2009年6月-2014年6月收治的50例糖尿病足溃疡患者随机分为2组,观察组使用MEBO联合高压氧进行治疗,对照组给予常规换药。于治疗后记录两种方法对溃疡的治疗21 d后创面愈合率、治愈时间、换药疼痛程度等指标。结果在糖尿病足治疗效果、治愈时间、换药疼痛程度等方面观察组组均优于对照组(P<0.05)。结论MEBO联合高压氧治疗糖尿病足溃疡临床疗效优于对照组。其机制可能与保持创面生理性湿润环境、改善创面微循环,减轻溃疡局部缺氧状态有关。  相似文献   
7.
目的:探讨胰岛素泵治疗溃疡型糖尿病足感染患者的临床疗效,为临床防治提供参考。方法:选取2011年2月至2014年2月我院收治的84例溃疡型糖尿病足感染患者为研究对象,随机分为对照组( n=42例)和治疗组( n=42例);两组都在抗感染治疗基础上,对照组给以多次皮下注射胰岛素治疗( MSⅡ),治疗组给以胰岛素泵持续皮下输注治疗( CSⅡ)记录两组患者的治疗前及治疗后1周、2周及4周的溃疡面积、空腹血糖水平( FPG)、C-反应蛋白( CRP )、白细胞计数( WBC计数);记录治疗4周后的溃疡愈合的情况以及分析与溃疡愈合的相关因素。结果:与对照组比较,治疗组在治疗后2周、4周时的溃疡面积明显缩小( P<0.05),在治疗后1周、2周及3周的FPG、CRP及WBC计数明显降低(P<0.05);治疗4周后,治疗组的溃疡愈合良好率(88.1%)明显高于对照组(66.7%)(χ2值=5.509,P=0.019);多因素Logistic回归分析显示:基线(治疗前) FPG、CRP 及WBC 及治疗4周后FPG、CRP及WBC计数与溃疡愈合呈现正相关( P<0.05)。结论:胰岛素泵能够有效控制溃疡型糖尿病足感染患者的血糖水平,抑制患者的炎症反应,防治感染扩散,对促进溃疡愈合起到促进良好的促进作用。  相似文献   
8.
《The surgeon》2022,20(5):e206-e213
ObjectivesThe objective of this systematic review and meta-analysis was to evaluate rates of ulcer healing following ultrasound-guided foam sclerotherapy (UGFS).MethodsThe MEDLINE, CENTRAL and Embase databases were used to search for relevant studies using the terms ' (sclerotherapy AND ulcer) OR (vein AND ulcer) OR (sclerotherapy AND vein)'. Heterogeneity between studies was quantified using the I2 statistic. A random effects model was used to calculate risk ratios where substantial heterogeneity was found.ResultsThe initial search yielded 8266 articles. 8 studies were included in the qualitative synthesis and 3 in the meta-analysis. Superior complete ulcer healing rates were noted in patients treated with foam sclerotherapy versus compression therapy alone (pooled OR 6.41, 95% CI = 0.3–148.2, p = 0.246, random effects method). A marked degree of heterogeneity was observed between studies (I2 = 81%).ConclusionA prospective, trial is warranted in order to determine the true merits of UGFS in the setting of venous ulceration.  相似文献   
9.
目的探讨经皮腔内血管成形术(PTA)联合负压伤口疗法(NPWT)治疗缺血性糖尿病足溃疡的临床效果。方法64例缺血性糖尿病足溃疡患者,依据治疗方法不同分为NPWT组和PTA联合NPWT组,每组32例。NPWT组患者采用NPWT治疗,PTA联合NPWT组患者采用PTA联合NPWT治疗。比较两组治疗前后踝肱指数、伤口愈合时间、保足率。结果PTA术后足部皮肤温度升高,血液供应明显改善,足背动脉搏动增强。术后患肢CT血管造影(CTA)图像见:患肢动脉狭窄闭塞动脉开通,远端可见足背血管显影。坏死趾节截趾清创NPWT治疗后创面肉芽生长良好。植皮治疗后伤口愈合良好。治疗前,两组患者踝肱指数比较差异无统计学意义(P>0.05);PTA合并NPWT组患者治疗2周后踝肱指数(0.52±0.19)、保足率93.8%均高于NPWT组的(0.44±0.08)、75.0%,差异具有统计学意义(P<0.05);两组患者创面愈合时间比较差异无统计学意义(P>0.05)。结论PTA联合NPWT治疗缺血性糖尿病足溃疡的疗效优于单独应用NPWT治疗,可提高保足率。  相似文献   
10.
目的探讨负压封闭引流联合前列地尔促进糖尿病足溃疡创面愈合的疗效及机制。 方法将广州市第一人民医院烧伤科2017年1月至2018年12月收治的43例采用负压封闭引流进行治疗的糖尿病足溃疡患者按随机数字表法分为观察组(n=23)和对照组(n=20),2组患者均进行负压封闭引流治疗,在此基础上观察组联合静脉滴注前列地尔。治疗前及治疗第7、14天,分别采集2组患者晨空腹静脉血3 mL;治疗第7、14天,采集患者引流袋中引流液5 mL,离心取上清液,移入已消毒的Eppendorf管中,密封,冻存于-80 ℃低温冰箱,并于患者更换负压材料时取部分肉芽组织,10%甲醛固定,石蜡切片。分别检测观察组及对照组患者治疗前,治疗第7、14天血液中降钙素原和血清白蛋白含量及治疗第7、14天引流液中的一氧化氮、血管内皮生长因子(VEGF)、肉芽组织晚期糖基化终末产物受体(RAGE)及腐胺含量,数据比较采用t检验和χ2检验。 结果治疗前2组患者降钙素原和血清白蛋白含量比较差异无统计学意义(P值均大于0.05);治疗第7、14天,观察组降钙素原分别为(0.61±0.46)、(0.30±0.28) ng/mL,低于对照组(0.93±0.47)、(0.49±0.29) ng/mL,差异均有统计学意义(t=-2.21、-2.15,P=0.03、0.04);观察组血清白蛋白[(27.13±2.13)、(28.78±1.90) g/L],高于对照组[(25.48±2.66)、(25.48±2.66) g/L],差异均有统计学意义(t=2.17、3.18,P=0.04、<0.01)。观察组治疗第7、14天引流液中一氧化氮含量分别为(86.30±5.82)、(106.97±6.44) μmol/L,浓度高于对照组[(65.64±5.76)、(84.80±9.19) μmol/L],差异均有统计学意义(t=11.67、9.25,P值均小于0.01);VEGF含量分别为(123.04±11.76)、(240.15±38.85) pg/mL,浓度高于对照组[(85.09±6.72)、(129.57±17.28) pg/mL],差异均有统计学意义(t=12.72、11.74,P值均小于0.01);观察组治疗第7、14天,引流液中腐胺浓度为(0.63±0.08)、(0.22±0.08)mg/L,低于对照组[(0.81±0.09)、(0.41±0.08)mg/L],差异均有统计学意义(t=-6.74、-12.15,P值均小于0.01);取材的肉芽组织中RAGE为37.1±6.76、17.17±5.54,表达低于对照组(52.94±8.72、38.00±5.69),差异均有统计学意义(t=-6.90、-7.95,P值均小于0.05);观察组治疗的总有效率为95.70%,对照组为60.00%,比较差异有统计学意义(χ2=9.00,P=0.029)。 结论负压封闭引流联合前列地尔可以促进糖尿病足溃疡创面愈合,其机制与前列地尔促进血管内皮分泌一氧化氮、VEGF,加速创面腐胺清除,促进创面肉芽生长的同时抑制RAGE表达有关。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号