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   5207篇
  免费   260篇
  国内免费   52篇
耳鼻咽喉   64篇
儿科学   215篇
妇产科学   46篇
基础医学   265篇
口腔科学   41篇
临床医学   1144篇
内科学   675篇
皮肤病学   16篇
神经病学   301篇
特种医学   99篇
外科学   649篇
综合类   905篇
预防医学   436篇
眼科学   39篇
药学   481篇
  3篇
中国医学   56篇
肿瘤学   84篇
  2024年   7篇
  2023年   69篇
  2022年   165篇
  2021年   227篇
  2020年   244篇
  2019年   152篇
  2018年   164篇
  2017年   181篇
  2016年   166篇
  2015年   176篇
  2014年   509篇
  2013年   385篇
  2012年   362篇
  2011年   381篇
  2010年   280篇
  2009年   294篇
  2008年   251篇
  2007年   236篇
  2006年   178篇
  2005年   171篇
  2004年   125篇
  2003年   113篇
  2002年   75篇
  2001年   57篇
  2000年   49篇
  1999年   54篇
  1998年   44篇
  1997年   36篇
  1996年   28篇
  1995年   39篇
  1994年   26篇
  1993年   17篇
  1992年   28篇
  1991年   26篇
  1990年   21篇
  1989年   22篇
  1988年   23篇
  1987年   13篇
  1986年   16篇
  1985年   16篇
  1984年   18篇
  1983年   12篇
  1982年   14篇
  1981年   6篇
  1980年   6篇
  1979年   7篇
  1978年   9篇
  1976年   4篇
  1973年   4篇
  1972年   5篇
排序方式: 共有5519条查询结果,搜索用时 625 毫秒
1.
IntroductionWe aimed to assess, in patients with Parkinson's disease (PD), the association between obstructive sleep apnea (OSA), progression of motor dysfunction and the effect of OSA treatment.MethodsData were analysed from a prospective cohort study of idiopathic PD patients from a movement disorders clinic. Patients found to have OSA on polysomnography (apnea-hypopnea index [AHI] ≥15 events/h, OSA+) were offered treatment using continuous positive airway pressure (CPAP). CPAP+ was defined as an average ≥ 2 h/night use at each follow-up. Motor symptoms were assessed using the motor section of the Movement Disorder Society Unified Parkinson's Disease Rating Scale (mUPDRS) and the Timed-Up-And-Go (TUG). Follow-up times were 3, 6 and 12 months. Mixed models were constructed, adjusting for age, sex, body mass index, levodopa equivalent dose and comorbidities.ResultsWe studied 67 individuals (61.2% male) of mean age 64.7 years (SD = 10.1). Baseline mUPDRS was higher in OSA+ compared to OSA- (24.5 [13.6] vs. 16.2 [7.2], p < 0.001). Motor dysfunction increased at comparable rates in OSA- and OSA+CPAP-. However, in OSA+CPAP+, mUPDRS change was significantly lower compared to OSA- (β = −0.01 vs. 0.61, p = 0.03; p = 0.12 vs. OSA+CPAP- [β = 0.39]) and TUG change was lower compared to OSA+CPAP- (β = −0.01 vs. 0.13, p = 0.002; p = 0.05 vs. OSA- [β = 0.02]).ConclusionsIn this PD cohort, OSA was associated with higher baseline mUPDRS. In those with OSA, CPAP use was associated with stabilization of motor function (mUPDRS and TUG) over 12 months. These observations support further research to clarify the role of OSA in PD pathophysiology and motor dysfunction.  相似文献   
2.
目的运用PDCA循环的质量管理方法,改进居家养老护理文件书写质量。方法对现存的护理质量不合格项目进行原因分析、制定改进计划、组织实施、效果评价。结果改进后的居家养老护理文件书写合格率达到98%。结论通过应用PDCA循环质量管理工具进行护理质量管理,使该中心居家养老护理文件书写水平得到大幅度提高,同时促进了该中心护理管理质量的提升。  相似文献   
3.
目的探究持续质量改进在体检科护理质量管理中的应用效果。方法该次将该院在2018年7-12月的体检者200名作为研究的对象,视为对照阶段,采取常规护理管理方法;将该院2019年1-6月的体检者200名作为观察阶段对象,在护理管理工作中采取持续质量改进管理模式,进一步对比两个阶段患者对于体检科工作质量的评分。结果在体检工作质量、服务态度、体检满意度这3个模块,观察阶段评分对照阶段比较均明显更高,差异有统计学意义(P<0.05)。结论持续质量改进应用于体检科护理质量管理中,可有效提升体检服务品质,值得推广应用。  相似文献   
4.
Diabetes is a complex, chronic metabolic disorder affecting approximately 9.3% of the adult population with the estimated number of adults with diabetes worldwide having more than tripled since 2000. This increase has largely been attributed to global urbanization and lifestyle changes. Diabetes affects 10–15% of the surgical population. These patients are frequently elderly, have complex medical co-morbidities and present for both high-risk elective and emergency surgery. This multisystem disease poses a significant challenge to both anaesthesia and surgery with patients with diabetes demonstrating higher morbidity and mortality rates compared to their non-diabetic counterparts. It is crucial that good glycaemic control is maintained throughout the perioperative period as this has been shown to correlate with positive patient outcomes. It is well-recognized that a co-ordinated, multidisciplinary approach aimed at optimizing every point in the patient pathway from GP referral to post-discharge care is required to obtain the best outcomes for the surgical patient with diabetes. The anaesthetist has a key role in the perioperative diabetes multidisciplinary team. Patients themselves are well experienced in manging their own diabetes and should be involved in doing so whenever possible.  相似文献   
5.
We have carried out a prospective randomised, single blind clinical trial to investigate the effect of continuous passive motion on range of knee flexion, lack of extension, pain levels and analgesic use after total knee replacement surgery. 85 subjects were randomly allocated to control or study group. All subjects followed the existing rehabilitation protocol, which permits immediate active range of motion exercises and mobilisation with the study group using continuous passive motion for 1 h, twice a day. Outcome measures employed were range of motion, pain assessed on a visual analogue scale and analgesic use according to the WHO ladder. Blinded evaluation was carried out preoperatively, at time of discharge from hospital, 6 weeks, 6 and 12 months postoperation. No significant difference was observed between groups at all time intervals for each outcome variable using Wilcoxon Rank sum tests. The results substantiate previous findings that short duration continuous passive motion following total knee arthroplasty does not influence outcome of range of motion or reported pain.  相似文献   
6.
深静脉置管镇痛泵持续输入用于癌症病人镇痛   总被引:1,自引:0,他引:1  
目的探讨深静脉置管镇痛泵持续输入对癌症病人的镇痛效果。方法将芬太尼、氟哌利多、阿托品按预定浓度比注入微量镇痛泵,经股静脉或颈静脉穿刺并留置导管,缝合固定,与镇痛泵连接,药物即可均衡进入体内。结果全程测定NRS和PPI值分别为1.3和1.5。表明此法癌症病人止痛效果佳,全部病例均有效。结论深静脉置管镇痛泵持续输入对癌症病人镇痛效果确切,应用方便。  相似文献   
7.
Spinal epidural hematoma. Report of a case and review of the literature   总被引:3,自引:0,他引:3  
We report the case of a thoracic epidural hematoma at the T7-T9 level which occurred after placement of spinal epidural catheter for continuous anaesthesia in acute pancreatitis. The male patient felt a sudden back pain after six days of successful analgesia and became paraplegic 24 hours afterwards. An emergency laminectomy and removal of the hematoma were performed; however, the patient recovered only incompletely.We discuss the clinical signs and symptoms of spinal epidural hematoma as well as its diagnostics and therapy. The controversial views from the literature concernings its etiology are critically reviewed.  相似文献   
8.
目的:探讨使用便携式微量输液泵在肿瘤化疗中持续输注氟尿嘧啶的应用效果。方法:选取我科2006年3月-2008年7月96例癌症化疗病人按入院先后顺序分为对照组和实验组,每组48例。对照组采用传统的化疗方式,采用浅静脉留置针直接从外周静脉输注氟尿嘧啶(5-Fu)连续5天,每天维持6-8小时。实验组采用浅静脉留置针连接便携式微量输液泵持续泵入氟尿嘧啶(5-Fu)120h~135h,两组均以21天为1个周期,观察两组病人化疗毒副反应发生情况。结果:实验组化疗毒副反应发生率明显低于对照组,平均住院时间明显缩短,两组比较差异有统计学意义(P〈0.01)。结论:使用便携式微量输液泵持续泵入氟尿嘧啶能减轻病人的毒副反应,缩短住院时间,提高肿瘤病人生活质量,有效减轻护士的工作负担。  相似文献   
9.
目的 观察连续性静脉 -静脉血液滤过 (CVVH)联合机械通气治疗ARDS患者的临床疗效。方法 选择入住ICU符合ARDS诊断标准的患者 4 0例 ,随机分为 2组 :A组 2 1例 ,采用常规治疗 +机械通气 ;B组 1 9例 ,采用常规治疗 +机械通气 +CVVH。分别观察 2组患者在使用呼吸机时间、氧合指数、吸入氧浓度、动脉血氧分压、PEEP水平、心率、血压及病死率等方面的差别。结果 A、B两组患者在病因、年龄、性别、APACHEⅡ评分及平均脏器功能障碍数等方面相似 ,B组患者加用CVVH后 ,各项指标经统计学处理显示 :病死率 ,B组与A组比较 ,差异有显著性意义 (P <0 0 5 ) :其他指标与A组比较 ,差异均有高度显著性意义 (P <0 0 1 )。结论 CVVH疗法可有效清除ARDS患者血管外肺水和各种应激激素、致炎介质 ,明显改善了ARDS患者肺部氧合功能及血流动力学指标 ,提高了抢救成功率  相似文献   
10.
目的研究奥沙利铂(L-OHP)持续腹腔热灌注治疗癌性腹水的疗效和毒副作用。方法将76例癌性腹水患者随机分为三组:奥沙利铂持续腹腔热灌注化疗组(热化组)26例,引出腹水后,在加热的5%葡萄糖溶液2500~3500ml中加入L-OHP200mg/m2,持续体外循环腹腔热灌注,腹腔内温度保持在41~43℃,持续60min;腹腔内注射奥沙利铂化疗组(单化组)26例,常规腹腔穿刺引流腹水后注射L-OHP200mg/m2。单纯腹腔热灌注组(单热组)24例,加热5%葡萄糖溶液2500~3500ml,持续热灌注60min。结果总有效率(CR PR)54%(41/76)。热化组、单化组和单热组的有效率分别为76.9%(20/26)、50.0%(13/26)、33.3%(8/24),P<0.05。急性腹痛:热化组53.8%(14/26),单热组16.7%(4/24)。单化组无急性腹痛病例,P<0.05。麻痹性肠梗阻:热化组19.2%(5/26),单化组7.7%(2/26),单热组16.7%(4/24),P>0.05。结论奥沙利铂持续腹腔热灌注治疗恶性腹水是一种新的有效的治疗方法,毒副作用不大。  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