全文获取类型
收费全文 | 1032篇 |
免费 | 53篇 |
国内免费 | 42篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 31篇 |
妇产科学 | 8篇 |
基础医学 | 155篇 |
口腔科学 | 17篇 |
临床医学 | 140篇 |
内科学 | 220篇 |
皮肤病学 | 28篇 |
神经病学 | 30篇 |
特种医学 | 213篇 |
外科学 | 73篇 |
综合类 | 17篇 |
预防医学 | 70篇 |
眼科学 | 16篇 |
药学 | 41篇 |
中国医学 | 1篇 |
肿瘤学 | 60篇 |
出版年
2021年 | 5篇 |
2019年 | 8篇 |
2018年 | 15篇 |
2017年 | 8篇 |
2016年 | 6篇 |
2015年 | 26篇 |
2014年 | 21篇 |
2013年 | 35篇 |
2012年 | 29篇 |
2011年 | 29篇 |
2010年 | 39篇 |
2009年 | 27篇 |
2008年 | 35篇 |
2007年 | 50篇 |
2006年 | 32篇 |
2005年 | 33篇 |
2004年 | 23篇 |
2003年 | 13篇 |
2002年 | 17篇 |
2001年 | 13篇 |
2000年 | 15篇 |
1999年 | 18篇 |
1998年 | 37篇 |
1997年 | 38篇 |
1996年 | 41篇 |
1995年 | 37篇 |
1994年 | 48篇 |
1993年 | 26篇 |
1992年 | 18篇 |
1991年 | 18篇 |
1990年 | 19篇 |
1989年 | 41篇 |
1988年 | 44篇 |
1987年 | 42篇 |
1986年 | 32篇 |
1985年 | 25篇 |
1984年 | 23篇 |
1983年 | 14篇 |
1982年 | 11篇 |
1981年 | 10篇 |
1980年 | 12篇 |
1978年 | 5篇 |
1977年 | 10篇 |
1976年 | 8篇 |
1975年 | 8篇 |
1969年 | 5篇 |
1967年 | 5篇 |
1966年 | 5篇 |
1930年 | 4篇 |
1929年 | 5篇 |
排序方式: 共有1127条查询结果,搜索用时 140 毫秒
1.
Reliability of reporting nosocomial infections in the discharge abstract and implications for receipt of revenues under prospective reimbursement. 总被引:1,自引:0,他引:1
下载免费PDF全文
![点击此处可从《American journal of public health》网站下载免费的PDF全文](/ch/ext_images/free.gif)
R M Massanari K Wilkerson S A Streed W J Hierholzer Jr 《American journal of public health》1987,77(5):561-564
Proper reporting of discharge diagnoses, including complications of medical care, is essential for maximum recovery of revenues under the prospective reimbursement system. To evaluate the effectiveness of abstracting techniques in identifying nosocomial infections at discharge, discharge abstracts of patients with nosocomial infections were reviewed during September through November of 1984. Patients with nosocomial infections were identified using modified Centers for Disease Control (CDC) definitions and trained surveillance technicians. Records which did not include the diagnosis of nosocomial infections in the discharge abstract were identified, and potential lost revenues were estimated. We identified 631 infections in 498 patients. On average, only 57 per cent of the infections were properly recorded and coded in the discharge abstract. Of the additional monies which might be anticipated by the health care institution to assist in the cost of care of adverse events, approximately one-third would have been lost due to errors in coding in the discharge abstract. Although these lost revenues are substantial, they constitute but a small proportion of the potential costs to the institution when patients acquire nosocomial infections. 相似文献
2.
3.
4.
SUMMARY A case congenital dislocation of both knees and dislocation of the left hip in an infant whose mother had a chronic amniotic fluid leakage after mid-trimester amniocentesis. 相似文献
5.
The difficulty in obtaining approval for payment of durable medical equipment by third party payers has impeded the rehabilitation program and discharge planning of many spinal cord patients throughout the country for many years. To gain some insight as to the number and level of patients affected, the kinds of equipment denied, the reasons given for the denial, which third party payers were mostly involved and how the patient and his/her family managed to cope or resolve this problem, a survey was undertaken. Letters were sent to 259 members of the American Spinal Injury Association (ASIA) asking them to list representative cases where requests for equipment deemed necessary were denied. Twenty-eight responses from different institutions were received from sixteen states describing 110 patients and 180 pieces of durable medical equipment denied in 1984 and 1985. Manual wheelchairs, motorized wheelchairs, shower/commode chairs, and environmental control units were the four most common equipment items denied by the third party payers. Government agencies ie., Medicaid, Medicare, Vocational Rehabilitation Departments and State Crippled Children's Services were the most frequent deniers, comprising 54% of the total sample. They were followed by private insurance (31%) and Workman's Compensation (3%). By far, the two most common reasons given for denials were: it was not covered by the insurance policy (38%) and it was not medically necessary (30%). Ninety (90) pieces of equipment (50%) were eventually obtained, most often by charity, or through the patient's family resources. 相似文献
6.
7.
高效液相色谱法测定右旋儿茶素血浆浓度及药代动力学参数 总被引:1,自引:0,他引:1
本文建立了体液中右旋儿茶素的RP-HPLC测定方法。采用C_(18)键合相硅胶为填料的固相提取柱进行样品预处理,右旋儿茶素的提取回收率为79.8%.应用二极管阵列检测器对色谱峰纯度进行鉴定。该法精密度好,方法回收率近100%,日内、日间的变异系数为2.4~5.6%,血浓69.6~1160 ng/ml范围内呈线性关系,r=0.9993。家兔静注右旋儿茶素18mg/kg,其药代动力学过程符合二室模型,分布相半衰期为0.129 h,消除相半衰期为1.19h。 相似文献
8.
9.
石杉碱甲类似物的研究II.N-甲基吡啶酮石杉碱甲类似物的合成 总被引:4,自引:1,他引:3
石杉碱甲(1)是从中草药石杉属植物千层塔(Lycopodium serratum Thunb.)中分得的一种高效可逆的乙酰胆碱酯酶抑制剂,临床试验证实它对早老性痴呆症有显著疗效。本文报道N-甲基吡啶酮石杉碱甲类似物2和3的合成。2-甲氧基-5-甲氧羰基-11-亚甲基-5,9-甲撑环辛-7-烯并吡啶(9)在乙腈中用三甲基氯硅烷和碘化钠选择性脱保护以定量的产率得吡啶酮10,再用甲醇钠和碘甲烷甲基化得N-甲基吡啶酮11,11经碱性水解,Curtius重排和氨基的脱保护得N-甲基吡啶酮石杉碱甲类似物2。通过类似的途径从中间体2-甲氧基-5-甲氧羰基-7-甲基-11-酮-5,9-甲撑环辛-7-烯并吡啶(14)合成了类似物3。类似物2和3的乙酰胆碱酯酶抑制活性均低于天然石杉碱甲。 相似文献
10.