全文获取类型
收费全文 | 1857篇 |
免费 | 303篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 86篇 |
妇产科学 | 290篇 |
基础医学 | 92篇 |
口腔科学 | 27篇 |
临床医学 | 851篇 |
内科学 | 181篇 |
皮肤病学 | 51篇 |
神经病学 | 16篇 |
特种医学 | 236篇 |
外科学 | 67篇 |
综合类 | 59篇 |
预防医学 | 109篇 |
眼科学 | 6篇 |
药学 | 44篇 |
肿瘤学 | 52篇 |
出版年
2024年 | 4篇 |
2023年 | 43篇 |
2021年 | 12篇 |
2020年 | 36篇 |
2019年 | 20篇 |
2018年 | 58篇 |
2017年 | 90篇 |
2016年 | 77篇 |
2015年 | 99篇 |
2014年 | 103篇 |
2013年 | 99篇 |
2012年 | 43篇 |
2011年 | 61篇 |
2010年 | 103篇 |
2009年 | 104篇 |
2008年 | 42篇 |
2007年 | 50篇 |
2006年 | 44篇 |
2005年 | 28篇 |
2004年 | 18篇 |
2003年 | 34篇 |
2002年 | 23篇 |
2001年 | 41篇 |
2000年 | 15篇 |
1999年 | 50篇 |
1998年 | 94篇 |
1997年 | 109篇 |
1996年 | 106篇 |
1995年 | 93篇 |
1994年 | 64篇 |
1993年 | 48篇 |
1992年 | 26篇 |
1991年 | 24篇 |
1990年 | 12篇 |
1989年 | 32篇 |
1988年 | 31篇 |
1987年 | 21篇 |
1986年 | 26篇 |
1985年 | 29篇 |
1984年 | 15篇 |
1983年 | 15篇 |
1982年 | 18篇 |
1981年 | 14篇 |
1980年 | 15篇 |
1979年 | 5篇 |
1978年 | 17篇 |
1977年 | 18篇 |
1976年 | 15篇 |
1975年 | 14篇 |
1965年 | 2篇 |
排序方式: 共有2169条查询结果,搜索用时 0 毫秒
81.
AG Eller TF Porter P Soisson RM Silver 《BJOG : an international journal of obstetrics and gynaecology》2009,116(5):648-654
Objective To determine which interventions for managing placenta accreta were associated with reduced maternal morbidity.
Design Retrospective cohort study.
Setting Two tertiary care teaching hospitals in Utah.
Population All identified cases of placenta accreta from 1996 to 2008.
Methods Cases of placenta accreta were identified using standard ICD-9 codes for placenta accreta, placenta praevia, and caesarean hysterectomy. Medical records were then abstracted for maternal medical history, hospital course, and maternal and neonatal outcomes. Maternal and neonatal complications were compared according to antenatal suspicion of accreta, indications for delivery, preoperative preparation, attempts at placental removal before hysterectomy, and hypogastric artery ligation.
Main outcome measures Early morbidity (prolonged maternal intensive care unit admission, large volume of blood transfusion, coagulopathy, ureteral injury, or early re-operation) and late morbidity (intra-abdominal infection, hospital re-admission, or need for delayed re-operation).
Results Seventy-six cases of placenta accreta were identified. When accreta was suspected, scheduled caesarean hysterectomy without attempting placental removal was associated with a significantly reduced rate of early morbidity compared with cases in which placental removal was attempted (67 versus 36%, P = 0.038). Women with preoperative bilateral ureteric stents had a lower incidence of early morbidity compared with women without stents (18 versus 55%, P = 0.018). Hypogastric artery ligation did not reduce maternal morbidity.
Conclusions Scheduled caesarean hysterectomy with preoperative ureteric stent placement and avoiding attempted placental removal are associated with reduced maternal morbidity in women with suspected placenta accreta. 相似文献
Design Retrospective cohort study.
Setting Two tertiary care teaching hospitals in Utah.
Population All identified cases of placenta accreta from 1996 to 2008.
Methods Cases of placenta accreta were identified using standard ICD-9 codes for placenta accreta, placenta praevia, and caesarean hysterectomy. Medical records were then abstracted for maternal medical history, hospital course, and maternal and neonatal outcomes. Maternal and neonatal complications were compared according to antenatal suspicion of accreta, indications for delivery, preoperative preparation, attempts at placental removal before hysterectomy, and hypogastric artery ligation.
Main outcome measures Early morbidity (prolonged maternal intensive care unit admission, large volume of blood transfusion, coagulopathy, ureteral injury, or early re-operation) and late morbidity (intra-abdominal infection, hospital re-admission, or need for delayed re-operation).
Results Seventy-six cases of placenta accreta were identified. When accreta was suspected, scheduled caesarean hysterectomy without attempting placental removal was associated with a significantly reduced rate of early morbidity compared with cases in which placental removal was attempted (67 versus 36%, P = 0.038). Women with preoperative bilateral ureteric stents had a lower incidence of early morbidity compared with women without stents (18 versus 55%, P = 0.018). Hypogastric artery ligation did not reduce maternal morbidity.
Conclusions Scheduled caesarean hysterectomy with preoperative ureteric stent placement and avoiding attempted placental removal are associated with reduced maternal morbidity in women with suspected placenta accreta. 相似文献
82.
83.
Sarah Lake MN RN Cheryle Moss PhD RN Jan Duke PhD RN RM 《International journal of nursing practice》2009,15(5):376-388
Every day in clinical settings, nurses practise in complex and dynamic situations. Nurses work to achieve emergent order in these situations through nursing prioritization of the patient need for care. As direct research on nursing prioritization had not been reported, a study, using critical realism as method, was designed to discern the profession's embedded understanding from within the clinical decision-making literature. The research synthesizes a tacit knowledge on nursing prioritization of the patient need for care from key international literature (from 1966 to 2003). Nursing prioritization was discerned in both education and practice literatures; interrelationships between these and theoretical approaches were also identified. Nursing prioritization of the patient need for care was revealed both as a non-sequential decision-making process throughout unfolding patient situations and as an advanced skill of nursing practice. Increasing confidence with this skill is the hallmark of developing expertise. 相似文献
84.
Depression recognition and capacity for self‐report among ethnically diverse nursing homes residents: Evidence of disparities in screening 下载免费PDF全文
85.
86.
An analysis of nursing students’ decision‐making in teams during simulations of acute patient deterioration 下载免费PDF全文
87.
88.
Jurriaan P Oudhoff Danielle RM Timmermans Martin Rietberg Dirk L Knol Gerrit van der Wal 《BMC health services research》2007,7(1):32
Background
Problematic waiting lists in public health care threaten the equity and timeliness of care provision in several countries. This study assesses different stakeholders' views on the acceptability of waiting lists in health care, their preferences for priority care of patients, and their judgements on acceptable waiting times for surgical patients. 相似文献89.
目的:评估人工流产(指手术流产)对乳腺癌危险性的可能影响。方法:研究在上海267040例妇女的一项乳房自我检查随机试验的队列人群中进行,由队列研究和巢式病例对照研究两部分组成。结果:依据基线调查表采集的资料分析,人工流产不增加乳腺癌危险性。调整潜在的混淆因素后,OR=1.06(95%CI:0.91~1.25)。人工流产次数增加无危险性趋势增加。从更详细的652例乳腺癌病例和694例对照资料分析,得出相似的结果。人工流产发生在首次生育后不增加危险性;少数妇女在首次生育前人工流产以及妊娠13周后人工流产,虽然被观察到危险性有增加,但无显著性统计学意义。结论:在中国,人工流产不是乳腺癌发生的重要原因。 相似文献
90.