全文获取类型
收费全文 | 1362篇 |
免费 | 51篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 59篇 |
儿科学 | 75篇 |
妇产科学 | 42篇 |
基础医学 | 173篇 |
口腔科学 | 50篇 |
临床医学 | 80篇 |
内科学 | 263篇 |
皮肤病学 | 16篇 |
神经病学 | 40篇 |
特种医学 | 100篇 |
外科学 | 137篇 |
综合类 | 124篇 |
一般理论 | 35篇 |
预防医学 | 44篇 |
眼科学 | 17篇 |
药学 | 57篇 |
肿瘤学 | 104篇 |
出版年
2021年 | 36篇 |
2020年 | 7篇 |
2019年 | 9篇 |
2018年 | 12篇 |
2016年 | 12篇 |
2015年 | 17篇 |
2014年 | 16篇 |
2013年 | 39篇 |
2012年 | 45篇 |
2011年 | 41篇 |
2010年 | 43篇 |
2009年 | 41篇 |
2008年 | 56篇 |
2007年 | 41篇 |
2006年 | 52篇 |
2005年 | 41篇 |
2004年 | 45篇 |
2003年 | 46篇 |
2002年 | 35篇 |
2001年 | 56篇 |
2000年 | 36篇 |
1999年 | 35篇 |
1998年 | 48篇 |
1997年 | 44篇 |
1996年 | 36篇 |
1995年 | 27篇 |
1994年 | 41篇 |
1993年 | 18篇 |
1992年 | 18篇 |
1991年 | 23篇 |
1990年 | 30篇 |
1989年 | 31篇 |
1988年 | 25篇 |
1987年 | 31篇 |
1986年 | 19篇 |
1985年 | 25篇 |
1984年 | 16篇 |
1983年 | 12篇 |
1982年 | 8篇 |
1981年 | 9篇 |
1980年 | 11篇 |
1979年 | 9篇 |
1978年 | 9篇 |
1977年 | 12篇 |
1975年 | 18篇 |
1973年 | 12篇 |
1969年 | 7篇 |
1961年 | 7篇 |
1949年 | 7篇 |
1908年 | 6篇 |
排序方式: 共有1416条查询结果,搜索用时 15 毫秒
1.
2.
3.
R. Lindemann 《European journal of pediatrics》1998,157(12):1012-1013
Fentanyl is in many neonatal intensive care units the sedative of choice. One side-effect is, however, the possibility of
muscle and/or chest wall rigidity. A pregnant woman with a critical pulmonary valve stenosis had a balloon dilatation at 26
weeks of gestation. She was put on propranolol, but went into a severe cardiac failure. In week 31, she developed pregnancy
induced hypertension. Periodically absent diastolic flow in the umbilical cord was demonstrated. A Caesarean section was performed
using fentanyl as analgesia. A boy weighing 1440 g, had a 1 min Apgar score of 3 without respiratory movements. Mask ventilation
was tried, but chest wall expansion was not achieved despite using high pressures. He was intubated and positive pressure
ventilation attempted, with the same result. Despite the use of high pressures up to 60–70 cm H2O, no chest movement could be achieved. An intravenous line was established in order to give naloxone and pancuronium. Just
before the drugs were given, chest wall movements were achieved and the heart rate normalized.
Conclusion This is the first report on chest wall rigidity in a neonate after administration of fentanyl to the mother during Caesarean
section.
Received: 15 August 1997 and in revised form 30 January 1998 / Accepted 3 February 1998 相似文献
4.
5.
6.
Tilman Keck Kerstin Wiesmiller Joerg Lindemann Ajnacska Rozsasi 《European archives of oto-rhino-laryngology》2006,263(10):910-916
Acoustic rhinometry is one method to evaluate nasal geometry by an acoustic reflection technique. The aim of this study was to investigate the changes in acoustic rhinometry after nasal provocation in patients with exclusively perennial allergic rhinitis. In 19 patients, acoustic rhinometry and active anterior rhinomanometry were performed before and after nasal provocation test. There was a statistically significant nasal flow reduction measured by active anterior rhinomanometry after nasal provocation (p < 0.05) and a median symptom score of four points, both indicating a positive response to nasal provocation. On the other hand, there was no statistically significant change in the values of acoustic rhinometry after nasal provocation (p > 0.05). In patients with exclusively perennial allergic rhinitis, acoustic rhinometry does not seem to significantly change after nasal provocation. In contrast, active anterior rhinomanometry values decreased significantly after nasal provocation. The presented results indicate that acoustic rhinometry does not seem to be a diagnostic method superior to active anterior rhinomanometry in this context. 相似文献
7.
Boerhaave’s syndrome: Primary repair vs. esophageal resection—Case reports and meta-analysis of the literature 总被引:3,自引:0,他引:3
Otto Kollmar M.D. Werner Lindemann M.D. Sven Richter M.D. Ingo Steffen M.D. Georg Pistorius M.D. Martin K. Schilling M.D. 《Journal of gastrointestinal surgery》2003,7(6):726-734
Boerhaave’s syndrome is a life-threatening disease with a high mortality. With regard to the heterogeneity of treatment strategies,
no comparative studies exist and recommendations remain controversial. Seventeen cases of Boerhaave’s syndrome operated on
between 1989 and 2000 at our hospital were reviewed retrospectively to compare the time period between perforation and diagnosis,
and the morbidity and mortality among the different treatment options. In addition, we conducted a meta-analysis of the literature
including all series containing five or more patients and compared the findings with our own data. Our patients with a perforation
history of less than 12 hours showed significantly fewer signs of sepsis compared to patients with a history of more than
12 hours. In a comparison of patients with primary repair vs. patients treated with esophageal resection or an exclusion operation,
no differences were found. In the literature, patients with a long period of perforation (more than 24 hours) were treated
more often with an esophageal resection than patients with primary repair. In cases of Boerhaave’s syndrome, primary suturing
of the esophageal perforation should be reserved only for those patients presenting within 12 hours after perforation. In
all other cases, depending on the extent of the tissue damage, a two-stage esophageal resection with cervical esophagostomy
and gastrostomy is recommended as the safest treatment. 相似文献
8.
Hintergrund. In der vorgestellten Studie sollte untersucht werden, inwiefern es infolge funktionell-?sthetischer Eingriffe an der Nase zu Ver?nderungen der Riechschwelle kommen kann und ob diese Ver?nderungen von Patienten subjektiv auch wahrgenommen werden k?nnen. 相似文献
9.
HERMAN TOURNAYE RONNY JANSSENS PAUL DEVROEY RK VAN STEIRTEGHEM 《International journal of andrology》1994,17(1):1-8
In order to evaluate the effects of pentoxifylline on sperm motility and longevity, a controlled in-vitro study was conducted on normozoospermic donor semen samples using the Cellsoft automated system for sperm motility analysis. After incubation and selection, pentoxifylline was found to improve the recovery of spermatozoa and to increase their velocity. In the subgroup of progressively motile spermatozoa, curvilinear velocity was also enhanced. It is concluded that pentoxifylline has an effect on the vigour, but not on the pattern, of sperm motion. Pentoxifylline did not improve the motility characteristics of senescent spermatozoa in normozoospermic sperm samples. Sperm survival, as shown by supra-vital staining, and motility longevity both decreased with time after pentoxifylline treatment. 相似文献
10.