全文获取类型
收费全文 | 1478篇 |
免费 | 100篇 |
国内免费 | 25篇 |
专业分类
儿科学 | 145篇 |
妇产科学 | 14篇 |
基础医学 | 136篇 |
口腔科学 | 66篇 |
临床医学 | 145篇 |
内科学 | 342篇 |
皮肤病学 | 38篇 |
神经病学 | 25篇 |
特种医学 | 328篇 |
外科学 | 87篇 |
综合类 | 21篇 |
预防医学 | 62篇 |
眼科学 | 16篇 |
药学 | 87篇 |
1篇 | |
中国医学 | 1篇 |
肿瘤学 | 89篇 |
出版年
2023年 | 3篇 |
2022年 | 5篇 |
2021年 | 13篇 |
2020年 | 8篇 |
2019年 | 12篇 |
2018年 | 23篇 |
2017年 | 18篇 |
2016年 | 22篇 |
2015年 | 32篇 |
2014年 | 27篇 |
2013年 | 49篇 |
2012年 | 11篇 |
2011年 | 14篇 |
2010年 | 41篇 |
2009年 | 79篇 |
2008年 | 19篇 |
2007年 | 39篇 |
2006年 | 38篇 |
2005年 | 32篇 |
2004年 | 20篇 |
2003年 | 26篇 |
2002年 | 20篇 |
2001年 | 20篇 |
2000年 | 21篇 |
1999年 | 31篇 |
1998年 | 101篇 |
1997年 | 117篇 |
1996年 | 112篇 |
1995年 | 77篇 |
1994年 | 82篇 |
1993年 | 98篇 |
1992年 | 17篇 |
1991年 | 17篇 |
1990年 | 18篇 |
1989年 | 44篇 |
1988年 | 39篇 |
1987年 | 26篇 |
1986年 | 32篇 |
1985年 | 31篇 |
1984年 | 17篇 |
1983年 | 15篇 |
1982年 | 19篇 |
1981年 | 34篇 |
1980年 | 20篇 |
1979年 | 8篇 |
1978年 | 8篇 |
1977年 | 21篇 |
1976年 | 19篇 |
1975年 | 6篇 |
1970年 | 2篇 |
排序方式: 共有1603条查询结果,搜索用时 31 毫秒
991.
S Mukhtar BE Ayres R Issa MJ Swinn MJA Perry 《Annals of the Royal College of Surgeons of England》2013,95(3):200-206
Introduction
The implementation of enhanced recovery programmes (ERPs) in colorectal surgery has seen improvements in the length of inpatient stay with no increase in complications. We investigated the role of ERP in radical cystectomy at our institution.Methods
Prospective data were collected from 26 consecutive patients prior to the introduction of the ERP and 51 patients who underwent open radical cystectomy within an ERP. Individuals in the ERP cohort did not receive bowel preparation or nasogastric drainage but received preoperative carbohydrate drinks, perioperative epidural analgesia and immediate mobilisation on day 1. Primary outcome measures included duration of intensive care unit (ICU) stay and length of hospital stay. Secondary outcome measures included the time to the passage of flatus and faeces, and time to mobilisation. Other measures that were analysed included operation time and complications.Results
Baseline characteristics for both groups were similar. The median length of hospital stay fell from 11.5 days to 10.4 days and the mean ICU stay dropped from 2.4 days to 1.0 days (p=0.01). Time to removal of nasogastric tube, and time to passage of flatus and faeces were significantly shorter in the ERP group, as was the time to full oral diet. Clavien complication rates and 30-day mortality rates were similar in both groups. There were no readmissions.Conclusions
ERP in radical cystectomy is safe and not associated with any increase in complications or readmissions. It is associated with reductions in ICU stay, and could also reduce length of hospital stay and duration of postoperative ileus. 相似文献992.
WY Ng F Pasutto TM Bardakjian MJ Wilson G Watson A Schneider DA Mackey JR Grigg M Zenker RV Jamieson 《Clinical genetics》2013,83(2):162-168
Ng WY, Pasutto F, Bardakjian TM, Wilson MJ, Watson G, Schneider A, Mackey DA, Grigg JR, Zenker M, Jamieson RV. A puzzle over several decades: eye anomalies with FRAS1 and STRA6 mutations in the same family. Fraser syndrome (FS) and microphthalmia syndromic 9 (MCOPS9) are autosomal recessive conditions with distinct, and some overlapping features affecting the ocular, respiratory and cardiac systems. Mutations in FRAS1 and FREM2 occur in FS, and mutations in STRA6 occur in MCOPS9. We report two sibships, in the same family, where four deceased offspring had ocular, respiratory and cardiac abnormalities. Two sibs with microphthalmia had syndactyly and laryngeal stenosis, suggesting a clinical diagnosis of FS. Our results indicate that they were compound heterozygotes for novel FRAS1 mutations, p.Cys729Phe and p.Leu3813Pro. The other two sibs, first cousins to the first sib pair, had anophthalmia, lung hypoplasia and cardiac anomalies, suggesting a retrospective diagnosis of MCOPS9. Our results indicate compound heterozygous STRA6 mutations, a novel frameshift leading to p.Tyr18* and a p.Thr644Met mutation. The one surviving individual from these sibships is heterozygous for the p.Tyr18*STRA6 mutation and has bilateral ocular colobomata and microphthalmia. This work emphasises the need for careful phenotypic characterisation to determine genes for assessment in ocular syndromic conditions. It also indicates that heterozygous STRA6 mutations may rarely contribute to microphthalmia and coloboma. 相似文献
993.
ABSTRACT: CASE PRESENTATION: This report describes the presentation of three critically ill patients with non-traumatic acute abdominal pain and increased concentrations of the biomarkers C-reactive protein (CRP) and lactate. In these three patients an exploratory laparotomy was carried out. Remarkably, the laparotomy showed no intra-abdominal abnormalities. We discuss the usefulness of these biomarkers in practice and their influence on establishing a diagnose and making a decision to perform an intervention. CONCLUSION: We conclude that biomarkers lactate and CRP in patients with acute abdominal pain should only be used in adjunct to the history and clinical findings, as they are not specific and can be misleading in establishing a diagnosis. In addition, relying on these biomarkers may contribute to more diagnostic examinations and/or unnecessary invasive interventions (for example laparotomy). 相似文献
994.
995.
996.
997.
随着现代制造工艺、电子技术的水平提升,医学模拟技术在功能性和仿真性方面日趋完善,种类也极大丰富,在医学教育中有越来越广泛的应用前景.为了验证在医学教育中应用模拟教育是否可以直接提高医生在实际临床工作中的医疗水平,美国西北大学Feinberg医学院的研究人员进行了一项针对其附属医院的心脏停搏诊疗团队的回顾性病例对照研究. 相似文献
998.
N Schoenmakers Y Sun B Bak ASP van Trotsenburg W Oostdijk P Voshol E Cambridge JK White P le Tissier SNM Gharavy JP Martinez-Barbera WH Stokvis-Brantsma T Vulsma MJ Kempers L Persani I Campi M Bonomi P Beck-Peccoz K Chatterjee 《Lancet》2013
BackgroundCongenital central hypothyroidism occurs either as isolated thyroid-stimulating hormone (TSH) deficiency or in conjunction with other pituitary hormone deficits. Undetected central hypothyroidism is associated with developmental delay in children and adverse cardiometabolic sequelae in adults. Hitherto, mutations in the thyrotropin-releasing hormone receptor gene (TRHR) or the TSHb subunit gene (TSHB) are the only known causes of isolated TSH deficiency.MethodsUsing whole exome and candidate gene sequencing, we have studied 11 unrelated families with males exhibiting isolated TSH deficiency, testicular enlargement, and variably low serum prolactin levels.FindingsWe have identified eight distinct mutations and two whole gene deletions disrupting the X-linked immunoglobulin superfamily member 1 gene (IGSF1) in affected males. IGSF1 encodes a pituitary-enriched plasma membrane glycoprotein; disease-associated mutations block trafficking of IGSF1 from the endoplasmic reticulum to the membrane, consistent with loss-of-protein function. Adult male IGSF1 null mice exhibit central hypothyroidism with decreased pituitary TSH content and circulating T3 levels; TSH secretion in response to TRH is blunted and pituitary TRHR mRNA levels are decreased, suggesting that impaired TRH signalling may provide the basis for hypothyroidism.InterpretationOur observations delineate a novel X-linked syndrome in which loss-of-function mutations in IGSF1 cause central hypothyroidism, testicular enlargement, and variable prolactin deficiency, and identify a previously unsuspected role for IGSF1 in hypothalamic-pituitary control of thyroid and testicular function. Variable biochemical penetrance in these families highlights the importance of genetic ascertainment in this syndrome, so that asymptomatic affected individuals can benefit from early initiation of thyroxine treatment.FundingWellcome Trust and National Institute for Health Research Biomedical Research Centre. 相似文献
999.
Randomized controlled trial comparing the supraglottic airway to use of an endotracheal tube in sinonasal surgery 下载免费PDF全文
Austin S. Adams MD Todd J. Wannemuehler MD Benjamin Hull MA MD Jeffanie Wu BA Rakesh K. Chandra MD Kate VonWahlde MJ Matthew S. Shotwell PhD Stephen Harvey MD Michael Higgins MD MPH Kelly McQueen MD MPH Justin H. Turner MD PhD 《International forum of allergy & rhinology》2018,8(8):877-882
Background
The supraglottic airway (SGA) represents an alternative to endotracheal intubation (endotracheal tube [ETT]) in many types of ambulatory surgery. Adoption of the SGA has progressed slowly in sinonasal surgery due to concerns about airway protection. The purpose of this study was to compare quality of life measures and indices of airway protection between patients undergoing sinonasal surgery who were ventilated via an SGA or ETT.Methods
Patients undergoing outpatient sinonasal surgery were enrolled into a randomized, single‐blind study in which patients would be ventilated with either an SGA or ETT. At the first postoperative visit, a symptom severity and quality of life questionnaire was completed. Additional objective metrics were extracted from the anesthesia record.Results
A total of 102 patients were enrolled; 49 assigned to the SGA group and 53 assigned to the ETT group. No significant differences in swallowing function or cough were identified. SGA patients reported more difficulty returning to a normal diet (p = 0.03) with a trend toward reduced throat pain (p = 0.07) and improved phonation (p = 0.06). No significant difference in perioperative oxygen desaturations, emesis, recovery time, or airway blood penetration were identified.Conclusion
While the use of the SGA results in patient diet modification postoperatively, it may also be associated with a reduction in throat pain and dysphonia. SGA use had no appreciable effect on postanesthesia recovery times, oxygen desaturations, or emesis. Use of the SGA in sinonasal surgery appears to be a safe and reliable option for airway management in selected adult patients undergoing routine ambulatory sinonasal surgery.1000.