全文获取类型
收费全文 | 1259篇 |
免费 | 62篇 |
国内免费 | 147篇 |
专业分类
儿科学 | 59篇 |
妇产科学 | 5篇 |
基础医学 | 81篇 |
口腔科学 | 20篇 |
临床医学 | 181篇 |
内科学 | 335篇 |
皮肤病学 | 43篇 |
神经病学 | 32篇 |
特种医学 | 346篇 |
外科学 | 82篇 |
综合类 | 41篇 |
预防医学 | 47篇 |
眼科学 | 16篇 |
药学 | 123篇 |
1篇 | |
肿瘤学 | 56篇 |
出版年
2019年 | 6篇 |
2018年 | 14篇 |
2017年 | 8篇 |
2016年 | 8篇 |
2015年 | 11篇 |
2014年 | 15篇 |
2013年 | 35篇 |
2012年 | 14篇 |
2011年 | 26篇 |
2010年 | 32篇 |
2009年 | 43篇 |
2008年 | 25篇 |
2007年 | 115篇 |
2006年 | 23篇 |
2005年 | 33篇 |
2004年 | 18篇 |
2003年 | 13篇 |
2002年 | 25篇 |
2001年 | 24篇 |
2000年 | 21篇 |
1999年 | 28篇 |
1998年 | 84篇 |
1997年 | 80篇 |
1996年 | 72篇 |
1995年 | 66篇 |
1994年 | 47篇 |
1993年 | 55篇 |
1992年 | 19篇 |
1991年 | 19篇 |
1990年 | 20篇 |
1989年 | 52篇 |
1988年 | 35篇 |
1987年 | 37篇 |
1986年 | 39篇 |
1985年 | 36篇 |
1984年 | 24篇 |
1983年 | 25篇 |
1982年 | 30篇 |
1981年 | 21篇 |
1980年 | 20篇 |
1979年 | 15篇 |
1978年 | 9篇 |
1977年 | 22篇 |
1976年 | 29篇 |
1975年 | 17篇 |
1974年 | 6篇 |
1973年 | 8篇 |
1972年 | 6篇 |
1971年 | 7篇 |
1966年 | 7篇 |
排序方式: 共有1468条查询结果,搜索用时 23 毫秒
21.
A 15 year old boy with autoimmune polyendocrinopathy-candidosis-ectodermal dystrophy syndrome suffered recurrent episodes of severe intractable diarrhoea, steatorrhoea, and hypocalcaemia. The only treatment modality, which controlled the malabsorption syndrome, was immunosuppression with intravenous high dose methylprednisolone and oral methotrexate maintenance therapy. 相似文献
22.
Wang WS; Hsieh RK; Chiou TJ; Liu JH; Fan FS; Yen CC; Tung SL; Chen PM 《Japanese journal of clinical oncology》1998,28(9):551-554
A 54-year-old man was treated with weekly 24-h infusion of high-dose
5-fluorouracil (2600 mg/m2) and leucovorin (100 mg/m2) for metastatic colon
cancer. At first, he tolerated the treatment well and no significant
toxicity was identified. After a total of eight courses of treatment, a
stable disease was observed, but mild shortness of breath was found on
occasion. The patient had no previous history of cardiac disease and the
heart performance assessed by left ventricular ejection fraction before
treatment was normal. Unfortunately, acute pulmonary edema with lethal
cardiogenic shock occurred during the ninth course of treatment, in spite
of intensive medical treatment. The chest X-ray showed extreme
cardiomegaly. Repeated assessment of his heart function by echocardiogram
and ventricular ejection fraction revealed a very poor cardiac performance.
Toxic cardiogenic shock during weekly 24-h infusion of high-dose
5-fluorouracil and leucovorin is extremely rare. To the best of our
knowledge, no case has been reported in the English literature. We report a
case and the relevant literature about the incidence, clinical picture and
possible pathophysiology on 5-fluorouracil-related cardioxicity is
reviewed.
相似文献
23.
Effect of fibrin glue on lymphatic drainage after modified radical mastectomy: a prospective randomized trial 总被引:4,自引:0,他引:4
Fibrin as a tissue sealant has been used since the turn of the century for hemostasis. The development of cryoprecipitate and the resultant availability of higher concentrations of fibrinogen have led to a resurgence of interest in this material. Fibrin glue has since been shown to be effective for numerous applications throughout the field of surgery. Animal studies have shown fibrin glue to be effective at reducing drain output after mastectomy. Human studies, however, have been equivocal. Our objectives were to determine whether the use of fibrin glue would decrease lymphatic drainage after modified radical mastectomy and subsequently reduce time to drain removal. A prospective randomized trial was conducted consisting of 27 women. All women received modified radical mastectomy. At the completion of the mastectomy they were randomized to receive either standard closure or the application of fibrin glue before standard closure. Patients were then monitored for daily drain output, time to drain removal, and wound complications. A total of 14 women received fibrin glue and 13 received no glue. Those patients receiving fibrin glue had a significantly higher average drain output than patients who did not receive glue (1308 vs 754 cm3; P = 0.012). Time to drain removal was also increased by 4 days, although this did not reach statistical significance. The overall complication rate was higher for the fibrin glue group, although again, this did not reach significance. The application of fibrin glue significantly increased drain total drain output after modified radical mastectomy. Time to drain removal was increased as was the complication rate. On the basis of these data fibrin glue cannot be recommended for routine use in modified radical mastectomy. 相似文献
24.
Marcel JH Aries Adnan Aslan Jan Willem J Elting Roy E Stewart Jan G Zijlstra Jacques De Keyser Patrick CAJ Vroomen 《Journal of clinical nursing》2012,21(13-14):1825-1830
Background. Routine lateral turning of patients has become an accepted standard of care to prevent complications of immobility. The haemodynamic and oxygenation effects for patients in both lateral positions (45°) are still a matter of debate. We aimed to study the effect of these positions on blood pressure, heart rate and oxygenation in a general intensive care population. Design. Observational study. Method. Twenty stable intensive care unit patients had intra‐arterial blood pressure recordings in the supine and lateral positions with the correction of hydrostatic height compared with a fixed reference point (phlebostatic level). A multilevel model was used to analyse the data. Results. Mean arterial pressure readings in the lateral positions were, on average, 5 mmHg higher than in the supine position (p < 0·001). There were no significant differences between mean arterial pressure recordings in the left and right lateral position (p = 1·0). No important differences in oxygenation and heart rate were observed. After correction for covariates, the effects persisted. Conclusion. Our study demonstrated an increase, albeit small, in blood pressure in the lateral positions. No major differences between the left and right lateral position were found. No important differences in oxygenation and heart rate were observed. Relevance to clinical practice. Turning haemodynamically stable patients in the intensive care unit has no important effects on blood pressure measurements when continuous hydrostatic height correction is applied. 相似文献
25.
26.
SB Cho JH Kim S Cho JM Park YK Park SH Oh 《Journal of the European Academy of Dermatology and Venereology》2011,25(1):64-67
Background The clinical characteristics of vitiligo in children and adolescents with an emphasis on thyroid dysfunction have only been reported in a few studies. Objective The purpose of this study was to examine the characteristics of children and adolescents with vitiligo and compare the incidence of thyroid dysfunction between them and controls without vitiligo at the same age. Methods A retrospective analysis of 324 Korean children and adolescents with vitiligo was performed. The results of thyroid function screening tests in them (n = 254) were compared with controls (n = 122). Results Of the total 324 children and adolescents with vitiligo, vitiligo vulgaris was the most common type (42.3%) and the most commonly involved site was the face (54.6%). A total of 15 of 254 (5.9%) patients screened for thyroid function were diagnosed with thyroid disease (four had Hashimoto’s thyroiditis; two, Graves’ disease; seven, subclinical hypothyroidism; and two, subclinical hyperthyroidism). None of the 50 patients with segmental vitiligo showed any thyroid dysfunction (P = 0.047). There was no significant difference in the incidence of thyroid disease between children and adolescents with vitiligo and the control group, in which seven of 122 (5.7%) showed thyroid dysfunction. Conclusion In this study, we demonstrated the characteristics of children and adolescents with vitiligo and also observed no significant difference in the incidence of thyroid disease between children and adolescents with vitiligo and the control group. 相似文献
27.
Kory Floyd Alice E. Veksler Bree McEwan Colin Hesse Justin P. Boren Dana R. Dinsmore 《Health communication》2017,32(8):1039-1042
Loneliness has been shown to have direct effects on one’s personal well-being. Specifically, a greater feeling of loneliness is associated with negative mental health outcomes, negative health behaviors, and an increased likelihood of premature mortality. Using the neuroendocrine hypothesis, we expected social inclusion to predict decreases in both blood glucose levels and low-density lipoproteins (LDLs) and increases in high-density lipoproteins (HDLs). Fifty-two healthy adults provided self-report data for social inclusion and blood samples for hematological tests. Results indicated that higher social inclusion predicted lower levels of blood glucose and LDL, but had no effect on HDL. Implications for theory and practice are discussed. 相似文献
28.
Familial protein S deficiency with a variant protein S molecule in plasma and platelets 总被引:3,自引:0,他引:3
A protein S deficient family presenting a variant protein S molecule in plasma and platelets is described. The propositus, age 20, and two brothers suffered from venous thrombotic disease. The propositus, the only family member studied while taking oral anticoagulants, had a protein S antigen (ag) level of 17% and undetectable activity. As demonstrated by immunoblotting both the propositus and one clinically affected brother (42% ag, 7% activity) presented variant protein S molecules of 65,000 molecular weight (mol wt) while the other clinically affected brother (64% ag, 11% activity) had only protein S with normal electrophoretic mobility of 70,000 mol wt. The mother had normal protein S levels (93% ag, 100% activity) but had both normal and variant protein S molecules and based on her functional protein S data a normal anticoagulant activity of the variant molecule is suggested. One asymptomatic but protein S deficient sister (68% ag, 9% activity) as well as the asymptomatic protein S deficient father (59% ag, 10% activity) had only protein S molecules of 70,000 mol wt. The variant protein S bound to C4b-binding protein in plasma, and differed from normal protein S in carbohydrate content. Platelets of each family member contained the same immunoblotting pattern of normal and variant protein S forms as found in plasma, consistent with the hypothesis that protein S gene expression involves codominant expression of two alleles that is similar in cells that control the synthesis of both platelet and plasma forms of protein S. 相似文献
29.
de Haas M; Kerst JM; van der Schoot CE; Calafat J; Hack CE; Nuijens JH; Roos D; van Oers RH; von dem Borne AE 《Blood》1994,84(11):3885-3894
In four healthy volunteers, we analyzed in detail the immediate in vivo effects on circulating neutrophils of subcutaneous administration of 300 micrograms of granulocyte colony-stimulating factor (G-CSF). Neutrophil activation was assessed by measurement of degranulation. Mobilization of secretory vesicles was shown by a decrease in leukocyte alkaline phosphatase content of the circulating neutrophils. Furthermore, shortly postinjection, Fc gamma RIII was found to be upregulated from an intracellular pool that we identified by immunoelectron microscopy as secretory vesicles. Intravascular release of specific granules was shown by increased plasma levels of lactoferrin and by upregulation of the expression of CD66b and CD11b on circulating neutrophils. Moreover, measurement of fourfold elevated plasma levels of elastase, bound to its physiologic inhibitor alpha 1- antitrypsin, indicated mobilization of azurophil granules. However, no expression of CD63, a marker of azurophil granules, was observed on circulating neutrophils. G-CSF--induced mobilization of secretory vesicles and specific granules could be mimicked in whole blood cultures in vitro, in contrast to release of azurophil granules. Therefore, we postulate that the most activated neutrophils leave the circulation, as observed shortly postinjection, and undergo subsequent stimulation in the endothelial microenvironment, resulting in mobilization of azurophil granules. Our data demonstrate that G-CSF should be regarded as a potent immediate activator of neutrophils in vivo. 相似文献
30.
B D Clarkson T Gee Z A Arlin R Mertelsmann S J Kempin R E Dinsmore R J O'Reilly M Andreeff E Berman C Little 《Critical reviews in oncology/hematology》1986,4(3):221-248
The results of treatment of 629 previously untreated adults with acute leukemia at Memorial Hospital are reviewed. During the past 14 years, 135 adults (greater than 15 years) with acute lymphoblastic leukemia (ALL) have been treated with one of three successive multidrug-intensive treatment protocols (L2, L10/10M, and L17/17M), each calling for 2.5 to 3 years of systemic chemotherapy and prophylactic intrathecal methotrexate without cranial irradiation. The complete remission (CR) rates were L2 (n = 22) = 77%; L10/10M (n = 69) = 86%; L17/17M (n = 44) = 77%. The median durations of survival and remission were, respectively, L2 = 33 and 30 months; L10/10M = 62 months and not reached; and L17/17M = not reached. Almost all relapses occurred within the first 3 years while still continuing treatment, and there were only rate late relapses after stopping treatment. It appears that approximately half of the patients may have been cured with the latest two protocols. During the last 17 years, 494 adults aged 15 to greater than 70 with acute nonlymphoblastic leukemia (ANLL) were treated with one of five successive multiple drug treatment protocols of varying intensity (arabinosylcytosine + 6-thioguanine [n = 36]; L6 [n = 101]; L12 [n = 104]; L14/14M [n = 121]; and L16/16M [n = 132]). Patients with myelodysplastic syndromes generally were not treated until they developed acute leukemia, but were then entered and included in the results. Secondary leukemias following treatment of other neoplastic diseases were not included. The complete remission rates were fairly constant between 47 and 64% and the median durations of remissions were between 9 and 21 months. The intensive treatment L14 and L16 protocols were associated with more early deaths and did not result in a significantly improved remission incidence or duration or survival. With all protocols, the majority of relapses occurred within the first 2 years, but relapses continued to occur at a decreasing rate for 4 years and occasionally even later. Whereas a small fraction (approximately 10 to 15%) of adults with ANLL are now apparently being cured with combination chemotherapy, despite intensive efforts there has been little improvement during the last decade and more selective and effective forms of treatment are urgently needed. 相似文献