全文获取类型
收费全文 | 2733篇 |
免费 | 128篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 82篇 |
儿科学 | 183篇 |
妇产科学 | 167篇 |
基础医学 | 184篇 |
口腔科学 | 164篇 |
临床医学 | 175篇 |
内科学 | 484篇 |
皮肤病学 | 58篇 |
神经病学 | 252篇 |
特种医学 | 90篇 |
外科学 | 734篇 |
综合类 | 21篇 |
一般理论 | 1篇 |
预防医学 | 56篇 |
眼科学 | 64篇 |
药学 | 79篇 |
肿瘤学 | 89篇 |
出版年
2024年 | 3篇 |
2023年 | 32篇 |
2022年 | 65篇 |
2021年 | 112篇 |
2020年 | 78篇 |
2019年 | 91篇 |
2018年 | 110篇 |
2017年 | 95篇 |
2016年 | 129篇 |
2015年 | 144篇 |
2014年 | 136篇 |
2013年 | 165篇 |
2012年 | 220篇 |
2011年 | 220篇 |
2010年 | 119篇 |
2009年 | 107篇 |
2008年 | 174篇 |
2007年 | 185篇 |
2006年 | 160篇 |
2005年 | 127篇 |
2004年 | 103篇 |
2003年 | 70篇 |
2002年 | 84篇 |
2001年 | 27篇 |
2000年 | 30篇 |
1999年 | 19篇 |
1998年 | 10篇 |
1997年 | 11篇 |
1996年 | 6篇 |
1995年 | 14篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 8篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1984年 | 2篇 |
排序方式: 共有2883条查询结果,搜索用时 15 毫秒
41.
Persistent left superior vena cava accompanying congenital heart disease in children: Experience of a tertiary care center 下载免费PDF全文
42.
Fatih Akbulut Onur Kucuktopcu Emre Kandemir Erkan Sonmezay Abdulmuttalip Simsek Faruk Ozgor 《Renal failure》2016,38(1):163-167
To compare the outcomes of flexible ureterorenoscopy (F-URS) and mini-percutaneous nephrolithotomy (mini-PNL) in the treatment of lower calyceal stones smaller than 2?cm. Patients who underwent F-URS and mini-PNL for the treatment of lower calyceal stones smaller than 2?cm between March 2009 and December 2014 were retrospectively evaluated. Ninety-four patients were divided into two groups by treatment modality: F-URS (Group 1: 63 patients) and mini-PNL (Group 2: 31 patients). All patients were preoperatively diagnosed with intravenous pyelography or computed tomography. Success rates for F-URS and mini-PNL at postoperative first month were 85.7% and 90.3%, respectively. Operation time, fluoroscopy time, and hospitalization time for F-URS and mini-PNL patients were 44.40?min, 2.9?min, 22.4?h, and 91.9?min, 6.4?min, and 63.8?h, respectively. All three parameters were significantly shorter among the F-URS group (p?0.001). Postoperative hemoglobin drop was significantly lower in F-URS group compared to?mini-PNL group (0.39?mg/dL vs. 1.15?mg/dL, p?=?0.001). A comparison of complications according to the Clavien classification demonstrated significant differences between the groups (p?=?0.001). More patients in the F-URS groups require antibiotics due to urinary tract infection, and more patients in the?mini-PNL group required ureteral double J catheter insertion under general anesthesia. Although both F-URS and?mini-PNL have similar success rates for the treatment of lower calyceal stones, F-URS appears to be more favorable due to shorter fluoroscopy and hospitalization times; and lower hemoglobin drops. Multicenter and studies using higher patient volumes are needed to confirm these findings. 相似文献
43.
PURPOSEAlthough imaging-guided core needle breast biopsy is a minimally invasive diagnostic procedure, it is reported that patients may experience anxiety and pain. Interventions to reduce anxiety are important for high quality health services during imaging-guided core needle breast biopsy. The purpose of this study was to evaluate the effect of music intervention on anxiety and pain levels of patients undergoing ultrasound-guided core needle breast biopsy.METHODSIn a prospective randomized controlled design, patients who were referred for ultrasound-guided core needle breast biopsy were invited to the study and randomized into the intervention group who received standard care with classical music intervention before and during the biopsy procedure, and the control group who received only standard care. Both groups received local anesthesia. The Spielberger State-Trait Anxiety Inventory and the Visual Analogue Scale (VAS) were used for measuring anxiety and pain levels after the procedure. One-way multivariate analysis of variance test was used to find the effect of music intervention on patient anxiety and pain.RESULTSThere were 31 patients (48.4%) in the intervention group and 33 (51.6%) in the control group; the groups were similar in terms of sociodemographic characteristics and general (trait) anxiety levels. The patients in the music intervention group had significantly lower state anxiety score than the control group (p = 0.008) with a mean difference of 3.8 (95% CI, 1.0–6.6). The mean difference of VAS pain score was 6.0 (95% CI, 2.2–14.2), which not statistically significant between groups (p = 0.150). There was no significant correlation between the VAS and the state anxiety scale (r = 0.003, p = 0.980).CONCLUSIONMusic reduced anxiety, but not pain during ultrasound-guided core needle breast biopsy. These results have implications especially for low and middle-income countries where low-cost and easily implemented interventions are needed to address patient anxiety during breast biopsy procedures.Imaging-guided core needle breast biopsy is a safe and cost-effective procedure that is essential for managing suspicious breast lesions (1, 2). Although imaging-guided core needle breast biopsy is a minimally invasive procedure, patients may experience anxiety and distress (3). Reducing anxiety during biopsy procedures is important as higher anxiety during different biopsy procedures was found to be associated with higher pain (4, 5), and reducing anxiety may reduce the pain and increase the patient comfort. Furthermore, the regulation of anxiety during breast biopsy plays an important role in adherence to follow-up (6).Music regulates emotions by affecting the expression of opiate, nitric oxide, cytokine, and hormone levels through neuroendocrinological pathways (7). Music has been shown to reduce anxiety and pain levels in different medical procedures like chemotherapy, chest tube removal, endoscopy, colonoscopy, magnetic resonance imaging, fine needle aspiration biopsy, transrectal ultrasound-guided prostate biopsy, bone marrow biopsy, surgery, labor and caesarian section (8–11). A systematic review recommended that music intervention should be applied to clinical management of biopsy patients (12). However, there is scarce research on the effect of music on ultrasound-guided core needle breast biopsy patients’ anxiety and pain levels (13–15). Two of these trials showed that music reduced the anxiety levels of breast biopsy patients (13, 15), whereas one study reported that music intervention was not effective (14). All of the mentioned studies are from high income countries and have inconsistent results. There is no study on the effect of music intervention on anxiety and pain levels of ultrasound-guided core needle breast biopsy patients from low- and middle-income countries where there may be cultural and socioeconomical differences that may affect the patients’ response to music interventions. Furthermore, these countries are in need of low-cost interventions to increase the quality of life of patients.This study investigated whether or not classical music changed patient anxiety and/or pain levels of patients undergoing ultrasound-guided core needle breast biopsy in Turkey. It was hypothesized that music intervention will decrease the patients’ anxiety and pain levels. 相似文献
44.
45.
Muge Gulen Yeliz Simsek Emre Oner Salim Satar 《The American journal of emergency medicine》2018,36(6):1126.e5-1126.e6
Alpha lipoic acid (ALA), which is an anti-oxidant acting as a scavenger for reactive oxygen species, is especially used to improve glycemic control and prevent polyneuropathies associated with diabetes mellitus. ALA is considered to be a safe drug and intoxication with ALA is extremely rare. However, this paper reports a 38-year-old young woman who was admitted to the emergency department after she had ingested ten pills of 600 mg ALA belonging to her diabetic parent, which led to delirium, metabolic acidosis, thrombocytopenia, and rhabdomyolysis. To the best of our knowledge, there are only four cases of ALA intoxication reported in the literature and all were observed in children. This report aims to present the first case of ALA related intoxication worldwide in an adult patient. 相似文献
46.
Koray Ak Selim Isbir Alper Kepez Kemal Turkoz Emre Elci Sinan Arsan 《Texas Heart Institute journal / from the Texas Heart Institute of St. Luke's Episcopal Hospital, Texas Children's Hospital》2014,41(2):231-233
We present the case of a 58-year-old woman who had large lipomatous hypertrophy of the interventricular septum, a condition that is reported very infrequently. Preoperative cardiac magnetic resonance images revealed an inhomogeneous, infiltrating mass that was suppressed in fat-suppression mode. The extensive mass was causing right ventricular dysfunction, so we excised it through a right ventricular approach. The findings on histologic analysis of the mass were consistent with lipomatous hypertrophy. The patient died of septic shock on the 28th postoperative day. In addition to the patient''s case, we discuss the characteristics and diagnosis of this rare entity. 相似文献
47.
Karadeniz Çakmak O. Tascilar I. Tekin B. H. Ucan A.U. Emre B.D. Gun 《Acta chirurgica Belgica》2013,113(6):725-731
Introduction : Mounting evidence suggests that impaired wound healing is a well-defined consequence in obstructive jaundice and, as redox-regulated processes are relevant to wound healing, it is not unreasonable to suppose that oxidative stress associated with lipid peroxidation in cholestasis might be a systemic phenomenon probably comprising all tissues and organs, including wounds. The aim of the present investigation was to analyse the lipid peroxidation status of surgical wounds, in terms of oxidized low-density-lipoprotein (oxLDL) accumulation in experimental obstructive jaundice.Methods : Sixteen Wistar-Albino rats weighing 200–230 gr were randomly divided into two groups. Group I (n = 8) was designed as the prolonged obstructive jaundice group and was subjected to bile duct ligation. Group II (Sham-control, n = 8) rats underwent laparotomy alone and bile duct was just dissected from the surrounding tissue. Histopathological evaluation, immunohistochemical screening and immunoflourescent staining of the surgical wound was conducted to the bile-duct ligated rats and control group on the 21st postoperative day.Results : Wound healing was found to be impaired in jaundiced rats histopathologically. When compared with the control group, significant positive oxLDL staining and intracellular accumulation of TNF-a, IL-2 and iL-6 was detected in the wound sections of the prolonged obstructive jaundice group.Conclusion : Our present data is the first in the literature, indicating significant oxLDL accumulation in surgical wounds of cholestatic rats, which might be one of the results of systemic oxidative stress leading to deficient healing capacity as a consequence of persistent inflammation. 相似文献
48.
Duygu Emine Ersozlu Bozkirli Ilknur Kozanoglu Emre Bozkirli Eftal Yucel 《Journal of clinical apheresis》2013,28(6):422-425
Antisynthetase syndrome (ASS) is characterized by inflammatory muscle disease, pulmonary and joint involvement, and antisynthetase autoantibodies, with anti‐Jo‐1 antibody being the most common. Despite the use of immunosuppressive drugs, the prognosis of lung involvement seems poor. Herein, we report a case of refractory ASS, which maintained long‐term remission by double filtration plasmapheresis (DFPP) combined with immunosuppressive therapy. For a 65‐year‐old woman, who was diagnosed with ASS, immunosuppressive therapy was initiated and plasmapheresis (PP) was performed five times due to acute interstitial pulmonary disease and inflammatory myopathy. She remained in remission for eight months following PP. Increase in interstitial involvement was identified by lung tomography when the patient presented again with complaint of progressive increase in dyspnea and muscle pain. Although the immunosuppressive therapy was increased for the patient with elevated creatine phosphokinase (CPK) (2776 IU/mL), a rapid decrease in diffusion capacity of the lung for carbon monoxide (DLCO) was observed and the patient underwent PP. After four sessions of therapy, insufficient clinical and laboratory response was obtained (control CPK 1797 IU/mL) and because of that issue DFPP using a 2A filter was performed to the patient. There was a marked improvement in complaints of the patient, DLCO, and laboratory findings (control CPK 508 IU/mL) after three sessions of DFPP. The patient, who continued the immunosuppressive therapy after DFPP procedure, is being followed for 12 months in remission. Although our experience is limited with only one patient, DFPP seems promising as a treatment option for ASS with severe lung involvement. J. Clin. Apheresis, 28:422–425, 2013. © 2013 Wiley Periodicals, Inc. 相似文献
49.
PURPOSEWe aimed to evaluate the prostate volumes calculated as recommended in the PI-RADS v2 and PI-RADS v2.1 guidelines, intraobserver and interobserver variability, and the agreement between the two measurement methods.METHODSProstate mpMRI examinations of 114 patients were evaluated retrospectively. T2-weighted sequences in the axial and sagittal planes were used for the measurement of the prostate volume. The measurements were performed by two independent observers as recommended in the PI-RADS v2 and PI-RADS v2.1 guidelines. Both observers conducted the measurements twice and the average values were obtained. In order to prevent bias, the observers carried out measurements at one-week intervals. In order to assess intraobserver variability, observers repeated the measurements again at one-week intervals. The prostate volume was calculated using the ellipsoid formula (W×H×L×0.52).RESULTSIntraclass correlation coefficient (ICC) revealed almost perfect agreement between the first and second observers for the measurements according to both PI-RADS v2 (0.93) and PI-RADS v2.1 (0.96) guidelines. The measurements were repeated by both observers. According to the ICC values, there was excellent agreement between the first and second measurements with respect to both PI-RADS v2 and PI-RADS v2.1 for first (0.94 and 0.96, respectively) and second observer (0.94 and 0.97, respectively). For both observers, the differences had a random, homogeneous distribution, and there was no clear relationship between the differences and mean values.CONCLUSIONThe ellipsoid formula is a reliable method for rapid assessment of prostate volume, with excellent intra- and interobserver agreement and no need for expert training. For the height measurement, the recommendations of the PIRADS v2.1 guideline seem to provide more consistently reproducible results.The prostate gland is one of the organs for which the disease incidence and prevalence in men increases with age. Prostate volume (PV) has an important role in the evaluation and management of both malignant and benign prostate diseases (1–3). In benign prostatic hyperplasia (BPH), prostate volume is used to decide upon treatment and evaluate response to medical therapy (3–5). In the diagnosis of prostate cancer, one of the important markers is prostate-specific antigen (PSA), but it has low specificity, and therefore PSA derivatives are used to increase its specificity. One example is PSA density, which is obtained by dividing the PSA value by PV. In the treatment of prostate cancer, PV is important, and the effectiveness of brachytherapy decreases in prostates with a volume greater than 50 mL (6). Furthermore, PV is used to identify appropriate patients for brachytherapy and select the number of radioactive seeds, and also determine fractionation for external beam radiation, radical prostatectomy operating planning and continence rate counseling, and focal therapy candidacy preparation (7, 8). For these reasons, it is vital to accurately calculate PV.There are many methods that can be used to calculate PV, with the ellipsoid formula being one of the most preferred since it is easy to apply and highly time-efficient (1–4, 9). Many studies have shown that this method has high accuracy due to the elliptic shape of the prostate (1, 2, 10–13). The ellipsoid formula is obtained by multiplying the height (anterior-posterior), width (medio-lateral) and length (cranio-caudal) values of the prostate by 0.52. These measurements can be performed by transrectal ultrasonography (TRUS) or magnetic resonance imaging (MRI). TRUS has certain disadvantages, such as being operator-dependent and susceptible to sonographic artifacts (14). MRI, which has become increasingly popular in recent years, allows for an accurate definition of the prostate boundaries and multiplanar measurements through its high contrast resolution of soft tissues (1, 5). It also provides more accurate measurements than TRUS (4, 15, 16).In order to ensure global standardization in the reporting of prostate MRI findings, PI-RADS v2 published in 2015, which is the revised version of PI-RADS 1.0, and the last updated version PI-RADS v2.1 made available in 2019, propose different calculation methods for the measurement of height in obtaining PV (17, 18). The midaxial plane is recommended for this measurement in PI-RADS v2, while the midsagittal plane is recommended in PI-RADS v2.1. This study aimed to evaluate the interobserver and intraobserver variability of PV calculated by both measurement methods and the agreement between the two measurement methods. 相似文献
50.
Erdal Tekin Ali Ahiskalioglu Muhammed Enes Aydin Emre Sengun Atif Bayramoglu Haci Ahmet Alici 《The American journal of emergency medicine》2019,37(2):375.e1-375.e3
Herpes zoster is a painful, eruptive, viral condition occurring with reactivation in immunosuppressed individuals. The selection of an effective analgesic method in the acute phase of herpes zoster can decrease the incidence of postherpetic neuralgia by reducing neural sensitization. The erector spinae plane block has been reported to provide diffuse and effective analgesia in the cervical, thoracic, and lumbar regions. We report an effective decrease in pain with the application of the high-thoracic erector spinae plane block in the emergency department in a patient with herpes zoster pain in the cervicothoracic and shoulder region. 相似文献