首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   211篇
  免费   8篇
  国内免费   3篇
耳鼻咽喉   3篇
儿科学   5篇
妇产科学   10篇
基础医学   23篇
口腔科学   11篇
临床医学   36篇
内科学   33篇
皮肤病学   1篇
神经病学   17篇
特种医学   16篇
外科学   28篇
综合类   1篇
预防医学   5篇
眼科学   9篇
药学   6篇
肿瘤学   18篇
  2023年   6篇
  2022年   4篇
  2021年   6篇
  2020年   6篇
  2019年   9篇
  2018年   8篇
  2017年   5篇
  2016年   7篇
  2015年   11篇
  2014年   14篇
  2013年   13篇
  2012年   24篇
  2011年   11篇
  2010年   6篇
  2009年   6篇
  2008年   11篇
  2007年   15篇
  2006年   13篇
  2005年   15篇
  2004年   15篇
  2003年   8篇
  2002年   2篇
  2001年   2篇
  2000年   3篇
  1998年   1篇
  1988年   1篇
排序方式: 共有222条查询结果,搜索用时 15 毫秒
1.
ObjectiveThe purpose of this study was to compare the effects of a 6-week program of pelvic floor muscle training (PFMT) plus connective tissue massage (CTM) to PFMT alone in women with overactive bladder (OAB) symptoms on those symptoms, pelvic floor muscle strength, and quality of life.MethodsThirty-four participants were randomly divided into PFMT+CTM (n = 17) and PFMT (n = 17) groups. PFMT was applied every day and CTM was applied 3 days a week for 6 weeks. Before treatment, at week 3, and after treatment (week 6), we assessed pelvic floor muscle strength (with a perineometer), bladder symptoms (with a urine diary), OAB symptom severity (with the 8-item Overactive Bladder Questionnaire [OAB-V8]), urgency (with the Patient Perception of Intensity of Urgency Scale [PPIUS]), and quality of life (with King's Health Questionnaire [KHQ]). The Mann–Whitney U test, χ2 test, Friedman test, and Dunn multiple comparison test were used for analysis.ResultsIn both groups, pelvic floor muscle strength increased, whereas OAB symptoms and PPIUS and KHQ scores decreased after treatment (P < .05). Although the OAB-V8, PPIUS, and KHQ scores decreased at week 3, frequency, OAB-V8, and PPIUS scores, in addition to some parameters of the KHQ, decreased after treatment in the PFMT+CTM group compared to the PFMT group (P < .05).ConclusionCompared to PFMT alone, PFMT+CTM achieved superior outcomes in reducing OAB symptoms in the early and late periods.  相似文献   
2.
The comparison of shear stress determination methods in tubular specimens under torsion is presented in this paper. Four methods were analyzed: purely elastic solutions, purely plastic solutions, the midsection approach, and the Chaboche nonlinear kinematic hardening model. Using experimental data from self-designed and conducted fatigue experiments, an interesting insight on this problem was obtained that is not often tackled in the literature. It was shown that there are differences in determined shear stress values, and their level depends on a few factors. The midsection approach and purely plastic solution gave values of surface shear stress very close to the values obtained using the Chaboche nonlinear kinematic hardening model for high strain levels. The purely elastic solution gave proper results for the low strain ranges, close to the cyclic yield limit. Since none of the methods can be trusted in the full range of loading, an important conclusion from these analyses regards the formulated ranges of their applicability. It was also shown that the calculated values of shear stress and plastic and elastic strain energy density determined on this basis have a strong impact on fatigue life predictions. Finally, the influence of predicted values of shear stresses on the interpretation of cyclic hardening phenomena was also presented.  相似文献   
3.
The principal sensory (PrV) nucleus‐based trigeminal lemniscus conveys whisker‐specific neural patterns to the ventroposteromedial (VPM) nucleus of the thalamus and subsequently to the primary somatosensory cortex. Here we examined the perinatal development of this pathway with carbocyanine dye labeling in embryonic and early postnatal mouse brains. We developed a novel preparation in which the embryonic hindbrain and the diencephalon are flattened out, allowing a birds‐eye view of the PrV lemniscus in its entirety. For postnatal brains we used another novel approach by sectioning the brain along an empirically determined oblique horizontal angle, again preserving the trigeminothalamic pathway. PrV neurons are born along the hindbrain ventricular zone and migrate radially for a short distance to coalesce into a nucleus adjacent to the ascending trigeminal tract. During migration of the spindle‐shaped cell bodies, slender axonal processes grow along the opposite direction towards the floor plate. As early as embryonic day (E) 11, pioneering axons tipped with large growth cones cross the ventral midline and immediately make a right angle turn. By E13 many PrV axons form fascicles crossing the midline and follow a rostral course. PrV axons reach the midbrain by E15 and the thalamus by E17. While the target recognition and invasion occurs prenatally, organization of PrV axon terminals into whisker‐specific rows and patches takes place during the first 4 postnatal (P) days. Initially diffuse and exuberant projections in the VPM at P1 coalesce into row and whisker specific terminal zones by P4. J. Comp. Neurol. 521:299–311, 2013. © 2012 Wiley Periodicals, Inc.  相似文献   
4.
Background: The level and activity of indoleamine 2,3-dioxygenase (IDO) and the concentrations of L-tryptophan and its metabolite L-kynurenine were determined in association with various renal diseases. However, there have been no data regarding these parameters in patients on peritoneal dialysis compared to those undergoing hemodialysis or kidney transplantation.

Methods: This study investigated the level and activity of IDO and determined oxidative balance by calculating the total oxidant status (TOS), total antioxidant status (TAS), and oxidative stress index (OSI). We enrolled 60 kidney disease patients, including 20 on peritoneal dialysis (PD group), 19 on hemodialysis (HD group), and 21 with kidney transplantation (KT group), as well as 21 control group.

Results: IDO levels were increased in the PD, HD, and KT groups compared to the control group. The concentration of kynurenine was significantly increased in the PD group compared to the other groups (p?p?p?Conclusion: The results showed that IDO levels were increased in peritoneal dialysis and hemodialysis patients and in renal transplant recipients, while oxidative stress was found to be related to IDO activity and was most increased in the patients on peritoneal dialysis.  相似文献   
5.

Background

An increasing number of patients receive palliative chemotherapy near the end of life. The aim of this study is to evaluate the aggressiveness of chemotherapy in Turkish individuals near the end of life.

Methods

Patients diagnosed with solid tumors and died from 2010 to 2011 in the medical oncology department of Akdeniz University were included in the study. Data about the diagnosis, treatment details and imaging procedures were collected.

Results

Three hundred and seventy-three people with stage IV solid tumors died from 2010 to 2011 in our clinic. Eighty-nine patients (23.9%) patients underwent chemotherapy in the last month of life while 39 patients (10.5%) received chemotherapy in the last 14 days. The probability of undergoing chemotherapy in the last month of life was influenced by: age, ‘newly diagnosed’ patients, and performance status. There was no significant association of chemotherapy in the last month of life with gender and tumor type. Having a PET-CT scan did not alter the chemotherapy decision.

Conclusion

In conclusion, chemotherapy used in the last month of life in a tertiary care center of Turkey is high. Increasing quality of life should be a priority near the end of life and physicians should consider ceasing chemotherapy and direct the patient to early palliative care.
  相似文献   
6.
The coexistence of lung cancer and glomerular lesion is not commonly reported. Malignancy-related glomerulopathy is commonly membranous glomerulonephritis. Other glomerulopathies are seldom reported. We report two cases presenting with non-small-cell lung cancer, acute renal failure and nephrotic syndrome secondary to membranoproliferative glomerulonephritis and amyloidosis.  相似文献   
7.
BACKGROUND: Mesenteric ischemia-reperfusion (I/R) is a well-known event causing both local and remote organ injuries, including the lungs. Recently, several studies indicated that activated leukocyte-endothelial cell interactions play an important role in the mechanisms of these injuries. As a natural inhibitor of serine proteases, antithrombin was shown previously to attenuate the tissue damage after local I/R in several organ systems. Here, we examined the effects of antithrombin on pulmonary injury after mesenteric I/R. METHODS: Wistar albino rats underwent median laparotomy and were randomized into 3 groups: (1) sham-operated control (n = 12), (2) 60 minutes of mesenteric ischemia and 3 hours of reperfusion (n = 12), and (3) antithrombin-pretreated (250 U/kg) group before the I/R (n = 12). At the end of reperfusion, animals were killed and neutrophil sequestration, myeloperoxidase (MPO) activity, and Evans blue dye extravasation in the lung parenchyma were assessed and compared. RESULTS: There was a statistically significant increase in the quantity of Evans blue dye concentration, leukocyte sequestration, and MPO activity in the I/R group when compared with the control group. The pretreatment of animals with antithrombin significantly decreased the pulmonary injury characterized by increased Evans blue dye extravasation, leukocyte sequestration, and MPO activity. CONCLUSION: The data of the present study suggest that mesenteric ischemia and reperfusion induces pulmonary injury characterized by activated neutrophil sequestration and increased microvascular leakage in the lungs. A significant attenuation of intestinal I/R-related lung injury with the use of antithrombin concentrate warrants further studies to elucidate the potential role of this natural serine protease inhibitor in clinical settings.  相似文献   
8.
Posterior mediastinal tumors of neurogenic origin commonly arise from the sympathetic or intercostal nerves. However, anterior mediastinal tumors rarely originate from the vagus nerve, and primary neurogenic tumors of the trachea are extremely uncommon. A 19-year-old man was admitted to an emergency department in sudden acute respiratory distress. A tracheostomy was performed and he was transferred to our Ear Nose and Throat Department for further investigation. A bronchoscopic biopsy was taken of a mass occupying the tracheal lumen and intraoperative frozen section examination suggested a schwannoma, so tracheal resection was performed. Although rare, primary tracheal schwannoma should be considered in the differential diagnosis of sudden respiratory distress of unknown origin.  相似文献   
9.
A new ursane-type triterpenoid, 3 beta,11 alpha,21 alpha-trihydroxyurs-12-ene, named salvistamineol (1), has been isolated from the methanol extract of Salvia staminea. In addition to 1, the methanol extract yielded four known compounds and the acetone extract yielded twelve known compounds consisting of two sesquiterpenes, six diterpenoids, a triterpenoid, two steroids and one flavone. DNA damaging properties of the extracts and some isolated diterpenes were investigated against three yeasts and only taxodione gave a positive response and also showed the highest cytotoxic activity against a panel of cell lines among the investigated compounds in this study.  相似文献   
10.

Objective

Postural control of patients with chronic low back pain (CLBP) is usually impaired. Effects of treatment applications on postural stability have not been well investigated. The aim of this study was to investigate the immediate effects of kinesio taping on pain and postural stability in patients with CLBP.

Methods

One hundred and one patients with CLBP (age: 53.00 (10.69) years, body mass index (BMI): 31.52 (5.57) kg/m2) were included in this study. Kinesio taping was applied on paravertebral muscles and sacrum with muscle and ligament techniques. Postural stability was assessed with Biodex Balance System® (USA) both at static and dynamic mode in bilateral standing position. The base was set “static” for static mode, and set between“12-1” for dynamic mode. Pain intensity was evaluated with the pain section (0–5 points) of Oswestry Disability Index, including ten items (pain, personal care, lifting, walking, sitting, standing, sleeping, sex life, social life, travelling), pre- and post-application.

Results

The static overall (pre: 1.49 (1.15), post: 1.25 (1.11)) and antero-posterior (pre: 0.96 (0.86), post: 0.74 (0.59)), dynamic overall (pre: 3.12 (2.26), post: 2.73 (2.44)) and medio-lateral postural sway scores (pre: 1.62 (1.12), post: 1.24 (0.75)), and pain (pre: 2.00 (0.00–5.00), post: 1.00 (0.00–4.00)) decreased after the application (p?<?.05). However, no differences were observed in static medio-lateral (pre: 0.84 (0.78), post: 0.82 (1.01)) and dynamic antero-posterior postural sway scores (pre: 2.33 (1.99), post: 2.12 (2.33)), (p?>?.05).

Conclusions

Kinesio taping may immediately improve postural stability and decrease pain of patients with CLBP.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号