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   87篇
  免费   7篇
  国内免费   1篇
临床医学   31篇
内科学   11篇
皮肤病学   5篇
神经病学   7篇
特种医学   2篇
外科学   28篇
预防医学   5篇
眼科学   4篇
肿瘤学   2篇
  2024年   1篇
  2023年   1篇
  2021年   1篇
  2020年   2篇
  2019年   1篇
  2018年   1篇
  2017年   2篇
  2016年   3篇
  2015年   3篇
  2014年   2篇
  2012年   2篇
  2011年   2篇
  2010年   4篇
  2009年   6篇
  2007年   1篇
  2003年   2篇
  2001年   11篇
  2000年   5篇
  1998年   2篇
  1997年   1篇
  1996年   3篇
  1995年   3篇
  1994年   3篇
  1993年   3篇
  1990年   2篇
  1988年   3篇
  1986年   2篇
  1982年   1篇
  1978年   5篇
  1977年   1篇
  1963年   1篇
  1962年   4篇
  1961年   1篇
  1960年   1篇
  1958年   1篇
  1955年   6篇
  1954年   1篇
  1939年   1篇
排序方式: 共有95条查询结果,搜索用时 0 毫秒
71.
Abstract A recent study used both qualitative and quantitative methods to examine families' perceptions of service needs for children with disruptive behavior problems. Focusing on the qualitative component of the study, the present paper discusses the modified Nominal Group Technique used in focus groups attended by carers living in rural, regional or metropolitan contexts. Three questions posed to each focus group sought to identify families' concerns about health facilities and/or related support services currently available to them, the benefits they perceived in these services and the changes needed to make these services more appropriate or accessible to them. Major themes in the responses relating to each of these questions included concerns about a lack of, or perceived need for, access to help/support, benefits in schools that accommodated the needs of the children, and support from the community. Families' recommendations for change included increased access to health care advice, information and/or support systems.  相似文献   
72.
Frequent minor side effects are associated with sulfasalazine. The realization that it is the 5-aminosalicylic acid moiety that is the active component of sulfasalazine and that the side effects are probably due to the sulfapyridine has prompted the search for a similar but safer compound. Olsalazine, consisting of two molecules of 5-ASA without sulfasalazine may avoid the problems due to sulfasalazine. One hundred one patients were entered into a double-blind placebo-controlled study of the use of olsalazine 92 g daily) in preventing relapse in patients who had recently recovered from an acute attack of ulcerative colitis. Patients were treated for 12 months. Forty-nine were randomized to olsalazine (39 with limited and 10 with extensive disease) and 52 to placebo (42 with limited and 10 with extensive disease). Life-table analysis showed that the median time to relapse in patients on olsalazine was 342 days, which was significantly longer than the 100 days in the placebo group (P=0.024). The most important side effect experienced with olsalazine that necessitated withdrawal from the study was drug-induced diarrhea in 16% (8/49). There was a similar incidence of minor side effects reported in the two groups, and in no patients were major or dangerous side effects reported. In patients who did not develop diarrhea, olsalazine was well tolerated and successfully prevented rapid relapse in the recently ill patients entered into this study.  相似文献   
73.
74.
75.
The posterior cruciate ligament (PCL) is a major stabilizer of the knee. It is a structure that can be injured both inhigh-energy situations (eg, road traffic accidents) and in low-energy environments such as sporting injuries. The PCL can be torn in isolation or in combination with other knee structures /ligaments with the mechanism of injury determining the structures damaged. The treatment of the PCL-injured knee is a controversial issue. The literature on PCL injuries is confusing and contradictory. The treatment should be based on the natural history of the PCL-deficient knee because this sets the baseline from which any interventions may be compared in terms of outcome. However, there are very few true natural history studies on the PCL-injured knee, with most of the literature being retrospective and including a mixture of patients and injuries. In this article, we review the relevant literature with an emphasis on the published true natural history studies, and we assess the healing potential of the torn PCL and outline our management thoughts on the PCL-injured knee, including possible future directions in PCL research and treatment.  相似文献   
76.
PURPOSE: To test the efficacy of a combination of selective pre- and post-surgical local anesthetic infiltrations of the knee, compared with standard intra-articular injection at the end of surgery alone, to reduce postoperative opioid requirements following arthroscopic cruciate ligament reconstruction (ACLR). METHODS: In a double-blind, randomized, controlled trial, we studied 23 patients (ASA I or II) scheduled for elective ACLR under general anesthesia. The treatment group (n = 12) received infiltrations with bupivacaine 0.25% with epinephrine 1:200,000 presurgically (10 ml into the portals, 10 ml at the medial tibial incision site, 10 ml at the lateral femoral incision site, and 10 ml intra-articularly) and postsurgically (5 ml at the medial tibial incision and 10 ml at the lateral femoral incision). The control group (n = 11) received infiltrations with saline 0.9% in the same manner. All patients received a standard intra-articular local anesthetic instillation of the knee (25 ml of bupivacaine 0.25% with epinephrine 1:200,000) at the completion of surgery. RESULTS: Postoperative opioid requirements were lower in the treatment group (5.8 +/- 2.9 mg morphine equivalent) than in the control group ( 13.7 +/- 5.8 mg; P = 0.008). Treatment patients were ready for discharge approximately 30 min earlier than control patients (P = 0.046). There were no adverse events in the treatment group. In the control group, 2/11 patients vomited and a third experienced transient postoperative diaphoresis, dizziness and pallor. CONCLUSION: We conclude that a combination of selective pre- and post-surgical wound infiltration with bupivacaine 0.25% provides superior analgesia compared with a standard post-surgical intra-articular injection alone.  相似文献   
77.
PURPOSE: To compare two small-dose solutions (with and without epinephrine) for spinal anesthesia during outpatient laparoscopy and to determine spinal cord function with these low-dose solutions. METHOD: Twenty outpatients undergoing gynecological laparoscopy were randomly assigned to receive spinal anesthesia with one of two low dose solutions. Group LS-10 mg lidocaine plus 10 microg sufentanil; Group LSE-10 mg lidocaine plus 10 microg sufentanil plus epinephrine 50 microg. Solutions were diluted to three millilitres with sterile water for injection. A 27-gauge Whitacre needle was inserted at L2-3 or L3-4 in the sitting position. Operating conditions and spinal cord function (spinothalamic, dorsal column and motor) were assessed. RESULTS: Operating conditions were good-excellent in both groups. The incidence of shoulder tip discomfort, pruritus and nausea, and the amount of supplementation with alfentanil and midazolam was not different between groups. Most patients in both groups had preserved dorsal column function and normal motor power on arrival in PACU and were able to satisfy 'walk out' criteria. Recovery of pinprick sensation and discharge times were not different. Mild pruritus (VAS score < or = 5) was present in both groups. CONCLUSION: For short duration laparoscopy, addition of 50 microg epinephrine to a small dose of spinal 10 mg lidocaine with 10 microg sufentanil did not provide additional benefit in terms of intraoperative analgesia or operating conditions. Spinal cord function was preserved with small-dose techniques.  相似文献   
78.
PURPOSE: To apply a population pharmacodynamic model to small-dose hypobaric spinal anesthesia for outpatient laparoscopy. METHODS: The level of spinal analgesia after spinal blockade with small-dose (20-25 mg) hypobaric lidocaine was assessed by means of pinprick in patients undergoing outpatient laparoscopy. In 57 patients, 385 measurements were available for analysis. We first modelled the data for each patient with a mixed-effects model described by Schnider (Model 1). The population mean parameters, inter-individual variance, and residual variance were estimated. Clinically important endpoints (time to reach T10 (onset), time to maximal level, duration and maximally attained level) of each patient were calculated based on the estimated time course of analgesia level for each patient. The model was used to predict the later data with respect to level of spinal analgesia of each patient from fits based on the observed data in the first 75 min. RESULTS: The mean +/- SD onset time was 8.3 +/- 1.9 min, time to maximal level was 20.8 +/- 5.3 min, duration of effect was 37.9 +/- 13.1 min, and mean maximal level was T5. There was a good correlation (R2 = 0.90) between the observed levels of analgesia and those predicted from the model. Data from the first 75 min predicted the later observed data for each patient moderately well (R2 = 0.38). CONCLUSION: A population pharmacodynamic model was applied to low-dose hypobaric lidocaine spinal anesthesia. Clinically important endpoints were determined and forecasting of later data with respect to level of spinal analgesia was attempted. Such an approach may be useful in the management of low-dose spinal anesthetic techniques in outpatients.  相似文献   
79.
80.
Abstract: Axillary lymph node status is an important factor in determining the prognosis and treatment in patients with invasive breast cancer. The introduction of the sentinel lymph node biopsy technique in the axilla has significantly reduced the number of patients requiring an axillary clearance procedure. However, a proportion of patients will be found to have axillary metastases after a sentinel node biopsy and will then require a second axillary surgical procedure. A retrospective audit of 653 consecutive patients presenting with invasive breast cancer showed a preoperative diagnosis rate of axillary disease of 23% using axillary ultrasound and fine‐needle aspiration (FNA) together. We performed 232 axillary FNAs to diagnose 150 positive axillae. This avoided the need for a second operation in 150 women. The negative predictive value for axillary metastases using this technique was 79%. Overall accuracy was 84%.  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