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   39807篇
  免费   3863篇
  国内免费   815篇
耳鼻咽喉   203篇
儿科学   731篇
妇产科学   826篇
基础医学   2319篇
口腔科学   2132篇
临床医学   11466篇
内科学   3060篇
皮肤病学   220篇
神经病学   3912篇
特种医学   1126篇
外国民族医学   5篇
外科学   6891篇
综合类   3464篇
一般理论   4篇
预防医学   1761篇
眼科学   156篇
药学   3103篇
  78篇
中国医学   1994篇
肿瘤学   1034篇
  2024年   81篇
  2023年   936篇
  2022年   1081篇
  2021年   1980篇
  2020年   2088篇
  2019年   2119篇
  2018年   1966篇
  2017年   1930篇
  2016年   1754篇
  2015年   1650篇
  2014年   3064篇
  2013年   3696篇
  2012年   2200篇
  2011年   2443篇
  2010年   1969篇
  2009年   1778篇
  2008年   1937篇
  2007年   1685篇
  2006年   1518篇
  2005年   1227篇
  2004年   1044篇
  2003年   904篇
  2002年   773篇
  2001年   667篇
  2000年   515篇
  1999年   471篇
  1998年   378篇
  1997年   366篇
  1996年   274篇
  1995年   249篇
  1994年   238篇
  1993年   188篇
  1992年   190篇
  1991年   144篇
  1990年   92篇
  1989年   107篇
  1988年   87篇
  1987年   98篇
  1986年   96篇
  1985年   97篇
  1984年   80篇
  1983年   63篇
  1982年   71篇
  1981年   55篇
  1980年   39篇
  1979年   24篇
  1978年   17篇
  1977年   12篇
  1976年   19篇
  1975年   12篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
991.
992.
Objectives: To observe the distribution of patients who presented with low back pain (LBP) and to determine the between therapists’ interrater reliability of assessments in a private outpatient setting using treatment-based classification (TBC) subgroups.

Methods: An observational and methodological study was conducted. Four hundred and twenty-nine patients (231 male; 198 female) presenting LBP symptoms and referred to conservative treatment were assessed by 13 physical therapists who conducted a 60-min examination process utilizing TBC subgroups. Interrater reliability analyses from six raters were assessed using Fleiss’ kappa and previously recorded data (n = 30).

Results: In this study, 65.74% of patients were classified in only one subgroup, the most prevalent being stabilization (21.91%), followed by extension (15.38%), traction (11.89%), flexion (10.96%), manipulation (5.13%), and lateral shift (0.47%). Approximately 20.98% of patients were classified in two subgroups, where the most frequent overlaps were flexion + stabilization (7.46%), extension + stabilization (6.06%), flexion + traction (4.20%), extension + manipulation (1.86%), and 13.29% of patients were not classified in any TBC subgroup. Analysis of interrater reliability showed a kappa value of 0.62 and an overall agreement of 66% between raters.

Discussion: LBP is a heterogeneous clinical condition and several classification methods are proposed in the attempt to observe better outcomes for patients. Eighty-five percent of patients assessed were able to be classified when using the TBC assessment and reliability analysis showed a substantial agreement between raters.

Level of Evidence: 2c.  相似文献   

993.
Objectives: The purpose of this anatomic investigation is to (1) establish accuracy of dry needle placement into the medial third of the piriformis muscle as it exits the pelvis from the greater sciatic notch in unembalmed cadaveric specimens, while avoiding puncture of the sciatic nerve, and (2) establish guidelines for dry needle length selection.

Methods: Dry needles were placed in nineteen unembalmed cadaveric posterior hips. Dissection of the posterior hip musculature was performed to confirm location of the needle. A binary decision (yes/no) was made to determine whether the needle reached the piriformis muscle, went through the piriformis muscle, and/or pierced the sciatic nerve. Additionally, mean adipose tissue thickness, gluteus maximus muscle thickness, and perpendicular distance from the needle to the exiting sciatic nerve were recorded.

Results: The needle reached the medial third of the piriformis in 16 out of 19 hips (84.2% accuracy) and never punctured the sciatic nerve. There was a fair (r = 0.493) and good (r = 0.759) correlation between the needle length and the mean fat thickness for the left and right hips, respectively.

Discussion: A physical therapist was able to use bony landmark palpation to locate the piriformis muscle and use estimated adipose tissue thickness to choose a sufficient needle length to reach the medial third of the piriformis muscle. While the needle placement technique was safe and no sciatic nerve puncture occurred, the proximity of the piriformis muscle to the sciatic nerve warrants caution during needle placement.

Level of Evidence: 2c  相似文献   

994.
Objectives: Mechanical neck pain (MNP) is common in the athletic population. While symptoms may present at the cervical spine for patients complaining of MNP, thoracic spinal alignment or dysfunction may influence cervical positioning and overall cervical function. Clinicians often employ cervical high-velocity low-amplitude (HVLA) thrust manipulations to treat MNP, albeit with a small level of inherent risk. Mulligan Concept positional sustained natural apophyseal glides (SNAGs) directed at the cervicothoracic region are emerging to treat patients with cervical pain and dysfunction, as evidence supporting an interdependent relationship between the thoracic and cervical spine grows. The purpose of this a priori study was to evaluate outcome measures of patients classified with MNP treated with the Mulligan Concept Positional SNAGs. Methods: Ten consecutive young-adult patients, ages ranging from 15 to 18 years (mean = 16.5 ± 1.78), classified with MNP were treated utilizing Mulligan Concept Positional SNAGs. The Numeric Rating Scale (NRS), Patient-Specific Functional Scale (PSFS), Neck Disability Index (NDI), Disablement in the Physically Active (DPAS), and Fear-Avoidance Based Questionnaire-Physical Activity (FABQPA) were collected for inclusion criteria and to identify patient-reported pain and dysfunction. Results: Patients reported decreases in pain on the NRS [5.4 to .16, p = .001], increases in function on the PSFS [5.2 to 10, p = .001], and increases in cervical range of motion (CROM) [ext p = .003, flex p = .009, left rot p = .001, right rot p = .002] immediately post-treatment and between treatments. Discussion: Positional SNAGs directed at the cervicothoracic region may address a variety of patient reported symptoms for MNP, and the number of treatment sessions needed for symptom resolution may be closer to a single session rather than multiple treatments. Level of Evidence: 4.  相似文献   
995.
Background: The incidence and severity of phantom limb pain (PLP) does not differ much between the extremities of amputation. However, its impact on functional ability and quality of life in lower limb amputation may be different, as prosthetic weight bearing is a key component in the movement and functional rehabilitation of individuals with a lower limb amputation.

Objective: To evaluate the evidence for effectiveness or efficacy of non-pharmacological interventions in the management of PLP in adults with lower limb amputation.

Methods: A comprehensive literature search conducted on 11 electronic databases, from their inception to 25 March 2016 identified 626 potentially relevant articles. Full-text randomised controlled trials in English which examined any form of non-pharmacologic intervention for managing PLP in lower limb amputees were included. The data with regard to characteristics of the studies, participants, intervention and outcome measures and overall statistical result were extracted. The Cochrane ‘Risk of bias assessment tool’ was used to assess the bias of all included articles.

Results: Four studies met the final criteria to be included in the review. Four treatment techniques had been used in the treatment of 204 patients with lower limb amputation. Two trials showed a positive impact of intervention on PLP compared to control group. Risk of bias varied across studies, and only one included study was assessed as having a low risk of bias.

Conclusion: The review identified lack of evidence to support non-pharmacological interventions in the management of PLP. Adequately powered high-quality trials are needed in this area to inform rehabilitation.  相似文献   

996.
997.
目的:探讨以护士为核心的新型疼痛管理模式,为术后患者疼痛的管理提供科学的经验。方法:选择2016年5月至2017年4月在我院行胸、腹微创手术的患者,共212名。随机分为干预组106例,对照组106例。对照组按常规方式进行术后疼痛管理;干预组由护士进行常规疼痛管理外,同时参与患者自控式镇痛(PCA)泵的管理。结果:各研究组中没有明显药物不良反应发生。干预组停泵率明显低于对照组。在胸部手术后行静脉镇痛的患者中干预组的镇痛效果优于对照组;其他治疗组间的镇痛效果比较虽无差异,但干预组的额外用药量却显著降低。研究证明通过以护士为核心,多学科协作的疼痛管理,使自控式镇痛泵得到了充分应用,额外镇痛药物的用药量明显减少。结论:以护士为核心的多学科协作管理模式在术后镇痛管理中具有很大的优势,起到了重要的作用。  相似文献   
998.

Background

Neck pain is a common musculoskeletal complaint in computer users due to prolonged static or awkward work postures. It has been shown that pathogenesis of neck pain is associated with scapular movement impairment syndromes. However, there is a dearth of literature in treatment based on these syndromes.

Aim

To identify the effects of movement impairment-based treatment in the management of mechanical neck pain, in computer users.

Methods

In the present study, twenty-seven subjects were recruited. Based on the identified scapular impairment syndrome, they were trained with scapular movement impairment-based exercises for four weeks. Pain, disability and cervical range of motion were measured with numeric pain rating scale, neck disability index and inclinometer, respectively, at baseline and at four weeks.

Results

Twenty-one subjects completed the study. After four weeks, a significant difference of 4.81 points for numeric pain rating scale and 24.47% for neck disability index at 95% CI were found. The cervical range of motion showed a significant change (p < 0.05) of 10.09° for flexion, 24.47° for extension, 7.42° for right lateral flexion, 6.23° for left lateral flexion, 15.52° for right rotation and 14.95° for left rotation at 95% CI.

Conclusions

Exercises based on scapular impairment syndromes were given for four weeks. It was found to be effective in relieving pain and reducing dysfunction in computer users with mechanical neck pain  相似文献   
999.

Background

There is a hypothesis that the growing use of mobile phones in an inappropriate posture to text and read (text neck) could be a reason for the increasing prevalence of neck pain in the past decade. Before testing if there is an association between text neck and neck pain, it is necessary to develop reliable pragmatic tools appropriate to epidemiological studies.

Objectives

The primary aim of this study was to assess the reliability of the self-perception of text neck, as well as the reliability of physiotherapists’ classification of the text neck.

Methods

The convenience sample was composed of 113 high school students between 18 and 21 years old from a cross-sectional study. As their self-perceived posture, participants had to choose in a questionnaire one of four neck postures of a person texting on a mobile phone. The physiotherapists classified lateral photographs taken with the participants texting on a mobile phone in their habitual posture as 1 (normal), 2 (acceptable), 3 (inappropriate), and 4 (excessively inappropriate).

Results

The results showed that the test–retest reliability of the self-perception was substantial (kappa?=?0.73, 95% CI 0.54 to 0.86). The reliability of the physiotherapists’ responses, according to the photographic analysis considering the three raters, was moderate (kappa?=?0.5, 95% CI 0.39 to 0.61). Seventy-six percent of the participants with appropriate posture in the photographic analysis self-reported an inappropriate posture.

Conclusion

This study showed that the self-perception of the neck posture during mobile phone texting is reliable over time and that the physiotherapists’ classification based on photographic analysis was acceptable for epidemiological studies. Participants had a tendency to report that the posture was worse than it actually was in the photographic analysis performed by the physiotherapists.  相似文献   
1000.
This case report presents the effect of Cognitive Functional Therapy (CFT) in a patient with chronic non-specific neck pain. The patient believed that pain signified tissue damage, and demonstrated pain catastrophizing, hypervigilance, stress sensitivity, and movement impairment of the neck, during extension and rotation. The CFT intervention integrated a cognitive approach with manual therapy and active exercises to encourage the patient to trust her neck again. One month after the first appointment, the patient had recovered confidence, and the pain and disability had disappeared almost entirely.  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