全文获取类型
收费全文 | 7904篇 |
免费 | 325篇 |
国内免费 | 52篇 |
专业分类
耳鼻咽喉 | 11篇 |
儿科学 | 70篇 |
妇产科学 | 1199篇 |
基础医学 | 665篇 |
口腔科学 | 23篇 |
临床医学 | 603篇 |
内科学 | 404篇 |
皮肤病学 | 250篇 |
神经病学 | 233篇 |
特种医学 | 188篇 |
外科学 | 818篇 |
综合类 | 1155篇 |
预防医学 | 1586篇 |
眼科学 | 9篇 |
药学 | 595篇 |
3篇 | |
中国医学 | 347篇 |
肿瘤学 | 122篇 |
出版年
2024年 | 10篇 |
2023年 | 91篇 |
2022年 | 210篇 |
2021年 | 270篇 |
2020年 | 263篇 |
2019年 | 227篇 |
2018年 | 232篇 |
2017年 | 244篇 |
2016年 | 282篇 |
2015年 | 235篇 |
2014年 | 581篇 |
2013年 | 585篇 |
2012年 | 540篇 |
2011年 | 637篇 |
2010年 | 484篇 |
2009年 | 473篇 |
2008年 | 427篇 |
2007年 | 383篇 |
2006年 | 334篇 |
2005年 | 252篇 |
2004年 | 205篇 |
2003年 | 186篇 |
2002年 | 159篇 |
2001年 | 109篇 |
2000年 | 112篇 |
1999年 | 74篇 |
1998年 | 74篇 |
1997年 | 69篇 |
1996年 | 47篇 |
1995年 | 68篇 |
1994年 | 40篇 |
1993年 | 37篇 |
1992年 | 46篇 |
1991年 | 26篇 |
1990年 | 22篇 |
1989年 | 19篇 |
1988年 | 14篇 |
1987年 | 16篇 |
1986年 | 14篇 |
1985年 | 23篇 |
1984年 | 28篇 |
1983年 | 16篇 |
1982年 | 21篇 |
1981年 | 21篇 |
1980年 | 15篇 |
1979年 | 10篇 |
1977年 | 7篇 |
1976年 | 7篇 |
1974年 | 7篇 |
1973年 | 10篇 |
排序方式: 共有8281条查询结果,搜索用时 0 毫秒
51.
目的 探讨同一个体口腔脱落细胞和血液检测无精子因子(AZF)缺失的相关性,研究口腔脱落细胞检测AZF 的可行
性。方法 选择287例研究对象,其中严重少弱精症120 例,无精症80例,正常男性87例。同一受试对象的血液和口腔脱落细胞样本统一编号。应用多重PCR 技术,分别检测口腔脱落细胞、血液基因组中AZF区域的Y 染色体微缺失情况。结果 血液和口腔脱落细胞检出AZF缺失的样本编号一一对应,并且缺失类型一致。在200 例患者中,29 例检出基因组AZF 基因微缺失,余171 例患者和87例正常对照者未检出AZF 基因微缺失。结论 在进行Y染色体微缺失筛查中,口腔脱落细胞检测AZF 简便、无创,可以替代血液AZF检测。 相似文献
52.
目的:探讨膀胱三角区壁瓣成形尿道治疗女性外伤性尿道损伤的疗效。方法:自膀胱颈后唇向上,取梯字形壁瓣,形成锥状管,经膀胱颈口,自阴道前壁外拉至外阴部,在原尿道外口处固定,替代尿道。结果:3例随访8年,1例6年,1例5年,平均随访7年,均排尿通畅,无尿失禁和尿道狭窄。结论:女性外伤性尿道缺损,应用膀胱三角区壁瓣形成锥状管替代尿道法治疗,手术简单,对患者打击小,成功率高,远期效果好。 相似文献
53.
Altay B Kefi A Tavmergen E Cikili N Semerci B Tavmergen Goker E 《International urology and nephrology》2002,33(1):95-99
Introduction: Testicular sperm extraction (TESE) is well-defined procedure for surgical sperm retrieval in obstructive and non-obstructive azoospermia. This study was focused on the effectiveness of testicular sperm extraction and intracytoplasmic sperm injection (ICSI) for azoospermic men with different female age subgroups.Materials and methods: A total of 107 men with azoospermia underwent TESE and ICSI treatment. The women were examined in three groups 20–29, 30–34 and 35 years or older. The main outcome in this study was fertilization and pregnancy rates with TESE and ICSI.Results: Spermatozoa were successfully retrieved during 97 of 107 (90.7%) TESE attempts, resulting in the fertilization of 286 of 563 (50.4%) injected metaphase II oocytes. Two hundred and fifty-five of them were transferred (89.8%). The clinical pregnancy rate and ongoing pregnancy rate per embryo transfer were 22.5% and 20.6% respectively. When comparing the fertilization and pregnancy rates, it was observed that women between the ages of 20–29 years had significantly higher pregnancy rates than women over 34 years of age (p < 0.05).Conclusion: The female age is a major factor in determining successful implantation in ICSI. 相似文献
54.
原发女性生殖道恶性黑色素瘤21例临床分析 总被引:2,自引:0,他引:2
目的探讨原发性女性生殖道恶性黑色素瘤的临床特点、治疗及预后。方法回顾分析本院1986年1月至2006年3月收治的原发性女性生殖道恶性黑色素瘤患者21例。其中外阴8例、阴道10例、阴道及宫颈1例、外阴及阴道1例、盆腔1例。结果患者中位年龄50(21~71)岁。临床表现主要为阴道流血、流液及发现外阴或阴道肿物。本资料阴道恶性黑色素瘤发病率高于外阴恶性黑色素瘤。按照国际妇产科联盟(FIGO)分期,期别和预后呈负相关。治疗以手术为主,手术方式由根治性切除逐渐衍变为扩大局部切除。随访:21例患者中随访率为67%(14/21),随访时间6~96个月,死亡7例,随访期间的死亡率为50%。结论女性生殖道恶性黑色素瘤发病率低,预后差。肿瘤厚度和淋巴结转移是其主要的危险因素。应采用手术基础上的综合治疗,治疗方案个体化。 相似文献
55.
激活素-抑制素-卵泡抑素系统研究进展 总被引:3,自引:0,他引:3
抑制素、激活素和卵泡抑素主要由垂体细胞和卵巢颗粒细胞分泌,是细胞转化生长因子-β超家族的成员。通过内分泌及自/旁分泌调节作用参与了女性体内众多的生殖生理活动。本文综述关于抑制素、激活素和卵泡抑素的研究进展,包括生物合成、信号传导的调节、生理作用机制,在女性生殖生理中的重要作用及其相关临床研究及应用。 相似文献
56.
目的:观察支具治疗对女性青少年特发性脊柱侧凸(AIS)患者肺功能的影响。方法:2001年2月~2009年12月283例女性AIS患者在我院接受矫形手术治疗,术前检测患者用力肺活量(FVC)、第1秒用力呼气容积(FEV1),记录预计值、实测值及实测值占预计值百分比。根据术前是否曾接受支具治疗分为2组,支具治疗组80例(A组),未接受支具治疗组203例(B组)。分析2组患者术前肺功能参数的差异,同时对A组患者肺功能FVC及FEV1的实测值占预计值百分比(FVC%、FEV1%)与术时年龄、身高、主弯冠状面Cobb角、主侧凸累及节段数、主胸弯矢状面Cobb角、每日支具治疗时间、支具治疗总时长进行多元线性回归分析。结果:A、B组患者FVC预计值分别为3.23±0.40L和3.20±0.40L,FEV1预计值分别为2.76±0.40L和2.73±0.30L,A组与B组比较均无统计学差异(P>0.05);A、B组FVC实测值分别为2.58±0.60L和2.72±0.60L,FEV1实测值分别为2.34±0.50L和2.49±0.50L,A、B组FVC%分别为(80.3±16.5)%和(85.4±16.5)%、FEV1%分别为(85.6±18.4)%和(91.3±16.9)%,A组FEV1实测值、FVC%及FEV1%较B组均明显降低(P<0.05),其中主弯为胸弯患者(173例)明显(P<0.05),而主弯为胸腰弯/腰弯患者(110例)不明显(P>0.05)。A组患者中,胸段侧凸矢状面Cobb角与FVC%、FEV1%呈正相关(P<0.05),支具治疗总时长与FEV1%呈负相关(P<0.05);而术时年龄、身高、主弯冠状面Cobb角、主侧凸累及节段数、每日支具治疗时间(8~23h,平均18.7h)与FVC%及FEV1%均无显著相关性(P>0.05)。结论:支具治疗可使女性青少年特发性胸段脊柱侧凸患者肺功能FVC%及FEV1%下降,支具治疗总时长和胸段侧凸矢状面Cobb角可能是影响患者肺功能FVC%及FEV1%的相关因素。 相似文献
57.
腹腔镜联合药物治疗轻度子宫内膜异位症合并不孕的疗效分析 总被引:1,自引:0,他引:1
目的探讨腹腔镜手术联合不同药物治疗轻度子宫内膜异位症(内异症)合并不孕的疗效。方法回顾性分析2004年1月~2009年12月110例腹腔镜诊断轻度内异症(r-AFSⅠ~Ⅱ期)合并不孕患者的临床资料,按术后使用药物情况分为2组:避孕药组53例,服用口服避孕药去氧孕烯炔雌醇片(妈富隆)或屈螺酮炔雌醇片(优思明)每天1片×21天,月经来潮第1天开始服药,连用3个月;孕三烯酮组57例,服用孕三烯酮每次2.5 mg,每周2次,连用3个月。比较2组术后妊娠情况和妊娠结局。结果其中104例完成3个月药物治疗,术后随访时间(24.0±8.2)月(11~41个月),妊娠率39.4%(41/104),活产率35.6%(37/104)。术后1年内、1~2年和2年以上的妊娠率分别为26.9%(28/104)、12.2%(9/74)和9.1%(4/44),术后1年的妊娠率明显高于1~2年及2年以上者(χ2=5.721,P=0.017;χ2=5.802,P=0.016)。2组妊娠率[46.0%(23/50)vs.33.3%(18/54),χ2=1.744,P=0.187]和活产率[42.0%(21/50)vs.29.6%(16/54),χ2=1.733,P=0.188]差异无显著性。结论对于合并轻度内异症的不孕患者,腹腔镜联合术后孕三烯酮或口服避孕药治疗均有效改善其生育力。 相似文献
58.
目的 评估女性青少年特发性脊柱侧凸(adolescent idiopathic scoliosis,AIS)患者支具治疗效果及影响因素.方法 2003年7月至2009年7月,完成支具治疗或因侧凸进展而行手术治疗的女性AIS患者142例,初诊时平均年龄为(13.1±1.5)岁,平均主弯Cobb角29.6°±5.4°,平均Risser征为(2.0±1.5)级.定义侧凸畸形进展为末次随访Cobb角大于初诊6°以上或治疗期间建议行矫形手术(Cobb 角>45°),其余为非进展.根据侧凸进展或需手术治疗的比率来评估支具治疗效果.运用卡方检验和Logistic回归分析探讨影响支具治疗效果的因素.结果 平均支具治疗时间为(2.5±1.0)年.按照侧凸进展的定义,进展组为27例(19%),非进展组115例(81%);手术组病例18例(13%),因支具治疗而避免手术病例124例(87%).卡方检验发现侧凸进展组和手术组中以初诊年龄10.0~12.9岁、月经初潮未至、Risser征0~1级、初诊Cobb角>30°以及胸弯型居多.Logistic回归分析发现月经初潮未至(P=0.000)和胸弯型(P=0.012)是支具治疗后侧凸进展的独立预测因素,而初诊Cobb角>30°(P=0.022)是支具治疗期间因侧凸进展而需手术治疗的另一独立预测因素.结论 支具治疗可有效控制多数AIS患者的侧凸进展,而生长发育状态、侧凸严重程度和侧凸类型是影响支具疗效的重要因素.Abstract: Objective To analyze the outcomes of bracing treatment for girls with adolescent idiopathic scoliosis (AIS), and to investigate the predictive factors of the protocol. Methods This study included 142 girls with AIS who finished standardized bracing treatment from July 2003 to July 2009. These patients had a mean age of 13.1±1.5 years, a mean main curve of 29.6°±5.4°, and a mean Risser grade of 2.0±1.5 before bracing treatment. Curve progression was defined that Cobb angle was greater than 6° compared to bracing initiation or was aggravated to more than 45° (indicative for surgery). The outcomes of bracing treatment were assessed based on the ratio of curves of progression or indicative for surgery. Chi-square and Logistic regression Analyses were performed to investigate the predictive factors of bracing treatment. Results The duration of bracing treatment averaged 2.5±1.0 years. Twenty-seven girls with curve progression (19%)and 115 girls (81%) with non-progression were found. Final curve which was greater than 45° was found in 18 girls (13%) who need a correction surgery, the remaining 124 girls (87%) had completed bracing treatment and avoided surgery. Chi-square analyses revealed that curve progression were more common in younger girls with lower Risser grade, with initial larger Cobb angle and with a main thoracic curve pattern.Logistic regression analyses found that premenarchal status and a main thoracic curve pattern were the independent risk factors of curve progression despite bracing. While initial Cobb angle which was greater than 30° was the additional independent risk factor of progression requiring surgery. Conclusion Bracing treatment could effectively prevent curve progression in most girls with AIS. The degree of growth maturity, the pattern and grade of curve are the influencing factor for bracing treatment. 相似文献
59.
目的 探讨经阴道无张力尿道中段吊带术(TVT-S)治疗女性压力性尿失禁(SUI)的有效性及安全性.方法 回顾性分析2008年10月至2010年5月诊治的27例SUI患者的资料.年龄35~77(56.1±10.7)岁;单纯型20例,混合型7例;产次1~6(2.8±1.4)次;体质指数22.0~31.9(25.6±2.5);病程1~30(6.8±7.2)年.有盆腔手术史2例,均无抗尿失禁手术史,膀胱颈抬举试验均阳性;腹压漏尿点压(ALPP)27~120(60.9±27.5)cm H2O;术前ICI-Q-SF评分7~14(11.2±1.8)分.结果 27例均行TVT-S,其中行"U"术式19例,行"H"术式8例.手术时间13~19(15.3±1.4)min.术中无膀胱、尿道损伤,无闭孔血管、神经损伤,术中出血10~50 ml;术后测量最大尿流率4~50(25.4±13.1)ml,残余尿0~95(23.2±7.6)ml.术后发生轻度排尿困难3例(11.1%),出现阴道创口渗液3例(11.1%);术后随访3~21(12.6±6.7)个月,出现尿频、尿急或急迫性尿失禁10例(37.0%),无阴道侵蚀.疗效判定:治愈15例(56%),好转8例(30%),无效4例(1 5%).结论 TVT-S治疗SUI简单易行,操作安全,并发症轻微易治,但手术治愈率较低,长期疗效仍需大量临床和随访资料证明.Abstract: Objective To evaluate the efficacy and safety of the TVT-Secur procedure for female stress urinary incontinence (SUI). Methods Analyze retrospectively the preoperative, intraoperative and postoperative complications and follow-up data of 27 SUI patients from October 2008 to May 2010. 20 cases were simple SUI, and 7 cases were mixed SUI. The average age was 56.1 ± 10.7 years (range, 35-77), the average parity was 2.8-±- 1.4 (range, 1-6), the average body mass index was 25.6±2.5, and the average course of the disease was 6.8±7.2 yeas (range, 1-30). Two cases had past history of pelvic surgery without any anti-incontinence surgery. Mashall-marchett test was positive in all patients, with an average abdominal leak point pressure (ALPP) of 60.9±27.5 cm H2O (range, 27- 120 cm H2O). The mean International Consultation on Incontinence-Short Form (ICIQ-SF) score was 11.2 ± 1.8 (range, 7- 14) before surgery. Results 27 patients underwent TVT-Secur procedure, of which 19 cases underwent "U" procedure, and 8 cases underwent "H" procedure. The mean operation time was 15.3±1.4min (range, 13- 19 min). There were no intraoperative bladder or urethral injury, and no obturator vessel or nerve damage. The blood loss was 10 to 50 ml, and the maximum urinary flow rate was 25. 4±13. 1 ml (range, 4-50 ml). Three eases had mild dysuria(11. 1%), and 3 cases had wound effusion(11. 1%). Followed up for 12. 6 ±6. 7 months (range, 3-21 months). 10 cases complained of bladder overactivity symptoms such as frequency, urgency, and urge incontinence, and no case had vaginal erosion. Therapeutic efficacy: 15 cases were cured (56%), 8 cases were improved (30%), and 4 cases were ineffective (15%). Conclusions TVT-Secur procedure is a simple, safe and minimally invasive surgery, while the cure rate is low. The long-term efficacy needs great amount of clinical data and long-term follow-up to prove. 相似文献
60.
BackgroundThe purpose of this study was to characterize beliefs and practice patterns for breast cancer reconstruction among physicians who treat patients with breast cancer, in order to delineate current clinical practice. This survey was administered prior to Cancer Care Ontario guideline publication.MethodSurvey questions addressed four domains: survival, delayed or obscured recurrence detection, delayed adjuvant therapy, and aesthetics. The survey was administered to 1160 Ontario plastic and general surgeons and radiation and medical oncologists. Data were compared to published guidelines.ResultsThe overall response rate was 48%, with 57% of respondents treating breast cancer. Of those treating breast cancer, 75% are affiliated with an academic center. Immediate breast reconstruction (IBR) is not available to 28%. Autologous reconstruction is thought to interfere with recurrence detection by 23% (oncologists 30%, surgeons 19%, p = 0.04). For patients not expected to require radiation therapy, IBR is not supported by 30%. Autologous IBR is believed to delay delivery of adjuvant chemotherapy by 45% (oncologists 55%, surgeons 41%, p = 0.02). Up to 42% of respondents believe delays in adjuvant therapy delivery following IBR are due to insufficient health care resources (ie. coordinating an oncologic and reconstructive surgeon). Radiation therapy following reconstruction is believed to have negative aesthetic outcomes, and increase the need for revision surgery.ConclusionsUnfavourable beliefs about certain clinical actions do not align with recent provincial guideline recommendations. Insufficient healthcare resources are perceived to be a significant barrier to IBR and timely care. 相似文献