全文获取类型
收费全文 | 77847篇 |
免费 | 5439篇 |
国内免费 | 1665篇 |
专业分类
耳鼻咽喉 | 3106篇 |
儿科学 | 931篇 |
妇产科学 | 1525篇 |
基础医学 | 1982篇 |
口腔科学 | 3156篇 |
临床医学 | 7720篇 |
内科学 | 7551篇 |
皮肤病学 | 707篇 |
神经病学 | 2580篇 |
特种医学 | 1301篇 |
外国民族医学 | 21篇 |
外科学 | 26575篇 |
综合类 | 10506篇 |
现状与发展 | 7篇 |
一般理论 | 2篇 |
预防医学 | 2812篇 |
眼科学 | 4651篇 |
药学 | 3115篇 |
167篇 | |
中国医学 | 861篇 |
肿瘤学 | 5675篇 |
出版年
2024年 | 261篇 |
2023年 | 2116篇 |
2022年 | 3245篇 |
2021年 | 4240篇 |
2020年 | 4233篇 |
2019年 | 3592篇 |
2018年 | 3436篇 |
2017年 | 2930篇 |
2016年 | 2931篇 |
2015年 | 2996篇 |
2014年 | 5922篇 |
2013年 | 5490篇 |
2012年 | 4427篇 |
2011年 | 4665篇 |
2010年 | 3711篇 |
2009年 | 3523篇 |
2008年 | 3373篇 |
2007年 | 3356篇 |
2006年 | 2916篇 |
2005年 | 2563篇 |
2004年 | 2222篇 |
2003年 | 1773篇 |
2002年 | 1400篇 |
2001年 | 1328篇 |
2000年 | 1142篇 |
1999年 | 1042篇 |
1998年 | 863篇 |
1997年 | 834篇 |
1996年 | 616篇 |
1995年 | 506篇 |
1994年 | 443篇 |
1993年 | 356篇 |
1992年 | 303篇 |
1991年 | 301篇 |
1990年 | 207篇 |
1989年 | 203篇 |
1988年 | 200篇 |
1987年 | 200篇 |
1986年 | 161篇 |
1985年 | 173篇 |
1984年 | 169篇 |
1983年 | 109篇 |
1982年 | 125篇 |
1981年 | 98篇 |
1980年 | 78篇 |
1979年 | 45篇 |
1978年 | 33篇 |
1977年 | 34篇 |
1976年 | 25篇 |
1975年 | 20篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
巨块型宫颈癌术前放疗20例临床观察 总被引:4,自引:0,他引:4
[目的]探讨较早期巨块型宫颈癌术前适当剂量阴道腔内放疗的意义。[方法]经宫颈活检病理检查确诊,宫颈肿块4cm-7cm的Ⅰb2期和Ⅱa期宫颈癌患者20例,采用后装治疗机阴道腔内放射源为^192铱(^192Ⅰr),A点剂量为2100cGy-2400cGy,分3-4次照射,每次间隔3—4天,放疗前、放疗后和手术前经阴道窥器肉眼观察测量和B超探查综合观察肿块变化情况。[结果]宫颈肿块均有不同程度的缩小,有效率90%,放疗结束后7-10天19例行宫颈癌根治术。手术标本病理检查4例已无癌细胞,2例散在退变癌细胞,其余同术前。[结论]较早期巨块型宫颈癌行宫颈癌根治术前适当剂量腔内放疗,使肿瘤缩小,有利于手术进行,不增加手术副损伤和并发症。 相似文献
992.
逆行肝切除治疗难切性肝癌244例报道 总被引:3,自引:0,他引:3
目的 逆行肝切除是治疗难切性肝癌的有效方法 ,本文报道了 2 44例临床经验。方法 常规肝切除方法切除困难的 2 44例巨大、显露困难或下腔静脉受累的肝癌采用逆行切肝法结合血管外科技术予以切除 (A组 ) ,同期临床特征类似的 31例肝癌采用常规切肝法切除 ,作为对照 (B组 )。结果 两组均无手术死亡 ,A组与B组相比 ,术中出血量较少 ( 12 90± 998ml比 2 2 86± 136 3ml)、术后胸水发生率 ( 2 6 /2 44比 10 /31)、腹水发生率 ( 72 /2 44比 19/31)、中度到重度黄疸率 ( 14 /2 44比 5 /31)、手术区积液率 ( 17/2 44比 7/31)、膈下感染率 ( 3/2 44比 1/31)、胆漏发生率 ( 2 /2 44比 1/31)、切口感染率 ( 3/2 44比 1/31)以及ALT恢复时间 ( 13.8± 5 .1天比 18.9± 8.9天 )均较低 ,差别具有统计学意义 (P <0 .0 1)。结论 对于难切性肝癌而言 ,逆行肝切除是安全有效的手术方法。 相似文献
993.
2340例胰腺癌临床病例分析 总被引:3,自引:0,他引:3
目的 探讨提高胰腺癌治愈性切除相关因素和获得更佳疗效。方法 中国抗癌协会胰腺癌专业委员会回顾性分析了8省2市14大医院的1990年-2000年诊治的2340例胰腺病例。多因素生存分析采用Cox比例风险模型找出可能影响胰腺癌病人预后的独立因素。单因素生存分析用寿命表法计算,以生存曲线描述生存率,并进行Gehan比分检验。结果 COX单因素分析表明在a=0.05水平上有意义的有年龄、职业、病程、肿瘤部位、手术方式、术后胰瘘、术后肝衰、化疗、TNM分期、免疫治疗、有无肝转移、肠系膜上血管有无侵犯等变量。COX多因素分析表明在a=0.05水平上有意义的有患者年龄、手术方式、术后胰瘘、术后肝衰、化疗、免疫治疗等变量,这些变量为影响胰腺癌预后的独立因素。根治性手术者相对于未手术者,以及化疗、免疫治疗均为保护性因素。其中40岁以上的占了92.91%,40岁以下的仅占7.09%。胰头癌根治性手术组中位生存时间为 17.11个月,1年、3年和5年生存率分别为54.36%、13.47%、8.47%。结论 有必要将40岁以上的人群视为高危人群,能及时发现早期病例。各种综合治疗措施的结合都将有助于改善胰腺癌患者的生活质量和延长生存期。 相似文献
994.
995.
Laparoscopic Assisted Surgery for Crohn''''s Disease an Initial Experience and Results 总被引:2,自引:0,他引:2
栾晓军 《华中科技大学学报(医学英德文版)》2000,20(4)
SurgicaltreatmentisoftenrequiredforpatientswithCrohn'sdiseasewhohaveintestinalstrictureand/orfistula[4.1o.13].Rapidevolutionoflaparoscopicintestinalsurgery,continuousadvancementofinstru-mentation,performanceofmoreextensiveandcom-p1exprocedureshaveledtotheapplicationoflaparo-scopictechniquesinthetreatmentofCrohn'sdis-ease[3'9'12J.Recentreportshavedemonstratedthat,comparedwithtraditional"open"resection,laparo-scopicintestinalsurgeryresultsindecreasedpostoper-ativepain,earlierreturnofintestinalf… 相似文献
996.
经上颌窦前壁钻孔行鼻窦内窥镜术30例报告 总被引:1,自引:0,他引:1
报告经上颌窦前壁钻孔行鼻窦内窥镜手术30例,疗效较好。与鼻腔、鼻窦内窥镜手术比较,该术式具有观察方便,出血少,反应轻,操作方便,并发症少,术后复发率低等优点。 相似文献
997.
During mastoid surgery there is a risk to the facial nerve and hearing but at present it is unclear how substantial this risk is. This information is necessary for adequate informed consent to be given, as consent requires information about both the potential risks of the surgery as well as the risks of leaving the disease untreated. The aim of this study is to establish the risks of mastoid surgery and the incidence of complications as a consequence of mastoid disease. The records of all patients undergoing mastoidectomy between 1985 and 1994 were reviewed for preoperative and intra-operative complications. Preoperatively there were 21 (2%) facial nerve palsies, 67 (6.5%) dead ears and 58 (5.7%) intracranial complications of the mastoid disease. If this risk is extrapolated for the population of the Western Cape over a 40-year period (average expected life-span after presentation), the risk of developing a serious complication (facial palsy, dead ear or intracranial) from mastoid disease during this period was 3.8%. The incidence of intra-operative iatrogenic facial nerve palsy was 1.7% (n = 17) and of dead ear was 1.7% (n = 17). Although the comparative risk of developing a severe complication from untreated disease was similar to the risks of surgery (facial palsy, dead ear), the number (58) of intracranial life-threatening preoperative complications presenting in the 10-year period reviewed was significant. These figures provide a base from which otologists can inform patients about the possible risk of mastoid surgery as well as allowing these risks to be compared with the risks of leaving the disease untreated. 相似文献
998.
We present the first use of tubeless superimposed combined high- and low-frequency jet ventilation (SHFJV) with a jet laryngoscope in laryngotracheal surgery in infants and children. Twenty-eight patients underwent 53 operative procedures. The average age of the patients was 7.3 years. The most common diagnoses were laryngeal papillomatosis and subglottic stenosis. The duration of jet ventilation averaged 33 min. The gas exchange was sufficient in each case. The advantages of SHFJV in the surgery of the laryngotracheal area in infants and children are optimal view at the larynx and trachea, maximum space for the handling, application of the laser without risks, no time limitation, suitability for stenosis, and neither anesthetic nor surgical complications. 相似文献
999.
Augusto Ferrari MD Luigi Frigerio MD 《American journal of obstetrics and gynecology》1997,177(6):1426-1431
OBJECTIVE: We describe an alternative sling procedure that permits concomitant correction of urethral hypermobility and urinary incontinence through a single surgical exposure. STUDY DESIGN: Fifteen women with severe urinary stress incontinence and urethral hypermobility underwent a sling procedure by creation of a simple triangular patch from the anterior vaginal wall. RESULTS: The mean operative time for the vaginal sling procedure was 38 minutes (range 29 to 65 minutes) in addition to other operations. The mean postoperative hospital stay was 7.7 days (range 5 to 13 days) and all patients were routinely discharged with an indwelling Foley catheter. Spontaneous micturition occurred in 12 patients after a mean period of 25 days (range 13 to 36 days). In three cases long-term catheterization was necessary. By subjective and objective evaluations, all the patients were cured of their stress incontinence. CONCLUSION: The triangular vaginal patch with the single sutures on each side provides an alternative approach for bladder neck stabilization that may permit a more anatomic suspension of a hypermobile urethra.(Am J Obstet Gynecol 1997;177:31) 相似文献
1000.
Robert L. Harris MD Geoffrey W. Cundiff MD James P. Theofrastous MD Haewon Yoon MD Richard C. Bump MD W.Allen Addison MD 《American journal of obstetrics and gynecology》1997,177(6):1367-1371
OBJECTIVE: Our goal was to evaluate the role of intraoperative cystoscopy during surgery for pelvic organ prolapse and urinary incontinence. STUDY DESIGN: Charts of 224 consecutive patients who had intraoperative cystoscopy performed after urogynecologic surgery were reviewed. RESULTS: Nine injuries occurred that were unsuspected before cystoscopy, for an incidence of 4%. Six ureteral ligations occurred, four after Burch cystourethropexy and two after vaginal culdoplasty. Intravesical sutures were noted after two Burch procedures, and another injury occurred with passage of fascia lata through the bladder during a pubovaginal sling procedure. Eight injuries were managed by removal and replacement of the suture or sling with only one requiring ureteroneocystotomy. When patients with injuries were compared with those without, there were no statistical differences in demographic or surgical parameters. CONCLUSIONS: The potential for damage to the lower urinary tract is significant with complex urogynecologic surgery. Because of the increased and delayed morbidity associated with unrecognized injury, intraoperative surveillance cystoscopy should be considered a part of all such procedures.(Am J Obstet Gynecol 1997;177:71) 相似文献