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   2543篇
  免费   251篇
  国内免费   149篇
儿科学   12篇
妇产科学   5篇
基础医学   114篇
口腔科学   6篇
临床医学   167篇
内科学   693篇
皮肤病学   12篇
神经病学   25篇
特种医学   47篇
外国民族医学   4篇
外科学   954篇
综合类   413篇
预防医学   45篇
眼科学   3篇
药学   91篇
  4篇
中国医学   16篇
肿瘤学   332篇
  2024年   5篇
  2023年   46篇
  2022年   84篇
  2021年   126篇
  2020年   134篇
  2019年   122篇
  2018年   102篇
  2017年   104篇
  2016年   143篇
  2015年   86篇
  2014年   178篇
  2013年   154篇
  2012年   127篇
  2011年   152篇
  2010年   135篇
  2009年   137篇
  2008年   116篇
  2007年   162篇
  2006年   109篇
  2005年   127篇
  2004年   60篇
  2003年   64篇
  2002年   60篇
  2001年   33篇
  2000年   42篇
  1999年   40篇
  1998年   34篇
  1997年   50篇
  1996年   35篇
  1995年   34篇
  1994年   37篇
  1993年   10篇
  1992年   9篇
  1991年   19篇
  1990年   13篇
  1989年   9篇
  1988年   9篇
  1987年   6篇
  1986年   7篇
  1984年   3篇
  1983年   2篇
  1982年   2篇
  1981年   3篇
  1980年   1篇
  1979年   2篇
  1978年   3篇
  1977年   2篇
  1976年   2篇
  1975年   1篇
  1969年   1篇
排序方式: 共有2943条查询结果,搜索用时 15 毫秒
11.
目的探究腹腔镜精准肝切除术治疗原发性肝癌的临床效果。方法选择2019年1月—2020年6月期间在医院接受腹腔镜肝切除术治疗的80例原发性肝癌患者作为实验分析对象,依据手术治疗方案的不同将患者分为腹腔镜常规肝切除组(对照组)40例和腹腔镜精准肝切除组(观察组)40例,对两组患者手术各项指标、手术前后肝功能指标改善情况及术后并发症发生率进行对比分析。结果观察组患者手术时间明显长于对照组,组间比较进行t检验,差异具有统计学意义(P<0.05);观察组患者术中出血量及术中输血量均少于对照组患者,术后恢复时间明显短于对照组患者,组间比较进行t检验,差异具有统计学意义(P<0.05);术后,两组患者ALT、AST、ALB及TBIL水平均显著降低,组内比较进行t检验,差异具有统计学意义(P<0.05),观察组患者ALT、AST、ALB及TBIL水平降低幅度显著大于对照组患者,组间比较进行t检验,差异具有统计学意义(P<0.05);观察组患者术后并发症发生率为10.00%,对照组患者术后并发症发生率为27.50%,组间比较进行χ2检验,差异具有统计学意义(χ2=4.021;P=0.045)。结论与腹腔镜常规肝切除术比较,腹腔镜精准肝切除术操作精细,手术时间相对较长,患者术中出血量更少,术后恢复时间更短,能够最大限度保护患者的肝脏,减低患者术后并发症发生率,提高手术治疗效果,改善患者预后。  相似文献   
12.
随着腹腔镜肝切除术在国内开展,腹腔镜肝切除术的手术适应证和手术范围在逐渐扩大,外科医生在手术操作过程中的意外和手术风险也逐渐提高。腹腔镜肝切除术中副损伤主要包括胆管损伤、术中出血、膈肌损伤、气体栓塞等。当在术中发生意外损伤时,应立即正确辨别出损伤类型,并迅速采取对应的处理策略,及时处理损伤,避免造成更严重的后果。同时,在术中合理使用吲哚菁绿(ICG)荧光染色及实时超声等辅助技术,可减少术中副损伤的发生。  相似文献   
13.
14.
15.
16.
BackgroundNeoadjuvant yttrium-90 transarterial radioembolization (TARE) is increasingly being used as a strategy to facilitate resection of otherwise unresectable tumors due to its ability to generate both tumor response and remnant liver hypertrophy. Perioperative outcomes after the use of neoadjuvant lobar TARE remain underinvestigated.MethodsA single center retrospective review of patients who underwent lobar TARE prior to major hepatectomy for primary or metastatic liver cancer between 2007 and 2018 was conducted. Baseline demographics, radioembolization parameters, pre- and post-radioembolization volumetrics, intra-operative surgical data, adverse events, and post-operative outcomes were analyzed.ResultsTwenty-six patients underwent major hepatectomy after neoadjuvant lobar TARE. The mean age was 58.3 years (17–88 years). 62% of patients (n=16) had primary liver malignancies while the remainder had metastatic disease. Liver resection included right hepatectomy or trisegmentectomy, left or extended left hepatectomy, and sectorectomy/segmentectomy in 77% (n=20), 8% (n=2), and 15% (n=4) of patients, respectively. The mean length of stay was 8.3 days (range, 3–33 days) and there were no grade IV morbidities or 90-day mortalities. The incidence of post hepatectomy liver failure (PHLF) was 3.8% (n=1). The median time to progression after resection was 4.5 months (range, 3.3–10 months). Twenty-three percent (n=6) of patients had no recurrence. The median survival was 28.9 months (range, 16.9–46.8 months) from major hepatectomy and 37.6 months (range, 25.2–53.1 months) from TARE.ConclusionsMajor hepatectomy after neoadjuvant lobar radioembolization is safe with a low incidence of PHLF.  相似文献   
17.
目的 探讨联合肝脏分隔和门静脉结扎的二步肝切除术(ALPPS)治疗巨大原发性肝癌(PLC)患者的近远期疗效。方法 2016年1月~2018年2月我院诊治的98例巨大PLC患者,其中20例接受ALPPS治疗(A组),38例在经肝动脉化疗栓塞术( TACE)治疗后手术切除肿瘤(B组),和40例接受直接手术切除肿瘤(C组)。术后,行CT增强扫描,应用IQQA-Liver肝脏CT解读分析系统进行肝脏三维重建,测量全肝体积( TLV)、残余肝脏体积(RLV)、术后3个月肝脏体积(FRLV),计算肝增生体积和肝增生率。结果 术后,A组FRLV为(366.3±31.7)mL,显著大于B组【(185.2±16.4)mL或C组(181.9±14.2)mL,P<0.05】,肝增生率为(68.8±6.4)%,显著高于B组【(21.4±2.0)%或C组(22.6±2.3)%,P<0.05】; 术后15 d,A组血清白蛋白水平为(37.0±2.7)g/L,显著高于B组【(34.1±2.9)g/L或C组(34.0±3.2)g/L,P<0.05】;A组2 a总生存率为70.0%,无进展生存率为55.0%,B组分别为55.3%和36.8%,C组分别为52.5%和42.5%,三组之间无显著性差异(P>0.05)。结论 ALPPS可使巨大PLC患者术后剩余肝脏体积在短时间内迅速增加,加快了患者术后肝功能的恢复。  相似文献   
18.
BackgroundPartial hepatectomy has been used to treat patients with resectable hepatocellular carcinoma (HCC) which spontaneously ruptured. It is still controversial as to whether emergency partial hepatectomy (EmPH) should be carried out at the time of rupture, or the patients should initially be managed by operative or non-operative treatment to stop the bleeding, followed by staged early or delayed partial hepatectomy when the patient's condition becomes stable.MethodsConsecutive 10-year patients with ruptured HCC managed at our center were included in this study. Patients who underwent partial hepatectomy were further subdivided into the EmPH group, the staged early partial hepatectomy (SEPH) group, and the staged delayed partial hepatectomy (SDPH) group. Univariate and multivariate analyses of factors affecting overall survival(OS) were conducted before and after propensity score matching analyses amongst the included patients. OS, postoperative mortality, recurrence free survival (RFS), and peritoneal metastatic rates were compared. The risk factors of peritoneal metastases were determined using the COX regression analysis.ResultsThe 130 patients who underwent partial hepatectomy were subdivided into the EmPH group (surgery at the time of rupture, n = 30), the SEPH group (surgery ≤ 8 days of rupture, n = 67), and the SDPH group (surgery > 8 days of rupture, n = 33). The remaining 86 patients underwent non-surgical treatment. Partial hepatectomy was an independent predictor of better OS (HR 2.792, P < 0.001). For resectable HCC, the 30-day mortality, OS, and RFS were similar between the EmPH group, and the staged partial hepatectomy (SPH) group which included the patients who underwent SEPH and SDPH. The SEPH group had significantly better OS and RFS. Multivariate COX regression analysis demonstrated that SDPH was strongly associated with postoperative peritoneal dissemination (OR 28.775, P = 0.003).ConclusionPartial hepatectomy provided significantly better survival than non-surgical treatment for patients who presented with ruptured HCC. Early partial hepatectomy within 8 days of rupture which included EmPH (carefully selected) and SEPH, resulted in significantly less patients with peritoneal dissemination and better long-term survival outcomes (especially RFS) than SDPH.  相似文献   
19.
目的 探讨腹腔镜肝切除联合脾动脉结扎术治疗肝癌合并门脉高压症患者的安全性及有效性。方法 2018年2月至2020年2月我院共手术治疗的28例原发性肝细胞肝癌合并肝炎后肝硬化、门脉高压症及脾功能亢进患者,在腹腔镜下先行脾动脉主干结扎、然后再行肝癌的切除,其中局部不规则切除19例、左肝外叶切除9例。回顾性分析患者的一般资料、手术过程、术后恢复及随访结果进行。结果 28例手术均获成功,手术平均时间(102±40)min,术中出血量(71.07±79.41)mL,术后平均住院日(6.93±2.90)d。围手术期无死亡病例。术后无脾脓肿及肝衰竭等并发症发生,有5例腹水、2例胸腔积液、1例胆瘘、1例肺炎,均经非手术治疗后好转出院。白细胞及血小板计数术后1周恢复正常,至术后12个月仍维持在正常范围。截至2021年2月,门诊及电话随访12~36月,肝脏肿瘤再发3例次行射频消融治疗,多发肝内外转移死亡1例,上消化道出血死亡1例,失访1例。结论 腹腔镜下肝癌切除联合脾动脉结扎术治疗肝功能相对较差的肝癌合并门静脉高压症脾功能亢进患者是安全可行的,且具有微创的优势。  相似文献   
20.
Ischaemia reperfusion (I/R) is associated with liver injury and impaired regeneration during partial hepatectomy (PH). The aim of this study was to investigate the effect of thymoquinone (TQ), the active compound of essential oil obtained from Nigella sativa seeds, on rat liver after PH. Male Wistar rats were divided equally into four groups (n = 6) receiving an oral administration of either vehicle solution (sham and PH groups) or TQ at 30 mg/kg (TQ and TQ + PH groups) for 10 consecutive days. Then, rats underwent PH (70%) with 60 minutes of ischaemia followed by 24 hours of reperfusion (PH and TQ + PH groups). Alanine aminotransferase (ALT) activity and histopathological damage were determined. Also, antioxidant parameters, liver regeneration index, hepatic adenosine triphosphate (ATP) content, endoplasmic reticulum (ER) stress and apoptosis were assessed. In response to PH under I/R, liver damage was significantly alleviated by TQ treatment as evidenced by the decrease in ALT activity (P < .01) and histological findings (P < .001). In parallel, TQ preconditioning increased hepatic antioxidant capacities. Moreover, TQ improved mitochondrial function (ATP, P < .05), attenuated ER stress parameters and repressed the expression of apoptotic effectors. Taken together, our results suggest that TQ preconditioning could be an effective strategy to reduce liver injury after PH under I/R. The protective effects were mediated by the increase of antioxidant capacities and the decrease of ER stress and apoptosis.  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