2015医学新闻总结

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1. 1020JAMA杂志刊登了美国癌症协会有关腺摄影筛查的最新指南.该指南强烈推荐在45岁时开始筛查 (JAMA 2015 Oct 20; 314:1599)。
2.1022日新英格兰医学杂志的一项预防皮肤癌研究中, 澳大利亚研究人员患者随机口服烟酰胺或安慰在一年的时间, 他们发现, 所有新的非黑色素瘤皮肤癌的发病率是在烟酰胺组低 (N Engl J Med 2015 Oct 22; 373:1618)
3. 在新英格兰医学杂志最近一项研究研究人员调查了补充钙和维生D低剂量阿司匹林预防结直肠癌的效果他们发现, 腺瘤复发率在治疗组和安慰剂组在3类似 (N Engl J Med 2015 Oct 15; 373: 1519)
 
4. 神经学最近一项研究表明, 遵循地中海饮食可改善认知他们发现, 地中海饮食对脑容量影响的解剖最明显的扣带皮质,顶叶和颞叶和海回 (Neurology 2015 Oct 21; (e-pub))
 
5. 1027JAMA一项初级保健研究中 1100有中度至重度哮喘的黑人患者 除了其目前的吸入皮质类固醇疗法㚈, 被随机分到每日一次的噻托溴铵或每天两次的长效β受体激动剂。他们的结论包括,黑人哮喘患者需要更好的治疗疗法 (JAMA 2015 Oct 27; 314:1720)。
 
6.十月号际肾脏杂志一个多中心研究中, 加拿大研究人员重症急性肾损伤患者随机加速肾脏替代治疗或标准治疗 他们发现, 加速肾脏替代治疗并没有减少90天死亡率或住院时间或3个月肾脏替代治疗的依赖性 (Kidney Int 2015 Oct; 88:897)
7.1022日新英格兰医学杂志的一项研究中, 丹麦研究人员在随机100例中度严重膝关节骨性关节炎患者随机膝关节置换术加随后3个月的非手术治疗或完全非手术治疗 他们发现, 膝关节置换疼痛评分有显著改善, 不良反应更显著, 非手术治疗疼痛评分没有显著改善 (N Engl J Med 2015 Oct 22; 373:1597)
8.1020日的神经学杂志中, 研究人员提供了延迟体位性低血压和体位性低血压患者10年的随访数据 他们发现, 延迟体位性低血压的10年死亡率为体位性低血压的3倍,有进展为体位性低血压和发展为共核蛋白病 (synucleinopathies) 的危险 (Neurology 2015 Oct 20; 85:1362)
9.JAMA内科网站上一项队列研究中, 研究人员调查了老年糖尿病患者放宽 (deintensification)血压和血糖控制率。他发现, 低血压或低血红蛋白患者放宽控制比没有落入类患者略高 (JAMA Intern Med 2015 Oct 26; (e-pub))
 
10.1022发行的血杂志中, 研究人员调查了非贫血年轻女性铁调素 (hepcidin)水平和铁吸收的影响因素。他们发现, 48时 口服元素铁剂量超过60毫克会产生更高的对铁的吸收分数(Blood 2015 Oct 22; 126:1981)

2015年医学新闻回顾:中国外科团队将在哈尔滨参与人类首例头移植手术

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2015年医学新闻回顾:中国外科团队将在哈尔滨参与人类首例头移植手术。

2014年医学新闻回顾:中国中医科学家屠呦呦摘取第一颗诺贝尔桂冠

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2015年医学新闻回顾:中国中医科学家获2015年诺贝尔生理学或医学奖,成为摘取诺贝尔科学桂冠第一人。

20151052140546450

北京时间10月5日下午5点30分,2015年诺贝尔生理学或医学奖揭晓,我国科学家屠呦呦获奖!获奖理由是“有关疟疾新疗法的发现”。另外两名获奖科学家为爱尔兰的William C. Campbell和日本的Satoshi ōmura,获奖理由是“有关蛔虫寄生虫感染新疗法的发现”。其中,屠呦呦独享一半奖金,爱尔兰和日本科学家分享另外一半奖金。

2015年最显著的医学研究结果

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2015年最显著的医学研究结果
——杰罗姆·格罗普曼

6月,美国医学研究院建议建立一个国家跟踪系统,这将鼓励旁观者心肺复苏术的教学。
照片由HARAZ N. GHANBARI/美联社提供

每个星期,我阅读十五期左右的期刊,包括一些特色的基础科学、其他的临床研究和病例,还有一些混合的内容。作为一位血液疾病和癌症的专家,在我的领域,我特别关注那些报告的进展和失败。但我也被我的学科之外的医学和生物学方面的工作所吸引。这些研究可能会颠覆传统的思维和实践,或者说他们可以关联到一个人的经历或者一个家庭成员的境况。在2015年医学和生物学的一系列显著发现中,我承认,基于上述标准而优先考虑那些报道,似乎才是最有意义的。
1. 在医院之外接受心肺复苏术
几个月前,我在健康俱乐部的游泳池游泳完之后,路过运动区,看到一个中年男子骑着一个固定的自行车摔倒在地板上。我跑了过去,评估他的状况,确定了他没有脉搏,没有呼吸,并开始实施心肺复苏术。幸运的是,健康俱乐部有一个去纤颤器,同时有一个教练员也携带它赶到了现场。我们对这个中年男子震击了三次,并且持续心肺复苏术直到救护人员的到来。他被送往当地的医院。后来我才得知,由于在他的左主冠状动脉发生堵塞,而导致了心脏病突发。这种类型的心脏病发作被称为寡妇制造者,因为它对大量心肌造成了伤害,而死亡是通常的结果。这名男子得以幸存,并从医院出院实行心脏康复计划。我现在再一次看见了他来健康俱乐部运动。
今年来自瑞典的一份报告强调了心肺复苏术在医院外拯救生命所扮演的角色的重要性。根据《新英格兰医学杂志》上发表的报告研究表明,在救护人员到来之前,旁观者如果抢先急救,伤者三十天存活率为10.5%,相对而言,如果没有这样的抢救措施,存活率就只有4%。今年六月份,美国医学研究院建议建立一个国家跟踪系统,在某种程度上,这将鼓励旁观者心肺复苏术的教学。但是,正如另一份报告和社论指出同样的问题,在这样的设定模式下,我们应该依靠更多的机会——例如,在救护人员到来之前,通过使用智能手机来通知附近需要进行心肺复苏术的人。应用程序可能就可以帮助挽救遭遇中的生命。
2. 减缓艾滋病病毒的传播
在1978年,我从波士顿搬到洛杉开始我的奖学金培训计划。我没想到会在那里遇到一种新的疾病,但在几年后我就有了。这种神秘的疾病,它最初是罕见的,后来被称为艾滋病,很快,导致它的根本原因被确认为艾滋病病毒。到20世纪90年代末,研究人员已经开发出了十几种抗病毒药物。当作为一种所谓的鸡尾酒组合使用时,这些药物已经大大降低了受感染者的死亡率。但行为矫正的巨大的挑战是:艾滋病病毒仍然是通过不安全的性行为来有规律的传播的。
今年,巴黎圣路易斯医院的简·米歇尔·莫丽娜做了一个大胆的临床试验,通过服用抗滤过性病原体药物来观察不安全性行为之前和之后的结果。这样的策略并不完全是像服用避孕药那么简单,但很接近。大约有400人参与了这个研究项目。九个月后,在安慰剂组有14例新的艾滋病病毒感染者——有二百人服用了惰性的药丸——只有2个新出现的感染者,给予了抗滤过性病原体药物。这个试验可以使临床干预适应现实生活中的实际行为,并将为公共卫生提供策略来抑制艾滋病病毒的传播。
3. 一种病毒的传播
今年五月,有一种鲜为人知的、名叫“齐卡”的病毒出现在巴西,并且这种病毒已经被发现在哥伦比亚和苏里南。最早是在1947年乌干达的齐卡森林猕猴中发现。在经过鉴定后的半个世纪中,有报道称,在非洲和东南亚的所有病例中,有该病例的患者不到十五例。在2007年,这种病毒在密克罗尼西亚爆发,有近四分之三的人口显示具有抗体。由于“齐卡”病毒是由蚊子传播,全球卫生官员预计,它将很快出现在美洲中部地区和加勒比地区;在那之后,它可能到达我们的海岸只是一个时间问题。这种病毒属于黄病毒科,其中还包括登革热和黄热病。这种病毒的感染者往往需要住院治疗,同时有些人患有吉兰-巴雷综合征,其身体的免疫系统会刺激神经。使用杀虫剂已经很难控制携带“齐卡”病毒的蚊子了,但是科学家们可以使用一种叫“CRISPR”的基因编辑工具,这种工具可以让不育男性繁殖。在过去,类似的策略减少了昆虫的种群和他们所携带的疾病。
4. 基因组学
21世纪初,当人类基因组被解码破译时,一些科学家预测,战胜众多疾病的时候到来了。但是,随着每一次的发现,会有因为新的知识将如何使用而产生的不可预测性。当然,医学会不断进步,但是他们会属于哪一种疾病的领域呢?九年前,华盛顿大学医学院的研究人员,在圣路易斯报道,在PCSK9基因的特定变异组中有非常低水平的低密度脂蛋白(“坏的”)胆固醇。这显著降低了胆固醇和其他物质致动脉病变而患动脉粥样硬化冠状动脉心脏病的风险。在过去,科学家们倾向于关注药物的研发,来阻止有害基因突变的影响。然而今年,美国食品和药品监督管理局批准了模仿保护PCSK9基因突变作用的药物治疗,来将其好处给予持续高胆固醇患者。
5. 癌症阻断
慢性淋巴细胞性白血病,是一种常见的血液癌症,主要发生于老年人身上,但有时也会发生在年轻人当中。它的发病机理通常开始是缓慢的,但是随后可以加快病情恶化,阻塞肝、脾和骨髓的正常运转造成衰弱和死亡,同时阻碍生成正常的血细胞。治疗慢性淋巴细胞性白血病的经典方法是化疗有毒恶性肿瘤细胞,最常用的药物为苯丁酸氮芥。这是一个稳妥的有益的疗效,通常需要一年左右的消退过程。在过去的十年里,科学家们一直在探索细胞如何相互沟通,从外部接收信号和传输,然后通过一连串的分子,到他们的内部。针对这些分子可以使治疗变得更加具体化,同时使毒性更少。这个月,在《新英格兰医学杂志》上,一群肿瘤学家报道了这种策略在应对慢性淋巴细胞性白血病上的成功。他们证明了一种名为“ibrutinib”的药物,干扰了信号分子“BTK”,对慢性淋巴细胞性白血病患者产生了持久深度的缓解作用。而且,其疗效往往持续到超过临床试用期结束,同时复发的概率很低。针对许多癌症的一个挑战是,它们有冗余通信系统;当一个信号通路被切断时,另一个仍然可以传递信息,来使恶性肿瘤生长和分化。不过有的时候,比如在“ibrutinib”药物的情况下,断开一个网络可能会导致发生戏剧性的改善。
6. 复制的危机
我对“开放科学合作”的争论引起了兴趣,这是一个由试图对在各种领域中发表的研究结果进行重现的研究者组成的零散团队。作为实验室的负责人,我知道这是多么的令人畏惧。即便是技术规格上最微不足道的偏差——培养细胞,定量蛋白,检测核糖核酸——都可以使一个实验难以被复制。一个基础科学实验室就如同我的一样,与人体相比,是一个相对受控的环境,所以要从临床研究,特别是涉及心理和行为的实验中确定结果,就更难了,这一点不足为奇。8月份,“开放科学合作”报道已经重新尝试了一组从认知心理学和社会心理学领域的研究,并且未能重现近三分之二领域的结果。这不应该被视为一个原来的研究人员要么是草率的或者不诚实的迹象。但它确实表明,我们应该用怀疑的眼光看待这样的结果,特别是因为心理学实验研究过快的被兜售给普通媒体吹捧,来揭示我们本性的基本真理。
7. 安慰剂的力量
因为个人和专业的原因,我很着迷于安慰剂效应。遭受了失败的背部手术,我的腰椎疼痛有很多年了。从我的一部分经验看,是如何与熟练的康复专业人员之间进行互动交流,即便在任何物理方法介入之前,这可以缓解我的一些痛苦。作为从人类学到基因组学之间研究者的节点,泰德·卡普特楚克是阐明安慰剂效应的先驱。今年,他和他的同事发表了一篇论文,突显人们在基因方面倾向于,或抵抗安慰剂效应的可能性。相关的基因控制分子,来塑造我们的情绪和目标驱动行为。同样在今年,卡普特楚克把它发表在了安慰剂伦理学中,而医师曾例行公事地规定这对于疾病来说是没有补救作用的。他和他的合著者强调,安慰剂效应是如何产生的,这不仅是来源于从一个瓶子里吞了一颗惰性药丸,而且根据我的经历,还来源于患者和治疗者之间的亲密互动中。阅读这些文章,我不禁回忆起了一个出现在2003年《洋葱》的标题:“美国食品和药品监督管理局批准销售安慰剂处方。”

新闻新闻-2

admin Posted in 2015.04, 医学新闻
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新闻-4

  1. Updated recommendations from the Advisory Committee on Immunization Practices, which appear in the February 3 Annals of Internal Medicine recommended that all adults equal or greater than 65 year of age receive 13-valent pneumococcal conjugate vaccination and 23–valent pneumococcal polysaccharide vaccination.
  2. A long term follow–up study in the March 15 Clinical Infectious Disease monitored the benefits of the herpes zoster vaccine over time, and found that, by year 10, efficacy against herpes zoster virus had failed to 14%.
  3. A study in the March Journal of Allergy and Clinical Immunology found that, among 70,000 patients with documented allergy to penicillin who received a cephalosporin, the most common adverse reaction was nonallergic reaction.
  4. Based on the findings of a 5–year study of thyroid nodules in the March 3 JAMA, editorialists suggest that repeated ultrasonography is unnecessary in patients with benign fine-needle aspirate on baseline examination and no suspicious feature ultrasonography.
  5. The study on the website of JAMA Dermatology demonstrates that patients diagnosed with bullous pemphigoid have no excess risk for malignancy.
  6. Three recently published reports (December 4, 2014 New England Journal of Medicine: March 3, 2015 Journal of American College of Cardiology: Feb 28, 2015 The Lancets ) comparing the risks and benefits of dual antiplatelet therapy to those aspirin alone found that dual therapy was associated with no significant mortality benefit.
  7. A study in the website of The Lancets Neurology compared antiplatelet therapy to anticoagulant therapy in patients with extracranial carotid  or vertebral artery dissection. Anticoagulation was found to be potentially beneficial for patients with angiographically documented thrombosis.
  8. Two randomized controlled trials(ESCAPE and EXTEND-IA)in the March 12 New England Journal of Medicine assessed the benefits of endovascular therapy in patients with acute ischemic stroke, documented occlusion of the internal carotid artery or proximal middle cerebral artery branches, and salvageable brain tissue visible on computed  tomographic perfusion imaging. These trials were stopped early due to internal analysis showing significantly  higher rates of good outcomes in patients who receive endovascular therapy and significantly

lower mortality in patients who received endovascular therapy.

  1. 2月3日内科年鉴杂志发表了免疫咨询委员最新建议, 所有等于或大于65岁的成年人均需接受13价肺炎球菌结合疫苗和23价肺炎球菌多糖疫苗 (Ann Intern Med 2015 Feb 3; 162:214)。
  1. 3月15日临床感染性疾病杂志发表了长期随访监测带状疱疹疫苗益处结果。他们发现, 到了苐十年疫苗的保护功效未能到14% (Clin Infet Dis 2015 Mar 15; 60:900)。
  1. 三月的过敏和临床免疫学杂志的研究发现,在70000例证明对青霉素过敏,接受了头孢菌素的患者中,最常见的不良反应是非过敏性反应 (J Alergy Clin Immunol 2015 Mar; 135:745)。
  1. 基于3月3日JAMA 5年的甲状腺结节研究结果,编辑们建议, 反复超声检查对于细针穿刺良性,无可疑超声检查的患者是不必要的 (JAMA 2015 Mar 3; 313:926)。
  1. JAMA皮肤科网站上的研究表明,诊断为大疱性类天疱疮的患者, 恶性肿瘤的风险并不增加 (Jama Dermatol 2015 Feb 11; (e-pub))。
  1. 最近发表的报告比较了双重抗血小板治疗与单独使用阿司匹林治疗的风险和益处。 他们发现双重治疗并不显著降低死亡率 (N Engl J Med 2014 Dec; 371: 2155)。
  1. 在刺血针神经内科杂志网站上, 一项研究比较了抗凝治疗与抗血小板治疗颅外颈动脉或椎动脉夹层形成。抗凝治疗被认为是有利于血管造影证实了的血栓形成的患者 (Lancet Neurol 2015 Feb 12; (e-pub))。
  1. 3月12日的新英格兰医学杂志两个随机对照试验评估了血管内机械性除血拴术治疗急性缺血性卒中的益处。结果表明,接受血管腔内机械性除血拴术治疗的患者预后较好死亡率较低 (N Engl J Med 2015 Mar 12; 372:1009)

医学新闻-1

admin Posted in 2015.04, 医学新闻
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  1. In cohort study in February Annals of the Rheumatic Disease, researchers show that, compared with matched controls, patients with psoriatic arthritis who did not receive prescriptions for disease–modifying anti-rheumatic drus had significantly higher risk for major adverse cardiovascular events.
  2. In a retrospective study in the February 24 issue of JAMA, researchers assessed risk for bleeding and adverse cardiovascular events associated with concomitant use of nonsteroidal anti-inflammatory drugs (NSAIDS)(and anti-thrombotic agents in patient who were discharged after first myocardial infarction (MI ). Compared with no NSAID use, fatal and nonfatal adverse cardiovascular events were about 40% more common in patients using NSAIDs, use of NSAIDs with more than 1 antithrombotic drug was associated with twice as many major bleeding events and the addition of NSAIDs to double and triple antithrombotic regimen was associated with an approximately 4–fold higher risk for major bleeding events.
  3. In a retrospective study on the website of the BMJ, researchers determining the rates of hospital readmissions and death during the first–year period after hospitalization for heart failure (HF ), acute MI or pneumonia in patients more than 65 years of age. They found that risks for hospital readmission and death remained significantly elevated for more than 3 months after hospitalization for all 3 groups.
  4. In a study on the website of Neurology, researchers examined the association between giant cell arteritis and varicella–zoster virus (VZV ). Their finding suggest that at least some cases of giant cell arteritis may be might be due to infection with VZV.
  5. In a study in February 26 New England Journal of Medicine, babies  at high risk for developing peanut allergy where randomized to avoidance or regular consumption of peanuts until the age of 5 year. Peanut consumption appears to be protective against development of allergy in children with negative skin test -prick tests at baseline and positive skin- prick tests at baseline but no reaction to oral peanut
  6. In a study on the website of The Lancet, patients with chronic obstructive pulmonary disease and severe airflow obstruction were randomized to receive roflumilast or placebo in addition to their regular regimens of long–acting beta–agonists, inhaled corticosteroids, and long–acting muscarinic antagonists. The addition of roflumilast was associated with modest clinical benefit and  adverse effects.
  7. Findings from a study on the website of the BMJ suggest that the  benefits of moderate consumption of alcohol are more limited than those found in previous studies.
  8. In a study on the website of The BMJ, researchers used a primary care research database to determine optimal strategies for intensifying management of hypertension. The following factors were associated with excessive risk for adverse cardiovascular events and death: Using a systolic blood pressure of 150 mmHg as a threshold for intensifying treatment, time to treatment intensification greater than 1.4 months, time to follow-up greater than2.7 months after treatment intensification.
  9. In a meta–analysis in the February 10 issue of JAMA, researchers evaluate the benefit of lowering blood pressure in patients with type 2 diabetes. They found that reducing systolic blood pressure by 10 mmHg was associated with a decrease of less than 30% in the relative risk for all–cause mortality, adverse cardiovascular events, albuminuria, retinopathy and stroke.
  10. In a study in the February Annals of Neurology, researchers show that, compared with matched controls, patients with breast, colorectal, lung and pancreatic pancreatic cancers  are at significantly elevated risk for ischemic and hemorrhagic stroke during the first 3 months after diagnosis.

1.风湿病杂志一项队列研究表明,没有得到特定抗风湿治疗的银屑病关节炎患者主要心血管不良事件的风险, 与对照组相比显著增高 (Ann Rheum dis 2015 Feb; 74:326)。

2.在2月24日的JAMA上, 一项回顾性研究评估了首次心肌梗死出院后的病人同时使用抗血栓药物和非甾体抗炎药(NSAIDs)不良心血管事件和出血的风险。与没有使用NSAIDS相比,使用NSAIDs的患者致死性和非致死性心血管不良事件多40%,大出血事件增加 2 至 4 倍 (JAMA 2015 Feb 24; 313:805)。

3.在英国医学杂志网站上, 一项回顾性研究评估了超过65岁的患者因心脏衰竭(HF),急性心肌梗死或肺炎住院治疗后的第一年期间再住院和死亡的比率。他们发现,再住院和死亡的风险在所有3组均显著增高 (BMJ 2015 Feb 6; 350:h411)。

4.神经内科杂志网站上的一项研究评估了巨细胞动脉炎和水痘 – 带状疱疹病毒(VZV)之间的关联 (Neurology 2015 Feb 18; (e-pub))。

5.在2月26日的新英格兰医学杂志的一项研究中,有发展花生过敏高风险的婴儿,被随机分配避免或经常食用花生直到5年岁。结果表明, 食用花生可预防儿童发生过敏 (N Engl J Med 2015 Feb 26; 372:803)。

6.在柳叶刀杂志网站上的一项研究中,患有慢性阻塞性肺疾病和严重气流阻塞患者被随机分配接受罗氟司特 (roflumilast)或安慰剂, 除了他们本身使用的长效β受体激动剂,吸入糖皮质激素和长效毒蕈碱受体拮抗剂。结果表明, 加罗氟司特有一定的临床益处和副作用 (lancet 2015 Feb 12; (e-pub))。

  1. 来自英国医学杂志网站上的一项研究结果表明,适度饮酒的好处比以前的研究发现少 (BMJ 2015 Feb 10; 350:h384)。

8.在英国医学杂志网站上的一项研究中,研究人员使用了基层医疗研究数据库,以确定加强高血压管理的最优策略。以下因素都与不良心血管事件和死亡的过度风险有关:采用大于150毫米汞柱作为加强治疗阈值收缩压,强化治疗时间大于1.4个月, 跟进强化治疗时间大于2.7个月 (BMJ 2015 Feb 5; 350:h158)。

9.在2月10日的JAMA上,一项荟萃分析评价了降低2型糖尿病患者血压的益处。他们发现,降低收缩压10毫米汞柱,所有原因死亡率,心血管不良事件,蛋白尿,视网膜病变和中风的相对风险降低30% (JAMA 2015 Feb 10; 313: 603)。

10.神经病学年鉴的一项研究表明,乳腺癌,结肠直肠癌,肺癌和胰腺癌胰腺癌在诊断后的3个月内, 缺血性和出血性中风的风险显著升高 (Ann Neurol 2015 Feb; 77:291)。

医学要问-2

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新闻-2

  1. In a study in the January 8, 2015 issue of Blood, researchers assessed the risk for venous and arterial thrombosis after superficial venous thrombosis. Compared to controls, patients with superficial venous thrombosis are at higher risk for deep venous thrombosis, pulmonary embolism and adverse arterial events.
  1. In a study on the website of The Lancet, researchers compare the effects of statins in women to those in men. Compared with the effects seen in men, statin use in women was associated with similar effects on lipid levels and comparable overall reductions in major vascular events and all-cause mortality.
  1. Based on the findings from a meta-analysis in the January 2015 issue of Mayo Clinic Procedings and a randomized study in the February 2015 issue of Atherosclerosis, coenzyme Q10 should not be recommended for patients with statin-related myopathy, because use is associated with no significant improvements in frequency or severity of muscle symptoms.
  1. In the January 20, 2015 issue of Neurology, a double-blind crossover study compared pregabain with an active placebo (low-dose diphenhydramine) in patients with radiographically confirmed lumbar stenosis and > 3 months of neurogenic claudication. The result indicates that pregabalin did not have any significant therapeutic effects compared with placebo.
  1. In the January 29, 2015 New England Journal of Medicine, a phase II trial compared the selective bradykinin B2-receptor antagonist, icatibant, with usual care for the management of angioedema of the upper aerodigestive tract induced by angiotensin –converting-enzyme inhibitors. Compared with patients who received usual care, those who received icatibant had significantly shorter times to the full resolution of angioedema and were more likely to have full resolution of their symptoms within 4 hr.
  1. In the January 13, 2015 issue of JAMA, data from the Wisconsin Sleep Cohort Study are used to assess risk for development of obstructive sleep apnea (OSA) in individuals with and without asthma. Their results suggest that asthma is associated with increased risk for OSA independent of body-mass index (BMI).
  1. In a retrospective study in the January 27, 2015 issue of Neurology, researchers analyzed data on 200 patients with s confirmed diagnosis of acute encephalitis seen at a tertiary care medical center in Minnesota. Their findings  indicate that etiology remained unknown in 30% of cases.
  1. In a meta-analysis in the January 6, 2015 Annuals of Internal Medicine, researchers compared the efficacies of several pharmacologic options for the initial treatment of osteoarthritis of the knee. They found that intra-articular hyaluronic acid was the most effective agent for pain.
  2. In a population-based, retrospective cohort study in the December 2014 American Journal of Gastroenterology, researchers estimated that annual incidence of esophageal cancer in patients with Barrett esophagus is <0.5%.
  1. In a trial in the January 29, 2015 New England Journal of Medicine, researchers randomized women with singleton pregnancies and hypertension (preexisting or gestational) to a diastolic blood pressure (BP) target of either 85 mmHg or 100 mmHg. Women randomized to tighter control BP had less risk of developing abnormally  low platelet counts or elevated liver function tests.

 

1.2015年1月8日血液杂志的一项研究评估了浅静脉血栓形成后深静脉和动脉血栓形成的风险。与对照组相比,浅静脉血栓患者形成深静脉血栓,肺栓塞和不良动脉事件的风险较高 (Blood 2015 Jan 18; 125:229)。
2.在柳叶刀杂志网站上的一项研究中,研究人员比较了他汀类药物在男性和女性的疗效。结果表明, 他汀类药物降低血脂水平, 减少主要血管事件和全因死亡率的效果在男性和女性相似 (Lancet 2015 Jan 8; (e-pub ahead of print))。
3.基于2015年1月梅奥诊所学报和2015年2月的动脉粥样硬化杂志的研究结果,辅酶Q10不应被推荐治疗他汀类药物相关性肌病。因为使用辅酶Q10对改善肌肉症状的频率和严重程度效果不显著 (Mayo Clin Proc 2015 Jan; 90:24) (Atherosclerosis 2015 Feb; 238: 329)。

  1. 在2015年1月20日神经学期刊上,一项双盲交叉研究比较了普瑞巴林 (pregabalin)治疗影像学证实的腰椎狭窄,>3个月神经性跛行患者的疗效。结果表明,普瑞巴林与安慰剂相比, 没有任何显著的治疗效果 (Neurology 2015 Jan 20; 84:265)。

5.在2015年1月29日的新英格兰医学杂志上,一项II期临床试验比较了选择性缓激肽B2受体拮抗剂艾替班特 (icatibant),与常规治疗对血管紧张素-converting酶抑制剂引起的上呼吸消化道血管性水肿的疗效。与常规治疗相比,接受艾替班特的患者,血管性水肿消除时间缩短, 更有可能在4小时内症状全部消除 (N Eng J Med 2015 Jan 29; 372: 418)。
6.在2015年1月13日JAMA杂志上,一项研究用来自威斯康星睡眠队列研究数据,来评估有和没有哮喘的患者发生阻塞性睡眠呼吸暂停(OSA)的风险。结果表明,哮喘的患者发生阻塞性睡眠呼吸暂停(OSA)的风险增加, 与体重指数(BMI)无关 (JAMA 2015 Jan 13; 313:156)。

  1. 在2015年1月27日的神经学期刊一项回顾性研究中,研究人员分析了在明尼苏达州的三级医疗中心确诊的200例急性脑炎数据。结果表明, 30%的病例病因不明 (Neurology 2015 Jan 27; 84: 359)。

8.2015年1月6日内科年鉴一项荟萃分析,比较了几种初步治疗膝关节骨性关节炎的药物的疗效。他们发现,关节内透明质酸是对疼痛最有效一项药物 (Ann Intern Med 2015 Jan 6; 162:46)。
9.在2014年12月美国胃肠病学杂志一项以人群为基础一项回顾性队列研究中,研究人员估计, Barrett食管患者食管癌年发病率<0.5% (Am J Gastroenterol 2014 Dec; 109:1862)。
10.在2015年1月29日的新英格兰医学杂志的试验中,研究人员将单胎妊娠高血压(预先存在或妊娠高血压)的孕妇随机分配到舒张压(BP)的目标85毫米汞柱或100毫米汞柱。血压严格控制组发生异常血小板计数降低或肝功能升高的风险较小 (N Engl J Med 2015 Jan 29; 372:407)。

医学要问

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新闻-1

  1. In the December 24 and 31, 2014 issue of JAMA, a systemic review of addresses safety issues associated with metformin therapy in diabetic patients with chronic kidney disease. The review found that in patients with mild to moderate chronic kidney disease, use was associated with slight elevation of lactic acid but these were not clinically worrisome.
  1. In a retrospective study in the December 2014 issue of JAMA Surgery, researchers compared outcomes after lobectomy, sublobar resection, or stereotactic ablative radiotherapy for management of none-small-cell lung cancer in older adults. They found  that unadjusted three-year mortality with highest after stereotactic ablative therapy;  after adjusting for baseline differences between groups, the three-year mortality after ablative radiotherapy was similar to that after lobectomy and 3- month motility was lower in patients who received stereotactic ablative therapy than in those who underwent surgery.
  1. In a meta-analysis on the website of The BMJ, researchers evaluating the association between blood glucose concentration and the risk for pancreatic cancer show a strong linear dose-response relationship.
  1. In a double-blind trial in the January 2015 Annals of the Rheumatic Diseases, patients with early rheumatoid arthritis were randomized to receive either low-dose or high-dose fish oil therapy in addition to their standard triple-therapy disease-modifying regimen. Compared with the low-dose fish oil therapy, height-dose therapy was associated with lower rate of failure of the disease-modifying regimen and shorter time to first remission.
  1. In a study in the January 2015 Annals of the Rheumatic Diseases, researchers evaluated the utility of IgG4 levels in diagnosing IgG4-related disease. They found that an elevated level of IgG 4 is insufficient to diagnose IgG4-related disease.
  1. The relationship between nerve impairment in the lower limbs and subsequent development of mobility problems was investigated in a prospective study in the December 2014 Journal of the American Geriatric Society. The findings suggest that peripheral nerve impairment at baseline he is directly associated with risk for incident disability in all-comers.
  1. In a study in the January 6, 2015 Annals of Internal Medicin, researchers sought to determine whether anticoagulation therapy can be safely discontinued 3-7 months after first unprovoked venous thromboembolism in patients whose D-dimer test is negative. Their findings support  continuation of anticoagulation therapy despite negative D-dimer test unless risk for bleeding is unacceptably high.
  2. In a study in the January 1, 2015 Journal of Infectious Diseases, researchers used a rat model to study the effects of antiplatelet drugs and anticoagulants on the development of endocarditis. The incidence of endocarditis was significantly decreased with Abciximab (anti-glycoprotein IIb/III monoclonal antibody) and aspirin plus ticlopidine.
  1. In a trial on the website of the BMJ, woman more than 55 years of age with mild prolapse of the pelvic organs were randomized to either pelvic floor training or watchful waiting. Pelvic floor training was associated with decrease in urinary and overall symptom scores.
  1. In a meta-analysis on the website of the Annals of Internal Medicine, researchers evaluated the effects of antihypertensive therapy in patients with mild (stage I) hypertension. They show that, in this population of patients, blood pressure-lowering therapy is associated with significant reductions in stroke, cardiovascular-related death,  and overall death.

 

  1. 2014年12月24日JAMA,就二甲双胍治疗合并慢性肾脏病的糖尿病相关的安全问题进行了系统性审查。审查发现,轻中度慢性肾脏疾病的病人,使用二甲双胍与乳酸轻度升高有关,但无临床意义 (JAMA 2014 Dec 24: 312:2668)。
  1. 在2014年12月JAMA外科杂志上, 一项回顾性研究比较了肺叶切除术,部分肺叶切除术,或立体定向消融放疗 (sterotactic ablative radiotherapy)老年非小细胞肺癌的结果。他们发现,立体定向消融治疗未经调整的3年死亡率最高;调整群体间的基线差异后,立体定向消融治疗与肺叶切除三年死亡率相似,但3个月死亡率明显低于手术患者 (JAMA Surg 2014 Dec; 149:1244)。
  1. BMJ网站上一项荟萃分析发现, 血糖浓度和胰腺癌风险之间有强烈的线性剂量 – 反应关系 (BMJ 2015 Jan 2; 349:g7371)。
  1. 在2015年1月风湿性病杂志的一项双盲试验中,接受标准三联疗法的早期类风湿关节炎患者被随机分配接受低剂量或高剂量的鱼油治疗。与低剂量鱼油治疗相比,高剂量鱼油治疗患者三联疗法成功率较高,达到第一次缓解较快 (Ann Rheum Dis 2015 Jan; 74:89)。
  1. 2015年1月风湿性病杂志的一项研究评估了IgG4水平诊断IgG4相关疾病的效用。他们发现,IgG 4升高不足以诊断IgG4相关的疾病 (Ann Rheum Dis 2015 Jan 74:14)。
  1. 2014年12月美国老年病学协会杂志就下肢神经损害和下肢运动功能之间的关系进行了前瞻性研究。调查结果显示,周围神经损伤直接与残疾有关 (J Am Geriatr Soc 2014 Dec; 62:2273)。
  1. 在2015年1月6内科年鉴的研究中,研究人员试图确定第一次无诱因静脉血栓栓塞患者的抗凝治疗是否可以在3-7个月后, D-二聚体检测阴性的前提下,安全地停止。他们的研究结果支持继续抗凝治疗,除非出血风险不可接受 (Ann Intern Med 2015 Jan 6; 162:27)。
  1. 在2015年1月1日传染病杂志上,研究人员利用大鼠模型来研究抗血小板药物和抗凝药物对性心内膜炎发病的影响。心内膜炎的发病率在用阿昔单抗(抗糖蛋白Ⅱb/ III单克隆抗体)和阿司匹林加噻氯匹定 (ticlopidine) 治疗时显著下降 (J Infect Dis 2015 Jan 1; 211:72)。
  1. 在BMJ的网站上的一项研究中,超过55岁的盆腔器官轻微脱垂的女患者被随机分配到盆底训练或观察等待组。盆底训练组尿濒和总体症状均减少 (BMJ 2014 Dec 22; 349:g7378)。
  1. 内科医学年鉴网站上一项荟萃分析评估了轻度(Ⅰ期)高血压患者降压治疗的效果。结果表明, 降血压治疗与显著降低中风,降低心血管相关的死亡,和整体死亡相关联 (Ann Intern Med 2014 Dec 23; (e-pub ahead of print))。

医学新闻 2014

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  1. Findings from a retrospective analysis in the November 5, 2014 issue of JAMA support initiation of the full spectrum of preventative measures to the management of nonobstructive coronary artery disease affecting more than one vessel.
  2. In November 19, 2014 issue of JAMA, researchers compare an investigative therapy (the Watchman device, which is implanted percutaneously and seals the ostium of the left atrial appendage) with warfarin therapy in patients with nonvalvular atrial fibrillation. At 4 years, patients randomized to receive the device had lower rates of hemorrhagic stroke and cardiovascular-related death.
  3. In a controlled crossover feeding study in the December 17, 2014 issue of JAMA, researchers compared 4 diets with different carbohydrate profiles. Compared with a diet low in carbohydrate and with a low total glycemic index, the high-carbohydrate, high-glycemic index diet was associated with significantly increased level of triglycerides.
  4. In a study in the December 15, 2014 issue of Clinical Infectious Diseases, patients treated for hepatitis C infection were followed for a median of 4 years. Among patient who demonstrated spontaneous clearing of the infection or achieved a sustained virologic response, subsequent infection and with a different strain of the virus occurred in more than 25% of patients.
  5. In a study in the December 3, 2014 Journal of Bone and Joint Surgery, researchers assessed the effects of bracing in older adults with single acute thoracic or lumbar vertebral compression fractures. They found the improvement in pain and disability were equal with or without bracing.
  6. On the webside of the Annals of Internal Medicine, an evaluation (by the United States Preventative Services Task Force)of the evidence for screening asymptomatic community-dwelling adults for vitamin D deficiency reaches the conclusion that the harms of treating patients with vitamin D deficiency are small to none.
  7. In a study in the December 14 2014 Journal of Clinical Endocrinology and Metabolism, researchers evaluate the interaction of proton pump inhibitors ( PPIs) with levothyroxine therapy. Based on their findings, it appears that PPIs interfere with the absorption of tablet but not liquid formulation of levothyroxine.
  8. In a case-control study on the website of JAMA Internal Medicine, researchers compared risk for hypoglycemia in patients prescribed tramadol versus codeine for noncancer pain. After adjusting for multiple variables, the risk of hospitalization due to hypoglycemia was significantly higher with tramadol than with codeine.
  9. In a prospective cohort study in the December 2, 2014 Annals of Internal Medicine, researchers evaluated the relationship between diabetes and risk for cognitive decline. During a median follow-up of 19 years, decline in cognitive function scores a showed an association with presence of diabetes, severity and duration of diabetes.
  10. In a study in the January 1, 2015 New England Journal of Medicine, patients with documented proximal arterial occlusion in the anterior cerebral circulation were randomized either to usual care or to endovascular therapy. Rates of recanalization and functional outcomes at 3 months were better in the endovascular therapy group.

 

1.2014年11月5日JAMA一项回顾性分析结果, 支持对影响到不止一个血管的非阻塞性​​冠状动脉疾病实行全面预防措施 (JAMA 2014 Nov 5; 312:17454)。
2.在2014年11月19日的JAMA上,研究人员比较了一项新的疗法(守望装置, 经皮植入和密封左心耳口)与华法林治疗非瓣膜性房颤。4年后, 接受装置的患者出血性中风和心血管相关死亡率较低 (JAMA 2014 Nov 19; 312:1988)。

3.2014年12月17日JAMA比较了4种含不同碳水化合物的饮食。与低碳水化合物, 低总血糖生成指数饮食相比, 高碳水化合物, 高血糖指数饮食, 与甘油三酯水平增高有关 (JAMA 2014 Dec 17; 312:2531)。
4.2014年12月15日临床传染病杂志报告了丙型肝炎患者治疗后4年的随访情况。感染自发清除或实现了持续的病毒学反应的患者, 随后感染不同菌株病毒的机率为25%以上 (Clin Infect Dis 2014 Dec 15; 59:1678)。
5.201412月3日骨关节外科杂志, 评估了老年人单一急性胸腰椎椎体压缩性骨折使用支撑的疗效。结果表明, 有或无支撑对疼痛和残疾的改善都是相似的 (J Bone Joint Surg Am 2014 Dec 3; 96:1959)。
6.内科医学年刊网站上, 评估了(由美国预防服务工作组)筛查无症状的社区居住的成年人维生素D缺乏。 达到的结论是, 治疗患者的维生素D缺乏无害 (Ann Intern Med 2014 Nov 25; (e-pub ahead of print))。

7.在2014年12月14日临床内分泌与代谢杂志上, 研究人员评估了质子泵抑制剂与左甲状腺素的相互反应。结果表明, 质子泵抑制剂干扰甲状腺素片剂的吸收, 而不干扰甲状腺素液体制剂的吸收 (J Clin Endocrinol Metab 2014 Dec; 99:4481)。
8.在JAMA内科杂志网站上一项病例对照研究中, 研究人员比较了曲马多 (tramadol)与可待因治疗非癌性疼痛导致低血糖的风险。在调整多个变量后, 因低血糖住院的风险, 曲马多显著高于可待因 (JAMA Intern Med 2014 Dec 8; (e-pub ahead of print))。
9.2014年12月2日内科年刊一项前瞻性队列研究, 评估了认知功能减退与糖尿病之间的关系。在平均19年的随访里,认知功能下降分数与糖尿病的存在, 糖尿病的严重程度和糖尿病病程的长短有关 (Ann Intern Med 2014 Dec 2; 161:785)。

  1. 在2015年1月1日新英格兰医学杂志一项研究中, 大脑前循环近端动脉闭塞的患者被随机分配接受常规治疗或血管内治疗。3个月后, 血管再通和功能结果以血管内治疗组更好 (N Engl J Med 2015 Jan 1; 372:11) 。

医学要闻

admin Posted in 2015.02, 医学新闻
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  1. The American College of Cardiology and the American Heart Association recently updated joint guidelines on the perioperative evaluation of cardiovascular risk and the management of patients undergoing noncardiac surgery. The new guidelines, which appears on the website of the Journal of the American College of Cardiology, recommend continuing therapy with statin and /or beta blockers in patients taking them chronically as routine practice during the perioperative period.
  1. In an observation a study in the October issue of JAMA Surgery, researchers compared outcomes after noncardiac surgery in patients taking beta blockers chronically. Compared to patients who discontinued beta blocker therapy during the perioperative period, those who continued therapy had lower incidence of major adverse cardiovascular or cerebrovascular events within one month and lower 30-day mortality.
  1. In an observational study on the website of the The BMJ, high consumption of milk only was associated with increased risk for cardiovascular and all-cause death, and elevated biomarkers for oxidative stress and inflammation, of the men and women, and increased risk for fracture in women.
  1. In a study in the October Journal of the American Geriatrics Society, researchers  examined whether use of anticholinergic drugs was associated with a higher risk for hospitalization for altered mental status. They found that risk was significant elevated in patients taking more than one anticholinergic agent.
  1. Results of the survey in the October 21 Annals of Internal Medicine revealed that approximately 20% of primary patient clinicians were unaware of central venous catheters in the patient.
  1. In a retrospective cohort study on the website of JAMA Internal Medicine, initial treatment of type 2 diabetes with metformin was compared to other approaches. Findings of this study include a second anti-diabetic agent was more likely to be required if other classes of anti-diabetic drugs were initially prescribed and initial treatment with sulfonylureas  was associated with excessive risk for new adverse cardiovascular events and for severe hypoglycemia.
  1. In a study on the website of the Journal of Antimicrobial Chemotherapy, researchers compared 2 approaches to managing methicillin-resistant Staphylococcus aureus. Compared with linezolid, combination therapy with rifampicin trimethoprim/sulfamethoxazole was shown to be noninferior with respect to cure rate.
  2. Findings from a retrospective cohort study on the website of JAMA Internal Medicine suggest that, in some patients with newly diagnosed atrial fibrillations, dabigatran therapy may be associated with increased risk for any bleeding, major bleeding and gastrointestinal bleeding, compared with warfarin therapy.
  1. In a study on the website of The Lancet, researchers compare lung-term outcomes in patients with ruptured intracranial aneurysm managed either by neuro surgical clipping or by endovascular coiling. They found that coiling was associated with lower morbidity and mortality.
  1. In a multicenter study on the website of The Lancet, patients with rheumatoid arthritis on stable medical therapy for more than 3 months were randomized to usual care or usual care plus a hand therapy program. Addition of hand therapy was associated with improvements in hand function at 4 months and 1 year, regardless of whether patients were taking biologic antirheumatic drugs.

 

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1.美国心脏病学院和美国心脏协会最近更新了关于围手术期心血管风险评估和非心脏手术病人管理的联合指导方针。新的指导方针刊登在美国心脏病学院杂志的网站上, 建议围手术期病人继续他汀类药物和/或β受体阻滞剂常规治疗 (J Am Coll Cardiol 2014 Aug 1; (e-pub ahead of print))。
2.在JAMA杂志十月刊的一项观察研究中, 研究人员比较了长期服用β受体阻滞剂的病人非心脏手术的结果。相较于手术期停用β受体阻滞剂治疗的患者,继续用药的患者, 一个月内严重心血管或脑血管事件的发病率以及30天死亡率均较低 (JAMA Surg 2014 Oct; 149:1031)。

3.英国医学杂志网站上一项观察性研究发现, 过多地摄入牛奶, 可导致心血管疾病风险和全因死亡率增加, 氧化应激和炎症的生物标志升高,以及女性骨折的风险增加 (BMJ 2014 Oct 28; 349:g6015)。

4.在美国老年学会杂志十月刊的一项研究中,研究人员考察了使用抗胆碱能药物是否与精神状态改变而住院相关联。他们发现,服用一种以上抗胆碱能药的患者这种风险显著升高 (J Am Geriatri Soc 2014 Oct; 62:1916)。

5. 10月21日内科年报调查结果显示, 约20%的临床主治医师不知道所管病人带有中心静脉导管 (Ann Intern Med 2014 Oct 21; 161:562)。
6.JAMA内科网站上一项回顾性队列研究,比较了使用二甲双胍或其他药物作为2型糖尿病的初始治疗。结果显示, 如果使用其他类抗糖尿病药物作为初始治疗, 则更可能需要第二种抗糖尿病药物; 使用磺酰脲类药物作为初始治疗, 新的心血管事件和严重低血糖的风险升高 (JAMA Intern Med 2014 oct 27; (e-pub ahead of print))。

7.抗菌疗法杂志网站上的一项研究, 比较了2种治疗耐甲氧西林金黄色葡萄球菌的方案。利福平 (Rifampicin)与磺胺甲恶唑 (TMP/SMX)组合治疗, 治愈率并不亚于利奈唑胺 (Linezolid) (J Antimicrob Chemother 2014 Sep 10; (e-pub ahead of print))。

  1. JAMA内科的网站上的回顾性队列研究表明,在部分初诊心房纤维性颤动患者, 达比加群的治疗与华法林治疗相比, 可能与任何出血,严重出血和消化道出血风险增加有关 (JAMA Intern Med 2014 Nov 3; (e-pub ahead of print))。

9.在柳叶刀网站上的一项研究中, 研究人员比较了神经外科手术夹闭或血管内卷取(endovascular coiling)治疗破裂颅内动脉瘤的长期疗效。他们发现, 卷取治疗的发病率和死亡率较低 (Lancet 2014 Oct 28; (e-pub ahead of print))。

10.在柳叶刀的网站上一项多中心研究中,类风湿关节炎患者在稳定的药物治疗3个月后,被随机分为常规治疗或常规治疗加手的治疗。结果表明, 常规治疗加手的治疗4个月和1年,无论患者是否服用生物抗风湿药物,手部功能都有攺善 (Lancet 2014 Oct 10; (e-pub ahead of print))。