Eversion

Eversion
  • 文章类型: Journal Article
    目的:比较颈动脉内膜剥脱术补片血管成形术(p-CEA)与外翻式颈动脉内膜剥脱术(e-CEA)及早期心脑血管并发症的相关风险。
    方法:该研究是一项前瞻性随机单盲试验,单心,临床适用,描述性分析和比较。从2021年6月至2023年6月,连续62例颈内动脉有症状和无症状狭窄的患者,入院治疗,并随机分为两组:颈动脉内膜切除术加补片血管成形术和外翻颈动脉内膜切除术。术后30天随访。
    结果:在e-CEA手术过程中,70%的病人有心律失常,在66.7%之后24小时,七天后46.7%和一个月后13.3%。手术期间p-CEA,33.3%的患者有心律失常,24小时后33.3%,7天后13.3%和30天后13.3%的患者。手术期间观察到统计学上的显著差异(Fishersp=0.004)。术后1天,经e-CEA治疗的心律失常患者的手术率有所下降,但仍高于p-CEA后(渔民p=0.010)。
    结论:外翻颈动脉内膜切除术后心律失常的发生频率和分类,各种术后心律紊乱的临床意义及其对患者的长期影响需要通过足够有力的随机对照研究进一步研究.
    OBJECTIVE: To compare carotid endarterectomy patch angioplasty (p-CEA) with eversion carotid endarterectomy (e-CEA) and associated risks of early cardio-cerebrovascular complications.
    METHODS: The study was a prospective randomized single-blind trial, monocentric, clinically applicable, descriptive analytical and comparative. From June 2021 to June 2023, 62 consecutive patients with symptomatic and asymptomatic stenosis of the internal carotid artery, admitted to our department and randomized into two groups: carotid endarterectomy with patch angioplasty and eversion carotid endarterectomy. Follow-up for 30 days after surgery.
    RESULTS: During surgery e-CEA, 70% patients had an arrhythmia, and 24 hours after 66.7%, seven days after 46.7% and month after 13.3%. During surgery p-CEA, 33.3% patients had an arrhythmia, 24 hours later 33.3%, 7 days after 13.3% and 30 days after 13.3% patients. Statistically significant difference observed during surgery (Fishers p=0.004). One day after the surgery rate of patients with arrhythmia that were treated e-CEA has decreased, but it was still higher than after p-CEA (Fishers p=0.010).
    CONCLUSIONS: The frequency and categorization of postoperative cardiac arrhythmias after eversion carotid endarterectomy, the clinical implications of various postoperative heart rhythm disturbances and their long-term effects on patients need to be further investigate through sufficiently powered randomized controlled studies.
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  • 文章类型: Journal Article
    在这一章中,我提供了一种使用低浓度的类固醇激素20-羟基蜕皮激素(20E)对果蝇视盘外植体进行离体培养和实时成像的方法。该方法已经过优化,用于分析翼盘生长过程中的细胞动力学,并利用了来自体内实验的最新见解,证明20E是假想组织的生长和图案化所必需的。使用这个协议,在实时成像过程中,我们直接观察翼盘的快速增殖至少13小时。组织生长的方向也与从间接体内技术推断的方向一致。因此,这种方法为研究视盘发育过程中的动态细胞过程和组织运动提供了一种改进的方法。我首先描述了生长培养基的制备和解剖,然后我包括一个安装和实时成像的外植体的协议。
    In this chapter, I present a method for the ex vivo cultivation and live imaging of Drosophila imaginal disc explants using low concentrations of the steroid hormone 20-hydroxyecdysone (20E). This method has been optimized for analyzing cellular dynamics during wing disc growth and leverages recent insights from in vivo experiments demonstrating that 20E is required for growth and patterning of the imaginal tissues. Using this protocol, we directly observe wing disc proliferation at a rapid rate for at least 13 h during live imaging. The orientation of tissue growth is also consistent with that inferred from indirect in vivo techniques. Thus, this method provides an improved way of studying dynamic cellular processes and tissue movements during imaginal disc development. I first describe the preparation of the growth medium and the dissection, and then I include a protocol for mounting and live imaging of the explants.
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  • 文章类型: Journal Article
    斑马鱼端脑通过两步过程获得外翻形态,该过程发生在受精后1至5天(dpf)。关于这个过程如何影响离散的端脑细胞群的定位知之甚少,阻碍了我们对外翻如何影响端脑结构组织的理解。在这项研究中,我们描述了神经化学,Et(gata2:EGFP)bi105转基因鱼的端脑中EGFP阳性()细胞群的周期状态和形态在外翻和高达20dpf期间。我们将转基因插入映射到早期生长反应基因3(egr3)基因座上,并显示EGFP表达在整个大部分苍白端脑中概括了内源性egr3表达。使用gata2:EGFPbi105转基因,结合其他特征明确的转基因和结构标记,我们跟踪斑马鱼端脑中各种细胞群的发育,因为它经历了外翻的形态变化。将这些数据集注册到参考大脑,以形成外翻过程关键阶段的端脑发育图谱(1dpf,2dpf,和5dpf)并与成年期的表达进行比较。最后,我们将gata2:EGFPbi105表达注册到斑马鱼大脑浏览器6dpf参考大脑(ZBB,参见Marquart等人。,2015年,2017年;Tabor等人。,2019),允许将这种表达模式与ZBB中已有的解剖数据进行比较。
    Zebrafish telencephalon acquires an everted morphology by a two-step process that occurs from 1 to 5 days post-fertilization (dpf). Little is known about how this process affects the positioning of discrete telencephalic cell populations, hindering our understanding of how eversion impacts telencephalic structural organization. In this study, we characterize the neurochemistry, cycle state and morphology of an EGFP positive (+) cell population in the telencephalon of Et(gata2:EGFP)bi105 transgenic fish during eversion and up to 20dpf. We map the transgene insertion to the early-growth-response-gene-3 (egr3) locus and show that EGFP expression recapitulates endogenous egr3 expression throughout much of the pallial telencephalon. Using the gata2:EGFP bi105 transgene, in combination with other well-characterized transgenes and structural markers, we track the development of various cell populations in the zebrafish telencephalon as it undergoes the morphological changes underlying eversion. These datasets were registered to reference brains to form an atlas of telencephalic development at key stages of the eversion process (1dpf, 2dpf, and 5dpf) and compared to expression in adulthood. Finally, we registered gata2:EGFPbi105 expression to the Zebrafish Brain Browser 6dpf reference brain (ZBB, see Marquart et al., 2015, 2017; Tabor et al., 2019), to allow comparison of this expression pattern with anatomical data already in ZBB.
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  • 文章类型: Journal Article
    虽然探索复杂的未映射空间对机器人来说是一个持续的挑战,工厂能够可靠地完成这项任务。在这项工作中,我们开发了分支机器人,这些机器人通过模仿植物生长的关键特征的外翻过程进行部署(即,顶端延伸,分支)。我们证明,通过优化这些机器人的设计,即使在看不见的环境中,我们也可以成功地穿越复杂的地形。通过一组已知的训练地图来模拟机器人的生长,并通过特定于预期应用的奖励启发式方法来评估性能(即,探索,锚定),我们用粒子群算法优化机器人设计。我们展示了这些优化努力从已知地图上的训练转移到相同类型环境中看不见的地图上的性能,并且最终的设计是专门针对培训中使用的环境的。此外,我们制造了几种优化的分支外翻机器人设计,并展示了其硬件性能的关键方面。我们的分支设计复制了自然界中发现的三个属性:锚定,覆盖范围,和可达性。分支设计能够比非分支机器人多25%的给定空间,锚固力提高12.55×,并且能够保持大于100×它们自己的质量(即,重量为5克的装置保持575克)。我们还演示了使用机器人的锚固,该机器人在50kPa的内部压力下承受了超过66.7N的载荷。这些结果表明,使用分支藤蔓机器人穿越复杂且未映射的地形是有希望的。
    While exploring complex unmapped spaces is a persistent challenge for robots, plants are able to reliably accomplish this task. In this work we develop branching robots that deploy through an eversion process that mimics key features of plant growth (i.e., apical extension, branching). We show that by optimizing the design of these robots, we can successfully traverse complex terrain even in unseen instances of an environment. By simulating robot growth through a set of known training maps and evaluating performance with a reward heuristic specific to the intended application (i.e., exploration, anchoring), we optimized robot designs with a particle swarm algorithm. We show these optimization efforts transfer from training on known maps to performance on unseen maps in the same type of environment, and that the resulting designs are specialized to the environment used in training. Furthermore, we fabricated several optimized branching everting robot designs and demonstrated key aspects of their performance in hardware. Our branching designs replicated three properties found in nature: anchoring, coverage, and reachability. The branching designs were able to reach 25% more of a given space than non-branching robots, improved anchoring forces by 12.55×, and were able to hold greater than 100× their own mass (i.e., a device weighing 5 g held 575 g). We also demonstrated anchoring with a robot that held a load of over 66.7 N at an internal pressure of 50 kPa. These results show the promise of using branching vine robots for traversing complex and unmapped terrain.
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  • 文章类型: Journal Article
    我们在波斯新生儿中提出了一种罕见的先天性疾病,其特征是单侧上眼睑外翻。本报告旨在提高新生儿科医生和眼科医生对这种情况的首次观众的认识,并引导他们选择适当的管理。
    We present a rare congenital condition in a Persian newborn characterized by the unilateral everted upper eyelid. This report aimed to create awareness among neonatologists and ophthalmologists who are first-time viewers of this condition and lead them to choose the appropriate management.
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  • 文章类型: Journal Article
    The socket reaction moment (SRM) has been reported to change because of alignment changes in transtibial prosthetic sockets. However, the influence of prosthetic foot alignment on SRM remains unclear.
    Are SRMs predictable from alignment changes of prosthetic feet?
    Ten users of transtibial prostheses participated in this study. Under five alignment conditions (3 ° plantarflexion and dorsiflexion, 6 ° inversion and eversion, and baseline alignment), temporal-spatial parameters and sagittal and coronal SRMs were measured during walking. Cadence, walking speed, step time, single support time, and step length were compared. The maximum/minimum SRM, % stance (timing) of the maximum/minimum SRM, Zero-cross, and SRMs at 5 %, 20 %, and 75 % stance were extracted and compared. Repeated measures analysis of variance or Friedman tests, and linear regression analyses were conducted for statistical analyses (i.e., alignment conditions as independent variables and SRM parameters as dependent variables).
    The SRMs at 5%, 20 %, and 75 % stance showed significant differences under coronal angular changes. The minimum SRM, % stance of the minimum/maximum SRM, and Zero-cross showed significant differences under sagittal alignment changes. In linear regression analysis, the minimum SRM, % stance of the minimum/maximum SRM, SRM at 20 % stance, and Zero-cross were significant dependent variables in the sagittal plane. The maximum/minimum SRM, SRM at 20 % and 75 % stance, and % stance of the minimum SRM were significant dependent variables in the coronal plane.
    The results indicated that the changes in prosthetic feet angles may predict the magnitude of SRM (maximum/minimum SRM, SRM at 20 % and 75 % stance) in the coronal plane, and the timing of SRM (Zero-cross, % stance of the maximum/minimum SRM) in the sagittal plane. These findings suggest that the SRM may be useful for evaluating foot alignment in transtibial prostheses.
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  • 文章类型: Journal Article
    本文是对几种处于不同系统发育位置的放线动物物种的星形胶质细胞的首次比较研究,硬骨鱼(16种),和非硬骨鱼(3种),基于GFAP(胶质纤维酸性蛋白)的免疫组织化学染色,特征性的细胞骨架中间丝蛋白,和星形胶质细胞的免疫组织化学标记。问题是,星形胶质细胞结构如何反映这个最大的脊椎动物群体的高度多样性。与在sarcopterygii(包括四足动物)中发现的“逃避”相反,该活动的端脑具有所谓的“常变性”发育。在四足脊椎动物中,几个大脑部分要么没有等价物(例如,环面纵向,lobus下体,lobusnervivagi),或具有相当不同的形状(例如,小脑)。应用DAKO多克隆抗GFAP血清可视化GFAP。这项研究主要集中在端脑(外翻),顶盖(视觉方向),和小脑(运动协调),进化变化最值得期待,但其他地区也进行了调查。主要的星形胶质细胞元素是tanycytes(长,薄,纤维样细胞)。在硬骨鱼端脑中,放射状胶质的“扇形”重排反映了外翻。在比希尔,明星,还有gar,其中外翻不太明显,没有形成“扇形”重新排列。在顶盖中,放射状神经胶质突被免疫染色,但是在Ostariophisi和Euteleostei中,它没有延伸到它们的深处。在每组小脑中都发现了类似Bergmann的神经胶质,包括非硬骨鱼,除了鲤科.Cyprininae的迷走神经叶独特地扩大和分层,并有相应的层状星形胶质系统,感觉和运动神经元区几乎没有GFAP。总之,尽管Actinopterygii大脑的多样性和进化变化,星形胶质结构的多样性是中等的。与软骨和羊膜相反;在Actinopterygii中,真正的星形胶质细胞(星状室管膜外细胞)在进化过程中没有出现,无GFAP地区的扩展受到限制。
    The present paper is the first comparative study on the astroglia of several actinopterygian species at different phylogenetical positions, teleosts (16 species), and non-teleosts (3 species), based on the immunohistochemical staining of GFAP (glial fibrillary acidic protein), the characteristic cytoskeletal intermediary filament protein, and immunohistochemical marker of astroglia. The question was, how the astroglial architecture reflexes the high diversity of this largest vertebrate group. The actinopterygian telencephalon has a so-called \'eversive\' development in contrast to the \'evagination\' found in sarcopterygii (including tetrapods). Several brain parts either have no equivalents in tetrapod vertebrates (e.g., torus longitudinalis, lobus inferior, lobus nervi vagi), or have rather different shapes (e.g., the cerebellum). GFAP was visualized applying DAKO polyclonal anti-GFAP serum. The study was focused mainly on the telencephalon (eversion), tectum (visual orientation), and cerebellum (motor coordination) where the evolutionary changes were most expected, but the other areas were also investigated. The predominant astroglial elements were tanycytes (long, thin, fiber-like cells). In the teleost telencephala a \'fan-shape\' re-arrangement of radial glia reflects the eversion. In bichir, starlet, and gar, in which the eversion is less pronounced, the \'fan-shape\' re-arrangement did not form. In the tectum the radial glial processes were immunostained, but in Ostariophysi and Euteleostei it did not extend into their deep segments. In the cerebellum Bergmann-like glia was found in each group, including non-teleosts, except for Cyprinidae. The vagal lobe was uniquely enlarged and layered in Cyprininae, and had a corresponding layered astroglial system, which left almost free of GFAP the zones of sensory and motor neurons. In conclusion, despite the diversity and evolutionary alterations of Actinopterygii brains, the diversity of the astroglial architecture is moderate. In contrast to Chondrichthyes and Amniotes; in Actinopterygii true astrocytes (stellate-shaped extraependymal cells) did not appear during evolution, and the expansion of GFAP-free areas was limited.
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  • 文章类型: Case Reports
    跟腱病(AT)和胫骨内侧应力综合征(MTSS)是两种最常见的跑步相关损伤。在先前的一项研究中,研究了在向最大跑鞋过渡六周之前和之后的跑步生物力学,由于跟腱疼痛和胫骨疼痛,两名跑步者退出了这项研究,分别。这个案例系列的目的是研究这两名跑步者的跑步生物力学,确定与最大限度使用鞋子相关的潜在伤害原因。在六周过渡之前,使用8摄像头运动捕获系统和两个嵌入式力板,在实验室环境中收集了这两名穿着最大跑鞋和传统跑鞋的跑步者的跑步生物力学。两名跑步者在最大鞋中都表现出长时间的外翻,先前已被认为是发生跟腱病和胫骨内侧应力综合征的潜在危险因素。在跑步者中也观察到相对较高的负载率和冲击力,最大鞋有胫骨疼痛,这可能导致了他们的痛苦。需要对穿着最大鞋子跑步的个体的伤害率进行更多的前瞻性研究。
    Achilles tendinopathy (AT) and medial tibial stress syndrome (MTSS) are two of the most common running-related injuries. In a previous study investigating running biomechanics before and after a six-week transition to maximal running shoes, two runners dropped out of this study due to Achilles pain and shin pain, respectively. The purpose of this case series was to investigate running biomechanics in those two runners, identifying potential causes for injury in relation to maximal shoe use. Running biomechanics were collected in a laboratory setting for these two runners wearing both a maximal running shoe and traditional running shoe before the six-week transition using an 8-camera motion capture system and two embedded force plates. Both runners displayed prolonged eversion in the maximal shoe, which has been previously cited as a potential risk factor for developing Achilles tendinopathy and medial tibial stress syndrome. Relatively high loading rates and impact forces were also observed in the runner with shin pain in the maximal shoe, which may have contributed to their pain. More prospective research on injury rates in individuals running in maximal shoes is needed.
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  • 文章类型: Case Reports
    Accessory fibularis muscle is prevalent in 2.9-21.8% of the world population. Incidentally during routine dissection of a 75-year-old male cadaver, bilaterally accessory fibularis muscle was observed. On both the sides, proximal site of attachment was same but muscle displayed different distal sites of insertion in the foot. Appearance of accessory muscle in the leg is indicative towards the ongoing phylogenetic evolution operating at the molecular level. Bio-mechanical advantage of this variant muscle is the additional support provided to the subtalar joint. Also it acts as synergist to fibularis longus and brevis during eversion of the foot. Clinically this muscle may predispose to chronic ankle pain, dislocation of peroneal tendons from retromalleolar groove and post fracture dislocation in foot. Wide range of accessory fibularis muscle has been previously reported with different nomenclature, however, existence of two different variants in same cadaver has been rarely reported. The current observation is significant for clinicians to acknowledge when evaluating and operating patients with foot disorders.
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  • 文章类型: Journal Article
    During MitraClip implantation sub-valvular correction of trajectory and/or alignment may increase adverse clip or leaflet events. With systematic adjunctive use of fluoroscopy (\"Parallax technique\"), we aimed to assess parameters that minimize the need for corrective measures and help increase procedural efficiency.
    We retrospectively analyzed 30 patients without (Fl-) and 39 patients utilizing adjunctive fluoroscopy (Fl+) during MitraClip implantation. After establishing trajectory and supra-valvular alignment, the Parallax technique was utilized. Trajectory and alignment are maintained during advancement.
    All patients had 3 or 4+ MR. There were no differences in baseline demographics. The average number of clips (Fl- vs Fl+) was 1.72 ± 0.8 vs 1.59 ± 0.5, p = .57. For the first clip, the need for sub-valvular alignment (80% vs. 36%, p = .0001), eversion with retraction back to left atrium (23% vs. 10%, p = .001) and the number of grasps (2.3 ± 1.2 vs 1.4 ± 0.9) was reduced. The time from transseptal puncture to first clip deployment (71 ± 21 vs 44 ± 16 min, p = .01) was reduced. Procedural success was achieved in all but one patient in the Fl- group (p = ns). There were no differences noted for in-hospital or 30-day outcomes.
    Systematic use of a simple and easy to implement \"Parallax technique\" was associated with reduced need for sub-valvular manipulation and was associated with improved procedural times. Further larger scale studies are needed to assess the applicability of the technique.
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