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Hemodynamics of the VenusP Valve System™—an in vitro study VenusP Valve System™ 的血液动力学--体外研究
Pub Date : 2024-05-02 DOI: 10.3389/fmedt.2024.1376649
Huang Chen, Milad Samaee, Michael Tree, L. Dasi, Ajit Yoganathan
This study aims to evaluate the fluid dynamic characteristics of the VenusP Valve System™ under varying cardiac outputs in vitro. A thorough hemodynamic study of the valve under physiological cardiac conditions was conducted and served as an independent assessment of the performance of the valve. Flow fields downstream of the valve near the pulmonary bifurcation were quantitatively studied by two-dimensional Particle Image Velocimetry (PIV). The obtained flow field was analyzed for potential regions of flow stasis and recirculation, and elevated shear stress and turbulence. High-speed en face imaging capturing the leaflet motion provided data for leaflet kinematic modeling. The experimental conditions for PIV studies were in accordance with ISO 5840-1:2021 standard, and two valves with different lengths and different orientations were studied. Results show good hemodynamics performance for the tested valves according to ISO 5840 standard without significant regions of flow stasis. Observed shear stress values are all well below established hemolysis limits.
本研究旨在评估 VenusP Valve System™ 在体外不同心脏输出量下的流体动力学特性。在生理心脏条件下对瓣膜进行了全面的血液动力学研究,作为对瓣膜性能的独立评估。通过二维粒子图像测速仪(PIV)对瓣膜下游靠近肺动脉分叉处的流场进行了定量研究。对所获得的流场进行了分析,以确定是否存在潜在的流动停滞和再循环区域,以及剪应力和湍流升高的情况。捕捉小叶运动的高速面成像为小叶运动学建模提供了数据。PIV 研究的实验条件符合 ISO 5840-1:2021 标准,研究了两个不同长度和不同方向的瓣膜。结果表明,根据 ISO 5840 标准测试的瓣膜具有良好的血液动力学性能,没有明显的血流停滞区域。观察到的剪切应力值均远低于既定的溶血极限。
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引用次数: 0
Evolutionary trends and innovations in cardiovascular intervention. 心血管干预的演变趋势和创新。
Pub Date : 2024-05-02 eCollection Date: 2024-01-01 DOI: 10.3389/fmedt.2024.1384008
Vincenzo Vento, Salomé Kuntz, Anne Lejay, Nabil Chakfe

Cardiovascular diseases remain a global health challenge, prompting continuous innovation in medical technology, particularly in Cardiovascular MedTech. This article provides a comprehensive exploration of the transformative landscape of Cardiovascular MedTech in the 21st century, focusing on interventions. The escalating prevalence of cardiovascular diseases and the demand for personalized care drive the evolving landscape, with technologies like wearables and AI reshaping patient-centric healthcare. Wearable devices offer real-time monitoring, enhancing procedural precision and patient outcomes. AI facilitates risk assessment and personalized treatment strategies, revolutionizing intervention precision. Minimally invasive procedures, aided by robotics and novel materials, minimize patient impact and improve outcomes. 3D printing enables patient-specific implants, while regenerative medicine promises cardiac regeneration. Augmented reality headsets empower surgeons during procedures, enhancing precision and awareness. Novel materials and radiation reduction techniques further optimize interventions, prioritizing patient safety. Data security measures ensure patient privacy in the era of connected healthcare. Modern technologies enhance traditional surgeries, refining outcomes. The integration of these innovations promises to shape a healthier future for cardiovascular procedures, emphasizing collaboration and research to maximize their transformative potential.

心血管疾病仍然是一项全球性的健康挑战,促使医疗技术不断创新,尤其是心血管医疗技术。本文全面探讨了 21 世纪心血管医疗技术的变革格局,重点关注干预措施。心血管疾病发病率的不断攀升和对个性化医疗服务的需求推动了医疗技术的不断发展,可穿戴设备和人工智能等技术重塑了以患者为中心的医疗服务。可穿戴设备提供实时监测,提高了程序的精确性和患者的治疗效果。人工智能促进了风险评估和个性化治疗策略,彻底改变了干预的精确性。在机器人技术和新型材料的辅助下,微创手术最大程度地减少了对患者的影响,提高了治疗效果。三维打印技术实现了针对患者的植入物,而再生医学则有望实现心脏再生。增强现实耳机使外科医生能够在手术过程中提高精准度和认知度。新型材料和减少辐射技术进一步优化了干预措施,并将患者安全放在首位。数据安全措施确保了互联医疗时代的患者隐私。现代技术强化了传统手术,改善了手术效果。这些创新技术的融合有望为心血管手术塑造一个更健康的未来,同时强调合作与研究,以最大限度地发挥其变革潜力。
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引用次数: 0
Hemodynamics of the VenusP Valve System™-an in vitro study. VenusP Valve System™ 的血液动力学--体外研究。
Pub Date : 2024-05-02 eCollection Date: 2024-01-01 DOI: 10.3389/fmedt.2024.1376649
Huang Chen, Milad Samaee, Michael Tree, Lakshmi Dasi, Ajit Yoganathan

This study aims to evaluate the fluid dynamic characteristics of the VenusP Valve System™ under varying cardiac outputs in vitro. A thorough hemodynamic study of the valve under physiological cardiac conditions was conducted and served as an independent assessment of the performance of the valve. Flow fields downstream of the valve near the pulmonary bifurcation were quantitatively studied by two-dimensional Particle Image Velocimetry (PIV). The obtained flow field was analyzed for potential regions of flow stasis and recirculation, and elevated shear stress and turbulence. High-speed en face imaging capturing the leaflet motion provided data for leaflet kinematic modeling. The experimental conditions for PIV studies were in accordance with ISO 5840-1:2021 standard, and two valves with different lengths and different orientations were studied. Results show good hemodynamics performance for the tested valves according to ISO 5840 standard without significant regions of flow stasis. Observed shear stress values are all well below established hemolysis limits.

本研究旨在评估 VenusP Valve System™ 在体外不同心输出量下的流体动力学特性。在生理心脏条件下对瓣膜进行了全面的血液动力学研究,作为对瓣膜性能的独立评估。通过二维粒子图像测速仪(PIV)对瓣膜下游靠近肺动脉分叉处的流场进行了定量研究。对所获得的流场进行了分析,以确定是否存在潜在的流动停滞和再循环区域,以及剪应力和湍流的升高。捕捉小叶运动的高速面成像为小叶运动学建模提供了数据。PIV 研究的实验条件符合 ISO 5840-1:2021 标准,研究了两个不同长度和不同方向的瓣膜。结果表明,根据 ISO 5840 标准测试的瓣膜具有良好的血液动力学性能,没有明显的血流停滞区域。观察到的剪切应力值均远低于既定的溶血极限。
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引用次数: 0
Evolutionary trends and innovations in cardiovascular intervention 心血管干预的演变趋势与创新
Pub Date : 2024-05-02 DOI: 10.3389/fmedt.2024.1384008
Vincenzo Vento, Salome H Kuntz, A. Lejay, N. Chakfé
Cardiovascular diseases remain a global health challenge, prompting continuous innovation in medical technology, particularly in Cardiovascular MedTech. This article provides a comprehensive exploration of the transformative landscape of Cardiovascular MedTech in the 21st century, focusing on interventions. The escalating prevalence of cardiovascular diseases and the demand for personalized care drive the evolving landscape, with technologies like wearables and AI reshaping patient-centric healthcare. Wearable devices offer real-time monitoring, enhancing procedural precision and patient outcomes. AI facilitates risk assessment and personalized treatment strategies, revolutionizing intervention precision. Minimally invasive procedures, aided by robotics and novel materials, minimize patient impact and improve outcomes. 3D printing enables patient-specific implants, while regenerative medicine promises cardiac regeneration. Augmented reality headsets empower surgeons during procedures, enhancing precision and awareness. Novel materials and radiation reduction techniques further optimize interventions, prioritizing patient safety. Data security measures ensure patient privacy in the era of connected healthcare. Modern technologies enhance traditional surgeries, refining outcomes. The integration of these innovations promises to shape a healthier future for cardiovascular procedures, emphasizing collaboration and research to maximize their transformative potential.
心血管疾病仍然是一项全球性的健康挑战,促使医疗技术不断创新,尤其是心血管医疗技术。本文全面探讨了 21 世纪心血管医疗技术的变革格局,重点关注干预措施。心血管疾病发病率的不断攀升和对个性化医疗服务的需求推动了医疗技术的不断发展,可穿戴设备和人工智能等技术重塑了以患者为中心的医疗服务。可穿戴设备提供实时监测,提高了程序的精确性和患者的治疗效果。人工智能促进了风险评估和个性化治疗策略,彻底改变了干预的精确性。在机器人技术和新型材料的辅助下,微创手术最大程度地减少了对患者的影响,提高了治疗效果。三维打印技术实现了针对患者的植入物,而再生医学则有望实现心脏再生。增强现实耳机使外科医生能够在手术过程中提高精准度和认知度。新型材料和减少辐射技术进一步优化了干预措施,并将患者安全放在首位。数据安全措施确保了互联医疗时代的患者隐私。现代技术强化了传统手术,改善了手术效果。这些创新技术的融合有望为心血管手术塑造一个更健康的未来,同时强调合作与研究,以最大限度地发挥其变革潜力。
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引用次数: 0
SQUID magnetoneurography: an old-fashioned yet new tool for noninvasive functional imaging of spinal cords and peripheral nerves SQUID 磁神经成像:脊髓和周围神经无创功能成像的老式新工具
Pub Date : 2024-04-16 DOI: 10.3389/fmedt.2024.1351905
Yoshiaki Adachi, S. Kawabata
We are engaged in the development and clinical application of a neural magnetic field measurement system that utilizes biomagnetic measurements to observe the activity of the spinal cord and peripheral nerves. Unlike conventional surface potential measurements, biomagnetic measurements are not affected by the conductivity distribution within the body, making them less influenced by the anatomical structure of body tissues. Consequently, functional testing using biomagnetic measurements can achieve higher spatial resolution compared to surface potential measurements. The neural magnetic field measurement, referred to as magnetoneurography, takes advantage of these benefits to enable functional testing of the spinal cord and peripheral nerves, while maintaining high spatial resolution and noninvasiveness. Our magnetoneurograph system is based on superconducting quantum interference devices (SQUIDs) similar to the conventional biomagnetic measurement systems. Various design considerations have been incorporated into the SQUID sensor array structure and signal processing software to make it suitable for detecting neural signal propagation along spinal cord and peripheral nerve. The technical validation of this system began in 1999 with a 3-channel SQUID system. Over the course of more than 20 years, we have continued technological development through medical-engineering collaboration, and in the latest prototype released in 2020, neural function imaging of the spinal cord and peripheral nerves, which could also be applied for the diagnosis of neurological disorders, has become possible. This paper provides an overview of the technical aspects of the magnetoneurograph system, covering the measurement hardware and software perspectives for providing diagnostic information, and its applications. Additionally, we discuss the integration with a helium recondensing system, which is a key factor in reducing running costs and achieving practicality in hospitals.
我们致力于神经磁场测量系统的开发和临床应用,该系统利用生物磁测量来观察脊髓和周围神经的活动。与传统的表面电位测量不同,生物磁测量不受体内电导率分布的影响,因此受人体组织解剖结构的影响较小。因此,与表面电位测量法相比,使用生物磁测量法进行功能测试可以获得更高的空间分辨率。神经磁场测量被称为磁神经图,它利用了这些优势,实现了脊髓和周围神经的功能测试,同时保持了高空间分辨率和非侵入性。我们的磁神经图系统基于超导量子干涉装置(SQUID),与传统的生物磁测量系统类似。我们在 SQUID 传感器阵列结构和信号处理软件中加入了各种设计考虑因素,使其适用于检测神经信号沿脊髓和周围神经的传播。该系统的技术验证始于 1999 年的 3 通道 SQUID 系统。在 20 多年的时间里,我们通过医学工程合作不断进行技术开发,在 2020 年发布的最新原型中,脊髓和周围神经的神经功能成像已成为可能,也可用于神经系统疾病的诊断。本文概述了磁神经图系统的技术方面,包括提供诊断信息的测量硬件和软件及其应用。此外,我们还讨论了与氦气再冷凝系统的集成,这是降低运行成本和实现医院实用性的关键因素。
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引用次数: 0
OxyHbMeter—a novel bedside medical device for monitoring cell-free hemoglobin in the cerebrospinal fluid—proof of principle OxyHbMeter--用于监测脑脊液中无细胞血红蛋白的新型床旁医疗设备--原理验证
Pub Date : 2024-04-11 DOI: 10.3389/fmedt.2024.1274058
Nikolaos Tachatos, J. Willms, Michael Sebastian Gerlt, Kiran Kuruvithadam, Michael Hugelshofer, Kevin Akeret, Jeremy Deuel, Emanuela Keller, Marianne Schmid Daners
Delayed cerebral ischemia (DCI) occurs in up to one third of patients suffering from aneurysmal subarachnoid hemorrhage (aSAH). Untreated, it leads to secondary cerebral infarctions and is frequently associated with death or severe disability. After aneurysm rupture, erythrocytes in the subarachnoid space lyse and liberate free hemoglobin (Hb), a key driver for the development of DCI. Hemoglobin in the cerebrospinal fluid (CSF-Hb) can be analyzed through a two-step procedure of centrifugation to exclude intact erythrocytes and subsequent spectrophotometric quantification. This analysis can only be done in specialized laboratories but not at the bedside in the intensive care unit. This limits the number of tests done, increases the variability of the results and restricts accuracy. Bedside measurements of CSF-Hb as a biomarker with a point of care diagnostic test system would allow for a continuous monitoring for the risk of DCI in the individual patient. In this study, a microfluidic chip was explored that allows to continuously separate blood particles from CSF or plasma based on acoustophoresis. An in vitro test bench was developed to test in-line measurements with the developed microfluidic chip and a spectrometer. The proof of principle for a continuous particle separation device has been established with diluted blood and CSF samples from animals and aSAH patients, respectively. Processing 1 mL of blood in our microfluidic device was achieved within around 70 min demonstrating only minor deviations from the gold standard centrifugation (7% average error of patient samples), while saving several hours of processing time and additionally the reduction of deviations in the results due to manual labor.
多达三分之一的动脉瘤性蛛网膜下腔出血(aSAH)患者会出现延迟性脑缺血(DCI)。如不及时治疗,会导致继发性脑梗塞,并经常导致死亡或严重残疾。动脉瘤破裂后,蛛网膜下腔的红细胞裂解并释放出游离血红蛋白(Hb),这是导致 DCI 发生的关键因素。脑脊液中的血红蛋白(CSF-Hb)可通过离心排除完整红细胞和随后的分光光度定量这两个步骤进行分析。这种分析只能在专业实验室进行,而不能在重症监护室的床边进行。这就限制了检测的次数,增加了结果的可变性并限制了准确性。通过床旁测量 CSF-Hb 作为生物标记物,并使用护理点诊断测试系统,可以持续监测个体患者的 DCI 风险。本研究探索了一种微流控芯片,它能通过声波电泳技术从 CSF 或血浆中连续分离血液颗粒。研究人员开发了一个体外测试台,用于测试使用所开发的微流控芯片和光谱仪进行的在线测量。利用稀释的动物血液和脑脊液样本以及脑梗塞患者的血液和脑脊液样本,对连续颗粒分离装置进行了原理验证。用我们的微流体设备处理 1 毫升血液仅需约 70 分钟,与金标准离心法相比仅有微小偏差(患者样本平均误差为 7%),同时节省了数小时的处理时间,并减少了人工操作导致的结果偏差。
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引用次数: 0
Reprogramming T cells as an emerging treatment to slow human age-related decline in health 重编程 T 细胞是减缓人类与年龄相关的健康衰退的新兴疗法
Pub Date : 2024-04-11 DOI: 10.3389/fmedt.2024.1384648
P. Peplow
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引用次数: 0
Gaming motivation and well-being among Norwegian adult gamers: the role of gender and disability 挪威成年游戏玩家的游戏动机和幸福感:性别和残疾的作用
Pub Date : 2024-04-11 DOI: 10.3389/fmedt.2024.1330926
B. Hygen, Christian Wendelborg, B. Solstad, Frode Stenseng, Mari Bore Øverland, V. Skalická
Introduction Digital gaming is a popular and often social activity, also among adults. However, we need more knowledge of the social dynamics of gaming and its potential benefits for one's well-being. The current study aimed to examine gaming motivation, time spent gaming, and gaming performed together with friends, family, or romantic partner and how these aspects relate to expanded social network and well-being among men and women with and without disability. Methods Regular players of the popular game Fortnite Battle Royale (FBR; N = 278, 48.5% women, Mage = 32.38) completed an online questionnaire assessing their motivations for playing FBR (social motivation, achievement motivation, novelty motivation), time spent gaming, whom they usually play with, their psychological well-being, and FBR's impact on their life and social network. Differentiated statistical analyses on gender and disability were performed. Results and discussion The results showed that time spent gaming and social motivation to play were associated with larger social networks for all participants (strongest for women). More time spent gaming FBR was also associated with a positive impact on life for those with a disability. Social motivation to play was positively associated with a positive impact on life for men and those without a disability and increased well-being for women. Novelty motivation, which concerns experiencing new features in the game, was associated with a positive impact on life for women and with a decrease in well-being for those with a disability. This study demonstrated that gaming can be an essential social arena associated with positive outcomes for men, women and disabled people, who—when socially motivated—may expand their social networks through gaming.
引言 数字游戏是一种流行的社交活动,在成年人中也是如此。然而,我们需要更多地了解游戏的社会动态及其对个人福祉的潜在益处。本研究旨在探讨游戏动机、游戏时间、与朋友、家人或恋人一起玩游戏的情况,以及这些方面与残疾和非残疾男性和女性扩大社交网络和幸福感之间的关系。方法 流行游戏《堡垒之夜大逃杀》(Fortnite Battle Royale,FBR;N = 278,48.5% 为女性,Mage = 32.38)的常玩者填写一份在线问卷,评估他们玩《堡垒之夜大逃杀》的动机(社交动机、成就动机、新奇动机)、花费在游戏上的时间、通常与谁一起玩、他们的心理健康以及《堡垒之夜大逃杀》对他们的生活和社交网络的影响。对性别和残疾情况进行了不同的统计分析。结果与讨论 结果显示,对于所有参与者来说,游戏时间和游戏的社交动机与更大的社交网络有关(女性的社交网络最大)。花更多时间玩《FBR》游戏也与残疾人士的生活产生积极影响有关。对于男性和非残疾人士来说,游戏的社交动机与对生活的积极影响呈正相关,而对于女性来说,则与幸福感的增加呈正相关。新奇动机涉及体验游戏中的新功能,对女性来说与对生活的积极影响相关,而对残疾人士来说则与幸福感下降相关。这项研究表明,游戏可以成为一个重要的社交场所,对男性、女性和残疾人都有积极的影响。
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引用次数: 0
Risks and benefits associated with the primary functions of artificial intelligence powered autoinjectors 与人工智能驱动的自动注射器主要功能相关的风险和益处
Pub Date : 2024-04-05 DOI: 10.3389/fmedt.2024.1331058
M. Machal
Objectives This research aims to present and assess the Primary Functions of autoinjectors introduced in ISO 11608-1:2022. Investigate the risks in current autoinjector technology, identify and assess risks and benefits associated with Artificial Intelligence (AI) powered autoinjectors, and propose a framework for mitigating these risks. ISO 11608-1:2022 is a standard that specifies requirements and test methods for needle-based injection systems intended to deliver drugs, focusing on design and function to ensure patient safety and product effectiveness. ‘KZH’ is an FDA product code used to classify autoinjectors, for regulatory purposes, ensuring they meet defined safety and efficacy standards before being marketed. Method A comprehensive analysis of autoinjectors problems is conducted using data from the United States Food and Drug Administration (FDA) database. This database records medical device reporting events, including those related to autoinjectors, reported by various sources. The analysis focuses on events associated with the product code KZH, covering data from January 1, 2008, to September 30, 2023. This research employs statistical frequency analysis and incorporates pertinent the FDA, United Kingdom, European Commission regulations, and ISO standards. Results 500 medical device reporting events are assessed for autoinjectors under the KZH code. Ultimately, 188 of these events are confirmed to be associated with autoinjectors, all 500 medical devices were seen to lack AI capabilities. An analysis of these events for traditional mechanical autoinjectors revealed a predominant occurrence of malfunctions (72%) and injuries (26%) among event types. Device problems, such as breakage, defects, jams, and others, accounted for 45% of incidents, while 10% are attributed to patient problems, particularly missed and underdoses. Conclusion Traditional autoinjectors are designed to assist patients in medication administration, underscoring the need for quality control, reliability, and design enhancements. AI autoinjectors, sharing this goal, bring additional cybersecurity and software risks, requiring a comprehensive risk management framework that includes standards, tools, training, and ongoing monitoring. The integration of AI promises to improve functionality, enable real-time monitoring, and facilitate remote clinical trials, timely interventions, and tailored medical treatments.
目标 本研究旨在介绍和评估 ISO 11608-1:2022 中引入的自动注射器的主要功能。调查当前自动注射器技术的风险,识别和评估与人工智能(AI)驱动的自动注射器相关的风险和益处,并提出降低这些风险的框架。ISO 11608-1:2022 是一项标准,规定了用于给药的针式注射系统的要求和测试方法,重点关注设计和功能,以确保患者安全和产品有效性。KZH "是美国食品和药物管理局用于对自动注射器进行分类的产品代码,用于监管目的,确保自动注射器在上市前符合规定的安全性和有效性标准。方法 利用美国食品和药物管理局(FDA)数据库中的数据,对自动注射器问题进行全面分析。该数据库记录了各种来源报告的医疗器械报告事件,包括与自动注射器有关的事件。分析的重点是与产品代码 KZH 相关的事件,涵盖 2008 年 1 月 1 日至 2023 年 9 月 30 日的数据。这项研究采用了统计频率分析法,并结合了相关的 FDA、英国、欧盟委员会法规和 ISO 标准。结果 评估了 500 起 KZH 代码下的自动注射器医疗器械报告事件。最终,188 起事件被证实与自动注射器有关,所有 500 起医疗器械事件都被认为缺乏人工智能功能。对这些传统机械式自动注射器事件的分析表明,在事件类型中,故障(72%)和伤害(26%)占主导地位。设备问题(如破损、缺陷、卡住等)占事件的 45%,而 10%则归因于患者问题,尤其是漏服和少服。结论 传统自动注射器旨在协助患者用药,因此需要加强质量控制、可靠性和设计。人工智能自动注射器在实现这一目标的同时,也带来了额外的网络安全和软件风险,需要一个包括标准、工具、培训和持续监控在内的全面风险管理框架。人工智能的集成有望提高功能性,实现实时监控,促进远程临床试验、及时干预和定制医疗。
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引用次数: 0
Designing Chinese hospital emergency departments to leverage artificial intelligence—a systematic literature review on the challenges and opportunities 利用人工智能设计中国医院急诊科--关于挑战与机遇的系统性文献综述
Pub Date : 2024-03-21 DOI: 10.3389/fmedt.2024.1307625
Sijie Tan, Grant Mills
Artificial intelligence (AI) has witnessed rapid advances in the healthcare domain in recent years, especially in the emergency field, where AI is likely to radically reshape medical service delivery. Although AI has substantial potential to enhance diagnostic accuracy and operational efficiency in hospitals, research on its applications in Emergency Department building design remains relatively scarce. Therefore, this study aims to investigate Emergency Department facility design by identifying the challenges and opportunities of using AI. Two systematic literature reviews are combined, one in AI and the other in sensors, to explore their potential application to support decision-making, resource optimisation and patient monitoring. These reviews have then informed a discussion on integrating AI sensors in contemporary Emergency Department designs for use in China to support the evidence base on resuscitation units, emergency operating rooms and Emergency Department Intensive Care Unit (ED-ICU) design. We hope to inform the strategic implementation of AI sensors and how they might transform Emergency Department design to support medical staff and enhance the patient experience.
近年来,人工智能(AI)在医疗保健领域取得了突飞猛进的发展,尤其是在急诊领域,人工智能很可能从根本上重塑医疗服务的提供。虽然人工智能在提高医院诊断准确性和运营效率方面具有巨大潜力,但有关其在急诊科建筑设计中应用的研究仍然相对较少。因此,本研究旨在通过确定使用人工智能所面临的挑战和机遇来研究急诊科设施设计。本研究结合了两篇系统性文献综述,一篇是人工智能方面的,另一篇是传感器方面的,以探索它们在支持决策、资源优化和患者监控方面的潜在应用。这些综述为将人工智能传感器整合到中国当代急诊科设计中的讨论提供了信息,以支持复苏单元、急诊手术室和急诊科重症监护室(ED-ICU)设计的证据基础。我们希望为人工智能传感器的战略实施以及如何改变急诊科的设计提供信息,从而为医务人员提供支持并改善患者的就医体验。
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引用次数: 0
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Frontiers in medical technology
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