keyword
https://read.qxmd.com/read/38537063/impella-as-bridge-to-durable-left-ventricular-assist-device-in-acute-myocardial-infarction-cardiogenic-shock-patients
#1
JOURNAL ARTICLE
Silvia Ajello, Marina Pieri, Sara Dormio, Luca Baldetti, Savino Altizio, Filippo Consolo, Pasquale Nardelli, Alessandro Ortalda, Anna Mara Scandroglio
Implantation of durable left ventricular assist device (LVAD) in cardiogenic shock (CS) patients after acute myocardial infarction (AMI) poses specific challenges (small left ventricular size, acute infarct area, need for antithrombotic therapy, status Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) 1 with impaired organ function and derangements in coagulation and inflammatory parameters) which may affect outcomes. We reviewed data of all AMI-CS patients who were implanted LVAD after Impella support at a referral center with the aim to analyze feasibility, timing, and outcomes of durable LVAD implantation after tMCS with Impella due to AMI-CS...
March 28, 2024: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://read.qxmd.com/read/38535677/enhancing-the-thermal-conductivity-of-cnt-aln-silicone-rubber-composites-by-using-cnts-directly-grown-on-aln-to-achieve-a-reduced-filler-filling-ratio
#2
JOURNAL ARTICLE
Naoyuki Matsumoto, Don N Futaba, Takeo Yamada, Ken Kokubo
Achieving the thermal conductivity required for efficient heat management in semiconductors and other devices requires the integration of thermally conductive ceramic fillers at concentrations of 60 vol% or higher. However, an increased filler content often negatively affects the mechanical properties of the composite matrix, limiting its practical applicability. To address this issue, in this paper, we present a new strategy to reduce the required ceramic filler content: the use of a thermally conductive ceramic composite filler with carbon nanotubes (CNTs) grown on aluminum nitride (AlN)...
March 15, 2024: Nanomaterials
https://read.qxmd.com/read/38531061/multi-functional-actuators-made-with-biomass-based-graphene-polymer-films-for-intelligent-gesture-recognition-and-multi-mode-self-powered-sensing
#3
JOURNAL ARTICLE
Mingcen Weng, Jiahao Zhou, Peidi Zhou, Ruzhi Shang, Minghua You, Guozhen Shen, Huamin Chen
Multi-functional actuation systems involve the mechanical integration of multiple actuation and sensor devices with external energy sources. The intricate combination makes it difficult to meet the requirements of lightweight. Hence, polypyrrole@graphene-bacterial cellulose (PPy@G-BC) films are proposed to construct multi-responsive and bilayer actuators integrated with multi-mode self-powered sensing function. The PPy@G-BC film not only exhibits good photo-thermoelectric (PTE) properties but also possesses good hydrophilicity and high Young's modulus...
March 26, 2024: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://read.qxmd.com/read/38530587/current-status-and-future-directions-in-pediatric-ventricular-assist-device
#4
REVIEW
Xu Huang, Yi Shen, Yiwei Liu, Hao Zhang
A ventricular assist device (VAD) is a form of mechanical circulatory support that uses a mechanical pump to partially or fully take over the function of a failed heart. In recent decades, the VAD has become a crucial option in the treatment of end-stage heart failure in adult patients. However, due to the lack of suitable devices and more complicated patient profiles, this therapeutic approach is still not widely used for pediatric populations. This article reviews the clinically available devices, adverse events, and future directions of design and implementation in pediatric VADs...
March 26, 2024: Heart Failure Reviews
https://read.qxmd.com/read/38526578/british-societies-guideline-on-the-management-of-emergencies-in-implantable-left-ventricular-assist-device-recipients-in-transplant-centres
#5
JOURNAL ARTICLE
Waqas Akhtar, Veronica Rial Baston, Marius Berman, Sai Bhagra, Colin Chue, Charles D Deakin, Jonathan R Dalzell, Joel Dunning, John Dunning, Roy S Gardner, Kristine Kiff, Shishir Kore, Sern Lim, Guy MacGowan, Ian Naldrett, Marlies Ostermann, Sofia Pinto, Stephen Pettit, Fernando Riesgo Gil, Alex Rosenberg, Antonio Rubino, Rana Sayeed, Joao Sequeira, Neil Swanson, Steven Tsui, Christopher Walker, Stephen Webb, Andrew Woods, Rajamiyer Ventkateswaran, Christopher T Bowles
An implantable left ventricular assist device (LVAD) is indicated as a bridge to transplantation or recovery in the United Kingdom (UK). The mechanism of action of the LVAD results in a unique state of haemodynamic stability with diminished arterial pulsatility. The clinical assessment of an LVAD recipient can be challenging because non-invasive blood pressure, pulse and oxygen saturation measurements may be hard to obtain. As a result of this unusual situation and complex interplay between the device and the native circulation, resuscitation of LVAD recipients requires bespoke guidelines...
March 25, 2024: Intensive Care Medicine
https://read.qxmd.com/read/38524063/fulminant-myocarditis-and-venoarterial-extracorporeal-membrane-oxygenation-a-systematic-review
#6
REVIEW
Spencer E Briglio, Viraj Khanduja, Justin D Lothan, Vasavi Rakesh Gorantla
This systematic review aimed to look at the effectiveness of venoarterial extracorporeal membrane oxygenation (VA-ECMO) therapy in treating fulminant myocarditis and evaluating the optimal length of time a patient should be placed on VA-ECMO. Fulminant myocarditis is a potentially life-threatening medical condition most commonly brought on by cardiogenic shock, which often progresses to severe circulatory compromise, requiring the patient to be placed on some form of mechanical circulatory assistance to maintain adequate tissue perfusion...
February 2024: Curēus
https://read.qxmd.com/read/38520339/industrially-scalable-textile-sensing-interfaces-for-extended-artificial-tactile-and-human-motion-monitoring-without-compromising-comfort
#7
JOURNAL ARTICLE
Fameng Wang, Haoyun Li, Pengpeng Hu, Yudong Wang, Fuwang Guan, Xuzhong Su, Mohammad Irfan Iqbal, Fengxin Sun
Smart wearables with the capability for continuous monitoring, perceiving, and understanding human tactile and motion signals, while ensuring comfort, are highly sought after for intelligent healthcare and smart life systems. However, concurrently achieving high-performance tactile sensing, long-lasting wearing comfort, and industrialized fabrication by a low-cost strategy remains a great challenge. This is primarily due to critical research gaps in novel textile structure design for seamless integration with sensing elements...
March 23, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38519429/exploring-how-the-arms-can-help-the-legs-in-facilitating-gait-rehabilitation
#8
REVIEW
Christopher J Arellano, Daisey Vega
Inspired by the ideas from the fields of gait rehabilitation, neuroscience, and locomotion biomechanics and energetics, a body of work is reviewed that has led to propose a conceptual framework for novel "self-assistive" walking devices that could further promote walking recovery from incomplete spinal cord injuries. The underlying rationale is based on a neural coupling mechanism that governs the coordinated movements of the arms and legs during walking, and that the excitability of these neural pathways can be exploited by actively engaging the arms during locomotor training...
March 22, 2024: Advanced biology
https://read.qxmd.com/read/38514699/role-of-compliant-mechanics-and-motor-control-in-hopping-from-human-to-robot
#9
JOURNAL ARTICLE
Aida Mohammadi Nejad Rashty, Maziar A Sharbafi, Omid Mohseni, André Seyfarth
Compliant leg function found during bouncy gaits in humans and animals can be considered a role model for designing and controlling bioinspired robots and assistive devices. The human musculoskeletal design and control differ from distal to proximal joints in the leg. The specific mechanical properties of different leg parts could simplify motor control, e.g., by taking advantage of passive body dynamics. This control embodiment is complemented by neural reflex circuitries shaping human motor control. This study investigates the contribution of specific passive and active properties at different leg joint levels in human hopping at different hopping frequencies...
March 21, 2024: Scientific Reports
https://read.qxmd.com/read/38511808/the-effects-of-exercise-on-cardiogenic-shock-with-an-intra-aortic-balloon-pump-a-case-report
#10
Vanessa M Ferreira, Dayane Nunes Rodrigues, Carlos Alberto Mendez Contreras, João M Rossi, Rui Fernando Ramos, Gustavo Oliveira, Mayron F Oliveira
This case report describes the exercise program on a hospitalized 54-year-old male patient with cardiogenic shock waiting for a heart transplant assisted by an intra-aortic balloon pump, a temporary mechanical circulatory support device. The temporary mechanical circulatory support device, an intra-aortic balloon pump, was placed in the left subclavian artery, enabling the exercise protocol. Measurements and values from Swan-Ganz catheter, blood sample, brain natriuretic peptide (NT-proBNP), and high-sensitivity C-reactive protein (hs-CRP), as well as the six-minute walk test (6MWT) and venous oxygen saturation (SvO2) were obtained before and after an exercise protocol...
2024: Arquivos Brasileiros de Cardiologia
https://read.qxmd.com/read/38511148/the-use-of-mechanical-circulatory-support-in-elective-high-risk-percutaneous-coronary-interventions-a-literature-based-review
#11
REVIEW
Alexander Geppert, Kambis Mashayekhi, Kurt Huber
Contemporary medical practices allow complete percutaneous coronary intervention (PCI) in a considerable number of patients who previously would have been considered too 'high-risk' for such procedures. The use of mechanical circulatory support (MCS) devices during these high-risk PCIs (HR-PCIs) is thought to reduce the potential risk for major adverse events during and after revascularization. The intra-aortic balloon pump (IABP), veno-arterial extracorporeal membrane oxygenation (V-A ECMO), and the Impella are the most common MCS devices in use...
March 2024: Eur Heart J Open
https://read.qxmd.com/read/38511081/the-spring-stiffness-profile-within-a-passive-full-leg-exoskeleton-affects-lower-limb-joint-mechanics-while-hopping
#12
JOURNAL ARTICLE
Stephen P Allen, Alena M Grabowski
Passive, full-leg exoskeletons that act in parallel with the legs can reduce the metabolic power of bouncing gaits like hopping. However, the magnitude of metabolic power reduction depends on the spring stiffness profile of the exoskeleton and is presumably affected by how users adapt their lower-limb joint mechanics. We determined the effects of using a passive, full-leg exoskeleton with degressive (DG), linear (LN) and progressive (PG) stiffness springs on lower-limb joint kinematics and kinetics during stationary, bilateral hopping at 2...
March 2024: Royal Society Open Science
https://read.qxmd.com/read/38508804/a-compressomyograph-train-of-four-monitoring-device
#13
JOURNAL ARTICLE
Shu Guo, Joe Moore, Lee Moradi, Eric Rosero, Ahmet C Sabuncu
The monitoring of the neuromuscular blockade is critical for patient's safety during and after surgery. The monitoring of neuromuscular blockade often requires the use of Train of Four (TOF) technique. During a TOF test two electrodes are attached to the ulnar nerve, and a series of four electric pulses are applied. The electrical stimulation causes the thumb to twitch, and the amount of twitch varies depending on the amount of neuromuscular blockade in patient's system. Current medical devices used to assist anesthesiologists to perform TOF monitoring often require free hand movement and do not provide accurate or reliable results...
March 2024: Medical Engineering & Physics
https://read.qxmd.com/read/38502121/electrostatic-smart-textiles-for-braille-to-speech-translation
#14
JOURNAL ARTICLE
Zhaoyang Li, Zhe Liu, Sumei Xu, Kaijun Zhang, Dazhe Zhao, Yucong Pi, Xiao Guan, Zhengchun Peng, Qize Zhong, Junwen Zhong
Wearable Braille-to-speech translation system is of great importance for providing auditory feedback in assisting blind people and people with speech impairment. However, previous reported Braille-to-speech translation systems still need to be improved in terms of comfortability or integration. Here, we report a Braille-to-speech translation system that uses dual-functional electrostatic transducers which are made of fabric-based materials and can be integrated into textiles. Based on electrostatic induction, the electrostatic transducer can either serve as a tactile sensor or a loudspeaker with the same design...
March 19, 2024: Advanced Materials
https://read.qxmd.com/read/38500751/advanced-hemodynamics-for-prognostication-in-heart-failure-the-pursuit-of-the-patient-specific-tipping-point
#15
JOURNAL ARTICLE
Jonathan Grinstein
BACKGROUND: Objective tools to define the optimal time for referral for advanced therapies and to help guide escalation and de-escalation of support can improve management decisions and outcomes for patients with advanced heart failure. The current parameters have variable prognostic potential depending on the patient population being studied and often have arbitrary thresholds. METHODS: Here, a mathematical and physiological framework to define the patient-specific tipping point of myocardial energetics is defined...
2024: Frontiers in Cardiovascular Medicine
https://read.qxmd.com/read/38500622/fabrication-of-zinc-oxide-nanorods-for-photocatalytic-degradation-of-docosane-a-petroleum-pollutant-under-solar-light-simulator
#16
JOURNAL ARTICLE
Ahmed K Alsharyani, L Muruganandam
The use of advanced oxidation processes (AOP) in photocatalysis is critical for treating hazardous chemical compounds in oil-produced water (OPW). ZnO NRs are one of the most important modern and safe photocatalysts and have been easily prepared by a microwave-assisted hydrothermal method and grown on glass substrates. Hexagonal-shaped ZnO NRs and a bandgap energy ( E g ) of up to 3.2 eV were characterized using SEM, XRD, UV-Vis, and PL devices, respectively. The effectiveness of photocatalytic degradation on the organic docosane solution was evaluated using a solar light simulator...
March 14, 2024: RSC Advances
https://read.qxmd.com/read/38495320/low-field-actuating-magnetic-elastomer-membranes-characterized-using-fibre-optic-interferometry
#17
JOURNAL ARTICLE
Zhi Li, Joanna M Coote, Swathika Subburaman, Francesco Iacoviello, Kristopher Page, Erwin J Alles, Polina Prokopovich, Ivan P Parkin, Adrien E Desjardins, Sacha Noimark
Smart robotic devices remotely powered by magnetic field have emerged as versatile tools for wide biomedical applications. Soft magnetic elastomer (ME) composite membranes with high flexibility and responsiveness are frequently incorporated to enable local actuation for wireless sensing or cargo delivery. However, the fabrication of thin ME membranes with good control in geometry and uniformity remains challenging, as well as the optimization of their actuating performances under low fields (milli-Tesla). In this work, the development of ME membranes comprising of low-cost magnetic powder and highly soft elastomer through a simple template-assisted doctor blading approach, is reported...
December 8, 2023: Advanced Functional Materials
https://read.qxmd.com/read/38493210/biomimetic-nanocluster-photoreceptors-for-adaptative-circular-polarization-vision
#18
JOURNAL ARTICLE
Wei Wen, Guocai Liu, Xiaofang Wei, Haojie Huang, Chong Wang, Danlei Zhu, Jianzhe Sun, Huijuan Yan, Xin Huang, Wenkang Shi, Xiaojuan Dai, Jichen Dong, Lang Jiang, Yunlong Guo, Hanlin Wang, Yunqi Liu
Nanoclusters with atomically precise structures and discrete energy levels are considered as nanoscale semiconductors for artificial intelligence. However, nanocluster electronic engineering and optoelectronic behavior have remained obscure and unexplored. Hence, we create nanocluster photoreceptors inspired by mantis shrimp visual systems to satisfy the needs of compact but multi-task vision hardware and explore the photo-induced electronic transport. Wafer-scale arrayed photoreceptors are constructed by a nanocluster-conjugated molecule heterostructure...
March 16, 2024: Nature Communications
https://read.qxmd.com/read/38490900/diagnosis-and-management-of-vasoplegia-in-temporary-mechanical-circulatory-support-a-narrative-review
#19
REVIEW
Jamel Ortoleva, Adam A Dalia, Dominic V Pisano, Alexander Shapeton
Refractory vasodilatory shock, or vasoplegia, is a pathophysiologic state observed in the intensive care unit and operating room in patients with a variety of primary diagnoses. Definitions of vasoplegia vary by source but are qualitatively defined clinically as a normal or high cardiac index and low systemic vascular resistance causing hypotension despite high-dose vasopressors in the setting of euvolemia. This definition can be difficult to apply to patients undergoing mechanical circulatory support (MCS)...
February 23, 2024: Journal of Cardiothoracic and Vascular Anesthesia
https://read.qxmd.com/read/38487275/efficacy-of-installation-of-temporary-bathing-transfer-aids-by-older-adults
#20
JOURNAL ARTICLE
Megan Rand, James Pelchat, Iris C Levine, Roger E Montgomery, Rebecca M Greene, Emily C King, Steven M Pong, Alison C Novak
Grab bars facilitate bathing and reduce the risk of falls during bathing. Suction cup handholds and rim-mounted tub rails are an alternative to grab bars. The objective of this study was to determine whether older adults could install handholds and tub rails effectively to support bathing transfers. Participants installed rim-mounted tub rails and suction cup handholds in a simulated bathroom environment. Installation location and mechanical loading performance were evaluated. Participant perceptions during device installation and a bathing transfer were characterized...
2024: Gerontology & Geriatric Medicine
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