Tsukuba Remote Monitoring System for Continuous‐Flow Artificial Heart

Kosaka, Ryo; Sankai, Yoshiyuki; Takiya, R.; Jikuya, Tomoaki; Yamada, Takashi; Tsutsui, Tatsuo

doi:10.1046/j.1525-1594.2003.00037.x

Cited by 18 publications

(7 citation statements)

References 14 publications

(17 reference statements)

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“…In the mock‐up circulation study, we confirmed the effective measurement performance of the developed mass flow meter. The developed mass flow meter would be essential not only to online monitoring of hospital patients, but also to the remote monitoring of discharged patients (10).…”

Section: Resultsmentioning

confidence: 99%

Development of Miniaturized Mass Flow Meter for an Axial Flow Blood Pump

et al. 2007

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To grasp the conditions of patients and implantable artificial hearts, it is essential to monitor the blood flow rate continuously and noninvasively. However, it is difficult to monitor the pump flow rate in an implantable artificial heart, because the conventional flow meter is too large to implant into the human body, and the flow estimation method is influenced by changes in the blood characteristics and the pump performance. In particular, the power consumption has neither linearity nor uniqueness with respect to the pump flow rate in an axial flow blood pump. In this research, we develop a prototype miniaturized mass flow meter that uses centrifugal force F(c) for discharged patients with an axial flow blood pump. This flow meter measures the F(c) corresponding to the mass flow rate, and implements compensation for static pressure. Because the strain gauges are attached outside of the curved tube, this mass flow meter has no blood contact point, resulting in a compact design. To evaluate the measurement accuracy and the tracking performance, the mass flow meter was compared with the conventional ultrasonic flow meter in a mock-up circulation study. As a result, the measurement error ranging from 0.5 to 5.0 L/min was less than +/-10% with respect to the maximum flow rate. The tracking performance of pulsation flow was approximately equivalent to that of the conventional flow meter. These experiments demonstrated that the prototype miniaturized mass flow meter using F(c) could accurately measure the mass flow rate continuously and noninvasively.

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Section: Resultsmentioning

confidence: 99%

Development of Miniaturized Mass Flow Meter for an Axial Flow Blood Pump

et al. 2007

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“…The animal experiments were conducted for 3, 15, 29, and 35 days. For the monitoring of the animal and the device during the test period, a remote monitoring system with Website and mobile phone was used (7).…”

Section: Methodsmentioning

confidence: 99%

Antithrombogenic Properties of a Monopivot Magnetic Suspension Centrifugal Pump for Circulatory Assist

et al. 2008

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The National Institute of Advanced Industrial Science and Technology (AIST) monopivot magnetic suspension centrifugal pump (MC105) was developed for open-heart surgery and several weeks of circulatory assist. The monopivot centrifugal pump has a closed impeller of 50 mm in diameter, supported by a single pivot bearing, and is driven through a magnetic coupling to widen the fluid gap. Design parameters such as pivot length and tongue radius were determined through flow visualization experiments, and the effectiveness was verified in preliminary animal experiments. The maximum overall pump efficiency reached 18%, and the normalized index of hemolysis tested with bovine blood was as low as 0.0013 g/100 L. Animal experiments with MC105 were conducted in sheep for 3, 15, 29, and 35 days in a configuration of left ventricle bypass. No thrombus was formed around the pivot bearing except when the pump speed was reduced by 20% of normal operational speed, which reduced the pump flow by 40% to avoid inlet suction. Subsequently, the antithrombogenic design was verified in animal experiments for 5 weeks at a minimum rotational speed of greater than 1500 rpm and a minimum pump flow greater than 1.0 L/min; no thrombus formation was observed under these conditions.

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“…The video signal of the front end of the system can directly enter the Ethernet and Intranet network. Authorized users can monitor the scene in anywhere through Web browsers [9,14]. It can access the Internet locally, and can also be remotely netted through a modem.…”

Section: Wenbo Fu and Debnath Narayanmentioning

confidence: 99%

Optimization algorithm for embedded Linux remote video monitoring system oriented to the internet of things (IOT)

Wenbo¹,

Narayan²

2019

Discrete &Amp; Continuous Dynamical Systems - S

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At present, the remote video monitoring system has the problem of weak anti-interference ability and poor response of the system. Therefore, the video image is not clear. On the basis of the Internet of things (IOT), a design method of embedded Linux remote video monitoring system is proposed. The method is based on ARM+Linux development platform, the 301V USB camera of Vimicro is used to collect images, to make preprocessing, and improve the system's response. The embedded Linux operating system is used to realize the functions of data acquisition and transmission of video image. The fractal wavelet of multivariate statistical model is used to denoise the video image so as to improve the anti-interference of the system. The experimental results show that the method has strong anti-interference ability and good response to the system. 2010 Mathematics Subject Classification. 19J25.

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Tsukuba Remote Monitoring System for Continuous‐Flow Artificial Heart

Cited by 18 publications

References 14 publications

Development of Miniaturized Mass Flow Meter for an Axial Flow Blood Pump

Development of Miniaturized Mass Flow Meter for an Axial Flow Blood Pump

Antithrombogenic Properties of a Monopivot Magnetic Suspension Centrifugal Pump for Circulatory Assist

Optimization algorithm for embedded Linux remote video monitoring system oriented to the internet of things (IOT)

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