Articles Related to SuperPump

Yuriy TASINKEVYCH, Marcin LEWANDOWSKI, Ziemowit KLIMONDA, Mateusz WALCZAK - Polish Academy of Sciences ARCHIVES OF ACOUSTICS Vol. 43, No. 3, pp. 437–446 (2018)

Commercially available cardiac scanners use 64–128 elements phased-array (PA) probes and classical delay-and-sum beamforming to reconstruct a sector B-mode image... ...The goal of this study was to show the feasibility of reducing the channel count in the diverging wave synthetic aperture image reconstruction method for phased-arrays.... … a water tank with dedicated absorbers at- tenuating the reflected waves (Aptflex F28 and Aptflex F28P, Precision Acoustics, UK), tubing system, wind- kessel (to reduce/eliminate phantom vibrations), Viv- itro Superpump …

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Charles H. Bloodworth MS IV Eric L. Pierce PhD Keshav Kohli MS Nancy J. Deaton BS Kaitlin J. Jones BS Radhika Duvvuri BS Norihiko Kamioka MD Vasilis - C. Babaliaros MD Ajit P. Yoganathan PhD - Catheterization and Cardiovascular Interventions 09 August 2018

...Leaflet tethering commonly seen in functional mitral regurgitation may be a significant factor affecting the severity of MS after MitraClip implantation... … conditions. A piston pump (Vivitro Labs Inc. Victoria, Canada) drove physiological left heart flow within the simulator, while an electromagnetic flow probe (Carolina Medical Electronics, East Bend, NC) measured cardiac output (CO) …

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Hongliang Li, Jonathan Porée, Marie-Hélène, Roy Cardinal, Guy Cloutier - Ultrasonics Available online 21 July 2018, In Press

Polar strain (radial and circumferential) estimations can suffer from artifacts because the center of a nonsymmetrical carotid atherosclerotic artery, defining the coordinate system in cross-sectional view, can be misregistered... ...Two-affine model-based estimators for vascular ultrasound elastography in cross-sectional view of the artery are evaluated in a common framework of high-frame-rate imaging... ...This paper presents two affine model-based estimators, the affine phase-based estimator (APBE) developed in the framework of transverse oscillation (TO) beamforming, and the Lagrangian speckle model estimator (LSME)...

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João Gomes-Fonseca ; Pedro Morais ; Sandro Queirós ; Fernando Veloso ; António C. M. Pinho ; Jaime C. Fonseca ; Jorge Coreia-Pinto ; João L. Vilaça - 2018 IEEE 6th International Conference on Serious Games and Applications for Health (SeGAH)

This work aims to create a dynamic, ultrasound-compatible, realistic and flexible phantom of the left and right ventricles, with application in the diagnosis, planning, treatment and training in the cardiovascular field for studies using echocardiography. … the real tissues. Then, a commercial available computed-controlled dynamic piston pump (Vivitro Labs, Victoria, British Columbia, Canada) was used to pump water... into the model and consequently deform it. This pump system

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P Yu Electronic Theses & Dissertations (ETDs) (2011-) [3339] 2018

...This study focuses on investigating the hemodynamics inside an aneurysm for different inflow conditions and varying geometrical shapes. ... … precisely controlled. Re and α were varied between 50-250 and 2-5, respectively. A ViVitro Labs pump system was used to pump the fluid and Particle Image Velocimetry (PIV) was used to perform velocity measurements. The flow …

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R Kotzé, L Deorsola - 2018 Design of Medical Devices Conference, 2018

Mitral subvalvular apparatus plays an important role in mitral and ventricular dynamics by preserving annuloventricular continuity, known to be fundamental for ventricular function... ...We address these issues through the design of a novel semistented and chorded mitral valve that better mimics the native mitral annulus, leaflets and chordae function and can be made from off-the-shelf biomaterials with the potential to be implanted percutaneously... … Pulse duplicator setup We performed hydrodynamic testing in the mitral position on a hydro-mechanical pulse duplicator system (Vivitro Superpump System SP3891, Vivitro, Victoria, BC, Canada), described elsewhere [4]. We used a 25mm Sorin Bicarbon bileaflet …

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Wei-Ling ChenChiu-Chin WuChung-Dann Kan - World Congress on Medical Physics and Biomedical Engineering 2018 pp 519-524

...Percutaneous pulmonary valve implantation (PPVI) has evolved as most exciting development surgical strategy with dysfunctional right ventricle-pulmonary artery conduits. ... ...The purpose of this study is to investigate the hemodynamic and functional consequences of the new design using a mock circulation system... … vasculature. Blood pressures and flows are driven by a digitally controlled hydraulic piston pump (ViViTro Labs Inc., Super Pump System, Victor, BC) to produce pulsatile waves with heart rates of 60 and 80 beats/min from ARV to ARA …

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Wei-Ling Chena, Chia-Hung Linb, Jieh-Neng Wangc, Pong-Jeu Lud, Ming-Yao Chand, Jui-Te Wue, Chung-Dann Kanf

...This study proposes an assistive technology to quantify regurgitation using the regurgitation fraction (RF) and heart pump efficiency (HPE). … pulmonary valves. The blood pressure and flow were driven by a digitally controlled hydraulic piston pump (ViViTro Labs Inc., Super Pump System, Victor, BC) to produce pulsatile waves with heart rates of 60 and 80 beats/min. The …

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Jahren SE, Hurni S, Heinisch PP, Winkler B, Obrist D, Carrel T, Weber A - Interactive CardioVascular and Thoracic Surgery 26 (2018) 248–256

Many surgical and interventional methods are available to restore patency for patients with degenerative severe mitral valve regurgitation... ...Eight porcine mitral valves were tested under pulsatile flow conditions in an in vitro pulsatile flow loop for haemodynamic quantification.... ...All surgical reconstruction techniques were able to sufficiently correct the acute mitral valve regurgitation.... ...The LV chamber was actuated using a computer-controlled piston pump (ViVitro Systems Inc., Victoria, Canada) attached to the LV chamber...

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Silje Ekroll Jahren, Paul Philipp Heinisch, David Haslera, Bernhard Michael Winkler, Stefan Stortecky, Thomas Pilgrim, Martina Correa Londono, Thierry Carrel, Hendrik von Tengg-Kobligk and Dominik Obrist - Interactive CardioVascular and Thoracic Surgery (2018) 1–8

Bioprosthetic valve thrombosis has been considered uncommon, but recent studies have shown that it is more frequent than previously thought. ...Two compliant aortic root phantoms with different morphologies (symmetrical and patient-specific) were fabricated with silicone. A bioprosthetic aortic valve was inserted in both phantoms.... ...Blood flow in the aortic root and the washout of the sinus portion are significantly affected by aortic root morphology.... ...The flow loop was actuated by a piston pump (ViVitro Systems Inc., Victoria, BC, Canada)...

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Marije E. Kamphuis; Gert Jan Pelgrim; Marcel J. W. Greuter; Riemer H. J. A. Slart; Cornelis H. Slump Proceedings Volume 10577, Medical Imaging 2018: Image Perception, Observer Performance, and Technology Assessment; 1057714 (2018); doi: 10.1117/12.2286337 Event: SPIE Medical Imaging, 2018, Houston, Texas, United States

...Myocardial perfusion imaging (MPI) is a commonly used diagnostic method in coronary artery disease (CAD)... ... In line with proper clinical decision-making, it is essential to assess institutional MPI test validity by confronting MBF assessment to a ground truth. Our research focuses on developing such validation instrument/method for MPI by means of simulating controlled myocardial perfusion in a phantom flow setup.... … All the data presented in this paper were obtained with the open circuit setup to prevent contrast recirculation. The used piston pump (Vivitro Superpump, Vivitro Labs, Victoria, Canada) generates programmable pulsatile flow

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S Houser, I Okafor, V Raghav, A Yoganathan - Journal of Visualization First Online: 16 February 2018

...The objective of this study was to characterize three distinct orientations (30°, 60° and 90°) of the non-parallel jet–vortex interaction in a simplified flow loop... … 1 Experimental setup of jet–vortex interaction flow loop. A programmable pulsatile pump (ViVitro SuperPump) allowed for controlled, isolated vortex rings to be ejected into the chamber, as shown in Fig. 2. The flow profile for vortex ring ejection is shown in Fig …

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Munirah Ismail, Foad Kabinejadian, Yen Ngoc Nguyen, Edgar Tay Lik Wui, Sangho Kim, Hwa Liang Leo - - Medical Engineering and Physics October 25, 2017

...The study utilises both 2-D and 3-D particle image velocimetry (PIV) to interrogate the flow patterns in the vicinity of the extra-cardiac tricuspid valves in an in vitro physiological flow loop, specifically at four measurement locations in the cavo-atrial anatomy. ... ... of the hepatic vein. In contrast, the SVC valve was fully implanted in the SVC. The mock circulatory system was driven by a pulse generator (SuperPump AR series, ViVitro Labs Inc., Victoria, BC, Canada). It comprised of an ultrasonic ...

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W Conlin, P Yu, V Durgesh - Bulletin of the American Physical Society, 2017

...The objective of this study is to identify the large-scale structures in the aneurysm, study temporal behavior, and quantify their interaction with the inflow condition. ... ... For this purpose, detailed Particle Image Velocimetry (PIV) measurements were performed at the center plane of an idealized aneurysm model for a range of inflow conditions. Inflow conditions were precisely controlled using a ViVitro SuperPump system. ...

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P Yu, V Durgesh, H Johari - Bulletin of the American Physical Society, 2017

...Studies have shown that hemodynamics is integral to developing an understanding of aneurysm formation, growth, and rupture. This investigation focuses on a comprehensive study of the impact of varying inflow conditions and aneurysm shapes on spatial and temporal behavior of flow parameters and structures in an aneurysm.... ... For this purpose, detailed Particle Image Velocimetry (PIV) measurements were performed at the center plane of an idealized aneurysm model for a range of inflow conditions. Inflow conditions were precisely controlled using a ViVitro SuperPump system. ...

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FM Cardoso, SS Furuie - Proc. of SPIE Vol, 2017

Ultrasound elastography has become an important procedure that provides information about the tissue dynamics and may help on the detection of tissue abnormalities. We propose a novel algorithm to perform speckle tracking, which consists in an implementation of 2D Block Matching with two enhancements: sub-pixel linear interpolation and displacement propagation, which are able to increase resolution, reduce computation time and prevent kernel mismatching errors. ... studies on their numerical analogs. Fig. 1 Section of the f20dX LV phantom. Dimensions in [mm]. METHODS Fig. 2 Experimental setup. 1 – GE Vivid 6 scanner; 2 – water tank; 3 – LV model; 4 – M4S-RS probe; 5 – windkessel; 6 – Vivitro Superpump; 7 – Pump Controller; 8 – PC. ...

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Lim, Brian. Muhammad Mujahid. Tan, Rong Wang. Arunkumar, U. Singapore Polytechnic School of Mechanical and Aeronautical Engineering

Coronary heart disease (CHD) is a common cardiac disorder in which a portion of the coronary artery is blocked, leading to a potential heart attack. Timely and accurate evaluation of suspected CHD patients is critical. Computer Tomography Angiography (CTA)... In order to streamline the evaluation of suspected CHD patients, we propose to create a more accurate and consistent diagnostic method of interpreting CTA results.

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S. Hamed Alavi, Marc Soriano Baliarda, Noemi Bonessio, Lorenzo Valdevit, Arash Kheradvar: Annals of Biomedical Engineering First Online: 22 December 2016

...The main problem with the tissue engineered heart valves is their progressive deterioration that leads to regurgitation and/or leaflet thickening a few months after implantation... ...The current work aims to study the effects of the design features on mechanical characteristics of this valve scaffold to attain proper function prior to in vivo implantation. ... The heart flow simulator system was adjusted for left ventricular pressure waveform with diastolic/systolic pressures of 80/120 mmHg produced by a hydraulic pump system (Superpump system, VSI, SPS3891, Vivitro systems Inc., Victoria, BC, Canada).10 The scaffolds were ...

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Apoorva Girish, MD, Muralidhar Padala, PhD, Kanika Kalra, MD, Bryant V. McIver, MD, Ravi K. Veeraswamy, MD, Edward P. Chen, MD, and Bradley G. Leshnower, MD: Ann Thorac Surg. 2016 Dec;102(6):1925-1932. doi: 10.1016/j.athoracsur.2016.05.020. Epub 2016 Jul 15.

Partial false lumen (FL) thrombosis is a risk factor for long-term mortality in acute type B aortic dissection (ATBAD). This study investigates FL pressures in models of ATBAD with patent and partially thrombosed FL... ...A programmable pulsatile pump (SuperPump; ViVitro Systems, Victoria, BC, Canada) was connected to the left ventricle through a cannula inserted into the apex... ...In a biologic model of ATBAD, the number, location, and FL thrombosis status determine FL pressure. In the setting of partial FL thrombosis, the FL pressure is reduced with proximal tear occlusion and increased with distal tear occlusion. Reduced FL pressure is related to retrograde flow...

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Ahmad Falahatpisheha, Daisuke Morisawaa, Taraz T. Tooskyb, Arash Kheradvara Journal of Biomechanics Available online 16 November 2016

...developed a novel polymeric valve whose leaflets possess calcium hydroxyapatite inclusions immersed in them. This study reports the characteristics and feasibility of these valves. ... The system is connected and actuated by a pulsatile pump system (Superpump system, VSI, SPS3891, Vivitro systems Inc., Victoria, BC, Canada), which operates based on a VSI Wave Generator VG2001 (Vivitro Systems Inc., Victoria, BC, Canada) and controlled by a ...

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