Articles Related to SuperPump

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 ...

Other Products Cited:  Flow Visualization  Heart Valve Testing

Visit Source 
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. ...

Other Products Cited:  Flow Visualization

Visit Source 
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. ...

Other Products Cited:  Flow Visualization

Visit Source 
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. ...

Other Products Cited:  Ultrasound Measurements

Visit Source 
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.

Other Products Cited:  Pulsatile Flow Simulation

Visit Source 
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 ...

Other Products Cited:

Visit Source 
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...

Other Products Cited:

Visit Source 
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 ...

Other Products Cited:  Pulsatile Flow Simulation

Visit Source 
Keyvan Amini Khoiy, Dipankar Biswas, Thomas N Decker, Kourosh T Asgarian, Francis Loth and Rouzbeh Amini Circulation November 11, 2016, Volume 134, Issue Suppl 1

...study to establish a framework for the measurement of the deformation of TV leaflets in a passive ex-vivo beating heart that mimicked the right ventricular dynamic pressure of the normal hearts. ...apexes of fresh porcine hearts (n= 8) were connected to a positive displacement pump (SuperPump AR Series, Vivitro Labs Inc., BC) to generate pulsatile flow in the right side of the hearts. The superior vena cava was connected to a reservoir as the inflow pathway and the pulmonary artery was used for the outflow pathway...

Other Products Cited:  Ex ViVo Simulation

Visit Source 
E. Foucaulta, S. Hubersona, P. Brauda, D. Coisneb European Journal of Mechanics-B/Fluids Available online 17 November 2016

...study investigates pulsatile flow through models of junctions corresponding to geometries most usually observed in the major coronary artery, with and without stent. ... 31] and [32]. 2.2. Experimental setup. The mean flow has its source in a tank set at constant height, the oscillatory flow is driven by a piston pump (Model SPS 3891,Vivitro Systems, Canada) as shown in Fig. 1. The oscillatory ...

Other Products Cited:

Visit Source 
Esmé J. Donselaar, MD, Andrew Holden, FRANZCR, EBIR, Aleksandra C. Zoethout, BSc, Clark J. Zeebregts, MD, PhD, Michel M. P. J. Reijnen, MD, PhD Journal of Endovascular Therapy Nov 17, 2016

Purpose: To describe the feasibility and technical aspects of a proximal Nellix-in-Nellix extension to treat caudal stent-graft migration after endovascular aneurysm sealing (EVAS) in the in vitro and in vivo settings. ... Silicone anatomical models were used in conjunction with a pulsatile flow pump (SuperPump; Vivitro Labs Inc, Victoria, British Columbia, Canada). The system was tuned to a pressure of ~120/80 mm Hg, with 4.5- to 5-L/min flow at a rate of 70 beats/min. ...

Other Products Cited:  Endovascular Simulator

Visit Source 
Keyvan Amini Khoiy, Dipankar Biswas, Thomas N. Decker, Kourosh T. Asgarian, Francis Loth and Rouzbeh Amini; Journal of Biomechanical Engineering revised August 23, 2016

...For the first time, the porcine valve leaflets deformation was measured in a passive ex-vivo beating heart without isolating and remounting the valve annuli. In particular, the right ventricular apexes of porcine hearts (n = 8) were connected to a pulse-duplicator pump that maintained a pulsatile flow from and to a reservoir connected to the right atrium and the pulmonary arteries... A positive displacement pump 116 (SuperPump AR Series, Vivitro Labs Inc., BC, Canada) was connected to the apex of the right 117 ventricle after an incision was carefully made at this location (as described in more detail below)...

Other Products Cited:  Ex ViVo Simulation

Visit Source 
Munirah Ismail, Gideon Praveen Kumar, Foad Kabinejadian, Yen Ngoc Nguyen, Fangsen Cui, Edgar Lik Wui Tay, Hwa Liang Leo - Cardiovascular Engineering and Technology pp 1-16 First online: 29 June 2016

Transcatheter tricuspid valves are implanted onto the cavoatrial junction in order to avoid the challenging task of anchoring the valve onto the complex tricuspid valve annulus. ...little is known about optimum extent of oversizing of the valved stent in a vena cava. In this study, we implanted valves of the same diameter onto the larger sized inferior vena cava (IVC) and a smaller sized superior vena cava (SVC). ... that half of the valve protrudes out of the vena cava. This is to comply with the anatomical constraint of not occluding the hepatic vein. The pulsatile flow loop was driven by a wave-generating piston pump (SuperPump AR series, ViVitro Labs Inc., Victoria, BC, Canada). ...

Other Products Cited:

Visit Source 
Sean Guo-Dong Tan, Sangho Kim, Hwa Liang Leo Experiments in Fluids June 2016, 57:110

Mechanical heart valve prostheses are often implanted in young patients due to their durability and long-term reliability. However, existing designs are known to induce elevated levels of blood damage and blood platelet activation... ...This study proposes a bi-leaflet mechanical heart valve design (Bio-MHV) that mimics the geometry of a human mitral valve, with the aim of reducing turbulence levels in the left ventricle by replicating physiological flow patterns... ... A pulsatile pump (ViVitro Labs Inc., Victoria, BC) attached to the working chamber drove the blood analog around the flow loop, via the pumping action of the silicon left ventricle, as shown in Fig. 1c. Fig. 2 a A mitral flow waveform sample observed in the experiments. ...

Other Products Cited:  Pulsatile Flow Simulation

Visit Source 
John Davidson, Sangjin Ryu Journal of Visualization pp 1-9 First online: 30 May 2016

Soap bubble blowing has long been an amusement for humans, and the process involves pinch-off similarly to liquid drops and gas bubbles. ... 2.4.2 Measurement using a Pitot tube. To validate the image-based speed measurement, we measured the airflow speed at the center of the nozzle outlet (U e ) using a Pitot static tube (PAA-8-KL, United Sensor Corp.) with pressure transducers (Pulse Duplicator, ViVitro Labs). ...

Other Products Cited:  Pressure Measurement System

Visit Source 
Bernhard M. Vennemann , Thomas Rösgen, Thierry P. Carrel, Dominik Obrist - Article Cardiovascular Engineering and Technology pp 1-13 First online: 13 May 2016

The Lapeyre-Triflo FURTIVA valve aims at combining the favorable hemodynamics of bioprosthetic heart valves with the durability of mechanical heart valves (MHVs). ... physiological con- ditions. It is driven by a peristaltic pump (Superpump, Vivitro Systems, Victoria, BC, Canada) (1) which generates a directed pulsatile flow through the test section (3). The net flow through the transparent test section is ...

Other Products Cited:  Heart Valve Testing

Visit Source 
Guo-Dong Sean Tan and Hwa Liang Leo - J. Med. Devices 10(2), 020910 (May 12, 2016) (3 pages)

... physiological conditions. It is driven by a peristaltic pump (Superpump, Vivitro Systems, Victoria, BC, Canada) (1) which generates a directed pulsatile flow through the test section (3). The net flow through the transparent test section is ...

Other Products Cited:  Heart Valve Testing

Visit Source 
Simon Heide-Jørgensen, Sellaswasmy Kumaran Krishna, Jonas Taborsky, Tommy Bechsgaard, Rachid Zegdi and Peter Johansen J Biomech Eng 138(3), 034504 (Jan 29, 2016) (7 pages)

The aim of this study was to develop a platform for noncontact TAVI valve deformation analysis with both high temporal and spatial resolutions based on stereophotogrammetry and digital image correlation (DIC). A left-heart pulsatile in vitro flow loop system for mounting of TAVI valves was designed. ... Based on a piston pump (ViVitro SuperDup'r pump, ViVitro systems, Victoria, BC, Canada) a left-heart in vitro flow loop with peripheral units comprising a ventricular chamber, an atrial reservoir, an aortic root in which test valves can be installed, an arterial compliance section ...

Other Products Cited:  Heart Valve Testing

Visit Source 
Morgane Evin, Carine Guivier-Curien, Philippe Pibarot, Lyes Kadem and Régis Rieu

... Jude Medical size 23 mm, a resistance and a compliance). The BMHV to be tested is placed directly between the left atrium and the left ventricle molds. The activation of the left ventricle is performed by a Vivitro superpump (VivitroLabs, Victoria, BC, Canada). ...

Other Products Cited:  Heart Valve Testing

Visit Source 
Erwan Salauna, Anne-Sophie Zensesb, Morgane Evinb, Frédéric Collartd, Gilbert Habiba, Philippe Pibarote, Régis Rieub International Journal of Cardiology Available online 8 January 2016

This in-vitro study aims to assess and compare the valve hemodynamic performances of the Edwards SAPIEN transcatheter heart valve (THV) in the different current conditions of use: important oversizing in small circular annuli and in elliptical annuli, moderate oversizing in circular and in elliptical annuli of various degrees of eccentricity.

Other Products Cited:

Visit Source 

STAY UPDATED

Sign up for our newsletter today