Articles Related to Heart Valve Testing

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 …

Other Products Cited:  SuperPump

Visit Source 
Deepa SritharanParinaz FathiJason D. WeaverStephen M. RettaChangfu WuNandini Duraiswamy - Cardiovascular Engineering and Technology pp 1–14

After implantation of a transcatheter bioprosthetic heart valve its original circular circumference may become distorted, which can lead to changes in leaflet coaptation and leaflets that are stretched or sagging.... … Valve hydrodynamic performance data were collected using a commercially available left heart Pulse Duplicator (Vivitro Systems) at 0, 41, 80, and 123 M cycles; at these intervals, the valves mounted in the metallic adapter …

Other Products Cited:  Pulse Duplicator

Visit Source 
K Davis, JH Muller, CJ Meyer, FE Smit - (SAIBMEC), 2018 3rd Biennial South African, 2018

...The air volume shifts the pressure and flow rate waveforms in time and impact the physical operating conditions of the valves with constant input settings in the ViVitest software... … Results obtained from current pulse duplicators are subject to the setup and physical testing settings. The ViVitro Pulse Duplicator from ViVitroLabs Inc … Three different valves were tested in a ViVitro pulse duplicator where...

Other Products Cited:  Ex ViVo Simulation  Pulse Duplicator

Visit Source 
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 …

Other Products Cited:  Heart Valve Repair  SuperPump

Visit Source 
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 …

Other Products Cited:  Heart Valve Repair  SuperPump

Visit Source 
J Sathananthan, JG Webb - Catheterization and Cardiovascular Interventions, 2018

Transcatheter aortic valve implantation can be successful in selected patients with annuli beyond the current recommended limits for available transcatheter heart valves.… Hopefully in future we will have both a broader understanding and a broader range of options. Conflict of interest. Dr. Webb is a consultant to Edwards Lifesciences and ViVitro Labs. Publication cover image. Volume 91, Issue 6. May 1, 2018. Pages 1157-1158

Other Products Cited:  Pulse Duplicator

Visit Source 
H Saaid, P Segers, M Novara, T Claessens, P Verdonck - Experiments in Fluids, 2018

...The effects of the orientation of a prosthetic mitral valve in anatomical and anti-anatomical configurations have been investigated during the diastolic filling time... … A commercially available cardiovascular simulator (Vivitro Systems, Inc., Victoria, BC, Canada) that can impose and monitor different physiological pressure and flow conditions was adopted. The hydraulic piston pump was connected to the inner tank …

Other Products Cited:  Flow Visualization  Pulse Duplicator

Visit Source 
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  SuperPump

Visit Source 
Chung-Dann Kan, MD, PhD, Jieh-Neng Wang, PhD, Wei-Ling Chen, PhD, Pong-Jeu Lu, PhD, Ming-Yao Chan, PhD, Chia-Hung Lin, PhD, Wan Chin Hsieh, MD The Journal of Thoracic and Cardiovascular Surgery, September 2017

...The current study investigated: (i) the function of the ePTFE trileaflet-valved conduits in an ex vivo experimental system and (ii) the short-term performance of the conduit in a porcine model to verify their clinical applicability.... ... valves. 168 Right ventricular function was simulated by using a digitally controlled hydraulic piston 169 SuperPump (ViViTro Labs, Victor, British Columbia, Canada), which generated a pulsating 170 flow to drive the chamber and send it into a compliant pulmonary artery. ...

Other Products Cited:  Pulse Duplicator

Visit Source 
Retta SM, Kepner J, Marquez S, Herman BA, S Shu MC, Grossman LW J Heart Valve Dis. 2017 Jan;26(1):72-80.

One of the first steps in qualifying a new prosthetic valve for eventual clinical use is preclinical flow performance testing in vitro... ...This collaborative effort between heart valve manufacturers and the Food and Drug Administration (FDA) was designed to evaluate the variability of the pulse duplicator test technology for pulsatile flow performance measurement in an interlaboratory round robin... ...A commercially available duplicator, the Vivitro system (Vivitro, Inc., Vancouver, Canada), was used at two centers. The design specifications are summarized in Table I....

Other Products Cited:  Pulse Duplicator

Visit Source 
Yen Ngoc NguyenMunirah IsmailFoad KabinejadianChi Wei OngEdgar Lik Wui TayHwa Liang Leo - Cardiovascular Engineering and Technology 2017

The increased understanding of right heart diseases has led to more aggressive interventions to manage functional tricuspid regurgitation (FTR)... ...In this study, a novel in vitro mock circulatory system that incorporated a realistic tricuspid valve apparatus in a patient-specific silicon right ventricle (RV) was designed and fabricated... ... A closed ventricular chamber housing the silicon RV model was connected to a closed atrial chamber at one end, and was directly connected to the pulsatile wave-generating piston pump (SuperPump AR series, ViVitro Labs Inc., Victoria, BC, Canada) at the other end to simu ...

Other Products Cited:  Pulse Duplicator

Visit Source 
Ng, Daniel Wai Hung. Neo, Si Yang. Ng, Chung Liu. Wong, Benedict Jun Shuan. Singapore Polytechnic School of Mechanical & Aeronautical Engineering

...Mechanical valves usually made from metal and fabrics are very durable but they have poor hemodynamic and are thrombogenic requiring permanent anticoagulation. Tissue heart valves constructed from biological tissues have excellent hemodynamic blood flow, but they lack durability. The project proposed a new valve design that is similar to a stentless tissue valve but made from a synthetic material, Polytetrafluoroethylene (PTFE)... The scope of this project includes designing a fixture to accommodate the valves in the ViVitro System and studying hemodynamic parameters such as pressure drop, flow rate, and dynamic leaflet behaviour of the valves. ...

Other Products Cited:  Pulse Duplicator

Visit Source 
Wentao Feng, Xianda Yang, Yang Liu, Yubo Fan Artificial Organs, 24 February 2017

Clinically, the percutaneous transcatheter aortic valve (TAV) has been reported to be deformed in a noncircular configuration after its implant. The deformation is universal and various, and it leads to serious leakage and durability problems. ...the present study investigated the effects of the aortic annulus deformation and the leaflet tissue thickness on the hydrodynamics of the TAV. ... Hydrodynamic testing. The TAVs were tested in a quasi-physiological artery pulsatile flow duplicator system, which was custom remoulded to adapt the testing of deformed TAV from commercially available pulse duplicator (Pulse Duplicator; Vivitro Labs, Victoria, BC, Canada.). ...

Other Products Cited:  Pulse Duplicator

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:  SuperPump

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:  SuperPump

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:  SuperPump

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:  SuperPump

Visit Source 
Nandini Duraiswamy , Jason D. Weaver, Yasamin Ekrami, Stephen M. Retta, Changfu Wu Cardiovascular Engineering and Technology pp 1-13 First online: 10 February 2016

... The hydrodynamic testing was per- formed using 0.9% saline solution in the commercially available Left Heart Simulator (Vivitro Systems), which simulates function of the heart by generating pulsatile flow through prosthetic heart valves. ...In the EllipMinor and EllipMajor configurations, the maximum principal stress occurred near the center of the free edge of the “stretched” leaflets. These results further affirm recommendations by the International Standards Organization (ISO) that pre-clinical testing should consider non-circular configurations for transcatheter valve durability testing.

Other Products Cited:  Pulsatile Flow Simulation  Pulse Duplicator

Visit Source 
Joseph Calderan, Wenbin Mao, Eric Sirois and Wei Sun-- Artificial Organs article first published online: 29 OCT 2015 DOI: 10.1111/aor.12589

Impairment of coronary artery flow, in either acute or chronic conditions, is a severe complication of transcatheter aortic valve (TAV) implantation, which can arise due to improper TAV positioning. ... LHS. An LHS was designed with the intention of providing physiological flow and pressure waveforms in the left atrium, left ventricle (LV), and ascending aorta, similar to commercially available devices such as the ViVitro LHS (ViVitro Labs, Victoria, Canada) but with additional ...

Other Products Cited:  Pulse Duplicator

Visit Source 
Burriesci G, Marincola FC, Zervides C. J Med Eng Technol. 2010 Jan;34(1):7-22. doi: 10.3109/03091900903261241

Polymeric heart valves could offer an optimum alternative to current prostheses, by joining the advantages of mechanical and bioprosthetic valves. Though a number of materials suitable for this application have recently become available, significant improvements in the valve design are still needed. In this paper, a novel polymeric heart valve design is proposed and its optimization procedure, based on the use of finite elements, is described...

Other Products Cited:  Pulse Duplicator

Visit Source 

STAY UPDATED

Sign up for our newsletter today

Website Survey

Answer a few questions about our website and we'll enter you into draw for a limited edition KENEK EDGE Pulse Oximeter.

Prizes will be shipped to 5 North American survey respondents that include their email contact information.

Take Survey No Thanks