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Angiographic Quantification of Contrast Medium Washout from Cerebral Aneurysms after Stent Placement
Chander Sadasivana, Baruch B. Lieberc, Matthew J. Gounisc, Demetrius K. Lopese and L. N. Hopkinsb; American Journal of Neuroradiology: 23; 1214-1221.
Other Products Cited: Flow Visualization Pulse Duplicator Stent and Stent/Graft
Visit SourceC. C. M. Rindt, A. A. van Steenhoven, J. D. Janssen a and G. Vossers; Journal of Fluid Mechanics: 226; 445-474; 1991.
Other Products Cited: Pulsatile Flow Simulation SuperPump
Visit SourceD. K. Walker** and L. N. Scotten**; Medical and Biological Engineering and Computing: 29, Issue 5; 457-464; 1991. **ViVitro Labs Founder
Other Products Cited: Heart Valve Testing Pulse Duplicator
Visit SourceTeoh, S. H.; Lee, K. H.; Nugent, A. H.; Goh, K. S.; ASAIO Journal: 39, Issue 4; 1993.
To ascertain the stress magnitude at the stress concentration areas, in vitro strain measurements on a St. Vincent's mechanical heart valve were carried out in a pulse simulator.
Other Products Cited: Heart Valve Testing Pulse Duplicator
Visit SourceDavid K. Walker PhD**, Lawrence N. Scotten**: J Heart Valve Dis, Vol. 3 No. 5 Sep. 1994. **ViVitro Labs Founder
Other Products Cited: Heart Valve Testing Pulse Duplicator
Visit SourceOsamu Kawaguchi, MD, Yoichi Goto, MD, Shiho Futaki, MD, Yuichi Ohgoshi, MD, Hitoshi Yaku, MD, Hiroyuki Suga, MDa; The Journal of Thoracic and Cardiovascular Surgery: 107; 850-859; 1994.
The purpose of this study was to determine the role of ventricular size or contractility in the effectiveness of dynamic cardiac compression in terms of the pressure-volume relationship and myocardial oxygen consumption. In 10 isolated cross-circulated dog hearts, the ventricle was directly compressed during systole.
Other Products Cited: Ex ViVo Simulation SuperPump
Visit SourceMano J. Thubrikar, PhD, Francis Robicsek, MD, Brett L. Fowler, BS; The Journal of Thoracic and Cardiovascular Surgery: 107; 707-716; 1994.
Saphenous vein graft stenosis has become the leading cause of reoperation in coronary bypass operations. We investigated the role of vein valves in vein graft stenosis by studying 14 human saphenous veins placed in a simulator of the left side of the heart in parallel with the arterial system.
Other Products Cited: Pulsatile Flow Simulation Pulse Duplicator
Visit SourceM. Strüber, A. Campbell, G. Richard and J. Laas; European Journal of Cardio-Thoracic Surgery: 10, Issue 6; 422-427; 1996.
To determine the energy loss attributable to prosthetic valve size and design in double valve replacement, energy consumption of mitral valves (size #25 to #29), of two different designs (Bjork Shiley tilting disc and Carbomedics bileaflet valves), in combination with a small (#21) and large sized (#27) aortic prosthesis, were analyzed in a flow simulator.
Other Products Cited: Heart Valve Testing Pulse Duplicator
Visit SourceImportance of pressure recovery: Russell S. Heinrich, Arnold A. Fontaine, Randall Y. Grimes, Aniket Sidhaye, Serena Yan1, Kristin E. Moore, Robert A. Levine and Ajit P. Yoganathan; Annals of Biomedical Engineering: 24, Issue 6; 685-694; 1996.
Current methods for assessing the severity of aortic stenosis depend primarily on measures of maximum systolic pressure drop at the aortic valve orifice and related calculations such as valve area. It is becoming increasingly obvious, however, that the impact of the obstruction on the left ventricle is equally important in assessing its severity and could potentially be influenced by geometric factors of the valve, causing variable degrees of downstream pressure recovery...
Other Products Cited: Heart Valve Testing SuperPump
Visit SourceGeorge P. Chatzimavroudis, Peter G. Walker, John N. Oshinski, Robert H. Franch, Roderic I. Pettigrew and Ajit P. Yoganathan; Annals of Biomedical Engineering: 25, Issue 4; 644-652; 1997.
Although several methods have been used clinically to evaluate the severity of aortic regurgitation, there is no purely quantitative approach for aortic regurgitant volume (ARV) measurements. Magnetic resonance phase velocity mapping can be used to quantify the ARV, with a single imaging slice in the ascending aorta, from through-slice velocity measurements.
Other Products Cited: MRI compatibility SuperPump
Visit SourceOsamu Kawaguchi, MDa, Yoichi Goto, MDb, Yuichi Ohgoshi, MDb, Hitoshi Yaku, MDb, Mitsuya Murase, MDa, Hiroyuki Suga, MDc; The Journal of Thoracic and Cardiovascular Surgery: 113; 923-931; 1997.
Other Products Cited: Ex ViVo Simulation SuperPump
Visit SourceM L J Rose, G A Wright, T G Mackay, W Martin and D J Wheatley; Physiological Measurement: 18; 171-182; 1997.
Other Products Cited: Flow Visualization SuperPump
Visit SourceJ. M. Guccione, W. G. O’Dell, A. D. McCulloch and W. C. Hunter; American Journal of Physiology: 272; 1997.
Other Products Cited: Ex ViVo Simulation SuperPump
Visit SourceJT Baldwin, A Campbell, C Luck, W Ogilvie and J Sauter; Eur J Cardiothorac Surg 1997;11:287-292.
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Visit SourceRichard H. Marcus, MBBCh; Russell S. Heinrich, BSE; James Bednarz, BS; Stephen Lupovitch, MD; Joseph Abruzzo, MD; Raphael Borok, MBBCh; Byron Vandenberg, MD; Richard E. Kerber, MD; William Piccione, MD; Ajit P. Yoganathan, PhD; Roberto M. Lang, MD; American Heart Association: 98; 866-872; 1998.
Other Products Cited: Heart Valve Testing SuperPump
Visit SourceBradley D. Bolster, Jr, MSE, Ergin Atalar, PhD, Christopher J. Hardy, PhD, and Elliot R. McVeigh, PhD; Journal of Magnetic Resonance Imaging: 8, Issue 4; 878–888; 1998.
Other Products Cited: MRI compatibility SuperPump
Visit SourceJ. Michael Hasenkama, b, Steffen Ringgaardc, Kim Houlindb, René M. Botnard, Hans Stødkilde-Jørgensenc, Peter Boesigerd, Erik Morre Pedersena, b, c; European Journal of Cardio-Thoracic Surgery: 16; 300-305; 1999.
To evaluate the potential of magnetic resonance imaging (MRI) for evaluation of velocity fields downstream of prosthetic aortic valves. Furthermore, to provide comparative data from bileaflet aortic valve prostheses in vitro and in patients.
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Visit SourceSheng-Jing Dong, Paul S. Hees, Wen-Mei Huang, Sam A. Buffer Jr., James L. Weiss, and Edward P. Shapiro; American Journal of Physiology: 277; 1999.
Shortening of oblique left ventricular (LV) fibers results in torsion. A unique relationship between volume and torsion is therefore expected, and the effects of load and contractility on torsion should be predictable. However, volume-independent behavior of torsion has been observed, and the effects of load on this deformation remain controversial....
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Visit SourceA. A. Sakhaeimanesh; Y. S. Morsi; Journal of Medical Engineering & Technology: 23, Issue 2; 63 – 68; 1999.
Other Products Cited: Heart Valve Testing Pulse Duplicator
Visit SourceEdmond Rambod, Masoud Beizaie, Michael Shusser, Simcha Milo and Morteza Gharib; Annals of Biomedical Engineering: 27, Issue 6; 774-792; 1999.
This study was aimed at developing a physical model, supported by experimental observations, to describe the formation and growth of microbubbles seen in patients with mitral mechanical heart valves (MHV). This phenomenon, often referred to as high intensity transient signals (HITS), appears as bright, intense, high-velocity and persistent echoes detected by Doppler ultrasonography at the instant of closure.
Other Products Cited: Applications Flow Visualization Pulsatile Flow Simulation SuperPump
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