Trileaflet valve

R. Kiraly, R. Yozu, D. Hillegass, H. Harasaki, S. Murabayashi, J. Snow, Y. Nose, Hexsyn trileaflet valve—application to temporary blood pumps, Artif. Organs 6 (1982) 190-197. 

Duan, B., Kapetanovic, E., Hockaday, L.A., Butcher, J.T., 2014. Three-dimensional printed trileaflet valve conduits using biological hydrogels and human valve interstitial cells. Acta Biomater. 10, 1836—1846. 

Sodian R, Hoerstrup SP, Sperling JS, Daebritz S, Martin DP, Moran AM, Kim BS, Schoen FJ, Vacanti JP, and Mayer JE. Early In. vivo experience with tissue-engineered trileaflet heart valves. Circulation, 2000, 102(111), 22-29. 

Survey and its incidence continues to increase along with the growth of elderly population in Western societies (2). Aortic stenosis mostly occurs due to calcific degeneration of a normal trileaflet and less frequently in the setting of a congenital bicuspid valve. While still common in some parts of the world, rheumatic valve disease is now a rare cause in developed countries. 

Chandran, K.B., Fatemi, R., Schoephoerster, R., Wurzel, D., Hansen, G., Pantalos, G., Yu, L.-S., and Kolff, W.J. 1989a. In vitro comparison of velocity profiles and turbulent shear distal to polyurethane trileaflet and pericardial prosthetic valves. Artif Organs 13 148-154. 

Chandran, K.B., Kim, S.-H., and Han, G. 1991a. Stress distribution on the cusps of a polyurethane trileaflet heart valve prosthesis in the closed position. J. Biomech. 24 385-395. 

Lapeyre, D.M., Frazier, O.H., and Conger, J.L. 1994. In vivo evaluation of a trileaflet mechanical heart valve. ASAIO J. 40 M707-M713. 

I. Gallo, In vivo experimental assessment of polytetrafluoroethyl-ene trileaflet heart valve prosthesis, J. Thorac. Cardiovasc. Surg. 99 (1990) 1074-1081. 

Corden, J., David, T., Fisher, J. Determination of the curvatures and bending strains in open trileaflet heart valves. Proc. Inst. Mech. Eng. H. 209(2), 121-128 (1995)... 

Work has been done on fibrous stmctores for aortic valve substitutes, dealing with loose and tight structures to ensure low blood permeability and resistance to high blood pressure gradient [34]. Performance of polyester woven fabrics has been studied by F. Heim for a trileaflets cardiac valve prosthesis (Fig. 13.11), to withstand principal stresses that are distributed in circumferential and longitudinal directions of the loaded leaflets [35]. 

GaUocher SL. Durability assessment of polymer trileaflet heart valves. January 1, 2007 [FIU electronic theses and dissertations], http //digitalcommons.fiu.edu/dissertations/ AAI3299201. 

Kaufmann T, Linde T, Cuenca-Navalon E, Schmitz C, Hormes M, Schmitz-Rode T, et al. Transient, three-dimensional flow field simulation through a mechanical, trileaflet heart valve prosthesis. ASAIO J 2011 57(4) 278-82. 

PEUs were used since they have excellent hydrolytic stabihty. In the 1980s two types of trileaflet PUR valves made of Biomer (Ethicon) and Lycra Spandex (DuPont) were developed. The Lycra valves showed low regurgitation in vitro, and lasted for one year or more in large animal models, but calcification and thrombosis became evident in growing sheep (Wisman et al., 1982). Calcification was also seen with Biomer valves in juvenile sheep (Hilbert et al., 1987). 

Hilbert, S.L., Ferrans, V.J., Tomita, Y, Eidbo, E.E., Jones, M., 1987. Evaluation of explanted polyurethane trileaflet cardiac valve prostheses. Journal of Thoracic and Cardiovascular Surgery 94, 419 29. 

Wisman, C.B., Pierce, W.S., Donachy, J.H., Pae, W.E., Myers, J.L., Prophet, G.A., 1982. A polyurethane trileaflet cardiac valve prosthesis in vitro and in vivo studies. Transactions -American Society for Artificial Internal Organs 28, 164-168. 

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