TY - JOUR
T1 - Static analysis of annuloplasty rings sutured on an annulus model of the mitral valve
T2 - Comparison between the Duran ring and the Carpentier Classic ring
AU - Arita, Makoto
AU - Kasegawa, Hitoshi
AU - Umezu, Mitsuo
PY - 2004
Y1 - 2004
N2 - A novel in vitro evaluation system was developed to study the performance of newly developed and conventional annuloplasty rings. Using this system, a comparative study between the Duran flexible ring and the Carpentier Classic (rigid) ring was conducted with the aim of achieving a better understanding of these devices and of providing surgeons with better criteria for selecting the most appropriate annuloplasty ring. It was possible to obtain quantitative data using a microscope and a load cell to measure valve orifice area and tensile load on the valve annulus, respectively. Among the results were the findings that the orifice area of the rigid ring was smaller by 12.0% than that of the flexible ring and that in both rings the load was greater in the posterior region than in the anterior region. Further analysis using a beam model demonstrated that the stress applied to the sutures of the rigid ring is higher than that for the flexible ring in terms of shearing force and bending moment of the ring. This pilot study yielded several important findings: the ability of a ring to maintain valve orifice area is observable; larger loads are applied to the posterior annulus than to the anterior annulus; and it is possible to clarify and compare the characteristics of various types of annuloplasty rings.
AB - A novel in vitro evaluation system was developed to study the performance of newly developed and conventional annuloplasty rings. Using this system, a comparative study between the Duran flexible ring and the Carpentier Classic (rigid) ring was conducted with the aim of achieving a better understanding of these devices and of providing surgeons with better criteria for selecting the most appropriate annuloplasty ring. It was possible to obtain quantitative data using a microscope and a load cell to measure valve orifice area and tensile load on the valve annulus, respectively. Among the results were the findings that the orifice area of the rigid ring was smaller by 12.0% than that of the flexible ring and that in both rings the load was greater in the posterior region than in the anterior region. Further analysis using a beam model demonstrated that the stress applied to the sutures of the rigid ring is higher than that for the flexible ring in terms of shearing force and bending moment of the ring. This pilot study yielded several important findings: the ability of a ring to maintain valve orifice area is observable; larger loads are applied to the posterior annulus than to the anterior annulus; and it is possible to clarify and compare the characteristics of various types of annuloplasty rings.
KW - Carpentier ring
KW - Duran ring
KW - In vitro evaluation system
KW - Load on the annulus
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U2 - 10.1007/s10047-003-0245-5
DO - 10.1007/s10047-003-0245-5
M3 - Article
C2 - 15083342
AN - SCOPUS:1842686568
VL - 7
SP - 30
EP - 36
JO - Journal of Artificial Organs
JF - Journal of Artificial Organs
SN - 1434-7229
IS - 1
ER -