PURPOSE: An in vitro study using explanted porcine hearts was conducted to evaluate a novel annuloplasty band, reinforced with a two-phase, shape memory alloy, designed specifically for minimally invasive mitral valve repair. DESCRIPTION: In its rigid (austenitic) phase, this band provides the same mechanical properties as the commercial semi-rigid bands. In its compliant (martensitic) phase, this band is flexible enough to be introduced through an 8-mm trocar and is easily manipulated within the heart. EVALUATION: In its rigid phase, the prototype band displayed similar mechanical properties to commercially available semi-rigid rings. Dynamic flow testing demonstrated no statistical differences in the reduction of mitral valve regurgitation. In its flexible phase, the band was easily deployed through an 8-mm trocar, robotically manipulated and sutured into place. CONCLUSIONS: Experimental results suggest that the shape memory alloy reinforced band could be a viable alternative to flexible and semi-rigid bands in minimally invasive mitral valve repair.
PURPOSE: An in vitro study using explanted porcine hearts was conducted to evaluate a novel annuloplasty band, reinforced with a two-phase, shape memory alloy, designed specifically for minimally invasive mitral valve repair. DESCRIPTION: In its rigid (austenitic) phase, this band provides the same mechanical properties as the commercial semi-rigid bands. In its compliant (martensitic) phase, this band is flexible enough to be introduced through an 8-mm trocar and is easily manipulated within the heart. EVALUATION: In its rigid phase, the prototype band displayed similar mechanical properties to commercially available semi-rigid rings. Dynamic flow testing demonstrated no statistical differences in the reduction of mitral valve regurgitation. In its flexible phase, the band was easily deployed through an 8-mm trocar, robotically manipulated and sutured into place. CONCLUSIONS: Experimental results suggest that the shape memory alloy reinforced band could be a viable alternative to flexible and semi-rigid bands in minimally invasive mitral valve repair.
Authors: P Dagum; T Timek; G R Green; G T Daughters; D Liang; N B Ingels; D C Miller Journal: J Thorac Cardiovasc Surg Date: 2001-10 Impact factor: 5.209
Authors: Ram Sharony; Paul C Saunders; Ambika Nayar; Eileen McAleer; Aubrey C Galloway; Julie Delianides; Charles F Schwartz; Robert M Applebaum; Itzhak Kronzon; Stephen B Colvin; Eugene A Grossi Journal: Ann Thorac Surg Date: 2004-02 Impact factor: 4.330
Authors: A F Carpentier; A Lessana; J Y Relland; E Belli; S Mihaileanu; A J Berrebi; E Palsky; D F Loulmet Journal: Ann Thorac Surg Date: 1995-11 Impact factor: 4.330
Authors: Molly F Purser; Andrew L Richards; Richard C Cook; Jason A Osborne; Denis R Cormier; Gregory D Buckner Journal: Ann Biomed Eng Date: 2010-07-23 Impact factor: 3.934