Nominal size in six bileaflet mechanical aortic valves: a comparison of orifice size and biologic equivalence John B Chambers, MD, FACC, Lionel Oo, FRCS,

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Presentation transcript:

Nominal size in six bileaflet mechanical aortic valves: a comparison of orifice size and biologic equivalence John B Chambers, MD, FACC, Lionel Oo, FRCS, Andrew Narracott, PhD, Pat M Lawford, PhD, Christopher I Blauth, MS, FRCS The Journal of Thoracic and Cardiovascular Surgery Volume 125, Issue 6, Pages 1388-1393 (June 2003) DOI: 10.1016/S0022-5223(03)00039-4

Figure 1 Method of measuring internal diameter. Digitized image of inflow surface of Carbomedics standard valve with internal diameter as used in calibration procedures. The Journal of Thoracic and Cardiovascular Surgery 2003 125, 1388-1393DOI: (10.1016/S0022-5223(03)00039-4)

Figure 2 Diagrams of bileaflet mechanical valves. Intra-annular valve (eg, Carbomedics standard or St Jude Medical standard) as implanted in patient (A) and as inserted into annulus machined in polypropylene block (B). Supra-annular valve with component of housing designed to fit within annulus (eg, Medical Carbon Research Institute On-X and St Jude Medical EHP) as implanted in patient (C) and as inserted into annulus machined in polypropylene block (D). Supra-annular valve with no intra-annular component (eg, Carbomedics Top Hat) as implanted in patient (E) and as inserted into annulus machined in polypropylene block (F). The Journal of Thoracic and Cardiovascular Surgery 2003 125, 1388-1393DOI: (10.1016/S0022-5223(03)00039-4)

Figure 3 Internal diameter in relation to nominal size for six designs of bileaflet mechanical valve. CM, Sulzer Carbomedics; Std, standard; R, reduced cuff; TH, supra-annular Top Hat. The Journal of Thoracic and Cardiovascular Surgery 2003 125, 1388-1393DOI: (10.1016/S0022-5223(03)00039-4)