An in vitro assessment by means of laser Doppler velocimetry of the medtronic advantage bileaflet mechanical heart valve hinge flow Rahul Saxena, MS,

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Presentation transcript:

An in vitro assessment by means of laser Doppler velocimetry of the medtronic advantage bileaflet mechanical heart valve hinge flow Rahul Saxena, MS, Jack Lemmon, PhD, Jeffrey Ellis, PhD, Ajit Yoganathan, PhD The Journal of Thoracic and Cardiovascular Surgery Volume 126, Issue 1, Pages 90-98 (July 2003) DOI: 10.1016/S0022-5223(03)00581-6

Figure 1 Schematics of the Advantage (A) and SJM (B) valve hinge designs with appropriate nomenclature. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 90-98DOI: (10.1016/S0022-5223(03)00581-6)

Figure 2 Measurement planes with nomenclature for the Medtronic Advantage (A) and SJM (B) hinge designs. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 90-98DOI: (10.1016/S0022-5223(03)00581-6)

Figure 3 Velocity field at peak diastole (A) and peak systole (B) in the plane level with the primary flat at zero depth into the hinge for the Medtronic Advantage valve. The arrows point in the direction of mean velocity vectors and are color coded by velocity magnitude (in meters per second), as shown in the legend. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 90-98DOI: (10.1016/S0022-5223(03)00581-6)

Figure 4 Velocity fields of the Advantage valve at one-third (A) and two-thirds (B) depth into the hinge recess, exhibiting similar flow patterns at the 2 levels with maximum velocities of 1.64 and 1.80 m/s, respectively. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 90-98DOI: (10.1016/S0022-5223(03)00581-6)

Figure 5 Velocity field at peak diastole (A) and peak systole (B) in the plane level with the primary flat at zero depth into the hinge of the SJM valve. The arrows point in the direction of mean velocity vectors and are color coded by velocity magnitude (in meters per second), as shown in the legend. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 90-98DOI: (10.1016/S0022-5223(03)00581-6)

Figure 6 Velocity fields of the SJM valve at one-third (A) and two-thirds (B) depth into the hinge recess, showing similar flow patterns for the 2 planes with maximum velocities of 1.57 and 2.08 m/s, respectively. The Journal of Thoracic and Cardiovascular Surgery 2003 126, 90-98DOI: (10.1016/S0022-5223(03)00581-6)