Performance of a 3-Bladed Propeller Pump to Provide Cavopulmonary Assist in the Failing Fontan Circulation Amy L. Throckmorton, PhD, Kimberly K. Ballman,

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Presentation transcript:

Performance of a 3-Bladed Propeller Pump to Provide Cavopulmonary Assist in the Failing Fontan Circulation Amy L. Throckmorton, PhD, Kimberly K. Ballman, BA, Cynthia D. Myers, MD, Steven H. Frankel, PhD, John W. Brown, MD, Mark D. Rodefeld, MD The Annals of Thoracic Surgery Volume 86, Issue 4, Pages 1343-1347 (October 2008) DOI: 10.1016/j.athoracsur.2008.06.026 Copyright © 2008 The Society of Thoracic Surgeons Terms and Conditions

Fig 1 (Top) Plastic propeller prototype. (Bottom) Shows size. The Annals of Thoracic Surgery 2008 86, 1343-1347DOI: (10.1016/j.athoracsur.2008.06.026) Copyright © 2008 The Society of Thoracic Surgeons Terms and Conditions

Fig 2 Hydraulic performance. (Exp = experiment number; CFD = computational predictions; LPM = liters per minute.) The Annals of Thoracic Surgery 2008 86, 1343-1347DOI: (10.1016/j.athoracsur.2008.06.026) Copyright © 2008 The Society of Thoracic Surgeons Terms and Conditions

Fig 3 Rotational speed, flow rate, and temperature. (Exp = experiment number; LPM = liters per minute.) The Annals of Thoracic Surgery 2008 86, 1343-1347DOI: (10.1016/j.athoracsur.2008.06.026) Copyright © 2008 The Society of Thoracic Surgeons Terms and Conditions

Fig 4 Hematocrit during blood bag experiments. (Exp = experiment number.) The Annals of Thoracic Surgery 2008 86, 1343-1347DOI: (10.1016/j.athoracsur.2008.06.026) Copyright © 2008 The Society of Thoracic Surgeons Terms and Conditions

Fig 5 Plasma free hemoglobin (left) and normalized index of hemolysis (NIH) (right) during blood bag experiments. (Exp = experiment number.) The Annals of Thoracic Surgery 2008 86, 1343-1347DOI: (10.1016/j.athoracsur.2008.06.026) Copyright © 2008 The Society of Thoracic Surgeons Terms and Conditions

Fig 6 Propeller pump versus microaxial flow pump. (Top) A folding propeller pump occupies minimal vessel cross-sectional area and is not obstructive. Flow is noncompressive across the entire vessel lumen. The vessel wall serves as the “housing” for the pump. (Bottom) Micro-axial pumps require an occlusive mechanism to prevent recirculation around the pump (balloon illustrated). Combined with the pump, this is obstructive to flow in the event of device failure. Flow rate is inherently higher in the inflow and outflow regions to deliver equivalent volume. There is significant potential for flow stasis. The Annals of Thoracic Surgery 2008 86, 1343-1347DOI: (10.1016/j.athoracsur.2008.06.026) Copyright © 2008 The Society of Thoracic Surgeons Terms and Conditions