Development of an Implantable Ventricular Assist System

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Presentation transcript:

Development of an Implantable Ventricular Assist System Michael P Macris, MD, Steven M Parnis, O.H Frazier, MD, John M Fuqua, Robert K Jarvik, MD The Annals of Thoracic Surgery Volume 63, Issue 2, Pages 367-370 (February 1997) DOI: 10.1016/S0003-4975(96)01226-X

Fig. 1 Jarvik 2000 axial-flow blood pump. The Annals of Thoracic Surgery 1997 63, 367-370DOI: (10.1016/S0003-4975(96)01226-X)

Fig. 2 In vitro flow/pressure curves with the Jarvik 2000 blood pump. The pump was tested in a 3.3 centistoke glycerol/water mixture under steady-state flow conditions. The pump achieved speeds as high as 13,000 rpm, which can generate more than 11 L/min. (AoP = aortic pressure; LVP = left ventricular pressure.) The Annals of Thoracic Surgery 1997 63, 367-370DOI: (10.1016/S0003-4975(96)01226-X)

Fig. 3 Jarvik 2000 axial-flow blood pump in place within the left ventricular apex. The Annals of Thoracic Surgery 1997 63, 367-370DOI: (10.1016/S0003-4975(96)01226-X)

Fig. 4 Power and speed remained constant during a 5-month study in calf 4. The Annals of Thoracic Surgery 1997 63, 367-370DOI: (10.1016/S0003-4975(96)01226-X)

Fig. 5 Minimum and maximum current levels in calf 4. The change in amperage occurs as the torque load in the motor varies with the pulse pressure caused by ventricular contraction. The Annals of Thoracic Surgery 1997 63, 367-370DOI: (10.1016/S0003-4975(96)01226-X)