The engineer and the clinician: Understanding the work output and troubleshooting of the HeartMate II rotary flow pump W. Scott Arnold, MD, Kevin Bourque,

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Presentation transcript:

The engineer and the clinician: Understanding the work output and troubleshooting of the HeartMate II rotary flow pump W. Scott Arnold, MD, Kevin Bourque, MSME The Journal of Thoracic and Cardiovascular Surgery Volume 145, Issue 1, Pages 32-36 (January 2013) DOI: 10.1016/j.jtcvs.2012.07.113 Copyright © 2013 The American Association for Thoracic Surgery Terms and Conditions

Figure 1 Cardiac pressure-volume loop. EDPVR, End-diastolic pressure-volume relationship; EDV, end-diastolic volume; ESPVR, end-systolic pressure-volume relationship; ESV, end-systolic volume; LVP, left ventricular pressure; LVV, left ventricular volume; SV, stroke volume. The Journal of Thoracic and Cardiovascular Surgery 2013 145, 32-36DOI: (10.1016/j.jtcvs.2012.07.113) Copyright © 2013 The American Association for Thoracic Surgery Terms and Conditions

Figure 2 Outflow clamp crossclamped. The Journal of Thoracic and Cardiovascular Surgery 2013 145, 32-36DOI: (10.1016/j.jtcvs.2012.07.113) Copyright © 2013 The American Association for Thoracic Surgery Terms and Conditions

Figure 3 Centrifugal pump circuit diagram for Pentair Intellifo variable speed pump, with continuous power consumption displayed in Watts. The Journal of Thoracic and Cardiovascular Surgery 2013 145, 32-36DOI: (10.1016/j.jtcvs.2012.07.113) Copyright © 2013 The American Association for Thoracic Surgery Terms and Conditions

Figure 4 Derivation of pulsatility index (PI). The Journal of Thoracic and Cardiovascular Surgery 2013 145, 32-36DOI: (10.1016/j.jtcvs.2012.07.113) Copyright © 2013 The American Association for Thoracic Surgery Terms and Conditions

Figure 5 Clinical scenarios and associated device/hemodynamic changes. BP, Blood pressure; PI, pulsatility index; LV, left ventricle. The Journal of Thoracic and Cardiovascular Surgery 2013 145, 32-36DOI: (10.1016/j.jtcvs.2012.07.113) Copyright © 2013 The American Association for Thoracic Surgery Terms and Conditions

Figure 6 Heartmate II (Thoratec, Pleasanton, Calif) troubleshooting chart. LV, Left ventricular. The Journal of Thoracic and Cardiovascular Surgery 2013 145, 32-36DOI: (10.1016/j.jtcvs.2012.07.113) Copyright © 2013 The American Association for Thoracic Surgery Terms and Conditions