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Backwash Maneuver for HeartMate3 Inflow Thrombosis: Experience From Two Cases
Nikolaos Cholevas1, Christoph Hoermandinger1, Isabell Anna Just1,2
1From the Department of Cardiothoracic and Vascular Surgery, German Heart Center of the Charité, Berlin, Germany.
ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|June 19, 2024
Summary
The backwash maneuver, effective for HeartWare HVAD devices, failed to treat inflow thrombosis in two HeartMate3 patients. This suggests mechanical differences may limit this approach for HeartMate3 pump thrombosis.
Area of Science:
- Cardiology
- Biomedical Engineering
Background:
- Ingested pump inflow thrombus is a rare but serious complication of left ventricular assist devices (LVADs).
- The backwash maneuver has emerged as a successful alternative to pump replacement for inflow thrombosis in HeartWare HVAD devices.
Purpose of the Study:
- To evaluate the efficacy of the backwash maneuver for treating ingested pump inflow thrombus in HeartMate3 LVAD patients.
- To investigate potential reasons for treatment failure in HeartMate3 devices.
Main Methods:
- Case report detailing the application of the backwash maneuver in two patients with HeartMate3 LVADs and inflow thrombosis.
- Analysis of mechanical factors potentially influencing the backwash maneuver's success.
Main Results:
- The backwash maneuver was unsuccessful in removing the thrombus in both HeartMate3 patients.
- Thrombus washout was not feasible, potentially due to the specific mechanical design of the HeartMate3 pump's inflow component.
Conclusions:
- The backwash maneuver may not be a suitable treatment for inflow thrombosis in HeartMate3 devices.
- Further investigation is needed to understand the mechanical limitations of the HeartMate3 pump regarding thrombus management.
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