Using Daily Plasma-Free Hemoglobin Levels for Diagnosis of Critical Pump Thrombus in Patients Undergoing ECMO or VAD SupportJames R. Neal, Eduard Quintana, Roxann B. Pike, James D. Hoyer, Lyle D. Joyce and Gregory SchearsJ Extra Corpor Technol, 47 2 (2015) 103-108DOI: https://doi.org/10.1051/ject/201547103