Evaluation of the Hemochron 8000 Rx/Dx System for Heparin Management Howard D. Johnson, Marc S. Morgan, Gary R. Koenig, Joe R. Utley, Steven A. Leyland, Thomas B. Whittle and John M. Conn J Extra Corpor Technol, 29 2 (1997) 83-87 Published online: 18 August 2023 DOI: 10.1051/ject/199729283