Malposition of Blood Sampling Catheter in the Polystan Oxygenators D. Hjorth Hansen, F. S. Joyce, E. Bisgaard-Frantzen, K. M. Christensen, N. Boye and K. P. Szczepanski J Extra Corpor Technol, 13 3 (1981) 204-208 Published online: 29 September 2023 DOI: 10.1051/ject/1981133204