After documenting the characteristics of participants, cannulation site, and the cause for ECMO support, transcutaneous, arterial, venous, as well as end-tidal carbon dioxide partial pressure values are measured simultaneously at steady state conditions and compared with each other at various time points over a four-hour observation period. In addition, oxygen tensions are registered transcutaneously and in arterial and venous blood while respirator settings, sweep gas flow, ECMO flow, body temperature, volume status, and the dosage of vasopressors are also being recorded.

