Monitoring: Equipment and Computers
Background and Goal of Study: Supplemental peri-operative oxygen administration increases subcutaneous tissue oxygenation. The exact correlation over time between tissue oxygenation and FiO2 is unknown. Consequently we evaluated subcutaneous tissue oxygen tension of the upper arm (PsqO2) and of the wound (PwO2) in relation to inspired oxygen concentrations (FiO2).
Materials and Methods: So far we have evaluated data in two patients (A, B). Intraoperatively PsqO2 was measured, whereas postoperatively PsqO2 and PwO2 in the subcutaneous tissue adjacent to the surgical wound were obtained. Additionally we recorded hemodynamic and respiratory data (e.g. CO, FiO2). All data were recorded online.
Results: Our preliminary results show that there is a close relationship over time between PsqO2 and FiO2. Furthermore tissue oxygenation at the wound is well reflected by subcutaneous tissue oxygenation in the upper arm.
Conclusion: Inspired oxygen concentration is an important factor of subcutaneous tissue oxygenation. With our data we can show the real time dynamic dependency of PsqO2 on FiO2.