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Figure 4 | Critical Care

Figure 4

From: Dual-lumen catheters for continuous venovenous hemofiltration: limits for blood delivery via femoral vein access and a potential alternative in an experimental setting in anesthetized pigs

Figure 4

Linear regression analysis for the dependency of pressure of access flow (PQa) and venous pressure (Pv) on blood flow (Qb). All data obtained during continuous venovenous hemofiltration within each study group were summarized for regression analysis independent of the time point or the protocol. For the linear regression analysis of the dependency of Pv on Qb, it has to be considered that the venous line of the dual-lumen catheter was used for blood return in both catheter groups throughout the whole time course of the protocol. However, there was an important difference for Pv level development between the groups. In the alternative catheter group, access flow (Qa) was performed via a contralateral vein as compared to blood return, whereas in the dual-lumen group, only a specific distance between the holes for blood return and the holes for blood delivery separated flow dynamics at the catheter tip for Qa from blood return.

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Critical Care

ISSN: 1364-8535