Siting Central Venous Catheters Precisely While Performing the Access Procedure

For central venous catheters (CVC) to function properly, optimal tip location is of utmost importance.One technique to verify CVC position is the ECG method. Nowadays, the ECG method is applied using the maximum P-wave amplitude (P-max).The hypothesis is that a method believed to be precise in assessing CVC position can provide the same results for CVC tip positions regardless of their respective insertion sites.Can the ECG method (at P-max) provide the same results for the position of CVC tips regardless of their insertion site?

Inclusion Criteria:Critically ill patients in severe multiple organ dysfunction in need for a second CVC (e.g. for blood purification technique)Exclusion Criteria:Patient selection not fulfilled a/o no need for a second CVC