What is chattering in ECMO practice?

Chattering in ECMO practice specifically refers to the phenomenon where there is a collapse of a vein around the venous cannula. This occurs when there is negative pressure created by the pump that overcomes the pressure in the surrounding venous system, leading to collapse and intermittent loss of blood return to the ECMO circuit.

Such collapse can significantly impair the efficiency of the ECMO system, causing fluctuations in flow and impacting overall patient outcomes. Proper cannula sizing and placement, as well as maintaining appropriate flow rates are essential to prevent this issue. Understanding this mechanical aspect is crucial for ECMO practitioners to ensure continuous and stable support for their patients.