[Current techniques for extracorporeal decarboxylation]

Area of Science:

• Critical Care Medicine
• Respiratory Physiology
• Cardiopulmonary Support

Background:

• Extracorporeal lung assist (ECLA) has led to diverse decarboxylation systems.
• Low extracorporeal blood flows enable effective CO2 removal with reduced invasiveness.
• Emerging therapies utilize renal replacement platforms for respiratory support ('respiratory dialysis').

Purpose of the Study:

• To review the current landscape of extracorporeal CO2 elimination (ECCO2R) systems.
• To discuss the application of ECCO2R in managing acute respiratory failure and ARDS.
• To evaluate the clinical evidence and current recommendations for ECCO2R use.

Main Methods:

• Review of clinical practice and emerging technologies in ECCO2R.
• Analysis of system capabilities for CO2 transport and respiratory acidosis control.
• Evaluation of studies investigating ECCO2R's impact on ventilator-induced lung injury (VILI) and clinical outcomes.

Main Results:

• Low-flow ECCO2R systems effectively eliminate CO2, aiding in respiratory acidosis management and enabling protective ventilation.
• ECCO2R has demonstrated a reduction in ventilator-induced lung injury (VILI).
• Positive effects on hard clinical endpoints like mortality and duration of mechanical ventilation are not yet proven.

Conclusions:

• ECCO2R, particularly low-flow systems, shows promise in managing acute lung failure and facilitating lung-protective ventilation.
• Despite reducing VILI, the clinical benefits of ECCO2R on mortality and ventilation duration require further investigation.
• Given the limited evidence, ECCO2R should be considered experimental and used only in experienced centers.