Measures to control blood activation during assisted circulation

Area of Science:

• Biomaterials Science
• Cardiovascular Engineering
• Hematology

Background:

• Mechanical circulatory support (MCS) devices have advanced, enabling prolonged patient support.
• Blood contact with artificial biomaterials and other factors trigger inflammatory and hemostatic responses.
• Prolonged MCS induces systemic inflammation and blood activation similar to cardiopulmonary bypass.

Purpose of the Study:

• To explore the complex influence of time on blood activation during prolonged mechanical circulatory support.
• To review methods for reducing blood activation in patients undergoing long-term circulatory assistance.
• To identify strategies for improving device biocompatibility and managing blood activation.

Main Methods:

• Review of existing literature on blood activation during mechanical circulatory support and cardiopulmonary bypass.
• Analysis of biomaterial surface modifications and biologic cascade inhibition as methods to reduce blood activation.
• Evaluation of strategies for controlling the endpoints of biologic cascades involved in blood activation.

Main Results:

• Prolonged mechanical circulatory support causes systemic inflammation and hemostatic changes.
• The influence of time on blood activation during prolonged support is complex and not fully understood.
• Interventions are limited to the device interface due to the need to preserve systemic patient integrity.

Conclusions:

• Reducing blood activation during prolonged mechanical circulatory support is crucial for patient outcomes.
• Improving biomaterial biocompatibility and localized interventions are key strategies.
• Further research is needed to fully understand and mitigate the time-dependent effects of MCS on blood activation.