Development of a new arterial-line filter design using computational fluid dynamics analysis.

Area of Science:

• Biomedical Engineering
• Cardiovascular Surgery

Background:

• Arterial-line filters are crucial for air separation during extracorporeal circulation.
• Existing filters face challenges in completely preventing air embolism during cardiac surgery.
• Improvements in filtration technology are necessary for cardiopulmonary bypass procedures.

Purpose of the Study:

• To review micropore filter technology principles.
• To develop a novel arterial-line filter concept using computational fluid dynamics (CFD).
• To optimize filter design for reduced priming volume and screen surface area.

Main Methods:

• Theoretical review of micropore filter technology.
• Development of a new filter design using CFD analysis.
• Utilized manufacturer data and ex vivo circuit results for numerical modeling.
• Analyzed flow patterns, pressure, and velocity profiles to refine the design.

Main Results:

• CFD analysis informed refinements for optimal filter geometry.
• Achieved initial design goals of ≤225 mL priming volume and ≤500 cm² screen surface area.
• Predicted optimal design: 56-degree screen angle, 293.9 cm² surface area, 192.4 mL priming volume.

Conclusions:

• CFD modeling is valuable for advancing arterial-line filter design.
• The developed filter concept shows promise for enhanced air removal during cardiopulmonary bypass.
• The study supports the use of numerical modeling in developing improved medical devices.