Filter lines

Filter systems play a crucial role in infusion therapy by filtering out potential foreign bodies and microorganisms in infusion solutions. More specifically, they serve to eliminate particles, retain bacteria and endotoxins, prevent air embolism, and act as an indicator for drug incompatibilities.

The total particle load of a 24-hour infusion is approximately 1,920,625 particles, highlighting the importance of filtration. Particle contamination can have various sources, including glass fragments, plastic debris, rubber, and undissolved drug particles.

A filter consists of a filter housing, a hydrophobic membrane that is impermeable to liquids but permeable to air, and a ventilation opening. Only dissolved substances can penetrate the hydrophilic membrane, while the hydrophobic membrane vents the filter, thus preventing air embolism. The air that enters escapes through the hydrophobic membrane, while the particles are retained by the hydrophilic membrane.