POREX® IV Catheter Vents are self-sealing vent components assembled into IV catheter devices. The IV catheter is a medical device that is inserted into a patient’s vein and serves a number of important functions: to obtain blood samples from patients, to introduce fluids such as sterile saline, or to administer drugs such as IV antibiotics. IV Catheter Vents contain a functional additive that immediately swells upon contact with fluids, including blood. This eliminates blood bypass in the “flashback chamber,” which protects healthcare workers from exposure to blood and bloodborne pathogens. The self-sealing catheter vents are optimized for desired airflow and pressure drop characteristics under venous pressure and are compatible with ethylene oxide (EtO) sterilization processes. They are specifically designed for high-volume, automated assembly processes.