Sterifix 0.2 Micron Injection Filter

Product Overview

The Sterifix® 0.2 µm Injection Filter is a terminal filter used between a prefilled syringe or infusion set and the patient's IV access to remove particulate matter, inadvertent glass shards from ampoule opening, microbial contamination and in-line air. The 0.2 µm pore-size hydrophilic membrane is validated for sterile filtration per ASTM F838-20 and retains bacterial loads of Brevundimonas diminuta and common Gram-positive and Gram-negative organisms. A parallel hydrophobic vent releases entrained air, supporting safe administration of bolus injections and slow IV pushes without priming interruption.

Clinical use of 0.2 µm terminal filters is supported by the Infusion Nurses Society (INS) Standards of Practice, the INS Position Paper on In-line Filtration, ESPEN guidelines on parenteral nutrition in neonates, and the ASHP/ASPEN Parenteral Nutrition Safety Consensus Recommendations, each of which recommends or strongly recommends terminal filtration for specific patient populations and drug classes.

Specifications

Clinical Indications

• Terminal filtration of 2-in-1 parenteral nutrition admixtures (lipid-free) per ASHP/ASPEN 2014 Safety Consensus Recommendations and INS Standards
• Filtration of injectable drug solutions reconstituted from ampoules where glass particulate contamination is documented
• IV medication administration in neonatal and paediatric populations, where circulating particle burden has clinical consequence (ESPEN, BAPEN guidance)
• Oncology administration of drugs with defined particulate specifications (check individual cytotoxic drug compatibility before use)
• Critical care IV administration where in-line filtration is recommended to reduce systemic inflammatory response in long-stay ICU patients (RCT evidence, Jack et al. 2012)
• Elimination of inadvertent air bubbles in gravity-fed administration via the hydrophobic vent

Frequently Asked Questions

Q: What is the clinical rationale for using a 0.2 µm rather than a 1.2 µm in-line filter?
A: A 0.2 µm filter provides sterile filtration and retains bacteria, endotoxin aggregates, microparticulates and precipitates in aqueous, non-lipid admixtures such as 2-in-1 parenteral nutrition, crystalloid solutions and reconstituted drugs. A 1.2 µm filter is required for lipid-containing 3-in-1 TPN because 0.2 µm membranes will block lipid droplets. Select based on the fluid composition: 0.2 µm for aqueous, 1.2 µm for lipid emulsions.

Q: Are there drug compatibility considerations I must review before terminal filtration?
A: Yes. Certain drugs bind to polyethersulfone or polyamide membranes or are delivered as colloidal preparations that cannot be filtered at 0.2 µm (e.g. lipid emulsions, liposomal amphotericin, some monoclonal antibodies, amiodarone in some formulations). Always verify against the drug's Summary of Product Characteristics or consult the pharmacy pharmacokinetics team prior to in-line filter use.

Q: How often should the Sterifix filter be changed during continuous infusion?
A: INS Standards of Practice recommend changing in-line filters in accordance with the administration set - typically every 24 hours for non-lipid infusions and every 24 hours for 3-in-1 TPN, or immediately if precipitate or membrane discolouration is observed, or if the infusion rate falls unexpectedly indicating filter occlusion.

Q: Does terminal filtration slow infusion rate significantly?
A: A 0.2 µm filter produces a small back-pressure that is clinically insignificant for gravity and volumetric pump infusions at standard rates. Confirm compatibility with high-rate bolus or pressure-infusion scenarios against the filter's rated maximum pressure in the B. Braun data sheet.

Q: Is the Sterifix filter HSA-registered and available for Singapore hospital procurement?
A: Yes. Sterifix® is listed under B. Braun's Singapore HSA Medical Device Register entry as a Class IIa device. EMIS is a Singapore-registered distributor and supplies the Sterifix range through public hospital group purchasing, private hospital pharmacy procurement, community nursing and specialty paediatric and neonatal services.