Dräger microfilter 6737545 Used Patient Monitor designed for Core Technical Functions

Dräger microfilter 6737545 Used Patient Monitor designed for Core Technical Functions serves as a critical barrier in respiratory protection systems. Its multi-layered composite structure integrates.

PRODUCT PICTURE:

 medical-grade hydrophobic polytetrafluoroethylene (PTFE) microporous membrane as the primary filtration medium. This material undergoes an electret treatment process, imparting permanent electrostatic charges to the fiber surfaces. This dual mechanism enables:

Physical interception of particles >0.2 μm (including bacteria, viral droplets, and aerosols) via size exclusion;

Electrostatic adsorption of sub-micron particles (e.g., SARS-CoV-2 virions at 0.1 μm), achieving filtration efficiency ≥99.99% in compliance with ISO 23328-1:2020 standards.

Bidirectional Protection Technology
■ Patient-to-Equipment Protection:
During exhalation, pathogen-laden gases (containing organisms like Mycobacterium tuberculosis or influenza viruses) pass through a gradient density filter architecture:

A pre-filtration layer captures large particulates (>5 μm) such as respiratory secretions.

The PTFE membrane traps microorganisms, preventing contamination of anesthesia machine internals (e.g., flow sensors, gas pathways, vaporizers).
This significantly reduces cross-infection risks in ventilator sharing scenarios.

■ Equipment-to-Patient Protection:
The filter blocks pathogens colonizing ventilator internals (e.g., Pseudomonas aeruginosa) and airborne contaminants (OR particulates, fungal spores) from entering the patient's airway. Clinical studies demonstrate a 41% reduction in Ventilator-Associated Pneumonia (VAP) incidence when using ISO-certified filters.

Advanced Fluid Dynamics Design
Computational Fluid Dynamics (CFD) modeling optimizes airflow pathways to minimize resistance:

Peak flow resistance: ≤2.5 mbar at 300 L/min (35% lower than industry average).

Laminar flow channels maintain stable pressure delivery even during high-frequency oscillation ventilation (HFOV).
This low-resistance profile prevents respiratory muscle fatigue in compromised patients (COPD, ARDS) during prolonged mechanical ventilation.

Material Science Innovations
■ Hydrophobic Stability:
The PTFE membrane maintains structural integrity at 100% relative humidity without pore collapse, ensuring consistent filtration during humidified ventilation.

■ Dead Space Optimization:
Precision-molded polycarbonate housing limits internal volume to <15 ml, minimizing CO₂ rebreathing risk—critical for pediatric/neonatal applications where dead space >2 ml/kg can compromise gas exchange.

■ Chemical Compatibility:
Resists degradation by common disinfectants (ethanol, isopropanol) and anesthetic gases (sevoflurane, desflurane) per ASTM F2100 testing.

Performance Validation

Bacterial Filtration Efficiency (BFE): 99.999% against Staphylococcus aureus (3.0 μm)

Viral Filtration Efficiency (VFE): 99.99% against MS2 bacteriophage (0.025 μm)

Particulate Filtration: Meets EN 14387 P3 level (penetration <0.05%)

Pressure Drop: 1.8 mbar at 60 L/min (per ISO 9360-1:2022)

Clinical Applications

ICU ventilators requiring >72h continuous operation

Transport ventilators exposed to uncontrolled environments

Nebulizer circuits during aerosol-generating procedures (AGPs)

HFOV systems where conventional filters cause pressure oscillations

Regulatory Approvals
CE Marked (MDD 93/42/EEC), FDA 510(k) cleared (K191968), and TGA Australia listed (ARTG 337867).

Environmental Specifications
Operating Temp: -20°C to +50°C
Storage Humidity: <80% RH non-condensing
Shelf Life: 5 years in original packaging