Filtration FAQ’s

You’re focused on healthcare provider safety. Organizations like ACS, AORN and SAGES have recommendations on the use of filtration technologies, and we’re here to support your needs. Know your filtration FAQ’s and capabilities of Stryker’s solutions.

Filtration FAQ’s

1. What are the filtration capabilities of the Neptune 3 Rover and SafeAir Compact Smoke Evacuator?

The Neptune 3 Waste Management System is a readily available filtration resource. Neptune is a fluid, smoke, and aerosol filtration system that is installed in over three-quarters of hospitals across the United States and is commonly found in the OR.

Neptune comes with standard integration of two filters:

HEPA – High Efficiency Particulate Air filter.
The HEPA filter, built into the rover, removes particles and odors from air that enters the Neptune rover’s 4L and 20L fluid suction canisters via standard 3/8” suction tubing attached to Neptune manifolds

Stryker’s HEPA efficiency performance is verified via independent lab testing to meet or exceed the IEST-RP-CC001 standard1 , defined by particle collection efficiency of at least 99.97% at 0.3 microns2.

ULPA – Ultra-Low Penetration Air filter.
All Neptune rovers come standard with an ULPA filter receptacle. Use of ULPA filters is a discretionary yet readily available component of the Neptune Rover.
The ULPA filters air that is suctioned into the Neptune rover via 1/4”, 3/8”, or 7/8” tubing applied to the ULPA filter.

The Neptune 3 Waste Management System

The SafeAir Compact Smoke Evacuator utilizes an ULPA filter.

Both the Neptune and SafeAir ULPA filters are verified via independent lab testing to meet or exceed ULPA efficiency performance3,4, defined by particle collection efficiency of at least 99.999% at 0.1 microns per IEST-RP-CC0075.

2. Do Stryker’s filters capture coronavirus?

Stryker has not explicitly tested our filters with coronavirus. Note that respiratory droplets generated by an expiratory event – coughing, sneezing, laughing, talking, breathing – have diameters that cover a large size range from approximately 0.6 to more than 1000 microns6.

Stryker filters will trap at least 99.999% of particles in the respiratory droplet size range. As compared to an N95 mask, Stryker’s HEPA filter is at least 100x more efficient and ULPA filters are at least 1,000x more efficient at their minimum efficiency ratings.

Stryker’s filters

3. What are filtration testing standards?

The Institute of Environmental Sciences and Technology (IEST) filter standards require ULPA filter testing to the Most Penetrating Particle size, or MPPS7,8,9 as illustrated below.

Filters are tested to meet IEST standards at the micron size where they are expected to be weakest.

As illustrated in this graph, these filters are typically more efficient at capturing particulate larger or smaller than the micron size listed in the efficiency rating.

The Stryker Neptune and SafeAir Compact ULPA filters trap all particle sizes at an efficiency rating of 99.999% or better.

ULPA efficiency chart

4. What criteria should be considered when selecting a filter?

Always ensure that the filters selected for use meet published IEST and EN standards.

Stryker has testing documentation available for our HEPA and ULPA filters. Ask your local representative for our Engineering Journal of Record.

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