ZOLL AEV Operator's Manual page 117

Bacterial/Viral Filter Use
You can use Bacterial/Viral (B/V) filters in environments where the patient is at risk from cross
contamination or airborne pathogens. When used in accordance with the manufacturer's
instructions, these filters can help prevent inhalation of infectious matter. In dusty
environments, you can also use the B/V filters to prevent entrainment of particulate matter that
could affect the ventilators pneumatic components. To use a bacterial/viral filter, insert the
filter's male 22 mm conical fitting into the Fresh Gas/Emergency Air Intake.
Caution If filters have been exposed to biological matter, dispose of them following the Universal
Precaution procedures for your facility.
Chemical/Biological Filter Use
The ZOLL 731 Series Ventilator is designed to allow attachment of chemical/biological filter/
canister (type C2A1
Intake fitting allows for attachment of standard Rd 40 x 1/7 threads. A complete description of
this standard can be found in BS EN 148-1:1999 Respiratory protective devices - Threads for
face pieces.
Check Valve on Breathing Circuit when in Hazardous Environments
When operating in a Hazardous Situation where a chemical/biological filter is in use, you
should use a Check Valve (
patient's breathing circuit. The exhalation valve on the breathing circuit is not adequate to
protect patients if they rapidly inhale/exhale as the valve may not fully close in time to prevent
hazardous gas entrainment. Also, if the PEEP is set low, patients may inhale faster than the flow
is delivered which could cause hazardous gas entrainment. Consequently, a Check Valve is
required to protect patients.
1. A 3M C2A1 canister (3M St. Paul, MN) was used in our validation testing to represent the class of filters
generically known as C2A1 under the NSN number 4240-01-361-1319. These tests confirmed the
performance of the ventilator when operating with these devices as a class. Use of the 3M canister does not
constitute endorsement or recommendation of the 3M device. Use and selection of the appropriate filter
should always be under the direction of the Incident Commander.
906-0731-01-05 Rev. C
1
) for use in contaminated environments. The Fresh Gas/Emergency Air
704-0700-01) to prevent hazardous gas from entering the
REF
ZOLL Ventilator Operator's Guide 6-5