Fitting an FFP3 respirator FAQs
Last updated: 25 October 2022 at 17:22
Why are the FFP3 respirators (masks) provided different to the usual ones we use?
Due to the sudden increase in demand to use FFP3 masks due to COVID-19, supply chain is using supplies put aside for pandemic flu. They offer the same level of protection but are a different design and model.
Why do I need to be "fit tested" again?
The performance of tight-fitting facepieces depends on achieving a good contact between the wearer’s skin and the face seal of the face piece. Each model of FFP3 mask is slightly different in its fit to each individual face. The only way to ensure that it will protect you is to repeat the fit test again with each model of mask provided. This process to fit check is required every time it is used.
If I was "fit tested" to the make and model in 2009, do I need to do it again?
Yes. Fit testing should be repeated every two years or more frequently if the shape of your face has changed (i.e. weight change, dental/facial surgery or facial mole/growth in seal area). You should also be "fit tested" if there is a change in make or model of mask available to use.
We work in an area that is seeing many symptomatic patients and want to wear an FFP3 mask, but do not have access to them
FFP3 masks are required when managing any suspected or positive COVID patients, and any patient/client who is undergoing an aerosol generating procedure (AGP). The masks are only protective if you have been trained and tested in the correct method of application. If you are looking after this group of patients and there is a possibility that they have COVID-19 please escalate the need for urgent training through your emergency planning and response leads.
Queries can also be directed to COVID19PPE@uhb.nhs.uk.
When should I use FFP3 masks?
FFP3 masks are required when providing care to suspected or positive COVID patients, or when undertaking aerosol generating procedures (AGPs), regardless of the patients’ infection status. They should also be worn when you are caring for COVID-19 patients in a designated high risk unit (e.g. ICU, ITU, HDU, ED resus or designated respiratory wards with tracheostomy patients) because many aerosols will be generated. A definition of AGPs can be found in the 'Infection prevention and control' section.
How long can FFP3 masks be worn for?
FFP3 masks are tested to ensure they remain effective. Provided the seal remains intact, they can be worn comfortably for at least two hours but are effective for longer unless compromised, e.g. splashed with body fluids, damp with respiration. Please refer to the manufacturers’ guidance for maximum duration. This means the masks, if in full working order and fitted properly, can be worn constantly for that period of time, while changing other PPE between patients and cleaning hands. If the mask is removed please dispose of as orange bag (category B) waste, clean hands and change other PPE before reapplying new masks.
If caring for patients in a cohort do I need to change FFP3 masks between each patient like gloves and aprons?
If you are working in a designated high risk unit (e.g. ICU, ITU, HDU, ED resus or designated respiratory wards with tracheostomy patients) where several symptomatic patients are cohorted, the FFP3 masks can be used continually, provided the seal remains intact for at least two hours, please refer to manufacturers’ guidance for maximum duration. Please ensure staff are adequately hydrated prior to applying the mask.
Why has the guidance changed to say we can use a fluid repellent surgical mask (FRSM) when caring for patients?
COVID-19 is transmitted through respiratory droplets, the evidence shows that in most cases when delivering direct care, a FRSM mask will provide adequate protection. Changing the current PPE guidance means that we will be able to ensure that the right equipment is used by the right person at the right time based on the transmission risk. Guidance on what PPE is required for each situation can be found in the "PPE" section.
What is the difference between fit testing and fit checking?
Fit testing is a pass/fail testing method that determines the correct fit of a respirator on an individual’s face.
Two methods are currently in use, either detection of a subjective sense of taste or smell or the physical detection of particles leaking into the mask.
Fit checking is a seal check performed by the user to confirm that the respirator is properly worn. A fit check can be either positive pressure (assessing outward leakage) or negative pressure (where inhalation results in slight collapse of the respirator). It provides excellent assurance that there is minimal leak and should be performed every time a FFP3 mask is donned.
Fit checking (seal checks) should be performed each time the respirator mask is donned and provides reassurance for the wearer.
How does the fit checking process work?
The Trust has produced an instructional video on how to perform a fit check and how to adjust the respirator mask to ensure an adequate seal.
An instructional video and a visual step-by-step guide are available. A fit checking course is also available on UHB Moodle (see "Other websites").
Which staff and at what locations are we currently fit testing?
We are fit testing disposable masks for all members of staff in any department. We have also commenced fit testing on reusable/personal issue respirator masks, one department at a time. For further information, see "Booking fit test training" or contact the team on the email below.
Email: FitTesting@uhb.nhs.uk
Where are the hoods available from?
Hoods are already available in most areas.
Hoods are also stored in the site offices across the four hospital sites.
Does the Moodle fit mask check apply for all respirator going forward should we change stock?
Yes, the fit check video demonstrates the checking of both valved and non-valved respirator masks.
Are we at an increased risk of contracting COVID because we may potentially be using ill-fitting masks?
Clinical work that requires the use of an FFP3 respirator mask must not be undertaken if the individual has not had a successful fit test in the same make and model of mask. A fit check assures that the fit is correct on each application after a successful fit test.
If a previous fit test has failed for a particular model of respirator, it should not be used. If no other respiratory mask is available, then a hood should be used.
Ensure that respiratory masks are changed after an aerosol generating procedure or after a session.
Remember that a significant risk for transmission is from inadvertent contact with a contaminated surface, and then contact with mucosal membranes of the face, eyes, nose and mouth.
Risks of infection can be minimised by following the correct donning and doffing procedures, hand washing and environmental cleaning.