These barriers should provide a one-way filter valve which lets the air from the rescuer deliver to the patient while any substances from the patient (e.g. vomit, blood) cannot reach the rescuer. Many adjuncts are single use, though if they are multi use, after use of the adjunct, the mask must be cleaned and autoclaved and the filter replaced. It is very important for the mask to be replaced or cleaned because it can act as a transporter of various diseases.
These barriers should provide a one-way filter valve which lets the air from the rescuer deliver to the patient while any substances from the patient (eg. vomit, blood) cannot reach the rescuer. Many adjuncts are single use, though if they are multi use, after use of the adjunct, the mask must be cleaned and autoclaved and the filter replaced. It is very important for the mask to be replaced or cleaned because it can act as a transporter of various diseases.