The Trilogy Evo Ventilator: Fitting the Full-Face Mask

The full-face, non-vented face mask is the guideline suggested patient interface. It covers the patient’s nose and mouth and is secured in place using straps around the head. The elbow of the mask should be blue; this means that there is no exhalation valve which is important for infection control in COVID-19.

To fit the mask:

  1. Identify the correct size of mask using the manufacturer’s sizing guide (XS, S, M, L, XL, etc.) to fit from the small of the chin to the bridge of the nose.
  2. Position the lower point of the mask in the small of the chin, roll the mask up and over the face and pull the headgear around the patient’s head and secure in place with clips.
  3. Adjust the tension of the straps to secure the mask in place, making sure you can fit fingers between the straps and the side of the patient’s face.
  4. Attach the non-vented elbow to the antibacterial-viral filter, and the rest of the patient circuit.
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