Supplemental oxygen is an important aspect of supportive care, both in the hospital and at home. A Venturi mask -- also known as an air-entrainment mask -- is a medical oxygen delivery mask that utilises a flow meter to deliver a precise amount of oxygen. Venturi masks are indicated for use in those individuals experiencing chronic or acute respiratory distress, or when an arterial blood gas result indicates a need.
Wash your hands with soap and warm water. Hygiene is crucial when handling oxygen masks and supplemental oxygen tubing.
Remove the mask and oxygen tubing from the packaging. Inspect the mask and tubing -- looking for cracks and discolouration. Discard any masks or tubing that are not intact.
Select the appropriate flow valve according to a physicians orders. Venturi valves are coloured according to the amount of oxygen they deliver in litres per minute.
Most manufacturers follow a standard colour chart. Refer to the instruction manual of the mask, if you are unsure.
Blue valves deliver 2 litres of oxygen per minute at a 24 per cent concentration.
White valves deliver 4 litres per minute at a 28 per cent oxygen concentration.
Yellow valves deliver 6 litres per minute at a 35 per cent oxygen concentration.
Red valves deliver 8 litres per minute at a 40 per cent oxygen concentration.
Green valves deliver 12 litres per minute at a 60 per cent oxygen concentration.
Assemble the mask by inserting the flow valve into the mask. Attach the oxygen tubing to the mask and the supplemental oxygen source.
Place the mask on the face, so that the small pointed end of the mask rests on the bridge of the nose. The larger rounded portion of the mask should rest on the chin. Pull the elastic band gently over the back of the head to secure the mask in place.
Pull the ends of the elastic band to make adjustments to the mask, so that it fits comfortably. Make sure the mask and bands are not impeding venous blood flow. Signs of impeded blood flow are pain, numbness, and discolouration of the area.
Turn on the supplemental oxygen -- adjusting it slowly -- until you reach the desired therapy level.
Check the tubing and mask for leaks. Tighten airline connections and mask fit, as needed to fix leaks.
In the hospital setting, Venturi masks are for single patient use; discard additional regulators, only after the patient has been discharged.