Oxygen Delivery Devices

Oxygen Delivery Devices

A nasal cannula is a low-flow device. Oxygen is delivered via the cannulas with a flow rate of up to 6 liters per minute. Flow rates greater than 4 liters per minute are not often used because of the drying effect on the mucosa and the relatively little increase in delivered oxygen concentration.

The simple face mask is used for short-term oxygen therapy. The mask is contraindicated for patients with carbon dioxide retention because retention can be worsened such as in COPD.

The partial rebreathing mask and the non-rebreathing mask are low-flow devices with a reservoir bag. Frequently inspect the bag to make sure it is inflated. If it is deflated, the patient may be breathing large amounts of exhaled carbon dioxide.

The venturi mask is a high-flow device, this mask entrains room air to achieve a consistent and precise oxygen delivery. The venturi is helpful for patients with COPD who require low, constant oxygen concentrations.