Non-Rebreather Mask (Adult)

Purpose & Use

• A non-rebreather mask (NRM) is a high-flow oxygen delivery device used in emergencies or critical care to deliver high concentrations of oxygen (60–100%).

• Commonly used for patients with severe hypoxia, respiratory distress, or trauma.

• Designed to prevent exhaled air from mixing with oxygen, ensuring maximum oxygen delivery.

Structure & Components

• Mask: fits over the nose and mouth with a soft, flexible cushion for comfort and minimal leakage.

• Reservoir bag: attached to the mask, holds a supply of oxygen for inhalation.

• One-way valves:

  • Between the mask and reservoir bag to allow inhalation of pure oxygen.

  • On exhalation ports to prevent rebreathing of exhaled air.

• Elastic straps: secure the mask to the patient’s face.

• Oxygen tubing connector: attaches to oxygen sources or flowmeters.

Performance & Flow Rate

• Delivers high oxygen concentrations (up to 100%) when properly fitted.

• Requires oxygen flow of 10–15 L/min to keep the reservoir inflated and ensure effectiveness.

• One-way valves prevent rebreathing of CO₂, unlike simple masks.

Advantages

• Provides maximum oxygen delivery in emergencies without intubation.

• Simple, lightweight, and easy to apply.

• Rapidly increases oxygen saturation in hypoxic patients.

• Disposable and single-patient use reduces infection risk