A minimum of 6 l/minute of oxygen flow is needed 2to prevent rebreathing of exhaled carbon dioxide. Oxygen delivery devices and ļ¬ow rates should be adjusted to keep the oxygen saturation in the target range. Clinical Guidelines Nursing Oxygen Delivery At a respiratory rate of 10 breaths.min −1, the mask delivered a mean eioc of 94.67% and 88.33% at 15 l.min −1 oxygen flow rate for tidal volumes of 300 and 500 ml, respectively. Oxygen delivery devices and flow rates pdf . Will deliver total flow to patient approximately 45 lpm. Low flow devices such as nasal cannulas, simple face masks, and reservoir masks deliver oxygen at rates below the normal patient inspiratory flow rate of about 30 liters/minute. Oxygen delivery systems in hospitals and small health facilities. The percentage of oxygen inspired depends on the flow rate and the delivery device; Oxygen delivery devices delivery device minimum to maximum liter flow range (adults) approximate o2% delivered notes rt assist...