Why is it important to monitor the reservoir bag during non-rebreather mask ventilation?

Monitoring the reservoir bag during non-rebreather mask ventilation is crucial because it ensures that a proper flow rate is being delivered to effectively provide oxygen to the patient. The reservoir bag serves as a reservoir of oxygen, allowing for a high concentration of oxygen to be available for inhalation when the patient breathes in. If the flow rate is insufficient, the bag may not sufficiently inflate, potentially leading to inadequate oxygen delivery and affecting the patient’s ability to receive the necessary respiratory support. By observing the bag, the rescuer can confirm that it is filling adequately during the patient's inhalation and emptying properly during exhalation, which indicates that the system is functioning as intended. This monitoring helps in maintaining the efficacy of the ventilation being provided to the patient.