What is the main benefit of using a bag-valve-mask resuscitator?

The main benefit of using a bag-valve-mask resuscitator lies in its ability to deliver high concentrations of oxygen to a patient in respiratory distress or failure. When applied correctly, this device can effectively ventilate the lungs by providing positive pressure ventilation, ensuring that a significant amount of oxygen reaches the alveoli for gas exchange. This is crucial during resuscitation efforts or in situations where a patient cannot breathe adequately on their own.

While other factors such as ease of use, versatility, and cost effectiveness are important considerations when evaluating the utility of a bag-valve-mask, they do not match the critical benefit of its ability to supply high levels of oxygen. The primary goal in emergency situations is to support a patient's respiratory function, making high oxygen concentration delivery essential for improving outcomes.