Final answer:
After sealing the mask on the patient’s face during mouth-to-mask ventilation with oxygen, connect the one-way valve and filter to the mask, ensure body substance precautions are observed, then set the oxygen flow-rate at 15-20 L/min.
Step-by-step explanation:
When providing mouth-to-mask ventilation with supplementary oxygen, after sealing the mask to the patient's face, the first step is to connect the one-way valve and filter (if available) to the mask. Before applying the mask and beginning ventilation, it's critical that body substance precautions are adhered to, meaning proper hygiene and protective equipment are used to prevent the transmission of infections. Once the one-way valve is connected, the oxygen tubing should be attached to the mask, and the flow-rate should be set at 15-20 L/min to ensure enough oxygen is being delivered. It is then appropriate to exhale slowly over the ventilation port for 1.5 to 2 seconds to provide ventilation