The CPR emergency mask is a common emergency equipment used to protect direct oral contact between the first responder and the rescued person during cardiopulmonary resuscitation (CPR). It usually consists of the following parts:

1. Mask part: usually made of transparent plastic or silicone, which can completely cover the mouth and nose area of ​​the rescued person. The mask is designed to be round or oval to ensure that it can fit the faces of most adults and children, thereby effectively closing the air flow channel.
2. Connection part: The pipe that connects the mask to the artificial respirator or mouth-to-mouth breathing equipment used by the first responder. This part is usually a hose or a retractable material to ensure that the mask is connected to the breathing equipment during use.
3. Anti-backflow valve: located inside the mask, used to prevent the exhaled air of the rescued person from flowing back into the first responder’s mouth. This design can protect the first responder from possible infectious diseases or other health risks.
4. Rubber sealing ring: located on the outer edge of the mask, used to form a seal around the face of the rescued person to prevent air leakage and ensure the effectiveness of artificial respiration.

The CPR first aid mask is designed to simplify the cardiopulmonary resuscitation process while minimizing direct contact between the first aider and the rescued, ensuring the safety and effectiveness of the first aid process.