What is the ratio of ambu bag?

The ratio of an ambu bag (or bag-valve-mask) typically refers to the volume of air delivered by the bag to the patient's lungs. A standard adult ambu bag usually has a volume of around 1,000 to 1,500 milliliters, while pediatric bags range from 250 to 500 milliliters. The bag is designed to deliver positive pressure ventilation, and the ratio of bag squeezes to breaths is often guided by the patient's needs and the provider's training, commonly at a rate of 10-12 breaths per minute for adults.