Oxygen therapy is widely available at most vet surgeries since the oxygen cylinder attached to an anesthetic machine can be used to deliver emergency oxygen as necessary. In recent years, More and more people adopt pets, including the dog and cat etc, so the PSA oxygen concentrators have become more and more popular in veterinary anaesthesia and oxygen therapy, and the oxygen concentrator have almost become standard equipment in pet hospitals. It is usually used for animal such as direct oxygen inhalation of animals, nebulization therapy, ICU or oxygen source for oxygen chamber and anaesthesia.