In 1955, the Pizza Hut restaurant was first commenced. Its first logo featured its only mascot Pete holding the words Pizza and Hut. 1967â1999. In 1967, the chain began using a new and simplified logo featuring the now-famous red roof design (which is still used albeit in a modified form today).
Oxygen therapy can be delivered using a low flow or high flow system. All high flow systems require humidification. The type of humidification device selected will depend on the oxygen delivery system in use, and the patient's requirements. The humidifier should always be placed at a level below the patient's head.
There are two main types of oxygen toxicity: central nervous system (CNS) oxygen toxicity and pulmonary oxygen toxicity. CNS oxygen toxicity is usually caused by divers exposing themselves to an oxygen partial pressure of 1.6 ata or greater, and can result in convulsions, pulmonary barotrauma, and death.ulmonary oxygen toxicity is caused by divers exposing themselves to elevated partial pressures of oxygen for long periods of time, and is primarily a concern for technical divers who decompress on oxygen.