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.
The volume of gas and the shape of the pulse of gas delivered to the patient is controlled by the variable gas volume delivery portion 70 of the pneumatic oxygen conserving device 30. Typical oxygen delivery wave forms for the oxygen delivered through cannula 19 is shown in FIG. 2.