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.
Battery â 1 Year. Below is a side by side comparison chart of the top portable oxygen concentrators that users can carry or wear and offer higher dosages of oxygen. The models below represent the smallest, lightest portable oxygen concentrators available on the market that offer higher oxygen liter flow from 1 to over 4 liters per minute. Portable Oxygen Concentrator Comparison of the smallest portable oxygen machines weighing under 10 pounds. Portable Oxygen Concentrators.