It is a condition where the alveoli are deflated, as distinct from pulmonary consolidation. It is a very common finding in chest x-rays and other radiological studies. It may be caused by normal exhalation or by several medical conditions. Although frequently described as a collapse of lung tissue, atelectasis is not synonymous with a pneumothorax, which is a more specific condition that features atelectasis.
There are two types of portable oxygen concentrators available on the market today: Continuous flow oxygen concentrators and pulse dose, or intermittent flow, oxygen concentrators. These two types of oxygen systems have very different benefits and limitations and each is best suited for a specific type of patient.
What is the portable oxygen concentrator. DeVilbiss Oxygen Concentrator. Portable oxygen concentrators or POC are portable machines designed to provide oxygen therapy to the patients at a much higher concentrations than the levels found in the ambient air. Known as portable concentrators, they are similar to oxygen concentrators but with the difference of being smaller and mobile (portable).