An oxygen concentrator is a device used to deliver concentrated oxygen to a patient requiring oxygen therapy. These devices are considered as a safer, easy to use and inexpensive compared to compressed oxygen cylinders. Portable oxygen concentrator is useful to people using oxygen tanks as a constant supply of oxygen by enabling them mobility. Portable oxygen concentrator acts by increasing the concentration of oxygen by taking a mixture air from its surrounding. Airstep Freestyle, Inogen One G2, Invacare XPO2 and DeVilbiss iGo are some the commercially available portable oxygen concentrators. These devices are also used by mountaineers and people travelling to places where oxygen is inadequate amount.

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Major factors expected to drive the market for portable oxygen concentrators include its ability to provide oxygen under all circumstances and worldwide aging population coupled with COPD and other respiratory diseases. Advantages associated with these devices such as they weigh less, easy to use and more affordable are also predicted to drive the market further. WHO suggests that approximately 65 million people are suffering from moderate to severe chronic obstructive pulmonary disease across the globe. In 2005, an estimated 3 million people died because of COPD. North America and Europe are the market leaders because of high level of consumer awareness and approval by regulatory authorizes of these regions. FAA (Federal aviation Administration) approved the onboard use of certain portable oxygen concentrator. In Asia-Pacific, Japan, India, China and Australia are the leaders in the market for portable oxygen concentrators. In Latin America, Mexico and Brazil are expected to witness a substantial growth in coming years due to continuously increasing healthcare expenditure in the region.

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Some of the major companies operating in this market are Inogen, Philips Healthcare, AirSep, O2Concepts Oxlife, Vygon, Nidek Medical, Inova Labs, OSI Systems, Smiths Medical and Teijin.