Oxygen concentrators are used by patients those need oxygen therapy on emergency cases. This is a small and portable type of oxygen concentrator that looks same as home oxygen concentrator. The best part is that the patient can use it while moving from here and there or can also accommodated while traveling. At present, this life saving device is approved by FFA and can placed in your vehicle. POC past models were not good and were huge and bulky. It was not reliable and was also not permitted to take in a flight. It was the year 2000, when new designs of POC models were launched those was efficient and practical. Now, you can easily charge O2 concentrators with the help of vehicle adapter or also can be used with batteries.
If you have seen home concentrators, then you can easily understand the technology behind POC. At present, oxygen concentrators can also be charged direct with electricity. Oxygen concentrator operates on PDS (pulse delivery system that facilitates best purity of oxygen. POC has lots of benefits are on demand. First thing is its lightness and portability and at the same time it is better than home oxygen system. With ease the patient can inhale oxygen for the on-demand device and there will be no way to eliminate pointless oxygen. 
The on-demand system has different types of settings that allow liters/oxygen every minute. Oxygen concentrator will block oxygen wastage during exhale and will focus more or inhale. Boluses are used in this technology that differs on the patient’s breathing rate. Normally, the rate goes down when the patient is in sleep. In POC, bolus system helps the patient to oxygen according to his or her breath. If the breath is in higher rate, then the flow of oxygen will be high and when the breath is slow the oxygen flow will be slow.
This medical product is a part of those people who has problem in taking breath. I think this product help to survive those people.
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