5LPM Health Medical Oxygen Concentrator Application: Cardiopulmonary patients Oxygen uptaking could suspend illness to get worse, improve respiratory function and immunity of our body. And can alleviate or remit shortness of breath, to make you are refreshing and active and improve quality of life. Keep long time oxygen therapy, it will be important in recovering of disease absolutely. Old and aged people help to be vigorous and defer senility Old man's vital capacity goes downhill quickly;some vitals...