« Look, we already did a oxygenator with the fish tank pump« celebrates a woman in a video posted on Instagram. The end is even more optimistic: « and we already put the oxygenator and yes the oxygen rises to 93 « .
Derived from emergency what’s for him oxygen shortage, in social networks, videos like the one described began to circulate, where it is taught to do home oxygenators with a fish tank pump, hoses and a dispenser cup, to rescue the covid-19 patients.
Specialists, however, warn that these devices are useless, because they do not separate the nitrogen, he hydrogen, he carbon and particles of air that they can pollute the lungs, they have no way of regulating the pressure or flow that each patient requires and, instead, they involve a risk.
Gustavo Ariza, secretary of Civil protection of Puebla, said that the only thing that is done with that mechanism is collect air of the environment and gets into a humidifier to give to the patient.
« To give you an idea, the air we breathe has a content of 21 percent oxygenThat is the amount that is entering through a pump and we are putting it into the patient, « he said.
« The oxygen that patients need is between 40 percent and 60 percent of gas, he oxygen is a medicinal gas and you have to understand it like that, it is not air, « he added.
The doctor Mauricio Rodriguez, spokesperson for Covid-19 advice of the UNAM, said to wear those home oxygenators « It’s like I’m blowing you like this with my breath and we already think there is more oxygen. »
« The first thing that worries is that by being using this strategy they delay the care, the patient will get worse. That is the dangerous thing: that they are using that, believing that it works, » said Rodríguez.
The specialists explain that what patients with respiratory distress and low blood pressure really need oxygen saturation, is this gas at 93 percent purity chemically processed in very high concentrations and supplied at a certain pressure to achieve its purpose, as is the case with oxygen tank.
Another option is a concentrator that takes oxygen from the environment and it delivers it in a more concentrated form, but fails to approach 100 percent. The percentage varies greatly depending on the specifications of the device.
The Dr. Roselyn Lemus-Martin, researcher on issues of covid-19 in the Oxford University notes that « a tank contains a certain amount of oxygen at a specific pressure that is constantly dispensing oxygen.
« The concentrators are devices that are filtering the air that circulates in the environment in a certain percentage to give oxygen and that work connected to a electric current« , it states.
The interviewees indicated that the doctor must indicate what is better: if a tank or a concentrator. And in the case of the concentrator, the capacity of liters per minute that the device can dose, check if it can continuously supply pure oxygen 93 percent and approved by the Cofepris.