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Tell you how to match a ventilator with an oxygen concentrator
Oxygen concentrator use with the ventilator is not complicated, mainly in the choice of oxygen machine remember to choose 5L oxygen machine, or above 5Loxygen machine. Because oxygen purity will be diluted a lot once oxygen mixed with air from the ventilator, generally 3L or smaller oxygen concentrator effect is limited.
To make this clear, I'll put up a picture of the concentration of oxygen after mixing the ventilator with different pressure, with different flow sizes of oxygen.
I circled in the picture with three red boxes, first of all, the reality of the majority of users of the ventilator pressure will not be less than 13 cm H2O, from the table in the picture can be seen, if the oxygen flow rate to 1.0L / min, when the ventilator out of the gas oxygen purity is only 23.8%, we know that the oxygen purity in the air is 21%, you can see that the oxygen flow rate of 1L / min when the oxygen concentration The improvement is limited.
When we adjust the oxygen flow rate to 3.0L/min, the oxygen purity of the gas blown out by the ventilator is 28.2%, which is a large increase in oxygen purity. When the oxygen flow rate is adjusted to 5.0L/min, the gas oxygen concentration blown out by the ventilator is 32.1%.
Because we are recommending oxygen therapy for patients like COPD, old slow branch, emphysema, etc. according to the low oxygen purity, which is generally better below 35%. So 5L oxygen machine is more in line with the use of ventilators together.
Some people say that the oxygen machine 1L can also adjust the flow rate to 5, why can't the 1L oxygen machine? In fact, we are currently talking about a few liters of oxygen machine means that the flow rate is adjusted to a few, the oxygen purity is still above 90%, and what you call 1L oxygen machine is only oxygen flow rate to 1L/min when the oxygen purity is higher than 90%, when you adjust the flow rate to 5L/min the oxygen concentration is very low.
