Question

A 5 ft 8 in tall male with a RR of 35 is currently on a 50 % air-entrainment device powered by a flow of 12 liters. Is this device producing enough flow to meet the patient’s inspiratory flow demand?

Answer 1

The venturi mask , also known as an air entrainment mask, it is a medical devices to deliver a known oxygen concentration to patients on controlled oxygen therapy. As we were very well known that this device was invented by Moran Campbell.

Fi​​​​​O_{​​​​2} is the fraction of inspired oxygen percentage.

Venturi mask are considered high flow oxygen therapy device. This is because venturi mask are able to provide total inspiratory flow at a specified FiO_{​​​​2}​​​ to patients therapy.

Air entrainment masks, although considered high flow systems, are not always able to guarantee the total flow with oxygen percentage above 30% in patients with high inspiratory flow demands . The problem with air entrainment system is that as the FiO2 is increased , the air to oxygen ratio decrease.yes, this is very important to remembered it.

It could be better be explained as likely for 30% then ratio is 8:1 that is eight part air to one part oxygen

For 40 % the ratio be decrease to 3:1 that is three part air to one part oxygen ,

As a male with 5ft 8 tall, with the high respiratory rate 35. Which he is on 50% air entrainment device then the ratio will be 2:1

Since the jets in venturi mask marks generally limit oxygen flow to 12-15 liters per minute, the total flow decrease as the ratio decrease.

So, we can this device doesn't produced enough flow to meet the patients inspiratory flow demand.