Nonrebreather masks (at best approx. 70% oxygen concentration) are not always fixed performance devices because the patients can have inspiratory flow rates greater than the mask can deliver. If the reservoir bag collapses, the flow is not high enough for the patient. A HFNC is a high flow device (examples Vapotherm and Airvo 2). The HFNC that do not have active heaters, like the Salter, are actually low flow devices because they can only deliver a maximum of 15 L/min Most patients have an inspiratory flow of approximately 20 to 30 L/min. The technical definition of a high flow device is a device that can deliver at least as much as the patient’s inspiratory flow rate (> or equal to a minimum of 30 L/min). N
@@viviandsouza5 Every lab uses 3.5 meq/L, the answer that it can quickly decline from 3.5 is logical, but probably not a precise one. Is there any randomised clinical study regarding that?
thank you so much! i’m writing a paper on this topic for my medical ethics course and couldn’t find many good explanations on determining capacity of a patient that is refusing treatment based on denial of the illness being real. this is exactly what i was looking for!
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