What is VV ECMO?
VV ECMO is for patients who are experiencing respiratory failure.
What is VV ECMO?
Let’s look at what is VV ECMO. VV ECMO is for patients who are experiencing respiratory failure. VV ECMO is not for patients that have experienced any type of cardiac failure and so it principally the VV ECMO device the the circuit itself functions as an artificial lung with no direct circulatory support. I will say the reason i underline that no direct circulatory support it’s not helping the cardiac ejection or function at all the only support that some people will claim from a VV ECMO is that the increased oxygenation that we’re providing that then makes its way to the coronary arteries which it wasn’t doing before that increased oxygenation coming down the coronary arteries sometimes improves and acts as an indirect positive contributor to circulatory function but it is actually not as of a device itself contributing anything to the circulatory support that is a great point and and actually. I threw some slides together for my talk and i that’s i’m so glad you brought that up yeah some people don’t think about that so VV ECMO again is basically indicated in patients with severe respiratory failure that’s refractory to optimal mechanical ventilation and medical therapy that’s the basic concept when you’ve already exhausted your maximum ventilator support and maximal pharmacological logical support and your patient is still uh failing pulmonary wise V-V ECMO is the uh is the staff got stop stop dot measure there for the goal of V-V ECMO now this is a take-home message for people who don’t do ECMO terribly a lot the goal of VV ECMO is to auctionate at least 60 percent of the patient’s cardiac output and it quite possibly could be more than that but the reason i point this out is that when you’re selecting cannulas and we’re going to talk about cannulas here shortly when you’re selecting the size of the cannula you should do a quick assessment of your patient’s cardiac output and see if you’re going to be able to flow and capture with the cannulas you’re inserting 60 of the patient’s cardiac output see 40 of it is going to get past the cannulas in this case and you’re not going to be oxygenating that 40 percent and it’s left to the lungs to contribute something or maybe they don’t contribute anything at all.
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