If you buy a new ventilator today for your preterm infants, you cannot avoid having ‘sophisticated graphics’. These ‘sophisticated graphics’ are supposed to help you ventilate the babies appropriately. I have always been very skeptical about ‘sophisticated graphics’ as they never look like the pretty curves in the books and review articles with clear inflection points, that, supposedly, allow you to tell whether a patient is over-distended or under-inflated.
So I thought I would get the readers of this blog to help me with a little project. I took some photos of real-life pressure volume loops on ventilators in my NICU, either EvitaXL or VN500. I have created a survey monkey survey that will take you about 3 minutes to complete. I will give you some info about each baby, and I would like you to look at each loop, and tell me whether you think the lung is overdistended, or underinflated, and what change in ventilation you think should be made as a result of seeing the loops. The first thing that I have to admit is that to get clean loops like these is not very easy, often you have to freeze the screen multiple times to choose a loop that looks like something, and is not, for example, a double figure of 8 loop that crosses over itself multiple times. Which immediately introduces an element of subjectivity.
So the idea of this little survey is to see if people can agree to what the loops actually show.
The survey is at the following link https://fr.surveymonkey.com/s/BJF2JJF