Wider blood flow restriction cuffs require lower pressure to reach arterial occlusion.

“is it safe to say that the wider the cuff the lower um pressure you need to reach occlusion yes that's definitely true”

“so when we say 40 of aop that doesn't necessarily mean a 40 reduction in blood flow either that's right”

“before we do exercise let's just take the cuff up to the lowest pressure of which there is no flow at all so if that's 100 millimeters of mercury means that you no longer have flow going into your limb at all let's take a percentage of that so we know that you always have flow during the exercise so now do you determine that with doppler at some distal point to the occlusion yes you can you can use ultrasound we use just a handheld doppler probe that's essentially detecting the pulse so we'll look we can look at it here we look at it at the ankle so before we have anybody do any exercise we just lie them down we slowly inflate whatever cuff we're going to use because the cuff size matters it's going to it's going to totally change the pressure applied so we slowly inflate it until we don't hear any more flow and then we take a percentage of that so if the arterial occlusion pressure which is the lowest pressure of which there is no flow if that's a hundred millimeters of mercury then we'll typically apply anywhere between 40 and 80 millimeters of mercury in our lab at least yeah”