meningitissorry about the formatting, they were supposed to be bullets not italic.
drdoomlooks good to me! ;) instead of asterisks try using the plus sign for unordered lists; the system gets confused sometimes because the asterisk is also for italics 😊+12019-06-12T04:27:21Z
meningitisYeah, I noticed :s
Oh, I didnt know the + sign did that! Very much appreciated, I will try that next time.+12019-06-15T02:18:46Z
madeforupvoting2CPAP increases intrapleural pressure as the elevated airway pressure is transmitted to other things in the cavity (lung pushes on pleural space/cavity which can then push on other structures). This can lead to compression of veins, including the vena cava -> decreased venous return -> decreased bp (from decreased preload). This is similar to what happens during valsalva (exertion phases) though the positive pressure is provided by a machine pump instead of abdominal muscles/diaphragm. I think heart rate likely increases instead of decrease as a compensatory response.
Here’s one site that explains it well (the “free” content is enough and probably already exceeds the depth one might need to know) https://thoracickey.com/extrapulmonary-effects-of-mechanical-ventilation/+32019-05-31T14:31:52Z
apolla24I guess since changes in HR are such a transient phenomenon and you only have sustained increase in HR when exercising or like acutely experiencing some medical emergency vs BP that can be elevated for long periods of times with no effects. Therefore an improvement in BP is more important. That’s my take.+2019-05-31T14:33:45Z
pg32I just thought of it as follows: he has high BP due to pulmonary vasoconstriction as well as widespread sympathetic activation (as if he is being partially strangled all the time, because he basically is). Increasing oxygenation will relax his pulmonary vasculature and decrease sympathetic stimulation throughout the body, leading to a drop in blood pressure. +12020-01-24T18:50:22Z