NEW STUDY! Parasym Plus™ for Multiple Sclerosis › Forums › PrettyIll.com Discussion › Coping › MRI showing issues of hindered Cerebro Spinal Fluid (CSF) Flow – Hydrocephalus, Empty sella, etc › Reply To: MRI showing issues of hindered Cerebro Spinal Fluid (CSF) Flow – Hydrocephalus, Empty sella, etc
Found it! In 2012 I came across a mathematical formula which said:-
CPP = MAP – ICP
CPP is Cerebral Perfusion Pressure
MAP is Mean Arterial Pressure
ICP is Intracranial Pressure
CPP for an adult should always be maintained (range 70-90, below 70 leading to brain ischemia) so, based on further reading, I took the average of this as a constant (80) just to experiment and see what was happening to my ICP. So:-
CPP = 80
MAP was calculated by taking the Diastolic Pressure (DP) measurement of the blood pressure reading and, adding to this a third of the Pulse Pressure (PP). The PP being Systolic Pressure minus Diastolic Pressure.
MAP = DP + (PP/3)
So if I knew those 2 measurements, I could work out (roughly) my ICP.
Let’s take an example of BP 130/70 which would calculate the Pulse Pressure (PP) as 130 – 70 = 60.
The MAP calculation is the lower BP figure of 70 + a third of the PP of 60 (which would be 20) so 70 + 20 = 90.
We take CPP = 80
Now lets put this into the equasion to find out the ICP:-
CPP = MAP – ICP
80 = 90 – (in this case 10) which is a normal result
Have Fun,
Barbara