Step I Vascular Resistance formula

Started by beatsbydre
Get help with your application

Use all the free resources available to you from SDN: articles, guides, expert advising, forums discussions, and school research.

Browse articles Compare schools My application plan Read Interview Feedback
Practice for interviews Ask an Advisor
B

beatsbydre

Full Member
10+ Year Member
The formula to vascular resistance is 80*(deltaP)/CO. Where does this 80 come from? Is this supposed to be the HR so that it would be deltaP/(CO/HR)?

Thanks!
 
Sort by date Sort by votes
The formula is basically a take on Ohm's law, V=IR (or in this case, R=V/I). Resistance is delP/CO, which gives you units in mmHg*min/L, which aren't the standard units of measurement. The multiplication by 80 is there to convert that number to dyn*sec/cm^5, which is more standard. More rarely you can see multiplication by 8, which converts the number to MPa*s/m^3.

tl;dr It's a unit conversion factor baked in.
 
Upvote 0 Downvote
You must log in or register to reply here.