RIU 324 Lecture Notes - Lecture 8: Stenosis, Hemodynamics, Pulse Pressure
12 Mar 2020
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1. if the vessel radius triples, the resistance decreases by a factor of 81----- 2. what is the average spatial velocity at point b for the diagram in the graphic below? a. res= 1/r^4 a. vaaa=vbab b. 4x4=vbx 1cm^2 c. 16cm/sec. 3. the resistance if a vessel is stenosed such that the residual diameter is 25%, will increase by a factor of 256 a. r=1/4 b. ^4= 256. Delta p= q so if you double one you double the other. 5. if a vessel vasodilates such that the new radius is twice the original, how much more blood volume can be supplied for the same pressure gradient? a. increase by a factor of 16. 7. list the factors in poiseuille"s equation and what they represent? a. q= flow b. delta p= pressure change c. r= radius d. l= length e. n= viscosity a. increased kinetic energy distal to stenosis.
