Factors influencing the pressure-flow-perfusion system

The methodology of the "Pressure-Flow-Perfusion System' used in the "Whitaker Test' was examined for factors which influence intrinsic resistance of that system. Considerable pressure changes were incurred by varying the concentration of sodium diatrizoate, perfusing needle, temperature and flow rates. For each renal pressure-flow-perfusion test, the resistance must be determined because of the effect of each variable in altering the intrinsic resistance.