Experimental study of the pressure-volume and pressure-time relations in the completely obstructed pelvis of the porcine kidney. Part 3: Stability of the pelvicalyceal system.

In a series of experiments with pigs the completely obstructed renal pelvis was filled with Ringer's lactate at a constant rate of 2 ml/min. At various pressure levels lower than 50 mm Hg the relations pressure vs infused volume and pressure vs actual intrapelvic volume were repeatedly measured. It was concluded that the measurements were reproducible and that the pelvicalyceal system is -under these experimental conditions- a stable elastic unit.