title: Pressure-flow relationship in partial obstruction of ureter in pigs.
abstract: In 10 female pigs, the proximal part of the left ureter was obstructed for 10 weeks by implantation of the ureter into the psoas muscle. After 9 weeks of obstruction, 6 systems showed delayed or impaired drainage at renographic examination. Renal function was slightly impaired in 1 case. At operation, 4 systems were macroscopically normal while the rest showed slight to moderate dilatation. The intrapelvic resting pressure was normal in 8 of 9 cases. At perfusion, all systems responded within the normal limits at 8 cm3/min while high-pressure responses were found in 4 units above 8 cm3/min. No correlation was found between the resting pressure and the pressure response and the degree of dilatation or impairment of renal function.
mesh_terms: D000818:Animals; D005260:Female; D010477:Perfusion; D011312:Pressure; D011866:Radioisotope Renography; D013552:Swine; D014517:Ureteral Obstruction / Q000503:physiopathology*; D014563:Urodynamics