Showing papers by "Howard M. Pollack published in 1966"

Further cinefluorographic observations on the upper urinary tract. II. The effects of diuresis and ureteral obstruction.

Abstract: Study of the physiology of the renal pelvis and the ureter has been hampered by the relative inaccessibility of these structures. Frequently examinations have been performed with instruments and equipment which, by the very nature of their construction or method of application, yielded results rendered invalid through artefact production. Although at present several methods for the study of renal pelvic and ureteral function yield acceptable and reproducible results, (3, 5, 9–11) only radiography permits direct observation of undisturbed structures under consideration. A previous publication has shown that cinefluorography is a satisfactory technic for visualizing the dynamic changes which occur in the normal upper urinary tract (1). At that time, it was pointed out that the activity of the upper urinary tract could be divided into two patterns: that of the bifid renal pelvis, in which the contractions originate in the upper infundibulum and that of the ampullary renal pelvis in which the contractions ori...