Pyelography (pyelo-ureterography) a study of the normal and pathologic anatomy of the renal pelvis and ureter . Fig. 175.—Shadow in the right renal area. tion of the stone in the true pelvis. In all probabihty thepelvis is not completely filled. However, a moderate degreeof dilatation is visible in the ureter, demonstrating theexistence of an infection probably caused by the stone. Stone in the Calyx.—Localization of a shadow to a certaincalyx is possible: (1) When the stone shadow is visiblethrough the outline of the calyx; (2) when the peculiaritiesin the outline of the calyx correspond with
Pyelography (pyelo-ureterography) a study of the normal and pathologic anatomy of the renal pelvis and ureter . Fig. 175.—Shadow in the right renal area. tion of the stone in the true pelvis. In all probabihty thepelvis is not completely filled. However, a moderate degreeof dilatation is visible in the ureter, demonstrating theexistence of an infection probably caused by the stone. Stone in the Calyx.—Localization of a shadow to a certaincalyx is possible: (1) When the stone shadow is visiblethrough the outline of the calyx; (2) when the peculiaritiesin the outline of the calyx correspond with those seen in the RENAL STONE 203 stone shadow, and (3j when the position of the cal^x C(jr-responds with that of the stone in the original plate. Occasionally, however, a stone may be lodged in a calyxwithout any data being present to define its exact localiza-tion. All the calyces may be dilated to about the sameextent and character and offer no localizing , the relative position in the two plates may be in-. Fig. 176.—Renal stone (pyelogram of Fig. 175). exact, so that on comparing the position of the originalshadow in the radiogram with that in the pyelogram we mayfind it very difficult to decide in which calyx the stone islocated. With equal dilatation of all calyces, the stone isusually in the true pelvis; when one calyx is considerablylarger than the others, it is apt to contain the stone. Astone in the calyx will cause dilatation of the calyx either as 204 PYELOGRAPHY a result of secondary infection or mechanical a rule, the inflammatory changes are more prominentthan the mechanical, although evidence of both may be ap-parent. A stone situated in a calyx the base of which isbroad and open to the lumen of the true pelvis should beconsidered as a pelvic stone. When the isthmus is so nar-row that a stone in the calyx could not be removed through
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectkidneys, bookyear1915
