Accuracy in diagnosis in the urinary tract is largely due to experienced interpretation of cystoscopic and radiographic findings. Although both the cystoscope and the radiograph are of individual value, we are learning to recognize that neither method is complete without the data obtained from the other. Recently we have discovered that the union of the two methods in simultaneous examination has given us a new and valuable field for diagnostic data. This latter method is known as pyelography and consists of the injection of an opaque fluid substance into the ureter and renal pelvis followed. by immediate radiography.
During the past three years, at the Mayo clinic, St. Mary's Hospital, we have employed the radiograph of the injected urinary tract in over 500 cases and have come to regard it as a valuable and frequently necessary aid in arriving at the correct diagnosis of conditions in the urinary tract. Its
BRAASCH WF. THE VALUE OF PYELOGRAPHY. JAMA. 1911;LVII(25):1986–1988. doi:10.1001/jama.1911.04260120176012
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