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To the Editor:—
I appreciate Drs. Dine and Shuster's interest in "Renal Papillary Necrosis" (210: 1098, 1969) and concur in the use of DIP prior to retrograde pyelography. This roentgenographic technique has decreased the need for retrogrades in many instances. I have employed DIP in the past five to six years with often surprisingly good results.Our enthusiasm, however, in patients with BUN values greater than 100 mg/100 ml has not paralleled that of Drs. Dine and Shuster as pyelographic detail with nonopaque filling defects is best demonstrated with retrograde pyelograms in our hands.
Hellebusch AA. Retrograde Pyelography In Azotemia. JAMA. 1970;212(8):1377. doi:10.1001/jama.1970.03170210081025
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