The power of accurate determination of the reserve or repair ability of a hydronephrotic kidney is of considerable clinical importance. In hydronephrosis following incomplete obstruction, the most frequent clinical type, estimation of the damage as determined by the usual functional tests is often deceptive and unsatisfactory. With complete obstructions, the only trustworthy guide is the accuracy of our knowledge by clinical observation of how many days the total obstruction has existed; and with either type the evidence of repair, whether good or bad, as first found on relief of obstructions, may be totally different in degree and kind in the course of several years afterward.
The significance of the difference in the early and late changes following relief of obstructions of equal duration, when the opposite kidney is undisturbed, has been emphasized by one of us 1 in several previous publications, and is best understood in comparison with the repair
HINMAN F, BUTLER OW. REPAIR IN HYDRONEPHROSIS: WITH REFERENCE PARTICULARLY TO EARLY AND LATE CHANGES AFTER RELIEF OF BRIEF OBSTRUCTIONS WHEN OPPOSITE KIDNEY IS NOT DISTURBED. JAMA. 1923;81(24):2021–2023. doi:10.1001/jama.1923.02650240025009
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