但是循环到血液中会被肾屏蔽，积聚起来的血红蛋白阻塞了肾小管，严重时对肾脏造成永久性伤害。
Once released into the blood, it is filtered by the kidney, where it accumulates, blocks microscopic tubules and damages the organ, sometimes permanently.
图示：肾盂积水(由长期尿路阻塞引起)致肾盂肾盏明显扩张。
The renal pelvis and calyces show marked dilation, consistent with hydronephrosis, the result of chronic urinary tract obstruction.
大的肾结石阻塞了肾脏下极的肾盏，导致了局部的肾盂积水。
There was a large renal calculus (stone) that obstructed the calyces of the lower pole of this kidney, leading to a focal hydronephrosis (dilation of the collecting system).
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