| 摘要 |
A ureteral drainage stent is designed to be placed in a patient's ureter and extend into a patient's bladder. An elongated tubular segment includes a distal retention structure for placement in the renal cavity, and a proximal retention structure constructed at least partly from a foam material and for placement in a urinary bladder. A central lumen connects at least one opening in the distal retention structure to the foam proximal retention structure. The foam proximal retention structure typically extends along at least a lower part of the ureter, across the ureteral-vesical junction, and into the bladder, to provide drainage through multiple networked channels.
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