| 摘要 |
The lasting withdrawable ureteral prosthesis has a hollow tubular frame formed by a coiled biotolerable metallic wire including a number of closely contacting spires, at least a portion of which permit an easy flow of urine from an inside region to an outside region and from the outside region to the inside region of the hollow tubular frame, and a thin internal metallic wire, which is fastened, preferably by welding, to the three or four last spires at both ends of the tubular frame to prevent elastic elongation of the prosthesis. The internal metallic wire has hook-shaped internal wire ends in an undeformed configuration, and, after it is deformed from its undeformed configuration, returns immediately to the undeformed configuration to form the J-shaped curved ends of the hollow tubular frame one of which can occupy the pelvis of the kidney and the other, the urinary bladder of the patient. Furthermore an auxiliary metallic rod, which is much longer than the urethral prosthesis and which has a soft noninjurious end portion, can be inserted in the interior of the tubular frame of the ureteral prosthesis to keep the prosthesis straight during introduction into the patient.
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