Ureteral stent-catheter having varying internal diameter and method of use
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United States of America Patent
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-
Nov 15, 1994
Issued Date -
N/A
app pub date -
Jul 2, 1993
filing date -
Jan 25, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tubular flexible stent, a combination of stent-catheter, and method thereof, comprises a flexible tubular drain passage segment and a flexible tubular ureteral catheter receiving segment which is collinearly integral with the passage segment. The stent is formed with a curl at each end of the drain passage segment and the catheter receiving segment. The outer width of the catheter receiving segment is same or slightly larger than that of the drain passage segment. The inner width of the catheter receiving segment is larger than that of the drain passage segment. The length of the drain passage segment is substantially longer than that of the catheter receiving segment. A rigid ureteral catheter is inserted into the receiving segment to straighten the preformed curl formed therein and a stiffening wire is passed through the catheter and the stent to straighten the curl formed in the drain passage segment. A rigid tube is slid over the catheter and abutted against the free end of the receiving segment to pull the catheter out of the stent.
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