Ureteric stone extractor with two ballooned catheters
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United States of America Patent
Stats
-
Oct 20, 1981
Grant Date -
N/A
app pub date -
Mar 21, 1980
filing date -
Mar 21, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ureteric stone extractor (100) is disclosed wherein an inner dislodger catheter (101) is slidable within a relatively larger outer dialator catheter (102). The dislodger catheter (101) comprises a lumen (104) having a stiffening metal stylet (106) therein to allow it to easily pass beyond a stone arrested within a ureter. A dislodger balloon (107) is eccentrically attached to the inner catheter (101) and can be inflated once the inner catheter (101) is positioned above and beyond the arrested stone. Nylon strings (110) positioned along longitudinal axes of the dislodger balloon (107) are manipulable by an attending physician to ensure that the dislodger catheter (101) and the strings (110) entrap the stone and to apply a downward force by the dislodger balloon (107) to the stone sufficient to dislodge it from the ureteral walls. The outer dilator catheter (102) has a cylindrical dilator balloon (113) attached thereto to effect distension and dilation of the ureter below the arrested stone, thereby providing a sufficient spacial area into which the stone can be moved.
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