Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1993-03-19
1994-07-12
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604165, 606194, A61M 2900, A61M 5178
Patent
active
053284690
ABSTRACT:
A instrument and method for effecting the dilatation of an artery. The instrument comprises a catheter and an expandable balloon. The catheter includes first and second lumens extending longitudinally therethrough and in communication with respective portions of the balloon. The balloon is an everted member having a cylindrical outer wall and a cylindrical inner wall disposed within the outer wall. The inner wall has a central passageway extending therethrough communicating with the first lumen through which a conventional guide wire may be extended. The inner wall of the balloon is collapsible radially inward, e.g., upon the application of a vacuum to the first lumen, whereupon it frictionally engages the guide wire to prevent relative movement therebetween and to enable the instrument and guide wire to be moved as a unit. The outer wall of the balloon is collapsible radially inward, e.g., upon the application of a vacuum to the second lumen, so that its cross-sectional area is less than that of the catheter to facilitate the introduction of the balloon into a restriction, a stenosed area, in the artery. The outer wall of the balloon is also movable radially outward by introducing a pressurized fluid into the annular space in the balloon member via the second lumen to effect the dilatation of the stenosed artery. A cylindrical, radio-opaque stent may be located within the balloon between the inner and outer walls thereof.
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Rosenbaum C. Fred
Wilkens Frank
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