Device to steer into subintimal false lumen and parallel park in true lumen
OwnerEdgar Louis Shriverinventor
Life of this patent
Estimating the term…
Abstract
A device for steering J-tip guidewire through true lumen of artery to puncture site where an occlusion abuts artery wall and stylet wire in lumen of J-tip guidewire provides axis for screwing it between intimal and medial layers of artery wall and stiffens it sufficiently to transform J-tip to loop that dissects a false lumen between intimal and medial layers around occlusion to its end where tamping balloons push aside intimal layer and occlusion so false lumen and true lumen coincide allowing intimal layer to be safely pierced by stylet wire allowing blood flow through previously occluded artery segment.
Claims7
A device for steering J-tip guidewire in artery true lumen to puncture site at an occlusion where stylet wire punctures intimal layer and stiffens J-tip guidewire to form loop that dissects a false lumen between intimal and medial layers around occlusion and tamping balloons push aside intimal layer and occlusion causing false lumen and true lumen to coincide thus allowing intimal layer to be safely pierced for blood to flow, comprising,
- a. a J-tip guidewire made of wire coiled on a mandrel having a proximal end, a distal end and lumen therebetween, with distal end biased in shape of a J, and
- b. a stylet wire having a proximal end, a distal end with straight wire therebetween of size to slide in lumen of said J-tip guidewire and having a sharp distal end, and
- c. a tamping catheter having a distal end, proximal end and lumen therebetween being slidably larger than said J-tip guidewire, and
- d. tamping balloons made of a combination of compliant and non-compliant material with distal tamping balloon mounted on said distal end of said tamping catheter having a separate fluid supply line from a plurality of tamping balloons mounted proximally to said distal tamping balloon having a common fluid supply line,
- whereby said stylet wire is advanced beyond said distal end of said J-tip guidewire to puncture said intimal layer of artery wall at intimal puncture site, provide axis for rotation of J-tip guidewire through said intimal puncture, provide stiffening that causes J-tip guidewire to form the proper size loop that dissects a false lumen between said intimal and said medial layers of said artery wall around said occlusion where said distal tamping balloon on said distal end of said tamping catheter, being partially made of compliant material, is inflated causing false lumen to be pushed into true lumen with approximate parallel alignment of their axes so said stylet wire can be safely advanced to pierce said intimal layer stretched in front of said distal tamping balloon, and said plurality of tamping balloons, being partially made of non-compliant material which resists damage when quickly pushing aside occlusion wrapped in said intimal layer whereupon said device is removed from body with possible exception of J-tip guidewire which may be needed for a subsequent procedure.
Dependencies are inferred from the claim text.