Vascular system steerable guidewire with inflatable balloon
First Claim
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1. For use in the vascular system a steerable guidewire/balloon apparatus comprising in combination:
- a. a length of flexible tubing having proximal and distal ends and interior and exterior walls and providing torsional, axial and radial rigidity;
b. an inflatable balloon disposed about the exterior circumference of said tubing at said distal end, said tubing having a passageway between said interior and exterior walls for admitting fluid to said balloon;
c. a flexible axially moveable core member disposed within and along the length of said tubing; and
d. valve means disposed within said tubing forward of said passageway comprising a valve seat attached to said tubing and a ball valve member slidably mounted on said moveable core for containing said fluid within said tubing and selectively directing said fluid into said passageway and said balloon by sealing said valve means by fluid pressure.
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Abstract
A dilatation steerable guidewire for use in the vascular system having an inflatable balloon at the distal end and a bi-directional fluid pressure actuated ball valve forward of the balloon position. The guidewire construction provides torque and direction for manipulating the guidewire through the anatomy while the valve regulates fluid emission from the tip of the guidewire for visualization or into the balloon for inflation and deflation and is originated by fluid pressure.
93 Citations
6 Claims
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1. For use in the vascular system a steerable guidewire/balloon apparatus comprising in combination:
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a. a length of flexible tubing having proximal and distal ends and interior and exterior walls and providing torsional, axial and radial rigidity; b. an inflatable balloon disposed about the exterior circumference of said tubing at said distal end, said tubing having a passageway between said interior and exterior walls for admitting fluid to said balloon; c. a flexible axially moveable core member disposed within and along the length of said tubing; and d. valve means disposed within said tubing forward of said passageway comprising a valve seat attached to said tubing and a ball valve member slidably mounted on said moveable core for containing said fluid within said tubing and selectively directing said fluid into said passageway and said balloon by sealing said valve means by fluid pressure. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification