Single-lumen balloon catheter having a directional valve
First Claim
1. A single-lumen balloon catheter assembly comprising a catheter body having proximal and distal ends, a single lumen extending between those proximal and distal ends, an inflatable balloon having proximal and distal ends disposed in the distal region of the catheter body, a valve seat disposed between the distal end of the inflatable balloon and the distal end of the catheter body, which valve seat is formed by a circumferential band cinching a portion of the catheter body forming distal and proximal valve surfaces, and allows passage of a control wire therethrough, and is adapted to engage and seal said lumen, both on its distal and proximal valve surfaces, with a valve plug disposed on a control wire.
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Accused Products
Abstract
This invention is a single-lumen balloon catheter having a valve seat on the distal end of the catheter, distal of the balloon, which may be operated by a control wire having a valve plug disposed on the wire. The valve seat may be engaged by the valve plug from either direction, depending on the installation of the control wire. In either event, if the valve plug is installed distally of the valve seat in the catheter lumen, the valve is closed by pulling on the control wire (or moving the control wire in a proximal direction) and introducing fluid through the catheter lumen through the balloon. Alternatively, the guidewire, with its integral valve plug, may be introduced from the proximal end of the catheter and may traverse the body of the balloon to engage the valve seat in the distal end of the catheter. Pushing on the control wire will seat the valve, allowing the introduction of fluid through the catheter lumen to inflate the balloon. The latter arrangement allows the control wire to be interchanged with other guidewires a physician may wish to use. The balloon provided for in this invention is of a single length and does not change its axial length as it is inflated.
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Citations
24 Claims
- 1. A single-lumen balloon catheter assembly comprising a catheter body having proximal and distal ends, a single lumen extending between those proximal and distal ends, an inflatable balloon having proximal and distal ends disposed in the distal region of the catheter body, a valve seat disposed between the distal end of the inflatable balloon and the distal end of the catheter body, which valve seat is formed by a circumferential band cinching a portion of the catheter body forming distal and proximal valve surfaces, and allows passage of a control wire therethrough, and is adapted to engage and seal said lumen, both on its distal and proximal valve surfaces, with a valve plug disposed on a control wire.
Specification