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US 12,661,176 B2Granted
Catheter with flow balancing valve
AssigneeBiosense Webster (Israel) Ltd.
InventorsJeffrey W. Schultz, Michael Olen Zirkle
Life of this patent
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Abstract
A catheter has at least two irrigated ablation electrodes and a coaxial irrigation tubing to transport fluid to the electrodes by separate and dedicated flow paths. A valve is used to control flow of fluid into the coaxial irrigation tubing by means of a plunger assembly that allows fluid to flow through one lumen of the coaxial irrigation tubing while regulating the flow into the other lumen of the coaxial irrigation tubing in response to the fluid flow rate and pressure applied to the plunger assembly.
Claims19
A valve for use with a catheter irrigation tubing, comprising:
- a body defining an inlet opening, an outlet opening and an interior cavity connecting the inlet opening and the outlet opening, the inlet opening adapted to receive fluid flow at a selected flow rate;
- a plunger assembly situated in the interior cavity, the plunger assembly having:
- a plunger head;
- a base comprising one or more openings through which fluid can pass;
- a spring member supporting the plunger head from the base at a predetermined position relative to the inlet opening;
- and
- a first lumen passing through the plunger head and the base,
- the body defining first and second fluid flow paths, the first fluid flow path including the first lumen and excluding the interior cavity, and the second fluid flow path including the interior cavity and excluding the first lumen, the first fluid flow path receiving a first portion of a flow entering the valve via the inlet opening, the second fluid flow path receiving a second portion of the flow entering the valve via the inlet opening,
- the spring member being configured to allow displacement of the plunger head relative to the inlet opening when the flow rate exceeds a threshold flow rate to vary at least one of the first and second portions of the flow received by the first and second fluid flow paths.
6 more elements
Dependencies are inferred from the claim text.