Irrigated catheter with improved fluid flow
First Claim
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1. A catheter comprising:
- a distal end;
a proximal end;
a longitudinal axis;
a lumen that includes a first segment having a first inner diameter and a second segment having a second inner diameter that is different from the first inner diameter;
an electrode coupled to the distal end and having a terminal end;
a sidewall defining a plurality of elution openings including a first elution opening and a second elution opening longitudinally spaced apart from the first elution opening, each of the first elution opening and the second elution opening spaced from the terminal end and extending into the sidewall, wherein the plurality of elution openings are proximal of said terminal end; and
a plurality of ducts including a first duct and a second duct, the first duct extending at a first angle with respect to the longitudinal axis and between the first segment and the first elution opening, the second duct extending at the first angle with respect to the longitudinal axis and between the second segment and the second elution opening.
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Abstract
An irrigated catheter with uniform cooling and/or uniform fluid distribution in longitudinally spaced apart elution holes by varying the diameter of a fluid delivery lumen. A number of elution holes are provided in a tip region of a catheter body, and these elution holes are in fluid communication with the lumen through ducts. The fluid delivery lumen may be provided with a flow constrictor to restrict flow of fluid towards the distal region.
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Citations
17 Claims
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1. A catheter comprising:
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a distal end; a proximal end; a longitudinal axis; a lumen that includes a first segment having a first inner diameter and a second segment having a second inner diameter that is different from the first inner diameter; an electrode coupled to the distal end and having a terminal end; a sidewall defining a plurality of elution openings including a first elution opening and a second elution opening longitudinally spaced apart from the first elution opening, each of the first elution opening and the second elution opening spaced from the terminal end and extending into the sidewall, wherein the plurality of elution openings are proximal of said terminal end; and a plurality of ducts including a first duct and a second duct, the first duct extending at a first angle with respect to the longitudinal axis and between the first segment and the first elution opening, the second duct extending at the first angle with respect to the longitudinal axis and between the second segment and the second elution opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An irrigated electrode catheter comprising:
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a longitudinal axis; a sidewall; a distal region having a fluid delivery lumen defined by an inner surface of the sidewall, the lumen including a first segment having a first inner diameter and a second segment having a second inner diameter that is about 5% to about 40% smaller than the first inner diameter; and at least one electrode at the distal region and including a plurality of longitudinally spaced apart ducts including a first duct and a second duct, the first duct extending at a first angle with respect to the longitudinal axis and from the first segment to the sidewall, the second duct extending at the first angle with respect to the longitudinal axis and from the second segment to the sidewall. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification