Fluid cooled and perfused tip for a catheter

Details Fluid cooled and perfused tip for a catheter Fluid cooled and perfused tip for a catheter

1993-12-21

1995-10-31

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Infrared, visible light, ultraviolet, x-ray or electrical...

606 31, 606 46, A61M 2500

Patent

active

054625211

ABSTRACT:
The invention relates to an ablation catheter which controls the temperature and reduces the coagulation of biological fluids on a tip of a catheter, prevents the impedance rise of tissue in contact with the catheter tip, and maximizes the potential energy transfer to the tissue, thereby allowing an increase in the lesion size produced by the ablation. The ablation catheter includes a catheter body. The ablation catheter also includes a tip for monitoring electrical potentials, and applying electrical energy to a biological tissue. A fluid source is positioned at one end of the catheter for supplying a fluid flow through the catheter to the tip means. Passages are positioned within the tip in a variety of manners for directing the fluid flow through the tip means to the exterior surface of the tip to control the temperature and form a protective fluid layer around the tip. Monitoring structure is also positioned within the tip structure for measurement of the electrical potentials in a biological tissue. Ablation structure is also positioned within the tip for application of ablative energy to the biological tissue.

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Willkampf, F. H. et al., Radiofrequency Ablation with a Cooled Porous Electrode Catheter, Abstract, JACC, vol. 11, No. 2, p. 17A (1988).
Huang et al., Increase in the Lesion Size and Decrease in the Impedance Rise with a Saline Infusion Electrode Catheter for Radiofrequency (1989) Catheter Ablation, Abstract, Circulation, vol. 80, No. 4, pp. II-324.
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Dialog summary of abstracts and titles in the scientific and medical device databases, pp. 1-9.

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