Cryoablation catheter and method of performing cryoablation
First Claim
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1. A method of cryogenically ablating a predetermined portion of tissue within a blood vessel of a patient, comprising the steps of:
- inserting a catheter having a tip portion into the lumen of the blood vessel;
guiding said catheter to a predetermined portion of the patient'"'"'s body and positioning said tip portion adjacent tissue within the lumen of the blood vessel to be ablated;
directing a flow of cryogenic fluid to said tip portion;
effecting a cooling of said cryogenic fluid adjacent said tip portion; and
removing said fluid from said tip portion.
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Abstract
A method and apparatus is provided for cryogenically ablating a predetermined portion of tissue in the body of a patient. Cryoablation is accomplished by a cryoblation catheter having a hollow shaft insertable into the blood vessel of a patient. The shaft has a closed tip portion and a fluid flow passage for directing a flow of cryogenic fluid to the tip. Cryogenic cooling is effected by a liquid-to-gas fluid phase change adjacent the catheter tip. Electrical signal activity may be monitored by an electrode formed integral with the tip to confirm treatment of the paper tissue site.
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Citations
6 Claims
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1. A method of cryogenically ablating a predetermined portion of tissue within a blood vessel of a patient, comprising the steps of:
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inserting a catheter having a tip portion into the lumen of the blood vessel; guiding said catheter to a predetermined portion of the patient'"'"'s body and positioning said tip portion adjacent tissue within the lumen of the blood vessel to be ablated; directing a flow of cryogenic fluid to said tip portion; effecting a cooling of said cryogenic fluid adjacent said tip portion; and removing said fluid from said tip portion. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification