Method for removing plaque from blood vessels using ultrasonic energy
First Claim
1. A method for removing plaque from a blood vessel using an ultrasonic energy, comprising the steps of:
- inserting an ultrasonic probe into the blood vessel;
extending a portion of the ultrasonic probe to an area adjacent to the plaque on an inner surface of the blood vessel;
transmitting ultrasonic vibrations to the portion of the ultrasonic probe;
reducing the plaque to a particulate material by producing cavitation in a vicinity of the plaque.
5 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for removing plaque, fatty deposits, and other occlusions from blood vessels using ultrasonic energy. The method and apparatus has particular application in removing plaque from the carotid artery in a non-thermal manner. The apparatus is designed to have as small a cross-sectional profile as possible, therefore allowing the apparatus to be used in a minimally-invasive manner. As a result, the apparatus can be used in both surgical and outpatient treatment with minimal post-operative complications and minimal damage to areas other than the area of treatment. An ultrasonic probe may include aspiration channels on its outer surface. An aspiration sheath may surround the ultrasonic probe, such that the location of an aspiration port may be varied axially relative to the ultrasonic tip.
106 Citations
20 Claims
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1. A method for removing plaque from a blood vessel using an ultrasonic energy, comprising the steps of:
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inserting an ultrasonic probe into the blood vessel;
extending a portion of the ultrasonic probe to an area adjacent to the plaque on an inner surface of the blood vessel;
transmitting ultrasonic vibrations to the portion of the ultrasonic probe;
reducing the plaque to a particulate material by producing cavitation in a vicinity of the plaque. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for reducing plaque in a blood vessel comprising:
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providing a flexible member comprising a proximal end, a distal end and a longitudinal axis between the proximal end and the distal end;
inserting the flexible member into the blood vessel;
moving the flexible member in the blood vessel and placing the flexible member in communication with the plaque; and
providing an ultrasonic vibration to the flexible member, creating a transverse ultrasonic vibration along at least a portion of the longitudinal axis of the flexible member with a plurality of anti-nodes along the flexible member. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for removing a fatty deposit from a carotid artery comprising:
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providing an ultrasonic probe comprising a proximal end, a distal end and a longitudinal axis between the proximal end and the distal end;
inserting the ultrasonic probe into the carotid artery;
moving the ultrasonic probe in the carotid artery and placing the ultrasonic probe in communication with the fatty deposit;
providing an ultrasonic vibration to the ultrasonic probe, creating a transverse ultrasonic vibration along at least a portion of the longitudinal axis of the ultrasonic probe with a plurality of anti-nodes along the ultrasonic probe; and
reducing the fatty deposit to a particulate material by producing an area of non-thermal cavitation in a vicinity of the fatty deposit. - View Dependent Claims (17, 18, 19, 20)
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Specification