Balloon design to enhance cooling uniformity
First Claim
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1. A medical device comprising:
- an expandable element including an interior wall, an exterior wall, an adjustable distal neck, and a fixed proximal neck;
a disk-shaped fluid distribution membrane disposed within the expandable element so as to divide the expandable element into a first portion that is distal to the fluid distribution membrane and a second portion that is proximal to the fluid distribution membrane, the fluid distribution membrane including a plurality of apertures proximate at least a portion of the interior wall that allow the transit of fluid from the first portion to the second portion; and
a fluid injection element within the first portion,the expandable element having a first shape when the distal neck is oriented outward and away from the expandable element, and a second shape when the distal neck is oriented inward and within the expandable element.
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Abstract
A device, system, and method for enhancing cooling uniformity and efficiency of cryogenic fluids and providing a treatment element the shape of which can be adjusted for multiple purposes. The device may include a balloon catheter and fluid dispersion element, the fluid dispersion element directing the flow of coolant from a fluid injection element the interior wall of the balloon. The method of changing the shape of the treatment element may include retracting and extending a shaft to which the distal neck of a balloon is coupled, so that the balloon goes from a first shape to a second shape.
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Citations
18 Claims
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1. A medical device comprising:
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an expandable element including an interior wall, an exterior wall, an adjustable distal neck, and a fixed proximal neck; a disk-shaped fluid distribution membrane disposed within the expandable element so as to divide the expandable element into a first portion that is distal to the fluid distribution membrane and a second portion that is proximal to the fluid distribution membrane, the fluid distribution membrane including a plurality of apertures proximate at least a portion of the interior wall that allow the transit of fluid from the first portion to the second portion; and a fluid injection element within the first portion, the expandable element having a first shape when the distal neck is oriented outward and away from the expandable element, and a second shape when the distal neck is oriented inward and within the expandable element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for enhancing the efficiency of a medical device for cooling tissue, the method comprising:
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providing an expandable element having a longitudinal axis, an interior wall, an exterior wall, a fixed proximal neck, an adjustable distal neck, and a fluid distribution element disposed within the expandable element so as to divide the expandable element into a first portion and a second portion, the fluid distribution element lying in a plane that is at least substantially orthogonal to the longitudinal axis of the expandable element, the fluid distribution element having an outer edge that is in contact with the interior wall of the expandable element, the adjustable distal neck being coupled to a slidably movable sheath, the expandable element having a first shape when the sheath is in an extended position and having a second shape when the sheath is in a retracted position; injecting coolant through a fluid injection element within the first portion, the fluid distribution element guiding coolant toward the interior wall of the first portion, through the fluid distribution element, and into the second portion. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification