Sizing device and method of positioning a prosthetic heart valve
First Claim
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1. A sizing device for use in implanting a collapsible prosthetic heart valve in a native valve annulus, the sizing device comprising:
- a collapsible and expandable stent having an annulus section at a first end with a first diameter and an aortic section at a second end with a second diameter, the second diameter being greater than the first diameter, and the first end and the second end being disposed at opposite sides of the stent; and
a sensor coupled to the annulus section adjacent the first diameter of the stent, the sensor comprising at least one deflectable contacting member, and being capable of collecting information related to stiffness of the native valve annulus by contacting portions of the native valve annulus with the at least one deflectable contacting member.
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Abstract
A sizing device for a collapsible prosthetic heart valve includes a collapsible and expandable stent. A microelectromechanical sensor is coupled to the stent, the sensor being capable of collecting information related to the size and stiffness of tissue.
172 Citations
21 Claims
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1. A sizing device for use in implanting a collapsible prosthetic heart valve in a native valve annulus, the sizing device comprising:
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a collapsible and expandable stent having an annulus section at a first end with a first diameter and an aortic section at a second end with a second diameter, the second diameter being greater than the first diameter, and the first end and the second end being disposed at opposite sides of the stent; and a sensor coupled to the annulus section adjacent the first diameter of the stent, the sensor comprising at least one deflectable contacting member, and being capable of collecting information related to stiffness of the native valve annulus by contacting portions of the native valve annulus with the at least one deflectable contacting member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for determining the fitment of a prosthetic heart valve within a native valve annulus, comprising:
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introducing a sizing device into the native valve annulus, the sizing device including (i) a collapsible and expandable stent having an annulus section at a first end with a first diameter and an aortic section at a second end with a second diameter, the second diameter being greater than the first diameter, and the first end and the second end being disposed at opposite sides of the stent and (ii) a sensor coupled to the annulus section of the stent, the sensor comprising at least one deflectable contacting member, and being capable of collecting information related to the native valve annulus by contacting portions of the native valve annulus with the at least one deflectable contacting member; expanding the diameter of the stent within the native valve annulus; and acquiring information related to the native valve annulus via the sensor by contacting portions of the native valve annulus with the at least one deflectable contacting member of the sensor. - View Dependent Claims (15, 16, 17, 18)
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19. A method for determining the fitment of a prosthetic heart valve within a native valve annulus, comprising:
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introducing a sizing device into the native valve annulus, the sizing device including (i) a collapsible and expandable stent having an annulus section and an aortic section, and (ii) a sensor coupled to the annulus section of the stent, the sensor comprising at least one deflectable contacting member, and being capable of collecting information related to the native valve annulus by contacting portions of the native valve annulus with the at least one deflectable contacting member; expanding the diameter of the stent within the native valve annulus by rotating a first portion of a deployment device relative to a second portion of the deployment device within the native valve annulus; acquiring information related to the native valve annulus via the sensor by contacting portions of the native valve annulus with the at least one deflectable contacting member of the sensor; and expanding the diameter of the stent in-vitro to establish a relationship between the number of rotations of the first portion of the deployment device relative to the second portion of the deployment device and a diameter of the stent. - View Dependent Claims (20)
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21. A method for determining the fitment of a prosthetic heart valve within a native valve annulus, comprising:
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introducing a sizing device into the native valve annulus, the sizing device including (i) a collapsible and expandable stent having an annulus section and an aortic section and at least two diameters and (ii) a sensor coupled to the annulus section of the stent, the sensor comprising at least one deflectable contacting member, and being capable of collecting information related to the native valve annulus by contacting portions of the native valve annulus with the at least one deflectable contacting member; acquiring information related to the native valve annulus via the sensor by contacting portions of the native valve annulus with the at least one deflectable contacting member of the sensor; and expanding the diameter of the stent within the native valve annulus by rotating a first portion of a deployment device relative to a second portion of the deployment device within the native valve annulus until the sensor measures a radial force of a predetermined value.
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Specification