Image-guided heart valve placement
First Claim
1. A method for determining whether a replacement heart valve is appropriate for implanting in a section of a heart of a patient into which the replacement heart valve is to be implanted, the method comprising:
- inserting an expandable distal end portion of a sizing device into the section of the heart of the patient into which the replacement heart valve is to be implanted, wherein selective expansion of the distal end portion of the sizing device applies a selected radial force to the section of the heart, wherein the selective expansion of the distal end portion simulates at least one property of the replacement heart valve in a deployed state;
imaging the section of the heart while the distal end portion of the sizing device in an expanded state applies a radial force to the section of the heart during heart rhythm; and
reimaging the section of the heart while the distal end portion of the sizing device in a contracted state does not apply the radial force to the section of the heart during heart rhythm;
deriving, from the imaging and the reimaging, dimensional characteristics of the section of the heart based on images of the distal end portion of the sizing device applying and not applying the radial force to the section of the heart; and
determining whether the replacement heart valve is appropriate for implantation in the section of the heart based on the derived dimensional characteristics of the section of the heart.
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Accused Products
Abstract
A method for determining whether a medical device is appropriate for implanting into a cardiovascular conduit of a patient is disclosed comprising imaging a first section of the conduit of the patient into which the medical device is to be implanted during a first expanded state occurring at a first portion of a heart rhythm; reimaging the first section of the conduit of the patient during a first contracted state occurring at a second portion of the heart rhythm; deriving, from the imaging and the reimaging, dimensional characteristics of the first section of the conduit; and determining whether the medical device is appropriate for implantation in the first section of conduit based on the derived dimensional characteristics. The first section of the conduit includes a sizing device providing a selected radial force on the patient.
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Citations
22 Claims
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1. A method for determining whether a replacement heart valve is appropriate for implanting in a section of a heart of a patient into which the replacement heart valve is to be implanted, the method comprising:
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inserting an expandable distal end portion of a sizing device into the section of the heart of the patient into which the replacement heart valve is to be implanted, wherein selective expansion of the distal end portion of the sizing device applies a selected radial force to the section of the heart, wherein the selective expansion of the distal end portion simulates at least one property of the replacement heart valve in a deployed state; imaging the section of the heart while the distal end portion of the sizing device in an expanded state applies a radial force to the section of the heart during heart rhythm; and reimaging the section of the heart while the distal end portion of the sizing device in a contracted state does not apply the radial force to the section of the heart during heart rhythm; deriving, from the imaging and the reimaging, dimensional characteristics of the section of the heart based on images of the distal end portion of the sizing device applying and not applying the radial force to the section of the heart; and determining whether the replacement heart valve is appropriate for implantation in the section of the heart based on the derived dimensional characteristics of the section of the heart. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for determining an appropriate replacement heart valve for implanting in a heart of a patient, the method comprising:
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inserting an expandable distal end portion of a sizing device into a section of the heart of the patient into which the replacement heart valve is to be implanted, wherein the distal end portion of the sizing device is configured to apply a selected radial force from a variable radial force to the section of the heart; imaging the section of the heart including the distal end portion of the sizing device in a selected expanded state during heart rhythm, wherein the distal end portion of the sizing device in the selected expanded state simulates at least one property of a replacement heart valve in a deployed state and the selected expanded state applies a selected radial force to the section of heart; reimaging the section of the heart including the distal end portion of the sizing device in a contracted state during heart rhythm; deriving, from the imaging and the reimaging, dimensional characteristics of the section of the heart based on images of the distal end portion of the sizing device applying and not applying the selected radial force to the section of the heart; and selecting a replacement heart valve for implantation in the section of the heart based on the derived dimensional characteristics. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for determining whether a heart valve prosthesis is appropriate for implanting in a heart of a patient, comprising:
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inserting an expandable distal end portion of a sizing device into a section of the heart of the patient, wherein a selected expansion of the distal end portion of the sizing device applies a selected radial force to the section of the heart of the patient; imaging the section of the heart of the patient including the distal end portion of the sizing device in a selected expanded state during heart rhythm; reimaging the section of the heart of the patient including the distal end portion of the sizing device in a selected contracted state during heart rhythm; deriving, from the imaging and the reimaging, dimensional characteristics of the section of the heart; and determining whether the heart valve prosthesis is appropriate for implantation in the section of the heart based on the selected radial force and the derived dimensional characteristics. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification