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US 2013/0172989 A1Published application
Methods for measuring body orifice
AssigneeEdwards Lifesciences Corporation
InventorsLouis A. Campbell, Travis Zenyo Oba, Rafael Pintor
Life of this patent
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Abstract
A device for measuring an expanded internal orifice of a patient includes an orifice-expanding device, a pressure measuring device, and a size-measuring device. The size-measuring device measures a dimension of the orifice after it has been expanded by the orifice-expanding device.
Claims23
A method of sizing a heart valve annulus for implant of a prosthetic heart valve, comprising:
- accessing a patient's heart valve annulus;
- placing an orifice-expanding device of a sizing apparatus into the orifice, the orifice-expanding device having a plurality of expanding portions distributed around a distal end of the sizing apparatus;
- radially expanding the orifice-expanding device to cause it to exert a desired outward radial pressure against the annulus and cause the annulus to expand;
- and
- determining a dimension of the expanded annulus while the orifice-expanding device is in the expanded annulus without using a calculation based on the pressure exerted by the orifice-expanding device.
2 more elements
A method of sizing a heart valve annulus for implant of a prosthetic heart valve, comprising:
- accessing a patient's heart valve annulus;
- placing an orifice-expanding device of a sizing apparatus into the annulus;
- radially expanding the orifice-expanding device to a desired pressure against the annulus such that the annulus expands, the desired pressure corresponding to a target physiological blood pressure in the systolic and diastolic cycle;
- and
- determining a dimension of the expanded annulus while the orifice-expanding device is in the expanded annulus.
2 more elements
A method of sizing a heart valve annulus for implant of a prosthetic heart valve, comprising:
- advancing a distal end of an elongated sizing apparatus into the annulus while holding a proximal end;
- radially expanding a patient's heart valve annulus by exerting a desired pressure on the annulus with the distal end of the sizing apparatus which is equal to a target physiological blood pressure in the systolic and diastolic cycle;
- and
- while the distal end of the sizing apparatus is in the expanded annulus, observing a visual indicator on the proximal end of the sizing apparatus that shows the size of the annulus when the desired pressure has been reached.
1 more element
Dependencies are inferred from the claim text.