Heart valve sizing ring for valve-sparing aortic root remodeling procedures

Abstract

A heart valve sizing ring is disclosed. The sizing ring includes an outer ring and an inner ring configured and arranged to couple to the outer ring. A tubular portion extends from the inner ring and has a plurality of suture holders arranged about an upper end thereof. The outer ring and inner ring having a pair of complementary mating surfaces configured and arranged to grip sutures therebetween when coupled together. When coupled around sutures, the assembled ring may be tightened down against the heart valve to test the fit as if the sizing ring were a similarly sized prosthetic heart valve ring. Commissures of the heart valve may be suspended from the suture holders of the tubular portion. The surgeon can then remove the sizing ring and replace it with a prosthetic ring.

Description

BACKGROUND OF THE INVENTION

1. Technical Field

The present patent document relates generally to heart valve sizing rings and more particularly to a heart valve sizing ring configured for valve-sparing aortic root remodeling procedures.

2. Background of the Related Art

Referring to FIGS. 1 and 2, during valve-sparing aortic root remodeling procedures sutures 14 are aligned at the base of the heart valve 10. The aortic wall is resected and sculpted to preserve three anchor points for the heart valve where the leaflets 12 meet, i.e. the commissures 16. Sutures 18 are placed above the commissures 16. The sutures 14 at the base of the valve 10 are used to anchor the graft to the heart and to stabilize (and often “downsize”) the aortic root. The sutures 18 above the commissures 16 are anchored to the upper “tube” portion of the graft where they are positioned high enough to allow the commissures 16 to be “resuspended” helping to correct geometry of the valve 10.

However, if the correct graft size is not selected during the repair, the surgeon may not be able to properly reshape the valve 10, thereby leading prolonged and/or suboptimal surgical operations which could lead to complications and poor outcomes.

Therefore, there is a perceived need in the industry for a method and device to allow a surgeon to easily size and test a valve repair in valve-sparing aortic root remodeling procedures.

SUMMARY OF THE INVENTION

The present invention solves the problems of the prior art by providing a heart valve sizing ring system that includes and outer ring and an interlocking inner ring. The inner ring further includes a tubular portion that can be used to test and simulate whether the heart valve has been properly sized prior to installing a permanent graft prosthesis. The tubular portion may additionally include suture holders at the top to aid the surgeon in recreating valve geometry and function by “suspending” the commissures within the tubular portion thus assisting with evaluation/testing of proper graft/valve size selection.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages of the present invention will become better understood with reference to the following description, appended claims, and accompanying drawings where:

FIG. 1 shows an aortic heart valve with sutures being installed at the base of the valve;

FIG. 2 shows an aortic heart valve after excess and/or diseased aortic tissue has been resected using a technique that preserves the valve itself. More sutures are placed circumferentially;

FIG. 3 shows the heart valve sizing system supporting the heart valve therein for testing the size of the graft prior to placement; and

FIG. 4 shows a partial cross-section of a suture being trapped between the inner ring and the outer ring.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring now to FIGS. 3 and 4, a first embodiment of the heart valve sizing ring is shown generally over a heart valve that has been resected and sculpted at 100. The heart valve sizing ring 100 includes an outer ring 102, and inner ring 104 that interlocks with the outer ring 102, and a tubular portion 106 (simulating a graft) extending from the inner ring 104.

Sutures 14 at the base of the heart valve 10 are captured between the inner and outer rings 102,104, thereby temporarily anchoring the heart valve sizing ring 100 to the heart valve 10. The inner and outer rings 102, 104, may include a concave and convex surfaces 102a, 104b, to facilitate retention of the sutures 14. The surfaces may optionally be coated with a rubber-type of coating to gently grip the sutures and prevent slipping. Because the inner and outer rings 102, 104 form a rigid structure, the precise size of the annular diameter is provided during evaluation.

The valve commissures 16 are suspended temporarily using the suture holders 108, such as slots, via the commissure sutures 18. This allows for the valve leaflet 12 distance and apposition to be properly evaluated by creating a “quick preview” of what valve function would be like should a graft of that size be selected. Several different graft sizes can be tested and compared in a relatively short time prior to final graft selection. Note that this system can be used with either a “straight” tube graft or with a “Valsalva” type of tube graft (in which the sides of the graft “bow” outward slightly).

The pictured slots as suture holders 108 represent one embodiment that may facilitate commissural suspension, though, this could be accomplished by other mechanisms as well, such as clipping the commissure sutures 18 to the tube wall, etc. The material of the tubular portion 106 is not restricted and can be made of a stiffer material than the graft prosthesis if it is only being used for sizing purposes. The slots 108 can have an additional rubber-type of coating or some other material that is advantages in gently gripping and holding the commissure sutures 18.

It would be appreciated by those skilled in the art that various changes and modifications can be made to the illustrated embodiments without departing from the spirit of the present invention. All such modifications and changes are intended to be within the scope of the present invention.

Claims

1. A method of sizing a heart valve, comprising: providing a heart valve sizing ring having an inner ring and an outer ring snap-receivable together, the inner ring further comprising tubular portion extending therefrom, the tubular portion having an upper end with a plurality of suture holds spaced thereabout;corralling the sutures within an outer ring;organizing the sutures within the outer ring;inserting an inner ring into the outer ring, trapping the sutures between the inner ring and the outer ring; andsuspending commissures within the tubular portion via the plurality of suture holders on the upper end of the tubular portion.

2. The method of claim 1, further comprising tightening the heart valve sizing ring against the heart valve.

3. The method of claim 1, further comprising checking the heart valve for an adequate fit.

4. The method of claim 1, further comprising replacing the heart valve sizing ring with a prosthetic heart valve ring.

5. The method of claim 1, wherein the step of corralling the sutures within the outer ring comprises gathering the sutures through a gap formed in the outer ring to an interior portion of the outer ring.

6. The method of claim 1, further comprising adjusting the sutures suspending the commissures.