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A: Inner ring diameter B: Outer ring diameter C: Inner stiffener diameter |
Annuloplasty
SimuForm™ annuloplasty ring
<p>The SimuForm™ annuloplasty ring has a flexible segment designed to accommodate anterior motion, while the semi-rigid posterior segment enables remodeling.</p>
Features
Hybrid shape
- The mitral valve annulus changes shape in the cardiac cycle. SimuForm™ rings do not have a fixed saddle shape; instead, they change shape in systole and diastole.
- SimuForm™ rings are available in a full size range of 24–40 mm.
Elevated saddle shape in systole
- The flexible anterior portion accommodates natural motion.
- The saddle has been shown to increase leaflet coaptation and curvature,1–3 and reduce leaflet and chordal stresses.4–6
Planar “O” shape in diastole
SimuForm™ rings are not fixed into a saddle shape — they are flattened to an “O” shape designed to accommodate diastolic filling dynamics.
Watch Dr. Michael Chu’s case presentation using the SimuForm™ ring in endoscopic mitral repair.
Clinical evidence
Results from a single-center, retrospective analysis show that the SimuForm™ platform7:
- Demonstrates excellent survival rates — 99.7% ± 0.2% at one year and 90.8% ± 4.6% at five years
- Shows high repair success rate with very low rates of reoperation at midterm follow-up with conventional and minimally invasive access
- Effectively reduces the risk of recurrent mitral valve regurgitation
- Reduces the risk of systolic anterior motion (SAM) — zero cases reported after mitral repair at midterm follow-up
Cumulative incidence of reoperation
Degree of mitral valve regurgitation
Key risks of mitral annuloplasty include recurrent regurgitation, stenosis, and ring/band dehiscence.
Watch Professor Lange’s presentation on the SimuForm™ platform's clinical performance at the EACTS 2021 annual meeting.
Accessory enhancements
Low-profile,
open holder
Place sutures along the entire semi-rigid ring while fully accessing anatomy.
Clearly marked
cut towers
Easily identify the two cut towers on the holder, which enables quick release of the ring.
Stable handle-to-holder
connection
Allows for low-force, single-cut release, and remains securely attached during suturing
Visual chordal
reference line
Provides visual reference of annular plane when performing chordal repair
Ordering information
| Item number | Ring size (mm) | A: Inner ring diameter (mm) | B: Outer ring diameter (mm) | Orifice area (mm2) | C: Stiffener assembly ID (mm) |
|---|---|---|---|---|---|
| 7800RR24 | 24 | 23.1 | 31.0 | 290 | 24.6 |
| 7800RR26 | 26 | 25.0 | 32.9 | 340 | 26.5 |
| 7800RR28 | 28 | 26.9 | 34.9 | 390 | 28.5 |
| 7800RR30 | 30 | 28.9 | 36.8 | 460 | 30.4 |
| 7800RR32 | 32 | 30.7 | 38.7 | 480 | 32.3 |
| 7800RR34 | 34 | 32.7 | 40.6 | 560 | 34.2 |
| 7800RR36 | 36 | 34.6 | 42.6 | 640 | 36.2 |
| 7800RR38 | 38 | 36.6 | 44.5 | 730 | 38.1 |
| 7800RR40 | 40 | 38.5 | 46.4 | 810 | 40.0 |
Components and accessories
| Item number | Description |
|---|---|
| T7800P | SimuForm™ accessory tray |
| 7800PS | SimuForm™ polysulfone sizer — 9 sizers |
| 7686 | Annuloplasty handle — length: 216 mm |
| 7686L | Annuloplasty handle — length: 254 mm |
| 7686XL | Annuloplasty handle — length: 373 mm |
Resources
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- Jensen MO, Jensen H, Levine RA, et al. Saddle-shaped mitral valve annuloplasty rings improve leaflet coaptation geometry. J Thorac Cardiovasc Surg. 2011;142(3):697–703.
- Ryan LP, Jackson BM, Hamamoto H, et al. The influence of annuloplasty ring geometry on mitral leaflet curvature. Ann Thorac Surg. 2008;86(3):749–760.
- Vergnat M, Jackson BM, Cheung AT, et al. Saddle-shape annuloplasty increases mitral leaflet coaptation after repair for flail posterior leaflet. Ann Thorac Surg. 2011;92(3):797–803.
- Jimenez JH, Liou SW, Padala M, et al. A saddle-shaped annulus reduces systolic strain on the central region of the mitral valve anterior leaflet. J Thorac Cardiovasc Surg. 2007;134(6):1562–1568.
- Padala M, Hutchison RA, Croft LR, et al. Saddle shape of the mitral annulus reduces systolic strains on the P2 segment of the posterior mitral leaflet. Ann Thorac Surg. 2009;88(5):1499–1504.
- Pierce EL, Bloodworth CH, Imai A, et al. Mitral annuloplasty ring flexibility preferentially reduces posterior suture forces. J Biomech. 2018;75:58–66.
- Sideris K, Burri M, Bordne J, et al. Repair of mitral valves with severe annular dilatation and abundant leaflet tissue using a prosthetic ring with a large anterior-posterior diameter. J Clin Med. 2022;11(6):1709.