SimuForm™
Annuloplasty Ring
Surgical Valve Repair

The SimuForm ring provides semi-rigid posterior remodeling while offering a flexible anterior portion to accommodate motion.

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Overview

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.

Product Details

Saddle-shaped in Systole

  • 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
SimuForm ring on gray gradient background

Planar "O"-shaped in Diastole

SimuForm rings are not fixed into a saddle shape — they are flattened to an "O" shape to accommodate diastolic filing dynamics.

SimuForm ring on blue gradient background

Accessory Enhancements

SimuForm holder on gray gradient background

Low-profile, Open Holder Place sutures along the entire flexible ring while fully accessing anatomy.

SimuForm cut towers on blue gradient background

Clearly Marked Cut Towers  Easily identify the two cut towers on the holder, which enables quick release of the ring.

SimuForm handle-to-holder connection on gray gradient background

Stable Handle-to-holder Connection
Allows for low-force, single-cut release, and remains securely attached during suturing.

SimuForm chordal reference line on blue gradient background

Visual Chordal Reference Line
Provides visual reference of annular plane when performing chordal repair.

Product Specifications and Ordering Information

Simuform Ring Product Information

Illustration of SimuForm ring with callouts

A: Inner Ring Diameter

B: Outer Ring Diameter

C: Inner Stiffener Diameter

Size
(mm)

Product
Codes

“A”
(mm)

“B”
(mm)

Orifice Area
(mm2)

Stiffener Assembly
Inner Diameter (mm)

24

7800RR24

23.1

31.0

290

24.6

26

7800RR26

25.0

32.9

340

26.5

28

7800RR28

26.9

34.9

390

28.5

30

7800RR30

28.9

36.8

460

30.4

32

7800RR32

30.7

38.7

480

32.3

34

7800RR34

32.7

40.6

560

34.2

36

7800RR36

34.6

42.6

640

36.2

38

7800RR38

36.6

44.5

730

38.1

40

7800RR40

38.5

46.4

810

40.0

 

Simuform Ring Ordering Information

SimuForm accessory tray on white background

Order Number

Components & Accessories

T7800P

SimuForm Accessory Tray

7800PS

Set of 9 SimuForm Polysulfone Sizers

7686

7686L

7686XL

Annuloplasty Handles in Assorted Lengths

Additional Resources

Contact Information

LifeLine Cardiovascular
Technical Support

877-526-7890

Send Us an Email

Medtronic
Mitral Academy

Training, education, and collaboration on the treatment of mitral and tricuspid valve disease.

Register Here

References

1

Jensen MO, Jensen H, Levine RA, et al. Saddle-shaped Mitral Valve Annuloplasty Rings Improve Leaflet Coaptation Geometry. J Thorac Cardiovasc Surg. September 2011;142(3):697-703.

2

Ryan LP, Jackson BM, Hamamoto H, et al. The Influence of Annuloplasty Ring Geometry on Mitral Leaflet Curvature. Ann Thorac Surg. September 2008;86(3):749-760.

3

Vergnat M, Jackson BM, Cheung AT, et al. Saddle-shape Annuloplasty Increases Mitral Leaflet Coaptation After Repair for Flail Posterior Leaflet. Ann Thorac Surg. September 2011;92(3):797-803.

4

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. December 2007;134(6):1562-1568.

5

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. November 2009;88(5):1499-1504.

6

Pierce EL, Bloodworth CH, Imai A, et al. Mitral Annuloplasty Ring Flexibility Preferentially Reduces Posterior Suture Forces. J Biomech. June 25, 2018;75:58-66.