• Dafodil Neo Pericardial Bioprosthesis is a Triple Composite biomechanically engineered valve. It combines the latest engineering advancements over the Dafodil valve along with the benefits of bovine pericardial tissue.
  • Dafodil Neo comes with certain enhancements in implantability (reduced profile and an extension holder handle) suitable for minimally invasive valve replacement.
  • A reduction in the sewing ring diameter ensures better utilisation of the patient annulus area that ultimately translates into better hemodynamics for the patient. 
  • Dafodil Neo Aortic valve comes with a unique 17mm size offering (by prescription only) that is suited for narrow aortic annulus found in certain patients.
  • Pericardial tissue and Elgiloy stent material are both known for their optimal intrinsic properties for valve manufacture.​
  • Integrated processes such as Unique Tissue fixation, Advanced Tissue Thickness Matching Technology for Uniformity, and Tissue Deflection Testing enable leaflets to be accurately matched.​
  • Position-specific design answers the challenging requirements of the mitral & aortic position Unique Delivery System For Mitral Position with the new Active flex technology that helps in reducing the external stent post diameter to aid in valve placement in the mitral position.

Advantages and Properties

Trusted durability


  1. Three leaflets are independently laser cut to provide precision and uniformity in size and shape for better haemodynamics and durability.
  2. Triad-frame design with elgiloy alloy wireform provides Robustness via Superior spring efficiency, Fatigue and Corrosion resistance.
  3. Leaflets are treated with proprietary anti Calcification treatment to increase the valve’s long term durability.
  4. In-vitro testing: 200 M cycles proven in-vitro durability as per ISO 5840.
  5. Protected by Anti Ca+ anticalcification treatment that helps in removing aldehydes and phospholipids.


Ease of Implantability



  1. New 17mm size offering suited for small aortic annulus (custom made device on prescription basis only).
  2. Commissural markers on sewing ring facilitates suture placement and valve orientation.


  1. Reduced mitral protrusion to provide greater ease of implantability.
  2. Locking threads and Rotator are additional components in the construction of the Mitral valve.
  3. Polyester Black sutures in Mitral valves helps reduce the profile of the commissures, easing the bio-prosthesis implantation in the Mitral annulus.
  4. Separate long holder handle is provided, making it suitable for minimally invasive procedures.




  1. The pericardial leaflets are matched in all aspects (triple composite design) to ensure optimal coaptation that helps in minimising valve regurgitation.
  2. Dafodil Neo comes with a reduction in the stent diameter to tissue annulus diameter ratio that translates in superior hemodynamics for a given patient annulus.




An Aortic Dafodil Neo™ Pericardial Bioprosthesis is indicated for use in patients whose aortic valvular disease is sufficiently advanced to warrant replacement of their natural valve with a prosthetic one. It is also intended for use in patients with a previously implanted aortic valve prosthesis which is no longer functioning adequately and requires replacement. In the latter case, the previously implanted prosthesis is surgically excised and replaced by the replacement prosthesis.



Product Specifications

Available Bioprosthesis Diameter(mm)

 Ordering Information
Aortic Model Mitral Model


*17 mm valve is avilable as a "Custom made device" on prescription only

19 DDLN19A N/A
21 DDLN21A N/A
31 N/A DDLN31M
33 N/A DDLN33M

Size Chart

Meril Dafodil Neo Aortic Valve 17mm 19mm 21mm 23mm 25mm 27mm 29mm
A. Tissue Annulus Diameter 17 19 21 23 25 27 29
B. Internal Stent Post Diameter(Base) 16 18 20 22 24 26 28
C. External Sewing Ring Diameter 23 25 27 29 31 33 35
D. Total Profile Height 14 14 15 16 17 18 18


Meril Dafodil Neo Mitral Valve 23mm 25mm 27mm 29mm 31mm 33mm
A. Stent Diameter(Wire Form) 23 25 27 29 31 33
B. External Stent Post Diameter(Base) 26.5 28.5 30.5 33 35 37
C. External Stent Post Diameter(Tip) 27 29 31 33.5 35.5 35.5
D. External Sewing Ring Diameter 33 36 38 41 43 45
E. Ventricular Protrusion 9 10 11 12 12 12
F. Total Profile Height 15 16 17 18 18 19

Clinical Data

Product IFU

Note: IFU will be displayed after MDR Certification