1. Implantation of a mechanical valve within a flexible mitral annular ring 
Yuzuru Sakakibara, MD, Yoshiharu Enomoto, MD, Akinobu Sasaki, MD, Motoo Osaka, MD, Toshio Mitsui, MD 
The Annals of Thoracic Surgery 
Volume 68, Issue 6, Pages (December 1999)
DOI: /S (99)

2. Fig 1
Implantation of a mechanical valve within a Duran flexible ring. Only the mitral leaflet is excised and the posterior leaflet is not preserved. Mattress sutures were placed through the surrounding atrial tissue and the ring for fixing the mechanical valve prosthesis.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

3. Fig 2
Parameters for exact orfice matches in this technique: (left) internal diameter of the Duran flexible ring; (right) annulus size of the standard mitral mechanical (ATS) valve. (ATS = Advancing The Standard; ATS Medical Inc, Minneapolis, MN.)
The Annals of Thoracic Surgery  , DOI: ( /S (99) )