GDDs | Year of introduction | Tube material | Plate material |
---|---|---|---|
Molteno | 1979 | Silicone | Polypropylene |
Baerveldt | 1990 | Silicone | Silicone |
Krupin with disc | 1990 | Silicone | Silicone |
Ahmed | 1993 | Silicone | Polypropylene with silicone valve |
Optimed Model-1014 | 1995 | Silicone | Silicone with PMMA matrix |
Helies | 1997 | N/A | PTFE |