MIGS cyclodialysis device evolution | First generation | First generation | Second generation | Second generation |
Name | CyPass | iStent Supra | MINIJect | Biostent |
Material | Synthetic Polyimide plastic | Synthetic Polyethersulfone and titanium | Synthetic Porous silicon | Biotissue Porous scleral allograft |
Stented approach | Cyclodialysis tube Maintainer stent | Cyclodialysis tube Maintainer stent | Porous cyclodialysis Maintainer stent | Porous cyclodialysis Maintainer biostent |
Implantation depth control (IDC)* | None | None | None | Goniometric |
Implantation Technique | Intraoperative gonioscopy | Intraoperative gonioscopy | Intraoperative gonioscopy | Intraoperative gonioscopy or gonio-free IDC† |
Material permeability | Non-permeable Non-hydrophilic | Non-permeable Non-hydrophilic | Porous, hydrophilic, permeable | Porous, hydrophilic and permeable25 |
Structural rigidity | Rigid Non-conforming | Rigid Non-conforming | Semirigid Semiconforming | Flexible Conforming |
Homologous stenting with endoscleral cleft reinforcement | No | No | No | Yes |
Stent images are provided in figure 1.
*IDC for goniometric deployment.
†Grierson et al 30.