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    Single-use MIGS device demonstrates significant reduction in IOP in retrospective study

    Study compared two minimally invasive ab interno trabecular meshwork/canal-based procedures

     

     

    Micro bypassing

    The iStent is a trabecular micro-bypass product that directly connects the anterior chamber to Schlemm’s canal and creates a permanent opening within it (Figure 2).

     

    The device is a titanium stent—about 1 mm × 0.3 mm in size—that connects at right angles to the canal-implanted portion. It comes with an inserter, which is guided into a corneal wound and into the anterior chamber. The device is then inserted into the canal under gonioscopic view.

     

    The retention arches on the closed side of the body serve to securely fixate the device in Schlemm’s canal. The open half-pipe portion of the body is against the outer wall in order to access a collector channel.  

     

    One chal­lenge with this approach is that the stent may not necessarily be positioned near a collector channel, since there is no assurance of what lies beyond the TM. Commercially available imaging methods do not provide a pre- or peri-operative visualisation of these collector channels. Addition­ally, some collector channels may be more active than others.

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