The OMNI Surgical System from Sight
Sciences is an implant-free, minimally invasive technology, despite being a comprehensive
procedure, indicated for canaloplasty (microcatheterization and transluminal
visco-dilation of Schlemm’s canal) followed by trabeculotomy (cutting of
trabecular meshwork) to reduce intraocular pressure in adult patients with or
without cataract surgery, for mild, moderate, and advanced primary open-angle
glaucoma (POAG).
The OMNI is a handheld instrument with a
hollow tip through which ophthalmic viscosurgical device (OVD) can be injected
to perform visco-dilation and through which a microcatheter can be deployed to
perform trabeculotomy. Other features of the device include a gear wheel for
advancement and withdrawal of the microcatheter, a port for loading OVD into
the device, and a reservoir to hold it.
Under gonioscopic view, the handpiece tip is introduced into the OVD-filled anterior chamber through a temporal corneal incision and advanced to the nasal angle.
The tip then engages and passes through trabecular meshwork,
and the microcatheter is deployed via the cannula into and through 180° of
Schlemm’s canal.
The microcatheter is then retracted slowly as a fixed volume of OVD is injected to visco-dilate the canal and collector channels.
The procedure is then repeated on the
remaining 180° of the canal.
To perform the trabeculotomy, the same
catheter is advanced once again through 180° of Schlemm’s canal and withdrawn
using a cheese-wire technique to unroof the canal; this process can be repeated
on the remaining 180° of the canal.
Standard anti-inflammatory (dexamethasone)
and anti-microbial (ofloxacin) therapy are prescribed postoperatively.
Newer modifications include a cannula tip featuring
a new profile that allows for gentle and precise access to Schlemm’s canal,
while still enabling a complete 360-degree catheterization associated with the
OMNI procedure.
New enhancements enable surgeons to more
easily rotate and position the cannula tip within Schlemm’s canal using precise
finger rotations rather than wrist adjustments.
COMPANY WEBSITE: https://omnisurgical.com/
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