New minimally-invasive shunt

Device made from SIBS which conforms to the curvature of the eye

New minimally-invasive shunt
Dermot McGrath
Dermot McGrath
Published: Tuesday, November 1, 2016
[caption id="attachment_6189" align="alignnone" width="750"] InnFocus MicroShunt two years post-op[/caption] A new minimally-invasive shunt has demonstrated significant reduction in both intraocular pressure (IOP) and use of glaucoma medication in a long-term study, according 
to Isabelle Riss MD. “This procedure is very simple, with immediate and safe pressure reduction. It can be effectively combined with cataract surgery and the postoperative treatment is very similar to cataract surgery,” Dr Riss told delegates at the XXXIV Congress of the ESCRS in Copenhagen, Denmark. The patients studied had an average preoperative fully medicated IOP of 24.8mmHg (±6.1mmHg). Two years after implantation of the InnFocus MicroShunt™ (InnFocus Inc., Miami, Florida, USA), the average IOP was reduced 47% from baseline to 13.0mmHg (±4.6 mmHg), and over 70% of eyes recorded an IOP equal to or less than 14mmHg. There was a 79% reduction in glaucoma medications to 0.6 medications per patient, and 74% of patients were entirely off glaucoma medications at two years. Dr Riss’s study included a total of 79 patients at two centres in Bordeaux, France and Santo Domingo, Dominican Republic. Prior to surgery, patients were either phakic (31/79), pseudophakic (30/79), or phakic with combined phacoemulsification and intraocular lens placement (18/79). BIOCOMPATIBLE MATERIAL She noted that the InnFocus MicroShunt is made from SIBS, a highly biocompatible thermoplastic material, which conforms to the curvature of the eye and demonstrates clinically insignificant inflammation and tissue encapsulation. The device is placed in the anterior chamber through an ab externo fornix-based scleral needle track which is created posteriorly to the limbus. “The lumen of the device at 70 microns is sufficiently large to pass sloughed endothelial cells yet small and long enough to prevent hypotony. Planar fins on the shunt prevent the device from migrating into the anterior chamber and also serve to minimise aqueous humour leakage around the tube,” she said. Putting the results in context, Dr Riss stated that there were no significant differences in IOP and medication use in patients at one and two years in eyes that were phakic, pseudophakic and combined with cataract surgery at the time of implant. “The overall reduction in IOP at one and two years was 47% and 48%, and the overall reduction in medication use was 81% and 74%, respectively,” she said. The safety profile of the device was also excellent, she said, with no long-term sight-threatening adverse events. Transient hypotony of less than 5mmHg after day one was present in 6.3% of patients, all of which resolved spontaneously. There were no long-term sight-threatening adverse events such as endophthalmitis, chronic hypotony, or choroidal haemorrhage, she said. “The InnFocus MicroShunt is safe, effective and practical in eyes that are phakic, pseudophakic and require concomitant cataract surgery,” she concluded. Isabelle Riss: isabelleriss@orange.fr
Tags: glaucoma, shunt
Latest Articles
Addressing Postoperative Visual Complications

Managing aberrations after laser refractive surgery requires a multi-layered approach.

Read more...

3D Printing Helps Transform Ukrainian Eye Care

The country’s ophthalmologists offer valuable experience in treating ocular trauma and prosthesis design.

Read more...

Winning Essay Says ‘Collective Desire’ Must Drive DEI Implementation

Read more...

Emerging Microbial Trends That Could Affect Your Practices

A triptych of challenges paints a concerning picture for ophthalmologists across the globe.

Read more...

Improving Outcomes with Laser-Assisted Surgery

Femtosecond laser offers a multifunctional tool for improving the safety and efficacy of cataract and refractive lens exchange procedures.

Read more...

Could the Corneal Transplant Pool Increase?

Modifying or discarding major contraindications for keratoplasty could mean more patients have their sight restored.

Read more...

Matching Premium IOLs to Visual Lifestyles

From monofocal to full-range solutions, each practice needs comprehensive understanding.

Read more...

Going Dutch on Acanthamoeba Keratitis

A world-first trial suggests a new medication could beat the disease.

Read more...

ESCRS Today 2025: Happy Anniversaries!

ESCRS celebrates milestones with pioneers in IOLs, LASIK, femtosecond lasers, and corneal transplantation.

Read more...

ESCRS Today 2025: A Congress for Everyone

From YOs to families, the ESCRS Annual Meeting embraces full participation through inclusivity.

Read more...