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Positive Outcomes for iSTAR Medical’s MIGS MINIject

September 29, 2020

iSTAR Medical, a medtech company developing minimally invasive ophthalmic implants for powerful, safe and enduring treatment of patients with glaucoma, announced today that its micro-invasive glaucoma surgery (MIGS) device MINIjectTM showed consistently positive safety and efficacy outcomes in a larger patient population from ongoing trials. The pooled analysis reviewed data from over 130 patients implanted with MINIject into the supraciliary space in stand-alone procedures across 11 trial sites in Europe, the Americas and Asia.

The final two-year data from the STAR-I trial and the six-month follow-up data from the STAR-II European trial, which are comprised in the pooled analysis, will both be presented at the upcoming European Society of Cataract and Refractive Surgery (ESCRS) meeting on October 2-4. The six-month primary endpoint results from the STAR-II trial of MINIject have recently been published in the peer-reviewed Journal of Glaucoma, the official publication of the World Glaucoma Association.

Safety results

According to the pooled data analysis, only 5 percent of patients implanted with MINIject have required secondary glaucoma surgery to date. Considering that a third of patients have already completed 18 and 24-month follow-up, the reintervention rate is very low compared to standalone trials for other MIGS devices.[1],2,3,4 Minimising the number of repeat surgical interventions for glaucoma while preventing disease progression may help improve visual function and quality of life at a sustainable personal and financial cost, which are key patient management goals long-term.5

Moreover, mean central corneal endothelial cell density (ECD) loss at six months was only 2 percent and there was no occurrence of ECD loss greater than 30 percent in patients analysed per protocol from all MINIject trials followed-up at six months. In patients from the STAR-I trial, which concluded at two-years, mean ECD loss remained low (5 percent), with no patient having ECD loss greater than 30 percent at study completion. High ECD loss levels can cause corneal edema and loss of transparency, which disrupt vision. MINIject’s low ECD loss outcomes are very promising for a MIGS device.7,8

“For optimal treatment of my glaucoma patient over the longer-term, I need a procedure that works first time, delays more invasive surgery and maintains conjunctival health,” stated Professor Julián García-Feijoó from Hospital Clinico San Carlos, Complutense University, Madrid (Spain) and a STAR-II study investigator. “The data available so far suggest that MINIject works effectively, may help prevent risks, and improves overall patient management compared with other surgical treatments,” he added. “The implant adapts well to the anterior segment anatomy and scleral curvature so there is no contact with the corneal endothelium. At 6 months, mean ECD loss was just 2%; these results are promising, but have to be confirmed in the long-term.”

Efficacy data

Pooled data from patients implanted with MINIject in the STAR-I and STAR-II trials showed a mean IOP reduction of 40 percent and mean IOP 14.5±5.4 mm Hg at six months, from 23.9±3.4 mm Hg at trial start (p<0.0001). Eye pressure is considered normal up to 21 mm Hg. In addition, a remarkable 70 percent of patients became and remained medication-free six months after intervention, from a mean 2.4±1.1 medications used per patient before trial start.

Two-year data from the STAR-I trial showed that mean IOP remained low (13.8±3.5 mm Hg) and nearly 50 percent of patients remained medication-free.

“The outstanding results in IOP and medication reduction observed in patients treated with MINIject across trials are unprecedented for a MIGS device, considering that they purely reflect the outcomes from MINIject use, without concomitant cataract surgery,” stated Doctor I. Paul Singh, glaucoma specialist, President of The Eye Centers of Racine & Kenosha (Wisconsin USA), and one of the implanting surgeons in the MINIject trials.

“We are analysing pooled data from all ongoing MINIject trials to outline data consistency in a larger patient population,” explained iSTAR Medical CEO, Michel Vanbrabant. “The very promising efficacy, safety and longer-term results in the supraciliary space to date boost confidence in MINIject’s potential to revolutionise treatment for patients with glaucoma,” he concluded.

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