PHILADELPHIA – Ab interno and ab externo Xen gel stent implantation outcomes were similar with regard to IOP and medication reductions, with the external approach demonstrating less need for postoperative bleb needling, according to a study presented at the Wills Eye Conference.
The ab interno approach, which traverses the anterior chamber to deliver the Xen stent (Allergan) is the traditional method of deployment, whereas an ab externo approach “starts from the outside in,” Robert Purgert, MD, PhD, said.
An insertion tunnel is developed beneath the conjunctiva, pierces
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