Clinical Trial: Evaluation of Biosynthetic Constructs to Replace Donor Corneas

Study Status: Withdrawn
Recruit Status: Withdrawn
Study Type: Interventional

Official Title: Evaluation of Biosynthetic Constructs as Replacement for Donor Corneas as Graft Material for Corneal Transplantation

Brief Summary: Constructs made from cross-linked Human Recombinant Collagen type III are being used instead of human donor corneas in 6 patients at Deep anterior lamellar cornea grafting. Six patients serve as controls and are receiving human donor corneas using the same surgical technique. The twelve patients will be recruited from the local waiting list for patients to be undergoing corneal grafting. If the patients meet the inclusion criteria and agree to participate following oral and written consent, they will be randomized to either group. The patients will be followed for 12 months and documented with OCT, In Vivo Confocal Microscopy, slit lamp photography a o. The study is planned as a safety study with initial efficacy documentation.

Detailed Summary:

12 patients will be recruited from the waitinglist for corneal transplantation.The will all be of the age of 18 years or older and capable of making their own decisions. Their medical history and present medication is reveiwed and they undergo a thorough ophthalmological examination in order to find out if they meet the inclusion criteria and create baseline values for the study. Their general health or medication should not affect the cornea or ocular surface. The Eye should be healthy with the exception of the disease indication for corneal grafting. The corneal endothelium should be healthy. Any opacification in the eye to be grafted should not reach the Descemets membrane. Visual acuity in the fellow eye should be good. If these criteria are met the patient recieve oral and written information of the study. If they agree to participate they will be randomized to either recieve biosynthetic corneas ( 6 patients) or they will recieve a donated cornea ( 6 patients) . They will be scheduled for surgery within 2 weeks from the examination irrespective if they participate in the study or not.

The surgery will be anterior deep lamellar using the femtosecond laser to do the patient cut. The laser cut wil be done in topical anaaestesi. The remaining surgery with either be performed in local oor general anaestesia according to the patients wish. The diameter of the cut will be 7 mm in diameter. The graft material will be punched to a diameter of 7.25 mm. The thickness of the material will be 500 µm . An amniotic membrane will be placed on the top of the biosynthetic material and sutured with single stiches together with the graft.A bandage lens will be placed . The donated corneas will be sutured with singled about 8 stiches.

The biosynthetic corneas will recieve topical antibiotics and dexametasone for 8 weeks when the sut
Sponsor: Region Östergötland

Current Primary Outcome: Biocompatibility: Good engraftment,epithelialization, no neovascularization,retained transparency, no host inflammatory reaction [ Time Frame: 1 year ]

Original Primary Outcome: Same as current

Current Secondary Outcome: Visual acuity [ Time Frame: 1 year ]

Original Secondary Outcome: Same as current

Information By: Region Östergötland

Dates:
Date Received: February 23, 2015
Date Started: June 2015
Date Completion:
Last Updated: April 14, 2016
Last Verified: April 2016