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An Infusion Temporary Keratoprosthesis for Pars Plana Vitrectomy.

All PPV were performed by one surgeon (MS) under local retrobulbar anesthesia. Transconjunctival oblique tunnel-like 20 gauge sclerotomies were performed as previously described. The standard reference point for sclerotomy placement was 3.5mm posterior to the limbus. A 6-mm infusion cannula was inserted infero-temporally at the pars plana. The two other ports were placed supero-nasally and supero-temporally. PPV was then performed with visualization through the optical cylinder of the KPro front plate. The binocular indirect ophthalmomicroscope (BIOM) provided an anatomical field of view beyond the equator and improved vision through the small aperture of the KPro. Scleral depression was used as needed to improve visualization. Depending on the retinal pathology, PPV was supplemented with scleral buckling, PVR membrane removal, and silicone oil injection. Sclerotomies were not sutured unless leakage was observed, or silicone oil tamponnade was used.

Vitreoretinal complications after Boston Keratoprosthesis (KPro) implantation, specifically retinal detachment, may lead to severe visual loss. Attempts at repair pose unique surgical challenges. The standard treatment of vitreoretinal disease in patients with opaque corneas precluding adequate visualization of the fundus has been pars plana vitrectomy (PPV) through a Temporary KPro (TKPro). This technique's short and long, term outcomes have shown variable degrees of success. However, data on PPV for posterior segment disease in patients with permanent Boston KPro is scarce., , , Hence, the purpose of this study was to evaluate its feasibility and its outcomes.

Wide-Field Landers Temporary Keratoprosthesis in …
Photo provided by Flickr

Pars plana vitrectomy through the Boston Keratoprosthesis …

and simultaneous pars plana vitrectomy (VE) …
Photo provided by Flickr

Objective: To demonstrate the watertight seal created by the new wide-angle Landers trunkless temporary keratoprosthesis (T-TKP). Methods: In 20 enucleated, porcine eyes, a 7.5-mm trephination was made, followed by capsulorrhexis and lensectomy. The T-TKP was sutured securely onto each eye. Testing the watertight seal at an intraocular pressure of 100 mm Hg was performed before and after pars plana vitrectomy. Results: In all 20 eyes, the T-TKP maintained its watertight seal at an intraocular pressure of 100mmHg before and after vitrectomy. Conclusion: The Landers T-TKP is a reusable device that provides a clear view and watertight eye in the presence of corneal trephinations up to 7.5 mm in diameter. Because of its unique trunkless design, as demonstrated in the laboratory, the T-TKP should allow the surgeon greater flexibility than previous models in cases of ocular trauma.

N2 - Objective: To demonstrate the watertight seal created by the new wide-angle Landers trunkless temporary keratoprosthesis (T-TKP). Methods: In 20 enucleated, porcine eyes, a 7.5-mm trephination was made, followed by capsulorrhexis and lensectomy. The T-TKP was sutured securely onto each eye. Testing the watertight seal at an intraocular pressure of 100 mm Hg was performed before and after pars plana vitrectomy. Results: In all 20 eyes, the T-TKP maintained its watertight seal at an intraocular pressure of 100mmHg before and after vitrectomy. Conclusion: The Landers T-TKP is a reusable device that provides a clear view and watertight eye in the presence of corneal trephinations up to 7.5 mm in diameter. Because of its unique trunkless design, as demonstrated in the laboratory, the T-TKP should allow the surgeon greater flexibility than previous models in cases of ocular trauma.

for use during pars-plana vitrectomy

AB - Objective: To demonstrate the watertight seal created by the new wide-angle Landers trunkless temporary keratoprosthesis (T-TKP). Methods: In 20 enucleated, porcine eyes, a 7.5-mm trephination was made, followed by capsulorrhexis and lensectomy. The T-TKP was sutured securely onto each eye. Testing the watertight seal at an intraocular pressure of 100 mm Hg was performed before and after pars plana vitrectomy. Results: In all 20 eyes, the T-TKP maintained its watertight seal at an intraocular pressure of 100mmHg before and after vitrectomy. Conclusion: The Landers T-TKP is a reusable device that provides a clear view and watertight eye in the presence of corneal trephinations up to 7.5 mm in diameter. Because of its unique trunkless design, as demonstrated in the laboratory, the T-TKP should allow the surgeon greater flexibility than previous models in cases of ocular trauma.

A new keratoprosthesis was used during pars plana vitrectomy in order to test the ..
Photo provided by Flickr

To ascertain the feasibility of pars plana vitrectomy (PPV) through a permanent Boston Keratoprosthesis type 1 (KPro) without the use of a temporary KPro.

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