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New Instruments |

The Landers Trunkless Temporary Keratoprosthesis

Jessica S. Watson, MD; Thanh-Thu T. Tran, BS; Maurice B. Landers, MD
Arch Ophthalmol. 2011;129(8):1067-1069. doi:10.1001/archophthalmol.2011.189.
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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 100 mm Hg 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.

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Figure 1. Images of the new wide-angle Landers trunkless temporary keratoprosthesis (Ocular Instruments, Bellevue, Washington) (A and C) and the Landers wide-field temporary keratoprosthesis (Ocular Instruments) (B and D).

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Figure 2. Schematic diagram showing a cross-section of the Landers trunkless temporary keratoprosthesis (T-TKP; Ocular Instruments, Bellevue, Washington) sutured into the cornea. Note the location of the seal formation between the flat underside of the T-TKP and the anterior corneal surface.

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