Novel spatula and dissector for safer deep anterior lamellar keratoplasty

• Autor(a) principal: Bonfadini, Gustavo ,2,3
• Data de Publicação: 2014
• Outros Autores: Kim, Eun Chul, Campos, Mauro Silveira de Queiroz [UNIFESP], Jun, Albert S.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNIFESP
• Texto Completo: http://dx.doi.org/10.5935/0034-7280.20140060; http://repositorio.unifesp.br/handle/11600/8608
• topic: Deep anterior lamellar keratoplasty; Corneal transplantation/methods; Keratoplasty; Bonfadini dissector; Bonfadini spatula; Ceratoplastia lamelar anterior profunda; Transplante de córnea/métodos; Ceratoplastia; Dissector Bonfadini; Espátula Bonfadini

Objective: We describe a novel spatula and dissector to facilitate the big-bubble technique in deep anterior lamellar keratoplasty (DALK). Methods: A 29-year-old man who was diagnosed with bilateral keratoconus underwent deep anterior lamellar keratoplasty (DALK). After 350μm partial thickness incision of the recipient cornea, the Bonfadini dissector was inserted at the deepest point in the peripheral incision and could be advanced to the center of the cornea safely because of its semi-sharp tip. After achieving the big-bubble (BB) separation of Descemet membrane (DM) from the overlying stroma, the anterior stromal disc was removed. Viscoelastic material was placed on the stromal bed to prevent uncontrolled collapse and perforation of DM during the paracentesis blade incision into the BB. We could detect the safe opening of the BB using the Bonfadini dissector by the leakage of air bubbles into the viscoelastic material. After injecting viscoelastic material into the BB space, we inserted the Bonfadini spatula into the bigbubble safely because of its curved profile and blunt edges. The groove along the length of the Bonfadini spatula enables safe and efficient incision or the residual stromal tissue using the pointed end of a sharp blade while protecting the underlying DM. After removal of posterior stroma, the donor button was sutured with 16 interrupted 10-0 nylon sutures. Results: This technique and the use of the Bonfadini spatula and dissector facilitate exposure of Descemet membrane. Conclusion: The smooth Bonfadini DALK spatula and dissector facilitate safe and efficient completion of DALK surgery.