New Technique for Nuclear Fragmentation in Phacoemulsification

Hassan L. Fahmy MD¹ and Heba M saad Eldien²*

¹Professor of Ophthalmology, Faculty of Medicine, Assiut University, Egypt

²Professor of Histology and cell biology, Faculty of Medicine, Assiut University, Egypt

Accepted 07 October, 2014

*Corresponding Author E-mail: heba_saadeldien2003@yahoo.com; Mobile: 01006165499; Fax: 088/2332278

Abstract

The hard nucleus is considered as a piece of stone, so we use high phaco energy in standard phaco to fragment it. A new technique was described in this paper for nuclear fragmentation in Phacoemulsification, which does not depend mainly on phaco energy but depends on osmotic pressure of the nucleus. The nucleus is a living tissue and has its own special anatomical and physiological rules so we tried to fragment these hard nuclei rapidly and safely without phaco energy at all. This study included 20 patients with hard cataract managed by our new technique. 15 patients with hard cataract managed by divide and conquer technique (control group). we aimed to create a groove with two edges, to inject saline 0.9% at one edge and fixate from the other. Also we aimed from this groove to compensate for relative increase in the size of the nucleus after hydration then we used two blunt choppers to divide the nucleus into four pieces. All pieces were similar to gelatinous mass with no sharp borders. We found that corneal oedema, rupture of posterior capsule and mean effective Phaco time were significantly higher in controls versus patients (P <0.019, P <0.026 and P <0.0001, respectively). While there were insignificant difference in macular edema, increase in intra-ocular pressure and visual acuity parameters between patients and controls (P <0.681, P <0.681 and P <0.944, respectively). In conclusion, the hard nucleus has high osmotic pressure if activated it can fragment itself. Fragmentation of the hard nucleus by simple method rendered it more soft, easily aspirated, with less manipulation. This new technique save energy and its related complications.

Keywords: Phacoemulsification, cataract,  saline , lens nucleus