advertisement
Abstract #12153 Published in IGR 7-2
Simulation of airbag impact on eyes after trabeculectomy by finite element analysis method
Azukisawa M; Sato T; Ito Y; Kamezawa H; Nomura E; Nishide T; Kadonosono K; Uchio E; Goto SNippon Ganka Gakkai Zasshi 2005; 109: 406-416
PURPOSE: A finite element computer model of the human eye after trabeculectomy was used in an experiment of simulated airbag ocular injury. METHODS: A half-layer-incised scleral flap was created on the limbus and the strength of its adhesion to the outer sclera was set at 30%, 50% and 100%. The simulations were performed at a workstation using the finite element analysis program PAM CRASH (Nihon ESI, Tokyo, Japan), and the airbag was set to hit the surface of the post-trabeculectomy eye at various velocities in two directions, straight to the corneal center or straight to the scleral flap. RESULTS: In the case of airbag impact on the corneal center, the scleral flap was unlikely to rupture except when the airbag impact velocity was 40 m/sec. In the case of airbag impact on the scleral flap, at the lowest impact velocity of 20 m/sec, partial scleral flap rupture was likely to occur only at the lower adhesion strength, and scleral laceration extending to the posterior sclera was observed at impact velocities of over 30 m/sec. CONCLUSIONS: These simulation results suggest that current airbags may induce globe rupture in eyes after trabeculectomy treatment. LA: Japanese
Dr. M Azukisawa, Department of Ophthalmology, Yokohama City University Medical Center, Japan
Classification:
12.8.11 Complications, endophthalmitis (Part of: 12 Surgical treatment > 12.8 Filtering surgery)