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Gregory A Hutcheson, David O. Zamora, Brian Lund, Jeffery Cleland, Jeff C Rabin; The Use of a Full-Thickness Corneal Penetration Wound Model to Simulate Battlefield Ocular Trauma. Invest. Ophthalmol. Vis. Sci. 2017;58(8):168.
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IED explosions and the shrapnel they generate is the primary source of penetrating ocular wounds incurred by warfighters in combat over the last 15 years. Such wounds are difficult to treat on the battlefield and repercussions of such wounds on other ocular structures and cells are unknown. The objective of this study was to develop a reproducible bench top eye puncture model that would accurately simulate penetrating ocular wounds commonly seen in our soldiers.
A prototype device was built using a Murphy 12 DC solenoid (E-Motion Inc.) and controlled using Lab View Software (National Instruments). Puncture rods of various gauges and shapes were attached to the solenoid drive shaft and used to simulate shrapnel-created full thickness puncture wounds. A high speed video capture system (nac MEMRECAM HX-4) was used to record and measure the acceleration, velocity and impact of the puncture head through Cooper Vision Biofinity soft contact lenses.
The average acceleration of the puncture-head in our system was calculated at 12.6 m/s, while the average velocity was 1.44 m/s (n=3). Using the values of the mass of the puncture head-solenoid shaft device (0.157 kg) and average acceleration, the force on the solenoid shaft was calculated to be 1.98 N. As such, the average kinetic energy at impact was 0.16 Joules.
The solenoid penetrating eye injury model successfully simulated battlefield penetrating ocular injuries in a consistent and systematic manner. Using this puncture model system, we can begin to investigate how size, shape and depth of puncture wounds influences wound healing of the eye. Data generated by this study will assist in developing novel methods to seal such wounds on the battlefield.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
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