Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 07, 2017 - October 09, 2017
Surgical procedure of cataract surgery has been recognized as the highly sophisticated and safety surgery in a short time. The mainstream of the surgical procedure of cataract is the way to insert an artificial lens into the eye after the suction removal of the clouded lens. Hydrodissection is the peeling of the lens capsule and the cortex using water injection, which facilitates the rotation of the lens nucleus. But lens capsule is damaged when the pressure of the water injection is too high. To solve this problem “Irrigation dynamic pressure-assisted hydrodissection” was devised. This technique achieves stable intraocular pressure by using not only water injection but also aspiration. Actually, the peeling effect has been confirmed in safety pressure. But its detailed mechanism is not known. Therefore, in this research we mainly focused on the peeling effect of dynamic pressure in hydrodissection. We made a simple model of the flow path of the instrument in cataract surgery. This model made it possible to estimate the dynamic pressure loaded to the eye. We conducted thin film peeling experiment by water flow, and calculated the pressure applied to the thin film from the deflection of the disk. As a result, the smaller the flow rate, the higher the loaded pressure applied to the thin film.
