Abstract
In epidural anesthesia, dural puncture is a serious medical accident. Then, we are studying the needle and the puncture method for preventing this medical accident. As a fundamental examination of failure analysis when sticking a biomechanical material with a needle, failure analysis at the time of applying load to the filmy natural rubber by the sharp bar was carried out with the finite element method. The influence on the failure by the difference m the tip form of a stick and the prediction by the nonlinear finite element analysis was possible m a certain domain was confirmed.
