Title: Developing a needle-knife surgical device

Abstract

Scope: Nowadays, a new era of orthopedic surgery is taking place. Procedures like ultrasound-guided interventions, invasive pain orthopaedics interventions, started to be widely performed. Objective: The aim of the project is a virtual development of a needle-knife surgical device to be useful for minimally invasive orthopaedic surgical procedures and other surgical procedures. Method: Three different needle devices were compared. One is a base model 1 and the other two are experimental models 2 and 3. They are based on a metal guide for intravenous catheter 14Gx2''. The base one model 1 is the metal guide for intravenous catheter 14Gx2''; the experimental model 2 is a flat beveled edge, and experimental model .3 is a board bevel edge they are all graduated, parylene-coated, with a stop handle needle guard. The devices were developed by 3D Design 3D STEP Standard Format, Catia V5 Format, and 2D Format Design and 3D Model. They were biomechanically simulated with Virtual Biomechanical Strength Simulation (Software Simulia Abaqus).. The Strengths were assessed by Needle Strength Analysis (CAE Simulation). Results: The present study compares three models. A control base model 1 and two experimental models; model 2 and model 3. Model 3 presented similar features in rigidity to the baseline model 1 (3,6%). They have a similar performance. The tip of model 3 increased a tension of 15%; but does not mean fracture risk 22. S Conclusion: These devices seem suitable for eco assisted orthopaedic surgery interventions and other procedures according to virtual analisis. Further in vivo procedures must be performed.