Which Needle in which Trocar? A Mathematical-Theoretical Approach

Aim-Background: Needles used in surgery come in various sizes and shapes, and with varying properties. In lapa-roscopic surgery, the trocars create the communication ports to the operative environment, and these ports are used for the introduction of instruments into the surgical field. Needles also need to be passed through these cannulas, which creates constraints regarding the needle size. The aim of this study was to describe the correlation between trocar size and needle size/shape.