Minimally invasive puncture criterion

Abstract

The puncture is used for the diagnosis and treatment of different diseases in human body. During needle insertion, several events occur, causing tissue damage during the needle advance into the tissue. This work focuses on analyzing the needle insertion effects in a single tissue layer. To accomplish this, different forms to characterize tissue damage during the puncture procedure are analyzed. To decrease the damage caused into the tissue, a minimally invasive puncture criterion is established for a single layer needle insertion. To validate the minimally puncture criterion, a combined mathematical model is presented, which characterizes the needle-tissue dynamics. When performing numerical simulations, the dynamics of the model is analyzed in order to validate the damage criterion. Model simulations verify that a needle insertion velocity increment generates less tissue deformation and rupture force. Taking into account the damage criterion, simulations corroborate that the tissue damage decreases when the needle insertion velocity increases. Experiments in animal tissue are carried out in order to corroborate the numerical simulations results, due to dynamics of the tissues behavior not included in the model, and confirm the minimally invasive puncture criterion. The animal tissue experiments allow to conclude that puncture the minimally puncture criterion, associated to the surface damage area, is directly proportional to tissue deformation and rupture force and inversely proportional to the respective insertion velocity.