Effect of the surface coating of puncture needle on puncture force of minimally invasive stereotactic excision system
Objective Minimally invasive breast circumferential surgery is an effective way to treat breast tumors.During the operation,the puncture needle needs to be inserted below the lesion for sampling.The surface characteristics of the puncture needle are closely related to the puncture force and stability in the process of puncture.The optimization of the puncture needle surface can effectively reduce the puncture force and the fluctuation of puncture force.This study explores the influence of surface treatment of puncture needle on puncture process.Methods By covering the surface of the puncture needle with a PTFE coating,the surface characteristics of the puncture needle were changed,and conventional needles,coated needles,and sandblasted coated needles were made separately.The conventional needle was a puncture needle without surface treatment,the coated needle was a puncture needle covered with a PTFE coating,and the sandblasted coated needle refers to using high pressure to apply abrasive to the surface of the puncture needle before spraying the PTFE coating,which increased the adhesion of the coating.The experimental subjects were selected as pork tissue rich in fat and beef tissue rich in fibrous connective tissue.Three types of puncture needles were used to conduct multiple puncture experiments on the two experimental subjects to explore the effect of coated puncture needles on the puncture process.We used ANSYS simulation software to conduct force analysis on puncture needles with different surface treatments.Using adipose tissue as the simulation object,the force distribution cloud maps and maximum force values on the surface of coated needles,sandblasted coated needles,and conventional needles were obtained through simulation calculations.Results The puncture force (1.239 N,3.926 N) for coating needle was better than that for conventional and sandblast coating needle.In addition,the simulation results showed that the force of the coated needle body (3.0426 MPa) was less than that of the conventional sandblasted needle.Conclusions Coating on the surface of the puncture needle effectively reduces the puncture force and the fluctuation of puncture force,and improves the stability of the puncture needle.
万方数据
维普
