Method for precise localization and treatment of a target site and a medical auxiliary apparatus

A method for precise localization and treatment of a target site in vitro, wherein the method comprises the following steps:

• S1:
• a computer-aided design software is used for building a digital model of a body surface morphology and an anatomical bony structure of a patient in accordance with tomographic image data of the patient, and a 3D position of the target site is determined based on the digital model of the body surface morphology and the anatomical bony structure;
• S2:
• the computer-aided design software is reused to design a template model for locating an extracorporeal target site which closely fits a body surface of the digital model of the body surface morphology and the anatomical bony structure of the patient based on the digital model of the body surface morphology and the anatomical bony structure obtained in S1;
• subsequently, an angle locating auxiliary unit model is designed on the template model for locating the extracorporeal target site according to the 3D position of the target site determined in S1, wherein the angle locating auxiliary unit model comprises an auxiliary tunnel, a relative angle of which is jointly determined by a position of the target site, the position of the angle locating auxiliary unit model and the position of relevant important organ or tissue;
• S3:
• the template model for locating an extracorporeal target site with the angle locating auxiliary unit model is printed by 3D printing technology, so as to produce an extracorporeal target site locating structure having an auxiliary tunnel;
• and
• S4:
• the extracorporeal target site locating structure produced in S3 is mounted on a corresponding position of a body surface of the patient, then a treatment device is used to correspondingly treat the target site through a micro incision during surgery with an assistance of the angle locating auxiliary unit model;
• wherein a method for designing the template model for locating the extracorporeal target site in S2 comprises:
• a. a localization path which passes through the target site and has a shortest distance from the body surface is designed on the digital model of the body surface morphology and the anatomical bony structure;
• a point on the body surface is set as a puncture point according to the localization path;
• taking a body surface mark of the patient as a reference point, an anatomical orientation point is designed on the digital model of the body surface morphology and the anatomical bony structure for assisting the extracorporeal target site locating structure in properly placing and locating;
• and
• b. in accordance with the anatomical orientation point, the localization path and the puncture point, the computer-aided design software is used to design the template model for locating the extracorporeal target site which closely fits the body surface of the digital model of the body surface morphology and the anatomical bony structure.