A screw positioning system and working method for minimally invasive treatment of pelvic fractures

Abstract

The invention relates to a screw-setting positioning system for pelvis fracture minimally invasive therapy and a working method. The screw-setting positioning system comprises a positioning mechanism,a coordinate system mechanism, an adjusting mechanism, a scanning mechanism, a modeling mechanism and an aiming mechanism, the positioning mechanism is used for being fixed at a body surface positionof a pelvis position to form a base plane, the coordinate system mechanism is used for being arranged outside a pelvis and connected with the positioning mechanism to form an in-vitro coordinate system, the adjusting mechanism is used for adjusting one coordinate axis in a coordinate system to be perpendicular to the base plane, the scanning mechanism is used for scanning the pelvis and the coordinate system mechanism at the pelvis position, the modeling mechanism is used for building a pelvis model and a graphic coordinate system matched with the coordinate system mechanism, building a simulation curve and determining position information and nailing direction of a nailing point, and the aiming mechanism is used for adjusting nailing position and nailing direction of a channel screw. Thepositioning system and the working method are precise, quick, simple and easy to learn, so that damage caused by X-rays during operation is avoided.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a nail positioning system and working method for minimally invasive treatment of pelvic fractures. Background technique [0002] Many accidental injuries today threaten the personal safety of the people. Pelvic fractures are a common form of trauma, which is characterized by high-energy injuries. The pelvis contains multiple systems such as digestion, urology, reproduction, circulation, and movement. There are rich soft tissues and various types of injuries. , often involving the above multiple systems, seriously threatening life safety. [0003] At present, for some types of pelvic fractures, closed reduction and internal fixation are often used for treatment, and the operation method of percutaneous minimally invasive screw insertion can greatly reduce the surgical trauma of patients, reduce hospitalization costs and time, and reduce the Surgical risk, good for recov...

AI Technical Summary

Problems solved by technology

Under minimally invasive conditions, it is impossible to look directly at the operative field. If you need to place screws accurately, you need to rely on multiple angles of X-ray perspective for positioning. This requires the operator to be proficient in pelvic anatomy and fluoroscopy position. A large number of X-ray fluoroscopy, large radiation, time-consuming, labor-intensive, increasing the damage to doctors and patients

In addition, the image obtained by X-ray is an image with overlapping planes, which cannot fully reflect the spatial relationship between the screw and the pelvis, so there is a chance that the screw position will shift and serious consequences will occur

Percutaneous nail placement is difficult to learn and has a long learning curve, which is also one of the reasons why this type of surgery is difficult to popularize

[0005] The inventor also found that a lot of research has been done on the method of percutaneous nail placement for a long time, most of which are mainly focused on the anatomical research of the pelvis or the development of external fixation systems, which are all empirical research and cannot achieve individualized and precise positioning

At present, surgical robots can achieve fast and accurate positioning through imaging system acquisition and computer-controlled robotic arms. There are also manufacturers in China, but the equipment and use costs are extremely high, and they are not universal.

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