Individual orthopedics department positioning sheet based on medical images

A positioning sheet and orthopedic technology, applied in the field of medical devices, can solve the problems of difficulty in obtaining authoritative evaluation of safety and reliability, difficult for patients and doctors to accept fully automatic surgery, complicated installation, debugging, and complicated disinfection, so as to shorten the design and manufacturing time. , The effect of reducing related surgical steps, reducing prosthesis size selection and alignment errors

Inactive Publication Date: 2015-05-20
SHANGHAI XINJIAN MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, navigation technology also has some recognized disadvantages: ①Input of bony landmark points is required during the operation, which prolongs the operation time; ②The positioning of bony landmark points is still based on naked eye judgment and needs to rely on the experience of doctors ;③Navigation technology is to measure the force line of the lower limbs under the condition of non-weight bearing, and the result is different from that under weight bearing;④The patella is in a state of complete dislocation when the navigation technology measures, which does not help the osteotomy of the patella;⑤The navigation system itself has Instability, and the cost of surgery is high, and it is still difficult to promote widely in clinical practice
However, it cannot be denied that the robot-assisted surgery system still has some limitations: ①The cost of equipment is high, and operations such as installation, commissioning, and disinfection are relatively complicated; Accept fully automatic surgery; ③ There will be some problems with the anti-interference ability and stability of electronic instruments, once an emergency occurs, the consequences will be unimaginable; ④ The flexibility and accuracy of surgical operations still need to be improved; ⑤ Current surgical robots The speed of automatic bone cutting is very slow, prolonging the operation time and increasing the blood loss of patients

Method used

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  • Individual orthopedics department positioning sheet based on medical images
  • Individual orthopedics department positioning sheet based on medical images
  • Individual orthopedics department positioning sheet based on medical images

Examples

Experimental program
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Embodiment 1

[0045] figure 1 A flow chart of the system for making orthopedic positioning piece for knee joint replacement and its design is shown in the present invention.

[0046] The specific implementation steps are as follows:

[0047] Step 1, lower limb data acquisition: CT / MRI scan (or other medical imaging methods) is performed on the lower limb (or some structural features) of the patient, and the scanned data is saved in DICOM or other formats. The doctor logs into the design system and imports the data into the background data management module.

[0048] Step 2, 3D reconstruction of lower extremities: Import CT / MRI or other medical image data (or partial structural features) of patients stored in the background database into the 3D reconstruction module, and perform preprocessing of 2D images by means of filtering, noise reduction, etc. Then set the grayscale threshold according to the joint contour, perform image segmentation on the corresponding selected area on the transver...

Embodiment 2

[0054] Embodiment 2 introduces the steps and method of designing a composite locator by using the orthopedic locator aided design system, wherein steps 1-3, 5 are the same as those in embodiment 1, and will not be repeated here, only steps 4, 6 will be described in detail.

[0055] Step 4: Orthopedic positioning piece design and production: After completing the preoperative planning, import the prepared preoperative planning plan into the orthopedic positioning piece design and manufacturing module to facilitate the design of femoral and tibial osteotomy positioning pieces. According to the position of the femoral and tibial prosthesis and the size of the osteotomy determined by the above preoperative planning, the placement position of the four-in-one osteotomy is determined, and then the positioning hole and the position of the osteotomy plane on the four-in-one osteotomy are determined. Determine the axial position of the positioning hole of the composite orthopedic position...

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Abstract

The invention discloses an individual orthopedics department positioning sheet based on the medical image three-dimensional reconstruction and computerized design technology. The individual orthopedics department positioning sheet is manufactured based on 3D printing or other machining methods and is used for knee prosthesis. The positions of key positioning holes and cutting faces in knee prosthesis are particularly and accurately determined. Firstly, a skeleton model is reconstructed based on medical images; preoperative planning is carried out on the reconstructed model so as to determine important parameters of a lower extremity force line, a thighbone rotating shaft, an osteotomy reference point and the like and simulate osteotomies and prosthesis imbedding; by means of the results, the positioning sheet (in a single positioning type or a composite type) is determined and designed; a doctor logs into a data management module to query data. The single positioning type positioning sheet is formed by thickening and punching on an extraction face of the reconstructed model; the composite positioning sheet is a combination of the single positioning type positioning sheet and an osteotomy device, and the osteotomy positioning function is achieved. By means of the positioning sheet designed through an auxiliary system, the lower limb force line can be accurately reconstructed, and accurate osteotomies can be achieved; an informatization management method is provided by the data management module for operations, and convenience is brought to data storage and querying.

Description

technical field [0001] The present invention relates to the technical field of medical devices, in particular to a personalized orthopedic positioning piece for knee joint replacement surgery based on medical image three-dimensional reconstruction technology and computer-aided design technology, using 3D printing or other processing methods, and a positioning piece auxiliary design system . Background technique [0002] With the aging of society, osteoarthritis has become one of the most common bone and joint diseases in humans. The third National Health and Nutrition Examination Survey (NHANES) estimates that about one-third of people aged 60 and over suffer from primary osteoarthritis. For surgeons, this is undoubtedly a growing burden. At the same time, in a certain sense, knee replacement has high requirements for surgical skills and postoperative rehabilitation of patients, and it is still a major medical problem. At present, total knee replacement (Total Knee Replac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B19/00
Inventor 不公告发明人
Owner SHANGHAI XINJIAN MEDICAL TECH
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