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THA surgical guide plate

A technology of guide plate and surgery, which is applied in the field of THA surgical guide plate and its construction, and can solve problems such as surgical failure

Pending Publication Date: 2020-05-15
SHANGHAI NINTH PEOPLES HOSPITAL SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The orientation of the acetabular cup is a three-dimensional space angle, and the operation largely depends on the experience of the doctor. Therefore, the failure of the operation due to the position and direction error of the acetabular cup prosthesis is a major risk in THA surgery

Method used

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Examples

Experimental program
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preparation example Construction

[0062] The second aspect of the present invention provides a method for preparing a THA surgical template, said method comprising: constructing the obtained THA surgical template model according to the construction method of the THA surgical template model provided by the first aspect of the present invention, and preparing the THA surgical template. The method of preparing the THA surgical guide plate according to the model should be known to those skilled in the art, for example, methods such as 3D printing can be used, and for example, the material used in the 3D printing process can be photosensitive resin, etc. .

[0063] The third aspect of the present invention provides a THA surgical guide, which is constructed by the construction method of the THA surgical guide model provided in the first aspect of the present invention, or prepared by the preparation method of the THA surgical guide provided by the second aspect of the present invention.

[0064] Such as figure 1 ,...

Embodiment 1

[0082] 1) Segmentation of the hip joint

[0083] The hip joint was segmented and reconstructed based on the patient's preoperative CT images (using Mimics software). The pelvis and femur are segmented using a spherical mask. The specific method is to use a small ball to simulate the shape of the acetabulum. The size of the small ball matches the femoral head, which is slightly larger than the femoral head and smaller than the acetabulum. Pixels are defined as non-pelvic pixels, so as to realize the segmentation of pelvis and femur, specifically as Figure 5 shown.

[0084] 2) Define the pelvic coordinate system

[0085] The coordinate system of the pelvis is used to plan the orientation of the acetabulum, i.e. anteversion and abduction. Two important planes are involved, the anterior pelvic plane and the midsagittal pelvic plane. Among them, the front plane of the pelvis is tangent to the anterior superior iliac spine and the pubic tubercle, and the mid-sagittal plane of t...

Embodiment 2

[0096] The guide plate was constructed according to the steps given in Example 1. During the construction process of the guide plate, the preset forward inclination was 20° and the abduction was 40°.

[0097] During the operation, after anesthesia, in the lateral position, routine disinfection and draping, posterolateral approach, incision of the skin, subcutaneous and deep fascia layer by layer, exposure and incision of the joint capsule, dislocation of the hip joint, femoral neck osteotomy, The femoral head was removed, the glenoid was fully exposed, and the synovium, labrum of the acetabular rim, and soft tissue of the horseshoe fossa were cleaned.

[0098] With the horseshoe fossa, anterior superior and posterior superior part of the acetabulum in full contact with the guide plate, place a Kirschner wire in the guide hole, locate the center of the acetabulum and the orientation of the opening of the acetabular cup, pass through the positioning hole, and perform hip surgery ...

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Abstract

The invention relates to the field of medical apparatus and instruments, and especially relates to a THA surgical guide plate and a construction method thereof. The construction method of the THA surgical guide plate model includes the following steps: providing the three-dimensional model of a to-be-repaired part; constructing a guide plate body based on the surface of acetabulum and the outer side surface of iliac ala adjacent to the acetabulum; constructing a guiding part, wherein the guiding part includes a guiding hole, the guiding hole faces toward the outer side surface of the iliac ala, and the extension direction of the guiding hole is consistent to the expected orientation of acetabulum cup prosthesis; constructing a positioning hole based on a marking point on the surface of theacetabulum, wherein the positioning hole extends to the marking point along the outer side of the guide plate body; and constructing a holding part based on the outer side of the guide plate body. During THA surgery, the provided THA surgical guide plate can guide doctors to determine the placing positions and orientations of the acetabulum cup prosthesis, so that the placing precision of the acetabulum cup prosthesis can be enhanced, surgery failure rates can be reduced, and patients can be guaranteed that more comfortable living experience can be achieved after recovery.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a THA surgical guide plate and a construction method thereof. Background technique [0002] Hip replacement is a treatment method to relieve hip pain, correct deformity, restore and improve joint movement function, also known as artificial hip replacement (THA), is the use of artificial prosthesis to replace the diseased joint, including the femoral part and acetabulum Part, in order to achieve the purpose of reconstructing the patient's hip joint. For the acetabular side, the success of the procedure depends on the position and orientation of the acetabular cup prosthesis implanted during the operation, that is, the anteversion angle, abduction angle, and placement point of the acetabular cup. The orientation of the acetabular cup is a three-dimensional space angle, and the operation largely depends on the experience of the doctor. Therefore, the failure of the operation due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/46
CPCA61F2/4609A61F2002/4687
Inventor 王燎艾松涛严孟宁吴海山戴尅戎
Owner SHANGHAI NINTH PEOPLES HOSPITAL SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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