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Liner trial mold used for unicompartmental knee arthroplasty operation and matched use method

A technique for unicondylar replacement and surgery, which is applied to knee joints, elbow joints, joint implants, etc. It can solve the problems of high energy consumption, two or more operations, and many surgical steps for medical staff, and reduce labor intensity. , Avoid potential safety hazards, strong interchangeability

Pending Publication Date: 2019-01-18
NANYANG CITY CENT HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The researchers found that in the current technology, due to the many surgical steps, the medical staff consume a lot of energy, and the passive injury to the patient occurs from time to time during the operation. Specifically, the measurement of the distance between the femur and the tibia is not completed at one time. It takes two times or even more. During this process, the reciprocating in and out of the trial mold may easily cause damage to the related ligaments. In particular, the process of debugging is often accompanied by the removal of the trial mold. When medical staff forget to take out the steps , the damage caused is irreversible

Method used

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  • Liner trial mold used for unicompartmental knee arthroplasty operation and matched use method
  • Liner trial mold used for unicompartmental knee arthroplasty operation and matched use method
  • Liner trial mold used for unicompartmental knee arthroplasty operation and matched use method

Examples

Experimental program
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Embodiment 1

[0036] Embodiment 1, design a kind of knee joint unicompartmental replacement surgery liner trial model, as Figures 1 to 4 , the two ends of the connecting rod 2 are respectively connected to the handle 1 and the trial unit 3, the trial unit 3 includes an elastic sheet 7 that automatically adjusts the thickness and sends out an alarm, the thread connection 4 between the trial unit 3 and the handle 1; the surface of the trial unit 3 It includes a hard chassis surface and a prismatic surface 9 made of flexible materials. The prismatic edges are provided with supports. The elastic sheet 7 is located in the prismatic inner cavity. The two sides of the elastic sheet 7 are provided with positioning slots 10 .

[0037] The width of the elastic sheet 7 corresponds to the width of the internal cavity to be divided into an internal liquid cavity 11 and an external liquid cavity 8, and a check valve 12 is provided between the internal liquid cavity 11 and the external liquid cavity 8 to ...

Embodiment 2

[0049] Embodiment 2, this embodiment sees Figure 5 , and the difference with embodiment 1 is that it also includes a liquid-type measurement bypass, the liquid-type measurement bypass includes a sealed liquid storage tank 16, the liquid storage tank 16 is connected to the liquid inlet pipeline and the liquid outlet pipeline, and the other part of the liquid inlet pipeline One end communicates with the internal liquid chamber 11, and the other end of the liquid outlet pipe communicates with the external liquid chamber 8. A flow measurement element 15 is also provided on the liquid outlet pipe to calculate the deformation and displacement of the elastic sheet 7. On the liquid type measurement bypass A valve is also provided to control the opening and closing of the liquid inlet pipe and the liquid outlet pipe. The measurement of the gap value is replaced by a liquid-type measurement bypass, which is determined by measuring the change in the volume space on both sides of the elast...

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Abstract

The invention provides a liner trial mold used for unicompartmental knee arthroplasty operation and a matched use method. The liner trial mold is used for solving the problem that the trial mold of the pad is easy to damage the peripheral ligament and fascia in the prior art. The two ends of the connecting rod in the invention are respectively connected with a handle and a mold test unit. The moldtest unit comprises an elastic sheet which automatically adjusts the thickness and sends out an alarm. The mold test unit is threadably connected with the handle. The surface of the test mold unit comprises a hard bottom disk surface and a prismatic surface made of a flexible material, wherein the prismatic edge is provided with a support, the elastic sheet is arranged in the prism-shaped internal cavity, and the two sides of the elastic sheet are provided with positioning clamping grooves. The surface of the test mold unit comprises a hard bottom disk surface and a prismatic surface made offlexible material. The liner trial mold has the advantages of avoiding the potential safety hazard caused by forgetting to pull out the test mold of the cushion, being light in material, convenient inuse and convenient for medical personnel to observe and obtain the results.

Description

technical field [0001] The invention relates to the field of medical operation equipment, in particular to a pad test mold for knee joint unicondylar replacement operation and a matching method of use. Background technique [0002] The knee joint is divided into three compartments: medial, lateral, and patellofemoral. Knee degenerative arthritis can affect any one of these compartments, and 1 / 3 of patients with knee arthritis have early lesions limited to only one compartment. The current surgical methods for the treatment of unicompartmental arthritis include unicompartmental arthroplasty, high tibial osteotomy, and total knee arthroplasty. High tibial osteotomy is mainly used as a transitional treatment to total knee arthroplasty, which has the disadvantages of incomplete relief of symptoms and short duration of curative effect, and is rarely used in older people. However, unicompartmental arthroplasty has attracted more and more attention due to the improvement of prost...

Claims

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Application Information

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IPC IPC(8): A61F2/38A61F2/46
CPCA61F2/38A61F2/461A61F2/4657A61F2002/4666A61F2002/4661
Inventor 张长成刘瑜孙子路刘舒王峰
Owner NANYANG CITY CENT HOSPITAL