Knee joint model capable of demonstrating pressure change in knee joint cavity in KOAPT movement

Abstract

The invention discloses a knee joint model capable of demonstrating pressure change in a knee joint cavity in KOAPT movement. The model comprises a thighbone structure and a tibia structure, the thighbone structure comprises an upper thighbone structure and a lower thighbone structure which are vertically and hermetically connected, and a communicating pipe is embedded in the thighbone structure; the tibia structure comprises an upper tibia structure and a lower tibia structure which are hermetically connected up and down; a cylindrical elastic film which is used for simulating a knee joint synovial membrane and is provided with openings at two ends is sleeved between the lower thighbone structure and the upper tibia structure in a sealing manner, so that a completely sealed knee joint cavity is formed in the elastic film; artificial synovial fluid is injected into the communicating pipe into the knee joint cavity, the thighbone structure is swung, knee pain inducing movement is demonstrated, and the pressure change in the knee joint cavity is detected through the pressure meter connected with the top end of the communicating pipe. According to the invention, the blank that various knee joint models do not simulate the knee joint cavity and synovial fluid is filled up, and the pressure change in the joint cavity during knee pain inducing movement is clearly and intuitively demonstrated.

Description

technical field [0001] The invention belongs to the technical field of demonstrable medical models, and specifically refers to a model that can demonstrate the pressure change in the knee joint cavity during KOAPT movement. Background technique [0002] Knee osteoarthritis (KOA) is an all-round, multi-layered and varying degree of inflammation with the degenerative changes of knee cartilage as the core, often involving the bone and including the synovium, joint capsule and other structures of the joint. Sterile, chronic, progressive disease of the joints. With the intensification of population aging in modern society, the incidence of KOA is increasing year by year. According to an epidemiological survey in my country, the prevalence of KOA in people aged 60-75 is 50%, and the incidence in people over 75 is as high as 80%. Patients with KOA are often disabled due to pain and limited walking activities, and the ultimate disability rate is 53%. Pain, as the most important s...

AI Technical Summary

Problems solved by technology

For example: artificial joint replacement surgery has quick results, but patients often suffer from subjective discomfort of the knee joint after surgery, coupled with osteoporosis in the elderly, they are prone to periprosthetic fractures, and there is also the problem of difficult recovery after surgery; Arthroscopic treatment has small wounds and is easy to recover, but there is a possibility of re-exacerbation in the later stage; intra-articular injection of sodium hyaluronate in non-surgical treatment is often an adjuvant treatment plan, which can cure the disease in a very short period of time. By improving the internal environment of the knee joint, it relieves symptoms and slows down the development of the disease. In the early stage, there is a good therapeutic effect, but with the gradual development of the disease, its curative effect will decline; although intra-articular injection of PRP in the treatment of KOA has achieved It has a certain curative effect, but there are still many potential problems: 1. The indications are not clear; 2. The factors in PRP that have a protective effect on chondrocytes are not yet clear; 3. The preparation standard of PRP, injection times, injection dose, There are still large differences in interval time and evaluation indicators, and there is no uniform standard; 4. The follow-up time of most clinical studies is short, and its long-term efficacy is still unclear; 5. The curative effect of PRP shows a downward trend over time. After more than 6 to 9 months of PRP, its effect of relieving pain and improving function begins to decline, and the effect further declines after 24 months; 6. The adverse reactions of long-term use are still unclear

[0008] At present, none of the existing knee joint models can simulate the knee joint cavity and synovial fluid, and it is impossible to use the existing knee joint models to demonstrate the pressure changes in the knee joint cavity when exercising to induce knee pain

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