The intra-articular injection model of the knee joint is a simulation training tool specially designed for orthopedics, rehabilitation departments and clinical teaching, used to help medical students, resident physicians and rehabilitation therapists master the operation skills and anatomical positioning of knee joint injection. This model is made based on the structure of the human knee joint, fully presenting key parts such as the femur, tibia, patella and joint capsule. At the same time, it simulates the space within the knee joint cavity and the resistance of soft tissues, making the injection process closer to the real clinical experience. Some high-end models are also equipped with liquid reflux or pressure feedback systems to verify the accuracy of the needle position.

When in use, the model should first be inspected to ensure that the joint structure is intact and the joint capsule material is undamaged. Before operation, prepare syringes, needles, disinfectants and simulated liquid medicine, and keep the operation environment clean. During practice, trainees should first confirm anatomical landmarks such as the patella, patellar ligament and joint space through palpation, and then select the appropriate needle insertion point, which is generally located in the joint space around the patella. The needle should be slowly inserted into the joint cavity at the correct Angle to feel the change in resistance when the needle tip enters the cavity. If necessary, the position of the needle tip can be confirmed through the model feedback system.

After the operation is completed, the syringe should be properly recycled and the surface of the model should be cleaned to maintain its long-term usage effect. The intra-articular injection model of the knee joint not only provides a safe and repeatable environment for clinical skills training, but also helps learners master injection techniques proficiently, enhance tactile experience, and lay a solid foundation for clinical treatment and rehabilitation operations.