The new knot-tying training model is an improved teaching aid specifically designed for surgical suturing and knot-tying training. Its "newness" mainly lies in three aspects: material, structural design and functional experience.

Firstly, in terms of materials, the new models mostly adopt high-molecular simulation materials or multi-layer composite tissue structures, which are closer to the elasticity and resistance of human tissues and can simulate the real feel, allowing trainees to gain an experience close to clinical practice during operation.

Secondly, in terms of structural design, the model has added multiple practice areas and replaceable modules. It can not only train conventional single knots and double knots, but also practice deep, narrow space and different Angle knotting techniques, meeting the multi-level training needs.

In addition, some models are equipped with transparent casings or visual Windows, which facilitate teachers' guidance and students' self-correction. Secondly, in terms of functional experience, the new knotting models emphasize reusability and interactive teaching. Some even integrate sensors or intelligent assessment systems, which can provide real-time feedback on the tensile force and the firmness of the knots, enhancing the scientific and standardized nature of the training.

Compared with traditional models, it places more emphasis on the restoration of clinical scenarios and the objectification of skills assessment, enabling trainees to repeatedly practice in a non-invasive environment, shortening the learning curve and reducing risks in actual operations. Therefore, the "newness" of the new knotting training model is not only reflected in the update of materials and design, but also in the progress of concepts and teaching methods, comprehensively enhancing the effect and quality of surgical skills training.