Design And Research Of Three Dimensional Ultrasonic Intramuscular Injection Instrument Based On Optical Positioning System

Muscle spasms are involuntary muscle hypermobility and are likely to be complicated in patients with damage to the central nervous system.Currently,botulinum toxin（BT）is commonly used as an effective treatment for the affected muscle（target muscle）.By injecting botulinum toxin into the target spastic muscle,the tone of the affected muscle can be reduced in time and the function of the affected muscle can be restored by further treatment.When BT injections are performed,if the injection location and depth of injection do not reach the target muscle accurately,it may not only increase the patient’s pain,but may also cause other side effects such as temporary loss of normal function of the nearby muscles.Therefore,the process of accurately calibrating the target muscle location in advance by 2D ultrasound images and guiding the arrival of the injection needle is the key to performing muscle spasm treatment surgery,however,the 2D ultrasound imaging process still faces problems such as non-visibility of the injection target and imprecise injection guidance.With the maturation and development of real-time dynamic imaging technology,the introduction of optical positioning technology into 3D ultrasound imaging systems has solved the problems of high operator demand and unintuitive recognition of injection location in 2D ultrasound imaging.However,in the process of introducing optical positioning technology,some problems have not been solved in time and properly,such as the problem of fixing some small optical positioning sensing devices on medical devices and the problem of spatial distribution of display output devices,which make it difficult for the system to play the expected role in actual operation and adversely affect the process of intramuscular injection therapy,causing a burden for medical personnel in the actual operation.The actual operation process has created a burden for medical personnel.Therefore,based on the calibration principle of optical positioning system,this paper will take Polaris optical positioning system produced by Canadian NDI（Northern Digital Inc）as the basis of research,combine the existing ultrasound imaging navigation equipment in the actual demand,take intramuscular injection surgery as the application research object,and start from the perspective of industrial design,through requirement analysis and functional Through the requirements analysis and functional modeling,the node network of functional flow components constituting the target product is modeled,and a complex network node importance evaluation method based on multi-attribute decision making is used to refine the functional components as the focus of design work,transforming the overall product functions and requirements into a modular structure problem,and further integrating and optimizing the structure of the3 D ultrasonic muscle injector based on optical positioning.Through the above study,the complex requirements are simplified into corresponding functional components,and based on the results of component evaluation,the three parts of rotatable support arm,load box and guide rail are taken as the main design entry points for priority design,and the subsequent means of connection with other components are selected and integrated according to the design presentation of the module structure.Through the functional framework of the system,the design objectives were to reduce the difficulty of preoperative preparation,to reduce the workload of medical staff,to provide a more convenient working environment,and to shorten the time required to complete the injection compared with the existing equipment and instruments,and to design the relevant auxiliary products after taking into account the human body size and human-machine interaction.And finally,through Jack Human Factors Engineering Virtual Simulation Software,the information output efficiency and comfort of the display connected to the arm were simulated and tested to verify the feasibility of the product solution to reduce the workload,and to establish an evaluation index system for the overall product based on the subjective evaluation method of hierarchical analysis,and to verify the rationality and feasibility of the solution through expert scoring.