Design of an electrically stimulated shoulder orthosis for monitoring shoulder dislocation
Objective Shoulder dislocation is one of the common diseases in orthopedics.The condition is frequently occurring and predominantly affects young adult males.Due to the inability to closely follow up on the rehabilitation process in clinical settings,the recurrence rate of the condition is high,leading to poor rehabilitation outcomes.To address this issue,this article presents the design of a shoulder orthosis that can monitor the status of shoulder dislocation and incorporate electrical stimulation functionality.Methods The main body is made of neoprene material,and the shoulder orthosis is custom-fitted for the subjects and optimized.Then,by using Hall sensors and visualization components,we design a monitoring circuit that intuitively displays the position of shoulder dislocation.An electrical stimulation circuit is designed by using a 555 timer to work in conjunction with the monitoring circuit,and pulse electrical stimulation is delivered through an electrical stimulation pad.A misoperation judgment program is written,and misoperations are eliminated via a microprocessor.Results The shoulder orthosis restricts the subject's shoulder movements within a relatively safe range,showing significant orthopedic rehabilitation effects.The monitoring circuit tracks the position of the shoulder joint in real-time through four monitoring points and displays this via corresponding visualization components,offering high sensitivity and good repeatability.The electrical stimulation module,working in conjunction with the monitoring circuit,delivers low-frequency pulses at 4.3 volts and 44 Hz.The microprocessor can eliminate false trigger signals by controlling the duration of pin triggering.Counclusions The shoulder orthosis with electrical stimulation for real-time monitoring of shoulder dislocation provides flexible support and has incorporated Hall sensors and electrical stimulation devices to form a preliminary closed-loop rehabilitation system for shoulder joints,from assessment to adjustment.The design is practical and feasible,enhancing rehabilitation efficiency and creating a continuous and dynamic rehabilitation process,which assists in the timely clinical follow-up of the rehabilitation process.
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