Research And Design On Esophagus Pacing System Based On Embedded System

Achalasia is an unknown etiology of esophageal motility disorders,frequently occurring in the 20-50 years age group.The main features of the disease are disorders of the lower esophageal sphincter relaxation,absence of peristaltic esophageal body contraction during swallowing.Clinical manifestations include difficulty in swallowing,pain,gastro esophageal reflux and other symptoms and these symptoms seriously affect the quality of lives of patients.A esophagus pacing system based on multi-channel electrical stimulation was designed in this paper.Low power MSP430 was adopted as the core processor in the system.Functions of stimulation pulses generation,multi-channel output and adjustment of pulses parameters were implemented through processing the front-end pulse generating signal and controlling the low power precision voltage controlled current circuit with software precision delay technology.The researches mainly include the followed aspects:1.Designed the esophagus pacing system based on embedded system and completed the division of functional modules.2.Completed the acquisition and processing of swallowing signal circuit and built the structure of esophageal pacing system circuit.3.Designed the stimulation generation circuit and output circuit by the use of low-power MSP430 microcontroller and realized the stimulation pulse generation,multi-channel stimulation output.4.Designed the control display module and made the parameters adjustable.Designed wireless data transmission module and realized the communication between different modules.5.Built the esophagus pacing experiment system and completed the performance parameters experiments to verify the correctness and feasibility of the system.