Abstract
This design describes a mobile prototype for detecting silent aspiration in children, people with neurological disorders using various biosignals such the measurement of the respiratory rate, pulse rate and oxygen saturation. Pulmonary Aspiration is when food or other particles enter from the pharynx into the larynx, often leading to pneumonia or rarely, fatal asphyxiation. In some patients with dysphagia, silent aspiration occurs, where the aspirating patient does not show any sign such as coughing at all. It is common in stroke patients and infants with neurological disorders such as down syndrome and cerebral palsy. The prototype provides signals that can be displayed with NI-myDAQ (LabVIEW). The signals are acquired with the help of a prototype respiratory belt tied around the chest containing a piezo sensor that senses pressure sending electric signals that will help analyse the breath pattern of the patient. The prototype is fitted with a sensor for measuring the pulse rate of the patient through photoplethysmography. They are all connected to a primary Arduino Nano Microcontroller based on the ATmega328P. Housed in a portable container which also contains an LCD display that can display the real time data. The device has an alert system by means of an LED and a Buzzer, the LED signals whenever there’s a pressure and the alarm sounds when there is a gap in the respiratory movement of the patient due to aspiration.
Highlights
Cerebral Palsy is a neurological disorder that occurs in the womb and during birth that causes impairment to the movement of the infant, the condition is lifelong
Our device aims to find the time at which aspiration occurs by means of analysis of the respiratory movement during normal swallowing and the difference that occurs during the phenomenon of aspiration along with the changes in other factors such as pulse rate and movement data of the chest
The data from the piezo sensor is acquired through NI-myDAQ and analysis is done through LabVIEW, where each movement exhibits a downward movement in the waveform
Summary
The prototype is designed to detect silent aspiration by the analysis of respiration rate and the pulse rate. There are three steps of analysis, that are:. Acquiring respiratory movement and rate data, which is acquired by the piezo sensor. Pulse rate acquired using the pulse rate sensor by means of photoplethysmography
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