Wireless Recording of Limb Flexion-Extension Counter using GSM Module
Haritha Murali, P. Lakshmi Prabha, Aishwarya Nair and Vishal R. Nair

Department of Biomedical Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai, Tamil Nadu, India.

Corresponding Author E-mail: harithamurali13@gmail.com

Abstract: People belonging to different age groups who suffered fractures, temporary limb paralysis, paraplegia and monoplegia and various stages of hypertension (High BP) need to carry out physiotherapy to regain motor control in the limb(s). So this limb flexion extension counter can assist the subject to exercise properly and independently recover with ease. This device will help to monitor parameters such as heart rate, temperature and limb flexion-extension counts. Using GSM module the readings will be transmitted directly via SMS to the subject’s phone thus helping the individual to keep a record of their workout. The microcontroller used is ARDUINO MEGA 2560 which interfaces the temperature sensor LM35, IR Proximity Sensor for limb flexion-extension count and the pulse rate sensor SEN-11574 along with the GSM Module. A goniometer is used for measuring the angle made between the limbs. The pressure is applied on the arm using an inflatable cuff which acts as the load or stress for doing the exercise. On bending the forelimb, the IR sensor glows thus showing as a count. The pulse rate sensor shows the varying pulse rates during exercise. The cuff pressure is maintained between 30-50 mm of Hg. The conclusion is that pulse rate and temperature are directly proportional to each other from preliminary tests and using wireless recording it is easier for the subject to store and maintain record of his/her progress.

Keywords: Arduino Mega 2560; Cuff Pressure; Flexion-Extension; GSM Module; Physiotherapy

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