Development and validation of a novel biofeedback system to assist patients during a partial weightbearing policy after lower extremity surgery

Introduction: In most cases of lower extremity surgery partial weight bearing is part of the revalidation phase. Patients tend to have problems with keeping the load within the prescribed weight bearing limits. To assist patients with their rehabilitation a novel low-cost biofeedback system is developed. This paper will focus on the development and validation of a new biofeedback system, which is called the ZoolMeet. Methods: The ZoolMeet device consists out of a data processing board with a Bluetooth module. The device is equipped with resistive pressure sensors attached to an insole, which can be placed in a patient’s own shoe. During this study the ZoolMeet will undergo several calibration and validation tests. This involves a static validation of the sensors and a dynamic validation of the devices. Results: The calibration showed that in a static situation the used sensors can measure constantly when measurements are repeated. These tests showed that the ZoolMeet can measure constantly in repeated dynamic measurements. Discussion: The ZoolMeet is thought to be able to provide feedback to a patient. Results indicated that the ZoolMeet can be used by patients with a lower extremity fracture at home.