La prestation de soins critiques et d'orthophonie en milieu pédiatrique nécessite beaucoup de travail pour atteindre le niveau de soins souhaité. Plusieurs facteurs contribuent à ce problème, parmi lesquels la pénurie de ressources, les besoins pressants et l’augmentation du nombre d’enfants malades. Parmi les solutions proposées, beaucoup pensent que la télémédecine synchrone peut être utile en donnant un accès virtuel immédiat aux compétences à distance. Ainsi, l'expertise pourrait être instantanément disponible via une plateforme permettant une communication efficace et capable de soutenir les soins pédiatriques. La télémédecine s’est beaucoup développée dans la prestation des soins critiques et de réadaptation pédiatriques, et ce aux plans diagnostique et thérapeutique. Pourtant, peu d’études ont examiné la faisabilité et évalué l’impact de la télémédecine sur la qualité des soins critiques et de réadaptation pédiatrique. L'objectif principal de cette thèse était d'évaluer la faisabilité de la télémédecine synchrone dans deux contextes pédiatriques, critique et réadaptation, et d'évaluer son influence sur le processus de prestation de soins pédiatriques. Le premier article présente les résultats d'une revue systématique qui synthétisait des études évaluant l'impact des modèles de télémédecine synchrone sur les résultats cliniques dans les établissements de soins de courte durée en pédiatrie. Les résultats ont révélé que l’utilisation de la télémédecine synchrone avait pour effet d’améliorer la qualité des soins, de diminuer le taux de transfert, de réduire de la durée du séjour, de modifier ou renforcer le plan de soins médicaux, de réduire les complications et la gravité de la maladie, et de diminuer le taux de mortalité hospitalière et standardisé. Cependant, la revue de l’état de connaissances a révélé que la qualité des études incluses était faible et que des preuves de haute qualité étaient nécessaires. Le deuxième article, fondé sur un devis pré/post, évalue la faisabilité de la télémédecine à domicile en orthophonie et son impact sur la satisfaction des enfants et orthophonistes, le coût économique, et les performances vocales. Cette étude a montré que la télémédecine en orthophonie était faisable et que les enfants et les orthophonistes étaient satisfaits du service. En outre, l'utilisation de la télémédecine en orthophonie a permis d'améliorer la voix et de faire économiser de l'argent aux parents. Le troisième article évalue la faisabilité de la mise en place d’une plate-forme de télémédecine synchrone dans l’unité des soins intensifs pédiatriques (USIP). Pour qu'une solution de télémédecine synchrone à l’USIP soit faisable, elle nécessite une bonne préparation préalable à la mise en œuvre de la plate-forme de télémédecine synchrone pour être réellement utile. Avec des médecins résidents compétents et autonomes, l’utilité d’une plate-forme de télémédecine synchrone reliant les intensivistes pédiatriques hors site et les médecins résidents sur site à l’USIP est faible. Cette étude a ajouté qu'un tel service pourrait être plus bénéfique que le modèle traditionnel des soins (face à face) pour les communications avec d'autres établissements de soins de santé éloignés, où le besoin d'expertise d'un intensiviste en soins intensifs pédiatriques est plus important. Ces trois études permettent de conclure que la télémédecine synchrone est réalisable et peut avoir un impact sur la qualité des soins intensifs et de réadaptation pédiatrique. On peut déduire de cette thèse qu'il est important de prendre en compte le contexte dans lequel la technologie sera mise en œuvre. Traiter le contexte de l’USIP et celui de réadaptation de la même manière n'aboutit pas aux mêmes résultats et une innovation technologique pourrait réussir dans un contexte et échouer dans un autre. / Delivering critical and speech-language pathology care in pediatric settings requires much hard work to reach the desired level of care for children. Several factors contribute to this problem, including resources shortage, pressing needs, and the growing number of ill children. Among the proposed solutions, many believe that synchronous telemedicine can play a role by providing virtual and immediate access to remote skills, with expertise could be made instantly available through a platform that allows efficient communication and is able to support pediatric care. Telemedicine has developed significantly in the provision of critical care and pediatric rehabilitation in terms of diagnosis and therapy. Yet, few studies have examined the feasibility and evaluated the impact of telemedicine on the quality of pediatric critical care and rehabilitation. The main objective of this dissertation was to assess the feasibility of synchronous telemedicine in two pediatric settings—critical care and rehabilitation—and to evaluate its influence on the process of providing pediatric care. The first article presented the results of a systematic review that synthesized studies evaluating the impacts of synchronous telemedicine models on clinical outcomes in pediatric acute care settings. The findings revealed that the use of synchronous telemedicine improved quality of care and resulted in a lower transfer rate, a shorter length of stay, a change in or reinforcement of the medical care plan, a reduction in complications and illness severity, and a low hospital standardized mortality rate. However, the review of the state of knowledge revealed that the quality of the included studies was weak, so more high-quality evidences is needed. The second article, which used a pre/post design, assesses the feasibility assessed the feasibility of home-based telepractice in speech-language pathology (TSLP) and its impact on satisfaction among the children and speech-language pathologists, economic cost, and voice performance. This study showed that TSLP is feasible and that both the children and the speech-language pathologists were satisfied with the service. In addition, the use of TSLP demonstrated more voice improvement at less cost to the parents. The third article evaluated the feasibility of implementing a synchronous telemedicine platform in a pediatric intensive care unit (STEP-PICU). For a STEP-PICU to be feasible and truly helpful, it needs good preparation for the implementation of the telemedicine solution. With competent and autonomous fellows (a fellow is a physician who has completed their residency and elects to complete further training in a subspecialty), the usefulness of an synchronous telemedicine (STM) platform linking off-site pediatric intensivists and on-site fellows in a PICU is limited. This study added that such a service could be more beneficial than the traditional model of care (face to face) for communications with other remote healthcare facilities, where there is a greater need for the expertise of a pediatric critical care intensivist. These three studies allow us to conclude that STM is feasible and can have an impact on the quality of pediatric intensive care and rehabilitation. This thesis underscores the importance of taking into consideration the context in which the technology will be implemented. Treating the PICU and the rehabilitation contexts in the same way does not lead to the same results, and a technological innovation that succeeds in one setting may fail in another.

Global rise in life expectancy has resulted in an increased demand for affordable healthcare and monitoring services. The advent of miniature and low–power sensor technologies coupled with the emergence of the Internet–of–Things has paved the way towards affordable health monitoring tools in wearable platforms. However, ensuring power–efficient operation, data accuracy and user comfort are critical for such wearable systems. This thesis focuses on the development of accurate and computationally efficient algorithms and low–cost, unobtrusive devices with potential predictive capability for monitoring mobility and cardiac health in a wearable platform. A three–stage complementary filter–based approach is developed to realize a computationally efficient method to estimate sensor orientation in real–time. A gradient descent–based approach is used to estimate the gyroscope integration drift, which is subsequently subtracted from the integrated gyroscope data to get the sensor orientation. This predominantly gyroscope–based orientation estimation approach is least affected by external acceleration and magnetic disturbances. A two–stage complementary filter–based efficient sensor fusion algorithm is developed for real–time monitoring of lower–limb joints that estimates the IMU inclinations in the first stage and uses a gradient descent–based approach in the second stage to estimate the joint angles. The proposed method estimates joint angles primarily from the gyroscope measurements without incorporating the magnetic field measurement, rendering the estimated angles least affected by any external acceleration and insensitive to magnetic disturbances. An IMU–based simple, low–cost and computationally efficient gait–analyzer is developed to track the course of an individual's gait health in a continuous fashion. Continuous monitoring of gait patterns can potentially enable detecting musculoskeletal or neurodegenerative diseases at the early onset. The proposed gait analyzer identifies an anomalous gait with moderate to high accuracy by evaluating the gait features with respect to the baseline clusters corresponding to an individual’s healthy peer group. The adoption of a computationally efficient signal analysis technique renders the analyzer suitable for systems with limited processing capabilities. A flexible dry capacitive electrode and a wireless ECG monitoring system with automatic anomaly detection capability are developed. The flexible capacitive electrode reduces motion artifacts and enables sensing bio–potential over a dielectric material such as cotton cloth. The virtual ground of the electrode allows for obtaining single–lead ECG using two electrodes only. ECG measurements obtained over different types of textile materials and in presence of body movements show comparable performance to other reported ECG monitoring systems. An algorithm is developed separately as a potential extension of the software to realize automatic identification of Atrial Fibrillation from short single–lead ECGs. The association between human gait and cardiac activities is studied. The gait is measured using wearable IMUs and the cardiac activity is measured with a single–lead handheld ECG monitor. Some key cardiac parameters, such as heart rate and heart rate variability and physical parameters, such as age and BMI show good association with gait asymmetry and gait variation. These associations between gait and heart can be useful in realizing low–cost in–home personal monitoring tool for early detecting CVD–related changes in gait features before the CVD symptoms are manifested. / Thesis / Doctor of Philosophy (PhD) / Wearable health monitoring systems can be a viable solution to meet the increased demand for affordable healthcare and monitoring services. However, such systems need to be energy–efficient, accurate and ergonomic to enable long–term monitoring of health reliably while preserving user comfort. In this thesis, we develop efficient algorithms to obtain real–time estimates of on–body sensors' orientation, gait parameters such as stride length, and gait velocity and lower–limb joint angles. Furthermore, we develop a simple, low–cost and computationally efficient gait–analyzer using miniature and low–power inertial motion units to track the health of human gait in a continuous fashion. In addition, we design flexible, dry capacitive electrodes and use them to develop a portable single–lead electrocardiogram (ECG) device. The flexible design ensures better conformity of the electrode to the skin, resulting in better signal quality. The capacitive nature allows for obtaining ECG signals over insulating materials such as cloth, thereby potentially enabling a comfortable means of long–term cardiac health monitoring at home. Besides, we implement an automatic anomaly detection algorithm that detects Atrial Fibrillation with good accuracy from short single–lead ECGs. Finally, we investigate the association between gait and cardiac activities. We observe that some important cardiac signs, such as heart rate and heart rate variability and physical parameters, such as age and BMI show good association with gait asymmetry and gait variation.