Pautas ergonómicas para la interacción persona ordenador. Diseño y uso de sistemas para el acceso a las tic de usuarios con grandes discapacidades motoras.

Las personas con grandes discapacidades motoras pueden alcanzar un acceso ordinario a las TIC a través de productos de apoyo, como son los sistemas de acceso al ordenador basados en visión por ordenador que detectan el movimiento de la cabeza. Los requisitos y recomendaciones ergonómicos habituales no recogen situaciones como estas, que implican nuevos elementos en el equipo de trabajo y en los que las personas que utilizan el ordenador presentan diversidad de posturas y adaptaciones al esfuerzo. Se pretende identificar las condiciones ergonómicas adecuadas para el uso de dispositivos de entrada de datos basados en visión por ordenador mediante la detección de movimientos de la cabeza, concretamente el SINA, por parte de personas con grandes discapacidades motoras, para establecer las pautas necesarias para garantizar un mínimo esfuerzo físico al usar el ordenadorPeople with severe disabilities can achieve regular access to technologies by means of assistive technologies, such as alternative input devices. This is the case of human computer interaction (HCI) by means of vision-based hands-free input devices using head movement detection, specifically SINA, which is the focus of this research. Ergonomic requirements and recommendations are addressed to anthropometric and demographic standard users, equipments and workstations. They neither cover HCI with input devices that involve new equipment elements such as the camera that detects motion, nor present specific recommendations for people with diversity of postures and movements in their interaction with the computer. This research aims to identify the appropriate ergonomic conditions for the use of vision-based hands-free input devices using head movement detection by people with severe motor disabilities, as well as setting guidelines to ensure minimal physical effort for the target user population

The evolution of the ventilatory ratio is a prognostic factor in mechanically ventilated COVID-19 ARDS patients

Background: Mortality due to COVID-19 is high, especially in patients requiring mechanical ventilation. The purpose of the study is to investigate associations between mortality and variables measured during the first three days of mechanical ventilation in patients with COVID-19 intubated at ICU admission. Methods: Multicenter, observational, cohort study includes consecutive patients with COVID-19 admitted to 44 Spanish ICUs between February 25 and July 31, 2020, who required intubation at ICU admission and mechanical ventilation for more than three days. We collected demographic and clinical data prior to admission; information about clinical evolution at days 1 and 3 of mechanical ventilation; and outcomes. Results: Of the 2,095 patients with COVID-19 admitted to the ICU, 1,118 (53.3%) were intubated at day 1 and remained under mechanical ventilation at day three. From days 1 to 3, PaO2/FiO2 increased from 115.6 [80.0-171.2] to 180.0 [135.4-227.9] mmHg and the ventilatory ratio from 1.73 [1.33-2.25] to 1.96 [1.61-2.40]. In-hospital mortality was 38.7%. A higher increase between ICU admission and day 3 in the ventilatory ratio (OR 1.04 [CI 1.01-1.07], p = 0.030) and creatinine levels (OR 1.05 [CI 1.01-1.09], p = 0.005) and a lower increase in platelet counts (OR 0.96 [CI 0.93-1.00], p = 0.037) were independently associated with a higher risk of death. No association between mortality and the PaO2/FiO2 variation was observed (OR 0.99 [CI 0.95 to 1.02], p = 0.47). Conclusions: Higher ventilatory ratio and its increase at day 3 is associated with mortality in patients with COVID-19 receiving mechanical ventilation at ICU admission. No association was found in the PaO2/FiO2 variation

Pautas ergonómicas para la interacción persona ordenador. Diseño y uso de sistemas para el acceso a las tic de usuarios con grandes discapacidades motoras

Las personas con grandes discapacidades motoras pueden alcanzar un acceso ordinario a las TIC a través de productos de apoyo, como son los sistemas de acceso al ordenador basados en visión por ordenador que detectan el movimiento de la cabeza. Los requisitos y recomendaciones ergonómicos habituales no recogen situaciones como estas, que implican nuevos elementos en el equipo de trabajo y en los que las personas que utilizan el ordenador presentan diversidad de posturas y adaptaciones al esfuerzo. Se pretende identificar las condiciones ergonómicas adecuadas para el uso de dispositivos de entrada de datos basados en visión por ordenador mediante la detección de movimientos de la cabeza, concretamente el SINA, por parte de personas con grandes discapacidades motoras, para establecer las pautas necesarias para garantizar un mínimo esfuerzo físico al usar el ordenador.People with severe disabilities can achieve regular access to technologies by means of assistive technologies, such as alternative input devices. This is the case of human computer interaction (HCI) by means of vision-based hands-free input devices using head movement detection, specifically SINA, which is the focus of this research. Ergonomic requirements and recommendations are addressed to anthropometric and demographic standard users, equipments and workstations. They neither cover HCI with input devices that involve new equipment elements such as the camera that detects motion, nor present specific recommendations for people with diversity of postures and movements in their interaction with the computer. This research aims to identify the appropriate ergonomic conditions for the use of vision-based hands-free input devices using head movement detection by people with severe motor disabilities, as well as setting guidelines to ensure minimal physical effort for the target user population

Camera-based Monitoring of Neck Movements for Cervical Rehabilitation Mobile Applications

[eng] Vision-based interfaces are used for monitoring human motion. In particular, camera-based head-trackers interpret the movement of the user's head for interacting with devices. Neck pain is one of the most important musculoskeletal conditions in prevalence and years lived with disability. A common treatment is therapeutic exercise, which requires high motivation and adherence to treatment. In this work, we conduct an exploratory experiment to validate the use of a non-invasive camera-based head-tracker monitoring neck movements. We do it by means of an exergame for performing the rehabilitation exercises using a mobile device. The experiments performed in order to explore its feasibility were: (1) validate neck's range of motion (ROM) that the camera-based head-tracker was able to detect; (2) ensure safety application in terms of neck ROM solicitation by the mobile application. Results not only confirmed safety, in terms of ROM requirements for different preset patient profiles, according with the safety parameters previously established, but also determined the effectiveness of the camera-based head-tracker to monitor the neck movements for rehabilitation purposes