Vision Transformer Customized for Environment Detection and Collision Prediction to Assist the Visually Impaired.

This paper presents a system that utilizes vision transformers and multimodal feedback modules to facilitate navigation and collision avoidance for the visually impaired. By implementing vision transformers, the system achieves accurate object detection, enabling the real-time identification of objects in front of the user. Semantic segmentation and the algorithms developed in this work provide a means to generate a trajectory vector of all identified objects from the vision transformer and to detect objects that are likely to intersect with the user's walking path. Audio and vibrotactile feedback modules are integrated to convey collision warning through multimodal feedback. The dataset used to create the model was captured from both indoor and outdoor settings under different weather conditions at different times across multiple days, resulting in 27,867 photos consisting of 24 different classes. Classification results showed good performance (95% accuracy), supporting the efficacy and reliability of the proposed model. The design and control methods of the multimodal feedback modules for collision warning are also presented, while the experimental validation concerning their usability and efficiency stands as an upcoming endeavor. The demonstrated performance of the vision transformer and the presented algorithms in conjunction with the multimodal feedback modules show promising prospects of its feasibility and applicability for the navigation assistance of individuals with vision impairment.

Miocardiopatía periparto: patología infrecuente de difícil diagnóstico / Peripartum cardiomyopathy: infrequent pathology of difficult diagnosis

Se presenta un caso de miocardiopatía periparto en paciente de 17 años de edad que evoluciona con un embarazode curso fisiológicoy que consulta al Servicio de Obstetricia con trabajo de parto prematuro y rotura espontánea de membranas (REM) de 8 horas de evolución. En el puerperio inmediato, luego de un parto vaginal con un sagarmiento excesivo, presenta elementos de hipotensión y taquicardía a los que rápidamente se agregan taquiarritmias supraventriculares y fenómenos de congestión pulmonar que no revierten a pesar del manejo antiarrítmico, la restitución de fluidos y las transfuciones de glóbulos rojos. Es trasladadaa la unidad de atenció intermedia en donde la ecografía revela elementos que permiten plantear el diagnóstico definitivo e instaurar el tratamiento adecuado. Se revisa el tema y dada su baja frecuencia y su propósito ominoso se presenta el caso clínico y su resolución