Examinando por Materia "PRESION ARTERIAL"

Mostrando1 - 3 de 3
  • Proyecto final de Grado
    Estimación de la presión arterial no invasiva con calidad médica a partir de PPG mediante redes neuronales artificiales
    (2021-10) Ananía, Pilar; Torlaschi, Megan Ann; Tu, Alex; Szlain, Darío; Ramele, Rodrigo
    "La alta mortalidad asociada a las enfermedades cardiovasculares, en particular a la hipertensión, es la razón por la que resulta relevante la búsqueda de métodos que permitan un registro continuo de la presión arterial de forma simple y realizable en un entorno doméstico. El presente proyecto hace foco en la utilización de curvas fotopletismográficas como método de estimación de la presión arterial no invasiva, utilizando redes neuronales artificiales."
  • Póster
    Medidor de presión arterial no invasivo
    (2018) Flugelman, Máximo; Kabas, Fernando; Puig Insua, Micaela; Alanis, Manuela
    "Mostrar el proceso de diseño e ingeniería involucrado en el desarrollo de un producto médico con foco en la construcción de un medidor de presión arterial no invasivo automático basado en el método oscilométrico."
  • Artículo de Publicación Periódica
    Photoplethysmographic characterization of vascular tone mediated changes in arterial pressure: an observational study
    (2019-10) Tusman, Gerardo; Acosta, Cecilia M.; Pulletz, Sven; Böhm, Stephan H.; Scandurra, Adriana; Martínez Arca, Jorge; Madorno, Matías; Suárez-Sipmann, Fernando
    "To determine whether a classification based on the contour of the photoplethysmography signal (PPGc) can detect changes in systolic arterial blood pressure (SAP) and vascular tone. Episodes of normotension (SAP 90–140 mmHg), hypertension (SAP > 140 mmHg) and hypotension (SAP < 90 mmHg) were analyzed in 15 cardiac surgery patients. SAP and two surrogates of the vascular tone, systemic vascular resistance (SVR) and vascular compliance (Cvasc = stroke volume/pulse pressure) were compared with PPGc. Changes in PPG amplitude (foot-to-peak distance) and dicrotic notch position were used to define 6 classes taking class III as a normal vascular tone with a notch placed between 20 and 50% of the PPG amplitude. Class I-to-II represented vasoconstriction with notch placed > 50% in a small PPG, while class IV-to-VI described vasodilation with a notch placed < 20% in a tall PPG wave. 190 datasets were analyzed including 61 episodes of hypertension [SAP = 159 (151–170) mmHg (median 1st–3rd quartiles)], 84 of normotension, SAP = 124 (113–131) mmHg and 45 of hypotension SAP = 85(80–87) mmHg. SAP were well correlated with SVR (r = 0.78, p < 0.0001) and Cvasc (r = 0.84, p < 0.0001). The PPG-based classification correlated well with SAP (r = − 0.90, p < 0.0001), SVR (r = − 0.72, p < 0.0001) and Cvasc (r = 0.82, p < 0.0001). The PPGc misclassified 7 out of the 190 episodes, presenting good accuracy (98.4% and 97.8%), sensitivity (100% and 94.9%) and specificity (97.9% and 99.2%) for detecting episodes of hypotension and hypertension, respectively. Changes in arterial pressure and vascular tone were closely related to the proposed classification based on PPG waveform."