Bioingeniería
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Browsing Bioingeniería by Author "Argüello Prada, Erick Javier"
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Item Elaboración de un protocolo para calibración de equipos de pesaje no automático y esfigmomanómetros bajo los lineamientos de la norma NTC/ISO-IEC 17025:2017(Universidad Santiago de Cali, 2019) Riascos Cuéllar, Leyder David; Argüello Prada, Erick JavierThe calibration of biomedical equipment classified as measuring instruments must be currently performed by accredited laboratories, as specified in Decree 1595 of 2015 that regulates legal metrology in Colombia. The goal is to ensure that the optimal operation of the technology and that the patient's safety is not compromised. Based on this, the present investigation aims to develop a protocol for calibration of biomedical equipment, specifically non-automatic weighing instruments as well as mechanical and automatic sphygmomanometers under the guidelines of the Colombian technical standard NTC / ISO-IEC 17025 General Requirements for the competence of the 2017 testing and calibration laboratories. To achieve this objective, it was necessary to review the literature guides SIM MWG7 / cg-01 / v.00 of 2009, OIML R16-1 and R16-2, which are the basis for the elaboration of the proposed protocol. In addition, the advisor of the National Accreditation Agency of Colombia provided training sessions - ONAC hired by the institution in the process of accreditation, where all the analyses were performed. These trainings focused on strengthening the competence of the personnel involved, such as basic statistics, measurement uncertainty, mass internship, pressure internship; which allowed them to acquire the theoretical and related technical bases in the elaboration of a protocol that can be adopted by any calibration laboratory.Item Utilización de parámetros derivados de la señal fotopletismográfica (ppg) para la valoración de dolor inducido experimentalmente en sujetos sanos: estudio de factibilidad(Universidad Santiago de Cali, 2020) Ramírez Mena, Andrés David; Argüello Prada, Erick JavierGiven the need to assess pain experienced by patients in an adequate and objective way, several efforts have been made to determine whether it is possible to assess the pain suffered by an individual through physiological indicators. However, most of these efforts have focused on evaluating the response of subjects to thermal or, even, electrical stimuli, and very little evidence exists on the feasibility of detecting and/or quantifying the intensity of pain experimentally induced by mechanical stimuli. In addition, the use of multiple parameters can bring complications during implementation, electrical risk and discomfort for the subject. Based on this, the objective of this study was to assess whether it is possible, through certain parameters derived from the photoplethysmographic signal (PPG), to detect the presence or absence of pain caused by mechanical stimuli. The three parameters used were heart rate, PPG signal amplitude (PPGA), and the high-frequency component of heart rate variability. Fifteen healthy subjects (11 men and 4 women; between 18 and 45 years old) voluntarily participated in the study, after signing an informed consent. A mechanical stimulus was applied at three different intensities: 3, 6 and 9 N, for approximately 3 seconds, and the variations of the chosen parameters were captured through an acquisition circuit and a processing algorithm programmed in the MATLAB environment. The results obtained suggest that, even though the three parameters were able to distinguish pain from no pain, only the heart rate was able to differentiate between low and medium pain levels, as well as low and high pain levels. However, it was shown that, regardless of tensity, a mechanical stimulus capable of inducing pain could significantly influence the parameters analyzed. Future work could include a larger number of participants and randomize the application of the stimulus.