Examinando por Materia "Teléfono inteligente"

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Acceso abierto
Development and validation of a test for the measurement of methhemoglobin through the analysis of images with a smartphone - 2023
(Universidad Privada Norbert Wiener, 2024-07-20) Leon Trujillo, Bryan Estiff; Saldaña Orejón, Italo Moisés
Objective: To develop and validate a test for measuring methemoglobin using image analysis with a smartphone. Materials and Methods: The design of this research is descriptive cross-sectional, correlational, quantitative, and prospective. It will consist of a set of arterial blood samples collected in lithium heparin tubes at the Carlos Lanfranco La Hoz Hospital in the biochemistry area from September 2023 to January 2024. Results: A linear relationship was found between sodium nitrite concentration and methemoglobin concentration obtained in the ABL-800 Flex gasometer, with an R² value of 0.9971. The values of the red channel showed an inversely proportional relationship with methemoglobin concentration. Image analysis was performed using the regression equation Y = -1.0036x + 132.44. According to the research, methemoglobin determination with a smartphone showed minimal bias compared to hemoglobin levels and methylene blue concentration. Conclusions: A simple and cost-effective method was developed for determining methemoglobinemia through measurement of the red channel values of RGB using a smartphone camera, with minimal interference from hemoglobin levels and methylene blue. This will be very useful in health centers with limited resources or in situations where methemoglobin concentrations cannot be measured rapidly.
Acceso abierto
Enterobacteria most commonly found on smart phone (TI) of the staff of a clinic in San Juan de Miraflores Peru period september, 2022
(Universidad Privada Norbert Wiener, 2023-11-26) Castro Ccoscco, Maria Luisa; Cabello Vílchez, Alfonso Martin
Smartphones are devices with continuous handling, showing a high percentage of contamination on the surfaces of these devices, reflecting a public health problem. They are capable of adhering to and surviving on inert surfaces, transferring pathogens to patients via hands. The objective of the study was to describe the species of Enterobacteria most commonly found on smartphones (SS) of the staff of a clinic. It was observational, descriptive, cross-sectional, and prospective. The representative samples were 36 touchscreen smartphones along with informed consent and selection criteria. For the bacteriological analysis, the Stuart transport medium was used, which preserves the sample until reaching the laboratory. Swabs were taken from the edges and back of the smartphones, followed by microbiological culture to describe bacterial growth on culture media and identify the species using biochemical tests, concluding with the antibiogram. Results were presented in tables using Microsoft Excel. Enterobacteria were found, with Escherichia coli and Klebsiella pneumoniae being the predominant species.