Search

A low-cost video laryngoscope (VDL) called Hybrid 1.0 was developed using smart devices for visualization. To test its performance, we compared it with a high-end VDL device, using both in vitro and in vivo studies. During the in vitro study, medical students without experience in airway intubation were randomly asked to intubate a mannequin with different degrees of difficulty (Cormack&ndash, Lehane scales) by using either the Hybrid 1.0 VDL (GI) or a conventional laryngoscope (GII). During the in vivo study, N = 60 endotracheal intubations were performed by resident and base physicians, divided into two groups, the first group intubated with the Hybrid 1.0 VDL (GI) while the second group used a VDL C-Mac shovel (GII). As performance indexes, both studies reported the number of successful intubations (correct capnography signal) and intubation time. For the in vitro testing, no statistically significant differences were found regarding the number of successful intubations, while statistically significant differences were found regarding the intubation times. During the in vivo tests, procedures were performed by residents and by base physicians, and no statistically significant differences were found. The provided results point out that the VDL proposed can be clinically useful and offers technical characteristics similar to other VDLs that currently exist on the market.

Measurement of intra-abdominal pressure (IAP) is realized with the Kron's method. However, this technique has drawbacks like an infusion of water into the bladder of the patient.The prove a new novel disposable sensor in the way to measure the IAP (DSIAP) this one addresses some limitations of the Kron method.The DSIAP was tested in vitro and clinical settings. The proposed technique was compared with Kron's method through Pearson correlation and Bland-Altman analysis. For in vitro tests, 159 measurements were taken performed by simulating the IAP in the bladder. For the clinical test, 20 pairs of measurements were made in patients with routine IAP monitoring in the intensive care unit.In vitro measurements showed a strong correlation between the DSIAP and the reference (r = 0.99, p-value2.2 × 10The results suggest that the proposed DSIAP showed a profile similar to pressure transducers already in clinical use while overcoming some limitations of the former.La medición de la presión intraabdominal (PIA) generalmente se realiza con el método de Kron, a pesar de presentar inconvenientes como la infusión de agua en la vejiga del paciente.Introducir un nuevo sensor desechable para medir la PIA (SDPIA) que aborda algunas limitaciones del método de Kron.Se probó el SDPIA en pruebas in vitro y clínicas. La técnica se contrastó con el método de Kron empleando la correlación de Pearson y el análisis de Bland-Altman. Para las pruebas in vitro se realizaron 159 mediciones simulando la PIA en la vejiga. Para las pruebas clínicas se realizaron 20 mediciones en pacientes con monitorización rutinaria de la PIA en la unidad de cuidados intensivos.En las mediciones in vitro se encontró una alta correlación (r = 0.99; p2.2 × 10Los resultados sugieren que el SDPIA propuesto muestra un desempeño similar al de los transductores de presión actualmente en uso clínico, mientras sobrelleva algunas limitaciones de estos últimos.

ResumenEn este artículo se realiza la instrumentación de un impulsor para una lámpara de LED. Se busca controlar la intensidad luminosa de la lámpara LED a través de la técnica PWM, con circuitos RC y Mosfet. Se realiza la instrumentación de la propuesta eléctrica a través del empleo del concepto de reactancia capacitiva para limitar la corriente de entrada proveniente de la línea de CA.AbstractThis article describes the implementation of an LED lamp driver. It seeks to control the brightness of the LED lamp through PWM technique, RC and MOSFET circuits. An electrical instrumentation proposal is made by using the concept of capacitive reactance to limit the input current mains AC.