Results: 51

Is the early or delayed remote ischemic preconditioning the more effective from a microcirculatory and histological point of view in a rat model of partial liver ischemia-reperfusion?

Acta cir. bras; 33 (7), 2018
Abstract Purpose: To compare early- and late-effect remote ischemic preconditioning (RIPC) by analysing the microcirculatory, hemodynamic and histological changes in partial liver ischemia-reperfusion of rats. Methods: 60-minute partial liver ischemia followed by 120-minute reperfusion was performed ...

Uso do índice de perfusão para avaliar reatividade microvascular no choque séptico após ressuscitação volêmica

RESUMO Objetivo: Os distúrbios microcirculatórios estão implicados no prognóstico do choque séptico. A hiporresponsividade microvascular pode ser avaliada por meio do índice de perfusão, derivado da oximetria de pulso e hiperemia reativa. Com utilização do índice de perfusão, investigamos a h...

Repeatability of the "flash-replenishment" method in contrast-enhanced ultrasound for the quantitative assessment of hepatic microvascular perfusion

Braz. j. med. biol. res; 51 (4), 2018
This study aimed to evaluate the feasibility and repeatability of the flash-replenishment method in contrast-enhanced ultrasound (CEUS) perfusion imaging and assess quantitatively microvascular perfusion in the liver. Twenty healthy New Zealand rabbits were submitted to CEUS perfusion imaging with contin...

Microcirculation improvement after short-term infusion of vasopressin in septic shock is dependent on noradrenaline

Clinics; 72 (12), 2017
OBJECTIVES: To assess the impact of vasopressin on the microcirculation and to develop a predictive model to estimate the probability of microcirculatory recruitment in patients with septic shock. METHODS: This prospective interventional study included patients with septic shock receiving noradrenaline ...

Association of Inflammation and Endothelial Dysfunction with Coronary Microvascular Resistance in Patients with Cardiac Syndrome X

Arq. bras. cardiol; 109 (5), 2017
Abstract Background: Although a proportion of CSX patients have impaired brachial artery flow-mediated dilatation (FMD) in response to hyperemia, suggesting that endothelial dysfunction in these patients may be systemic and not just confined to the coronary circulation; the underlying mechanisms trigger...

Recentes avanços na avaliação da microcirculação à beira do leito em pacientes graves

RESUMO Parâmetros relacionados à macrocirculação, como pressão arterial média, pressão venosa central, débito cardíaco e saturação venosa mista e central de oxigênio, são comumente utilizados na avaliação hemodinâmica de pacientes graves. No entanto, diversos estudos demonstram que existe...

Effects of the positive end-expiratory pressure increase on sublingual microcirculation in patients with acute respiratory distress syndrome

Rev. bras. anestesiol; 67 (3), 2017
Abstract Objective: The aim of this study was to evaluate the impact of increased positive end-expiratory pressure on the sublingual microcirculation. Methods: Adult patients who were sedated, under mechanical ventilation, and had a diagnosis of circulatory shock and acute respiratory distress syndrome...

The effects of passive tobacco smoking on the microcirculation of the abdominal wall in rats

Acta cir. bras; 31 (11), 2016
ABSTRACT PURPOSE: To analysis the effects of passive smoking on the microstructure of tissues of the abdominal wall regarding microcirculation, using histopathological study of the tobacco exposed rats. METHODS: Twenty four male Wistar rats were divided in Control Group (CG = 8 animals) and Exposition...

Evaluación de la microcirculación con sidestream dark field (SDF) Microscan® como método de monitorización en microcirugía en modelo porcino

Rev. chil. cir; 68 (5), 2016
Objetivo: Determinar la factibilidad de la monitorización en microcirugía por medio de la evaluación no invasiva de la microcirculación con sidestream dark field (SDF) y compararla con otros métodos. Materiales y métodos: Estudio experimental. En 8 cerdos se elevó colgajo pectoral y se disecó ped...

Medición de la microcirculación retiniana luego del tratamiento antihipertensivo

Background and objective: With the development of image processing techniques, it has become possible to measure the changes in retinal vessels of hypertensive patients by means of eye fundus photographs. Patients and method: In this paper we aim to classify retinal vessels automatically into arterioles ...