Risk factors for acute kidney injury in patients hospitalized with COVID-19.

Introduction: Acute kidney injury (AKI) occurs frequently in COVID-19 patients and is associated with greater morbidity and mortality. Knowing the risks of AKI allows for identification, prevention, and timely treatment. This study aimed to identify the risk factors associated with AKI in hospitalized patients.

Hematological indices, mountain sickness and MRI brain abnormalities in professional and amateur mountain climbers after altitude exposure.

The purpose of this work was to correlate the presence of brain abnormalities on magnetic resonance imaging (MRI) with changes in hematological variables and the presence of mountain sickness in 21 mountain climbers involved in two different expeditions to high mountains, Everest and Aconcagua, without supplementary oxygen and recommended acclimatization for this kind of activities. The climbers underwent medical examination, hematological studies, electrocardiogram and MRI of the cerebrum. Wilcoxon signed-rank test was used to evaluate the changes in hematocrit, hemoglobin, red blood cells, iron and ferritin.