Abstract
OBJECTIVE: To assess the impact of invasive mechanical ventilation on renal function and to verify the predisposing factors for the development of acute kidney injury in relation to the use of invasive mechanical ventilation in intensive care. METHOD: An observational, retrospective, quantitative cohort study. The sample was non-probabilistic, of convenience, and consisted of 51 patients. Patient severity was assessed using the Simplified Acute Physiology Score and Sequential Organ Failure Assessment. All tests were two-tailed, and p < 0.05 was considered statistically significant. RESULTS: Among patients with kidney injury on invasive mechanical ventilation, 41.2% presented with severe kidney injury (stage 3 of the Kidney Disease Initiative Global Outcomes). The duration of mechanical ventilation was longer in patients with acute kidney injury compared to those without renal impairment (19 versus four days). CONCLUSION: The impact of mechanical ventilation in critically ill patients was evidenced by the higher prevalence of severe acute kidney injury. Invasive ventilatory support was more prevalent among older adults, highlighting the severity of the patients based on the Simplified Acute Physiology Score and Sequential Organ Failure Assessment scores, and consequently a higher risk of death.