Análise comparativa dos modos ventilatórios vcv, pcv, e prvc sobre parâmetros ventilatórios, tempo de ventilação mecânica e tempo de internação em uti em pacientes neurológicos

Abstract

Objectives: To compare the outcome of ventilatory modes VCV, PCV and PRVC in relation to ventilatory mechanics, duration of mechanical ventilation, length of hospital stay in an intensive care unit (ICU) and survival in neurological patients. Methods: Randomized cohort study comparing three ventilatory modalities VCV, PCV and PRVC in neurological patients diagnosed with stroke ischemic or hemorrhagic and traumatic brain injury, mechanically ventilated and admitted to the ICU. The mechanical fan was adjusted according to the chosen mode and with ventilatory parameters adjusted to maintain a tidal volume of 6 to 8 ml / kg and gasometric parameters within the normal range. Demographic data were collected, hemodynamic, gasometric and ventilatory parameters and the APACHE II scales, RASS and Glasgow. At the end of the protocol, the data of mortality / survival, length of stay in the ICU and discharge from the unit. Results: No there was a difference between the groups regarding the clinical, gasometric and ventilatory effects. The PVC group had a longer duration of ventilation controlled assistance in relation to the VCV and PRVC groups (p = 0.04). There was no differenc between groups in the time of mechanical ventilation (p = 0.14), admission to the ICU (p = 0.27) and survival (p = 0.77). Conclusion: There is no superiority between the VCV, PCV and PRVC in relation to ventilatory and gasometric mechanics, time of mechanical ventilation, length of hospital stay and mortality in neurological patients.