Ângulo de fase como potencial marcador do estado nutricional de pacientes em terapia intensiva

Abstract

Associate the phase angle with nutritional status, length of hospital stay and clinical outcome of critical patients in an intensive care unit. Methods: A longitudinal, prospective, quantitative study was conducted in a teaching hospital with 57 patients evaluated within 72 hours after admission to an intensive care unit. The phase angle was obtained by the electric impedance performed at the bedside, the global subjective and anthropometric evaluation was also performed, in which knee height and arm circumference were measured to estimate weight and height by means of predictive equations. Data were collected from the electronic medical record, such as age, length of hospital stay, discharge or death. Results: Of the 57 patients, 63.2% were male, with a mean age of 56 19.5 years. According to the global subjective evaluation, 59.6% were at nutritional risk. In 91.2% of the patients, the phase angle was below the recommended age angle according to the literature, being associated with nutritional risk, but no significant difference was found in the values between the well-nourished and nutritional risk group (p=0.601). It was also associated with length of hospitalization in an intensive care unit (p =0.023) and hospital (p=0.001), with significant difference between groups, however, there was no significant difference with death (p=0.468). Regarding nutritional status, there was a trend to death in the group with nutritional risk (p=0.054), but with no significant association with length of hospitalization. Conclusion: The phase angle was not associated with the nutritional status of these patients, and with mortality, however, it was associated with length of stay. There was a tendency to die during hospitalization in patients with nutritional risk, but without association with length of stay