Background: The assessment of intravascular volume and fluid responsiveness is challenging in the management of critically ill patients. Diagnostic methods of hemodynamic monitoring must be safe, reproducible, and practical. Objective: To describe the applicability of ultrasound indices of the inferior vena cava in the assessment of intravascular volume and prediction of fluid responsiveness in critically ill patients. Method: A systematic review performed of the PubMed®, Latin American and Caribbean Health Sciences Literature, and Scientific Electronic Library Online databases for articles published in the previous five years. The descriptors used were “inferior vena cava,” “ultrasonography,” “fluid responsiveness,” and “volume status.” Results: The search identified 13 relevant articles. The collapsibility index of the inferior vena cava was 25%–50% as the cutoff point for defining hypovolemia and showed applicability in predicting fluid responsiveness in patients breathing spontaneously with cutoff points of 25%–57%. In mechanical ventilation scenarios, the distensibility index of the inferior vena cava was more effective at predicting fluid responsiveness than the other measurements with variation of 10.2%–20.5%. The inferior vena cava/aorta diameter index was especially useful in the pediatric population for defining intravascular volume; however, in adults, there were many divergences in its applicability. Conclusion: The assessment of intravascular volume and fluid responsiveness through ultrasound indices of the inferior vena cava is applicable and safe for diagnosing and monitoring hemodynamic instability. However, studies of value standardization are necessary due to divergences in the cutoff points used in each index.
RESUMO Objetivo Analisar as características socioeconômicas e o perfil de saúde auditiva de trabalhadores rurais do semiárido nordestino. Métodos Trata-se de um estudo quantitativo transversal descritivo, realizado com 88 indivíduos de ambos os gêneros, que executavam atividades em meio rural há, pelo menos, um ano. A primeira etapa do estudo correspondeu à aplicação de questionários a respeito do perfil socioeconômico e de saúde; a segunda etapa consistiu na avaliação audiológica dos trabalhadores rurais. Resultados Observou-se diferença significativa entre os indivíduos com resultado normal e perda auditiva na audiometria, de acordo com o gênero, faixa etária, jornada de trabalho e dificuldade auditiva. Além disso, verificou-se correlação positiva entre os valores das audiometrias e a idade dos pacientes, em todas as frequências analisadas, principalmente nas mais agudas. Conclusão As características inerentes ao trabalho no campo podem afetar negativamente a saúde auditiva. É importante conhecer a realidade da população rural, na perspectiva de garantir não só o diagnóstico situacional, mas também medidas de promoção, proteção e prevenção referentes à saúde auditiva desses trabalhadores.
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