생체전기임피던스 측정법을 이용한 외과 중환자의 체성분 변화 양상

Abstract

Purpose: Assessment of sequential changes in body composition during the metabolic response in critically ill surgical patients is essential for optimal nutritional support and management. Bioelectrical impedance analysis (BIA) is an easy, portable, and quick way to assess body composition. Thus, the aim of this study was to evaluate the sequential changes in body composition and the validity of Direct segmental Multi-frequency BIA in critically ill surgical patients. Materials and Methods: Twenty-three patients admitted to the intensive care unit (ICU) after major surgery were measured for body composition by multiple-frequency BIA after intensive care unit admission as well as 3 and 7 days later. Repeated-measures analysis of variance (ANOVA) was used to detect significant changes over time. Results: The average length of intensive care unit stay was 4.3 days. Total body water, extracellular water, skeletal muscle mass (SMM), soft lean mass, and fat-free mass (FFM) increased during the first 72 h of intensive care unit admission, after which they decreased slightly. On the other hand, fat mass decreased during the first 72 h of intensive care and then increased. However, arm circumference (AC), arm muscle circumference (AMC), and waist circumference (WC) gradually decreased by day 7 (P＜0.001). Conclusion: In this study, AC, AMC, WC, and direct segmental Multi-frequency BIA were less affected by initial resuscitation in the intensive care unit (ICU). Therefore, segmental BIA may be useful for critical ill patients in altered hydration states.