Total body water estimations in healthy men and women using bioimpedance spectroscopy: a deuterium oxide comparison

Abstract

Background: Total body water (TBW) estimations have been used to estimate body composition, particularly fat-free mass, to aid in nutritional interventions, and to monitor hydration status. In the past, bioimpedance spectroscopy (BIS) devices have been used to estimate TBW. Previous investigations have examined the validity of the XiTRON 4000B (XiTRON Technologies) BIS device for estimating TBW. Recently, a new BIS device (Imp™ SFB7) has become available, claiming greater precision when estimating TBW. The Imp™ SFB7 (SFB7) is based on similar BIS principles, while offering increased portability and a greater range of frequencies when compared to older devices, such as the XiTRON 4000B (4000B). The purpose of this study was to examine the validity of the SFB7 for estimating total body water in healthy college-age men and women compared to the 4000B and deuterium oxide (D 2 O).

Measurement of Acute Edema Shifts in Human Burn Survivors—The Reliability and Sensitivity of Bioimpedence Spectroscopy as an Objective Clinical Measure

“…Finally, despite only seconds between trials, the relative insensitivity of ICF compared with ECF results may be explained by the measurement of intracellular fluids involving rapidly changing, nonstatic volumes such as those within the vascular, gastrointestinal and lymphatic transport systems. This compares favorably with other studies of noninjured participants where the SE of the estimate for SFB7 BIS was ϳ2 L. 22 However, a reduction in sensitivity (MDD) of BIS is evident in the presence of dressings ( Table 1). The dressing protocol in the first 2 to 3 days after burn at the RPH includes nanocrystalline silver/moist gauze/ bandage dressings.…”

Exercise adherence and intervention effects of two school-based resistance training programs for adolescents

“…(iii) Waist circumference: Nonextensible steel tapes (KDSW-2008) were used to assess waist circumference, which was measured level with the umbilicus to standardize the procedure. (iv) Body composition: Percentage body fat, fat mass (FM) and fat-free mass (FFM) were determined using the Imp™ SFB7 bioelectrical impedance (BIA) analyzer (Moon et al, 2008, Scharfetter et al, 2005. The Imp™ SFB7 is a multifrequency, tetra-polar bioelectrical impedance spectroscopy (BIS) device (Nielsen et al, 2007).…”

Estimating body fat in NCAA Division I female athletes: a five-compartment model validation of laboratory methods

“…This technique, explained elsewhere (Matthie et al 1998), uses a range of frequencies, encompassing both low and high ranges that allow electrical current to pass around and through each cell, and has produced valid estimates of TBW when compared to a criterion method, such as deuterium oxide (Matthie et al 1998;Moon et al 2008;Van Loan et al 1993). Results from our laboratory have also shown that the BIS device used in the current investigation is a valid measurement tool for determining TBW in healthy females when compared to deuterium oxide (Moon et al 2008). Furthermore, BIS has been used to assess TBW for multi-compartment equations in previous validation studies (Minderico et al 2007;Moon et al 2007;Sardinha et al 2003).…”