Assessment of changes in body water by bioimpedance in acutely ill surgical patients.

Details

Serval ID
serval:BIB_8ABDA73A4C9B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Assessment of changes in body water by bioimpedance in acutely ill surgical patients.
Journal
Intensive Care Medicine
Author(s)
Chioléro R.L., Gay L.J., Cotting J., Gurtner C., Schutz Y.
ISSN
0342-4642 (Print)
ISSN-L
0342-4642
Publication state
Published
Issued date
1992
Volume
18
Number
6
Pages
322-326
Language
english
Abstract
OBJECTIVE: To evaluate the relationship between changes in body bioelectrical impedance (BI) at 0.5, 50 and kHz and the changes in body weight, as an index of total body water changes, in acutely ill surgical patients during the rapid infusion of isotonic saline solution.
DESIGN: Prospective clinical study.
SETTING: Multidisciplinary surgical ICU in a university hospital.
PATIENTS: Twelve male patients treated for acute surgical illness (multiple trauma n = 5, major surgery n = 7). Selection criteria: stable cardiovascular parameters, normal cardiac function, signs of hypovolemia (CVP < or = 5 mmHg, urine output < 1 ml/kg x h).
INTERVENTIONS: After baseline measurements, a 60 min fluid challenge test was performed with normal saline solution, 0.25 ml/kg/min [corrected].
MEASUREMENTS AND RESULTS: Body weight (platform digital scale), total body impedance (four-surface electrode technique; measurements at 0.5, 50 and 100 kHz) and urine output. Fluid retention induced a progressive decrease in BI at 0.5, 50 and 100 kHz, but the changes were significant for BI 0.5 and BI 100 only, from 40 min after the beginning of the fluid therapy onwards. There was a significant negative correlation between changes in water retention and BI 0.5, with individual correlation coefficients ranging from -0.72 to 0.95 (p < 0.01-0.0001). The slopes of the regression lines indicated that for each kg of water change, there was a mean decrease in BI of 18 ohm, but a substantial inter-individual variability was noted.
CONCLUSION: BI measured at low frequency can represent a valuable index of acute changes in body water in a group of surgical patients but not in a given individual.
Keywords
Acute Disease, Adolescent, Adult, Body Water/chemistry, Body Weight, Critical Illness, Electric Impedance, Hospitals, University, Humans, Infusions, Intravenous, Intensive Care Units, Male, Middle Aged, Postoperative Complications/diagnosis, Postoperative Complications/epidemiology, Prospective Studies, Sodium/blood, Sodium Chloride/administration & dosage, Sodium Chloride/diagnostic use, Switzerland/epidemiology, Water-Electrolyte Imbalance/diagnosis, Water-Electrolyte Imbalance/epidemiology, Weight Gain
Pubmed
Web of science
Create date
21/01/2008 14:09
Last modification date
20/08/2019 15:49
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