ISSN:
1432-1238
Keywords:
Transthoracic electrical impedance
;
Acute respiratory failure
;
Pulmonary interstitial edema
;
Intrathoracic fluid volume
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract The alteration (ΔZ 0 ) of transthoracic electrical impedance (TEI) during extracorporeal hemodialysis (EHD) was investigated in two Groups of patients with acute renal and acute respiratory failure, that differed with respect to the severity of respiratory insufficiency. Group I had moderate respiratory failure (Fi O 2 0.31±0.10, Pa 0 2 84±14 mmHg), and Group II had severe respiratory failure (Fi 0 2 0.75±0.17, Pa O O 77±14 mmHg). There was a significant correlation between increase in TEI (ΔZ0) and decrease in body weight (ΔBW) in each individual patient, but the slope of regression lines was remarkably flattened in Group II. In Group I, ΔTEI was 1.9±0.9 Ω, the calculated TEI for 500 gr decrease in BW (ΔZ0–500 gr) was 0.59±0.21 Ω, and a significant correlation existed between pooled data of ΔZ0 and ΔBW. In Group II TEI increased less significantly, ΔTEI was 0.6±0.3 Ω (P〈0.001), ΔZ0–500 gr was 0.26±0.27 Ω (P〈0.01), and there was no correlation between pooled data of ΔZ0 and ΔBW. Increase of TEI in Group II could be completely attributed to increase in hematocrit. It is concluded that patients of Group I with acute renal failure and moderate respiratory failure lost intrathoracic fluid during EHD, whereas patients of Group II with severe respiratory failure did not. TEI during EHD may serve as a test for detection of fixed fluid within the pulmonary interstitium indicating a poor prognosis of the acute respiratory failure.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01757296
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