Electrical impedance measured changes in thoracic fluid content during thoracentesis
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Electrical impedance measured changes in thoracic fluid content during thoracentesis. / Petersen, J R; Jensen, B V; Drabaek, H; Viskum, K; Mehlsen, J.
In: Clinical Physiology and Functional Imaging, Vol. 14, No. 4, 01.07.1994, p. 459-66.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Electrical impedance measured changes in thoracic fluid content during thoracentesis
AU - Petersen, J R
AU - Jensen, B V
AU - Drabaek, H
AU - Viskum, K
AU - Mehlsen, J
PY - 1994/7/1
Y1 - 1994/7/1
N2 - In patients (seven females and 11 males) with pleural effusion due to pulmonary (n = 13) or cardiac disease (n = 5) the change in baseline transthoracic impedance (Z0) was measured by electrical impedance (BoMed's NCCOM-3, 70 kHz) during thoracentesis. Data were obtained before and after withdrawal of each 500 ml, and at the end of the thoracentesis. We found a close linear correlation (r = 0.97) between changes in Z0 and the volume of aspirated pleural effusion (y = 0.415.x+0.093). The variability of the estimated thoracic fluid volumes was analysed with a plot of the residuals from the regression line, and we found that changes in thoracic fluid volume estimated by impedance technique would be within +/- 302 ml (= 2 SD). However, the absolute value of Z0 before thoracentesis could not differentiate the group of patients with pleural effusion from normal subjects (n = 28).
AB - In patients (seven females and 11 males) with pleural effusion due to pulmonary (n = 13) or cardiac disease (n = 5) the change in baseline transthoracic impedance (Z0) was measured by electrical impedance (BoMed's NCCOM-3, 70 kHz) during thoracentesis. Data were obtained before and after withdrawal of each 500 ml, and at the end of the thoracentesis. We found a close linear correlation (r = 0.97) between changes in Z0 and the volume of aspirated pleural effusion (y = 0.415.x+0.093). The variability of the estimated thoracic fluid volumes was analysed with a plot of the residuals from the regression line, and we found that changes in thoracic fluid volume estimated by impedance technique would be within +/- 302 ml (= 2 SD). However, the absolute value of Z0 before thoracentesis could not differentiate the group of patients with pleural effusion from normal subjects (n = 28).
M3 - Journal article
VL - 14
SP - 459
EP - 466
JO - Clinical Physiology and Functional Imaging
JF - Clinical Physiology and Functional Imaging
SN - 1475-0961
IS - 4
ER -
ID: 34073747