当前位置： SCI文献检索 > MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING期刊下所有文献 > CT analysis of the use of the electrical impedance technique to estimate local oedema in the extremities in patients with lymphatic obstruction.

CT analysis of the use of the electrical impedance technique to estimate local oedema in the extremities in patients with lymphatic obstruction.

Abstract：

:The aim of the study is to establish the validity of the use of the electrical impedance technique for estimating local oedema in extremities through comparison with computed-tomography (CT) analysis. Eight healthy women (group 1) and nine women with unilateral leg oedema following chronic lymphatic obstruction (group 2) are examined sequentially utilising both methods. 'Equivalent resistivities' of extra- and intracellular fluid (RE and RI) are measured in the leg's upper portion with a multi-frequency impedance meter, and seven CT slices are taken in the same leg segments. In each slice, the ratios of interstitial fluid to subcutaneous tissue and to muscle are calculated using the CT number of plasma for interstitial fluid, and CT numbers of subcutaneous tissue and muscle of group 1 for 'normal' tissues. A decrease in RE and an increase in RI/RE, indicating extracellular fluid increase, are observed in oedematous legs in group 2 when compared with the left legs in group 1. Correspondingly, an increase in the ratios of interstitial fluid to subcutaneous tissue area and to total cross-sectional area is observed in the oedematous legs when compared with those of normal legs in CT analysis. Thus the multi-frequency impedance technique is effective in detecting local oedema in extremities.

journal_name

Med Biol Eng Comput

journal_title

Medical & biological engineering & computing

authors

Watanabe R,Kotoura H,Morishita Y

doi

10.1007/BF02522859

subject

Has Abstract

pub_date

1998-01-01 00:00:00

pages

60-5

issue

1

eissn

0140-0118

issn

1741-0444

journal_volume

36

pub_type

杂志文章

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