DETECTION OF CHANGES IN INTRATHORACIC FLUID IN MAN USING ELECTRICAL-IMPEDANCE TOMOGRAPHY

被引:18
作者
CAMPBELL, JH
HARRIS, ND
ZHANG, F
MORICE, AH
BROWN, BH
机构
[1] ROYAL HALLAMSHIRE HOSP,RESP MED SECT,SHEFFIELD S10 2RX,S YORKSHIRE,ENGLAND
[2] ROYAL HALLAMSHIRE HOSP,DEPT MED PHYS & CLIN ENGN,SHEFFIELD S10 2RX,S YORKSHIRE,ENGLAND
关键词
ELECTRICAL IMPEDANCE; PULMONARY BLOOD VOLUME; TOMOGRAPHY;
D O I
10.1042/cs0870097
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
1. The Sheffield electrical impedance tomography system produces information on changes in the distribution of resistivity within tissue. We report on the assessment of electrical impedance tomography in monitoring changes in lung resistivity during a fluid challenge in normal man. 2. Eight normal subjects were studied. Electrical impedance tomography recordings were made at three different lung volumes before, during and after the intravenous infusion of 1 litre of 0.9% NaCl (saline). 3. The mean fall in lung resistivity during the infusion was -22% at total lung capacity (range -10% to -28%), -24% at tidal breathing (-15% to -37%) and -11% at residual volume (-5% to -19%) (P<0.05 mean pre-infusion resistivity compared with the nadir value after infusion, Wilcoxon). 4. These changes in lung resistivity were probably due to a combination of a fall in haematocrit and an expansion of pulmonary blood volume.
引用
收藏
页码:97 / 101
页数:5
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