Assessment of regional ventilation distribution:Comparison of vibration response imaging with electrical impedance tomography
作者单位：Department of AnaesthesiologyMedical Centre of the Johannes Gutenberg-University Mainz National Beijing Center for Drug Safety Evaluation and ResearchBeijing Institute of Pharmacology and Toxicology
会议名称：《中国毒理学会第六届全国毒理学大会》
会议日期：2013年
学科分类：100405[医学-卫生毒理学] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 10[医学]
关 键 词：electrical impedance lung injury ventilation vibration imaging
摘 要：正OBJECTIVE Vibration response imaging（VRI） is a new bedside technology to monitor ventilation by detecting lung sound *** is currently unknown whether VRI is able to accurately monitor the local distribution of ventilation within the *** therefore compared VRI to electrical impedance tomography（EIT）,an established technique used for the assessment of regional ventilation. METHODS For peer review,simultaneous EIT and VRI measurements were performed in the healthy and injured lungs（ALI;induced by saline lavage） at different PEEP levels（0,5,10,15 mbar） in nine *** energy amplitude（VEA） by VRI,and amplitudes of relative impedance changes（rel. AZ） by EIT,were evaluated in seven regions of interest（ROIs）.To assess the distribution of VT by VRI and EIT,absolute values were normalized to the VT obtained by simultaneous spirometry measurements. RESULTS Redistribution of ventilation by ALI and PEEP was detected by VRI and *** linear correlation between pooled VT by VEA and *** was R =***-Altman analysis showed a bias of -1.07±24.71 ml and limits of agreement of -49.05 to +47.36 *** the different ROIs, correlations of VT - distribution by EIT and VRI ranged between R values ofO.29 and *** and PEEP did not alter the agreement of VT between VRI and *** Measurements of regional ventilation distribution by VRI are similar to those obtained by EIT.