Validation of three-dimensional thoracic electrical impedance tomography of horses during normal and increased tidal volumes.

IF 2.3 4区 医学 Q3 BIOPHYSICS Physiological measurement Pub Date : 2024-03-21 DOI:10.1088/1361-6579/ad2eb3
David P Byrne, Nicole Studer, Cristy Secombe, Alexander Cieslewicz, Giselle Hosgood, Anthea Raisis, Andy Adler, Martina Mosing
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Abstract

Objective. Data from two-plane electrical impedance tomography (EIT) can be reconstructed into various slices of functional lung images, allowing for more complete visualisation and assessment of lung physiology in health and disease. The aim of this study was to confirm the ability of 3D EIT to visualise normal lung anatomy and physiology at rest and during increased ventilation (represented by rebreathing).Approach. Two-plane EIT data, using two electrode planes 20 cm apart, were collected in 20 standing sedate horses at baseline (resting) conditions, and during rebreathing. EIT data were reconstructed into 3D EIT whereby tidal impedance variation (TIV), ventilated area, and right-left and ventral-dorsal centres of ventilation (CoVRLand CoVVD, respectively) were calculated in cranial, middle and caudal slices of lung, from data collected using the two planes of electrodes.Main results. There was a significant interaction of time and slice for TIV (p< 0.0001) with TIV increasing during rebreathing in both caudal and middle slices. The ratio of right to left ventilated area was higher in the cranial slice, in comparison to the caudal slice (p= 0.0002). There were significant effects of time and slice on CoVVDwhereby the cranial slice was more ventrally distributed than the caudal slice (p< 0.0009 for the interaction).Significance. The distribution of ventilation in the three slices corresponds with topographical anatomy of the equine lung. This study confirms that 3D EIT can accurately represent lung anatomy and changes in ventilation distribution during rebreathing in standing sedate horses.

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验证正常潮气量和增加潮气量时马的三维胸腔电阻抗断层扫描。
目的:双平面电阻抗断层扫描(EIT)的数据可重建为各种肺功能图像切片,从而更全面地观察和评估健康和疾病时的肺部生理状况。这项研究的目的是确认三维电阻抗断层成像技术在静息状态和通气量增加(以再呼吸为代表)时观察正常肺部解剖和生理结构的能力:使用相距 20 厘米的两个电极平面,收集 20 匹站立镇静的马在基线(静息)状态和再呼吸时的双平面 EIT 数据。将 EIT 数据重建为三维 EIT,根据使用两个电极平面采集的数据,计算出肺部头颅、中部和尾部切片的潮气阻抗变化(TIV)、通气面积以及左右和腹背通气中心(分别为 CoVRL 和 CoVVD):时间和切片对 TIV 有明显的交互作用(p < 0.0001),尾部和中部切片的 TIV 在再吸气时增加。头颅切片与尾部切片相比,左右通气面积之比更高(p = 0.0002)。时间和切片对 CoVVD 有显着影响,其中颅骨切片比尾部切片更偏向腹侧分布(交互作用 p < 0.0009):三个切片的通气分布与马肺的地形解剖相符。这项研究证实,3d EIT 可以准确地反映站立镇静马匹的肺部解剖结构和再呼吸时通气分布的变化。
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来源期刊
Physiological measurement
Physiological measurement 生物-工程:生物医学
CiteScore
5.50
自引率
9.40%
发文量
124
审稿时长
3 months
期刊介绍: Physiological Measurement publishes papers about the quantitative assessment and visualization of physiological function in clinical research and practice, with an emphasis on the development of new methods of measurement and their validation. Papers are published on topics including: applied physiology in illness and health electrical bioimpedance, optical and acoustic measurement techniques advanced methods of time series and other data analysis biomedical and clinical engineering in-patient and ambulatory monitoring point-of-care technologies novel clinical measurements of cardiovascular, neurological, and musculoskeletal systems. measurements in molecular, cellular and organ physiology and electrophysiology physiological modeling and simulation novel biomedical sensors, instruments, devices and systems measurement standards and guidelines.
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