Monitoring of Regional Lung Ventilation by Chest Electrical Impedance in the Course of Extermination

2019 ◽  
Author(s):  
Keyword(s):  
Electrical Impedance ◽  
Lung Ventilation ◽  
Regional Lung ◽  
Regional Lung Ventilation

scholarly journals Assessment of regional lung ventilation by electrical impedance tomography in a patient with unilateral bronchial stenosis and a history of tuberculosis

2013 ◽  
Vol 39 (6) ◽  
pp. 742-746 ◽  
Author(s):  
Liégina Silveira Marinho ◽  
Nathalia Parente de Sousa ◽  
Carlos Augusto Barbosa da Silveira Barros ◽  
Marcelo Silveira Matias ◽  
Luana Torres Monteiro ◽  
...  
Keyword(s):  
Radionuclide Imaging ◽  
Electrical Impedance ◽  
Imaging Technique ◽  
Lung Ventilation ◽  
Bronchial Stenosis ◽  
Impedance Tomography ◽  
Postural Changes ◽  
Regional Lung ◽  
History Of ◽  
Regional Lung Ventilation

Bronchial stenosis can impair regional lung ventilation by causing abnormal, asymmetric airflow limitation. Electrical impedance tomography (EIT) is an imaging technique that allows the assessment of regional lung ventilation and therefore complements the functional assessment of the lungs. We report the case of a patient with left unilateral bronchial stenosis and a history of tuberculosis, in whom regional lung ventilation was assessed by EIT. The EIT results were compared with those obtained by ventilation/perfusion radionuclide imaging. The patient was using nasal continuous positive airway pressure (CPAP) for the treatment of obstructive sleep apnea syndrome. Therefore, we studied the effects of postural changes and of the use of nasal CPAP. The EIT revealed heterogeneous distribution of regional lung ventilation, the ventilation being higher in the right lung, and this distribution was influenced by postural changes and CPAP use. The EIT assessment of regional lung ventilation produced results similar to those obtained with the radionuclide imaging technique and had the advantage of providing a dynamic evaluation without radiation exposure.

Monitoring Regional Lung Ventilation by Functional Electrical Impedance Tomography during Assisted Ventilationa

1999 ◽  
Vol 873 (1 ELECTRICAL BI) ◽  
pp. 493-505 ◽  
Author(s):  
INEZ FRERICHS ◽  
GNTER HAHN ◽  
HOLGER SCHIFFMANN ◽  
CORD BERGER ◽  
GERHARD HELLIGE
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Lung Ventilation ◽  
Impedance Tomography ◽  
Regional Lung ◽  
Regional Lung Ventilation

scholarly journals Methodology of electrical impedance tomography-derived measures of regional lung ventilation

Critical Care ◽  
2014 ◽  
Vol 18 (6) ◽  
Author(s):  
Inéz Frerichs ◽  
Tobias Becher ◽  
Norbert Weiler
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Lung Ventilation ◽  
Impedance Tomography ◽  
Regional Lung ◽  
Regional Lung Ventilation

Electrical impedance segmentography: A promising tool for respiratory monitoring?

2020 ◽  
Vol 13 (4) ◽  
pp. 489-494 ◽  
Author(s):  
Friedrich Reiterer ◽  
Julia Auinger ◽  
Bernd Urlesberger
Keyword(s):  
Electrical Impedance ◽  
Clinical Care ◽  
Pilot Trial ◽  
Experimental Studies ◽  
Left Lung ◽  
Lung Ventilation ◽  
Data Interpretation ◽  
Monitoring Methods ◽  
Regional Lung ◽  
Regional Lung Ventilation

BACKGROUND: Non-invasive, radiation free bedside monitoring methods have gained increased popularity in the respiratory field. The aim of our study was to report the experience with electrical impedance segmentography (EIS), a rather new technique, which allows continuous visual and quantitative monitoring of regional lung ventilation. METHODS: Prospective, pilot trial in spontaneously breathing, healthy, non-sedated term neonates between 24 and 72 hours post-delivery using a commercially available EIS-device. Systematic review of the literature. RESULTS: A total of 12 neonates were eligible for complete data analysis in our study. EIS was found to be a safe and easy to perform method. The median duration of the study time was 25 minutes (16–40). Individual total and regional impedance values, given in arbitrary units and it's percentage of distribution in the upper and lower right and left lung segments (UR, UL, LR, LL), were variable (median total impedance 207 arbitrary units (AU), UR% 17, LR 27%,UL 28%, LL 23%). A number of influencing factors such as body movements, sucking, jawing, and electrode issues have to be considered for correct data interpretation. The literature search revealed two small experimental studies in neonatal piglets and two human studies (one study in preschool children with bronchopulmonary dysplasia and one case report in a neonate with respiratory distress). CONCLUSIONS: EIS is an innovative technique and a potentially useful tool in studying regional lung ventilation in research and clinical care.

scholarly journals Effect of Early Mobilization from Bed to Wheel Chair on Regional Ventilation Distribution Assessed by Electrical Impedance Tomography in Respiratory Failure Patients

2020 ◽  
Author(s):  
Siyi Yuan ◽  
Huaiwu He ◽  
Yun Long ◽  
Yi Chi ◽  
Zhanqi Zhao
Keyword(s):  
Respiratory Failure ◽  
Electrical Impedance ◽  
Early Mobilization ◽  
Lung Ventilation ◽  
Sitting Position ◽  
Ventilation Distribution ◽  
Regional Ventilation ◽  
Impedance Tomography ◽  
Regional Lung ◽  
Regional Lung Ventilation

Abstract Backgrounds: There was limited knowledge about the effect of early mobilization on regional lung ventilation in patients with respiratory failure. The aim of the study was to examine whether electrical impedance tomography (EIT) could help to predict the improvement in ventilation distribution due to mobilization.Methods: Forty-one patients with respiratory failure, who had weaned from ventilator and received early mobilization were prospectively enrolled in this study. EIT was used to assess regional lung ventilation distributions at 4 timepoints during the early mobilization from bed to wheelchair (Tbase: baseline, supine position at the bed, T30min: sitting position on the wheelchair after 30min, T60min: sitting position on the wheelchair after 60min, Treturn: return to supine position on the bed after early mobilization). The EIT-based global inhomogeneity (GI) and center of ventilation (CoV) indices were calculated. EIT images were equally divided into four ventral-to-dorsal horizontal regions of interest (ROIs 1-4). Depending on the improvement of ventilation distribution in dependent regions at T60min (threshold set to 15%), patients were divided into recruited (DR) and non-recruited (Non-DR) groups. Results: From the bed to the wheelchair, a significant and continuous increase of dependent regional ventilation distribution (ROI 3+4: baseline vs. T30min, vs. T60min: 45.9±12.1 vs. 48.7±11.6 vs. 49.9±12.6, p=0.015) and COV (COV baseline vs. T30min, vs. T60min: 48.2±10.1 vs. 50.1±9.2 vs. 50.5±9.6, p=0.003). Besides, there was a significant decrease of GI at T60min. Patients in the DR group (n=18) had significantly higher oxygenation than the Non-DR group (n=23) after early mobilization. ROI4Tbase was significantly negatively correlated to ΔSpO2 (R=0.72, p＜0.001). Using a cut-off value of 6.5%, ROI4Tbase had a 79.2% specificity and 58.8% sensitivity to predict response of dependent region recruitment due to early mobilization. The corresponding area under curve was 0.806 (95%CI, 0.677-0.936).Conclusions: EIT may be a promising tool to predict the ventilation improvement resulted from early mobilization.Trial registration: Effect of Early Mobilization on Regional Lung Ventilation Assessed by EIT, NCT04081129. Registered 9 June 2019 - Retrospectively registered, https://register.clinicaltrials.gov/prs/app/action/SelectProtocol?sid=S00096WT&selectaction=Edit&uid=U00020D9&ts=2&cx=v2cwij

Body and head position effects on regional lung ventilation in infants: an electrical impedance tomography study

2006 ◽  
Vol 32 (9) ◽  
Author(s):  
Sina Heinrich ◽  
Holger Schiffmann ◽  
Alexander Frerichs ◽  
Adelbert Klockgether-Radke ◽  
Inéz Frerichs
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Lung Ventilation ◽  
Head Position ◽  
Impedance Tomography ◽  
Position Effects ◽  
Regional Lung ◽  
Regional Lung Ventilation

Monitoring of regional lung ventilation using electrical impedance tomography

2019 ◽  
Vol 85 (11) ◽  
Author(s):  
Francesco Vasques ◽  
Barnaby Sanderson ◽  
Nicholas A. Barrett ◽  
Luigi Camporota
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Lung Ventilation ◽  
Impedance Tomography ◽  
Regional Lung ◽  
Regional Lung Ventilation
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