Regional Ventilation Displayed by Electrical Impedance Tomography as an Incentive to Decrease Positive End-Expiratory Pressure

Yoshida, Toyohiko; Piraino, Thomas; Lima, Cárita Portilho de; Kavanagh, Brian P.; Amato, Marcelo B. P.; Brochard, Laurent

doi:10.1164/rccm.201904-0797le

Cited by 50 publications

(49 citation statements)

References 14 publications

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“…34 Monitoring of the ventral/dorsal distribution can provide information regarding the need to attempt an increase in PEEP, but it can also serve as an incentive to decrease PEEP. 35 When the dorsal fraction of ventilation is low (ie, < 50%), increasing PEEP should be attempted and monitored for improved distribution and regional compliance changes. Patients who respond well to increases in PEEP should exhibit a shift from ventral to dorsal regions (Fig.…”

Section: Ventilation Distributionmentioning

confidence: 99%

Lung Volume Measurement and Ventilation Distribution During Invasive Mechanical Ventilation

Piraino

2020

Respir Care

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Lung volume measurement performed during invasive mechanical ventilation can be used to determine functional residual capacity, changes in end-expiratory lung volume with the application of PEEP, and lung strain. However, many bedside measurements provide useful information without the use of specialized equipment. Ventilation distribution through the lung has traditionally been assessed with computed tomography, but more recently electrical impedance tomography has brought the ability to monitor this at the bedside, and without exposure to radiation. This review will describe techniques to measure lung volumes in the ICU and the relationship between lung strain, stress, and other measurements. This review will also discuss monitoring ventilation distribution at the bedside and the clinical assessment of regional compliance that this technology provides.

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Section: Ventilation Distributionmentioning

confidence: 99%

Lung Volume Measurement and Ventilation Distribution During Invasive Mechanical Ventilation

Piraino

2020

Respir Care

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“…Electrical resistance tomography (ERT) [1][2][3][4][5][6][7][8][9][10] is a branch of electrical tomography, alongside with electrical capacitance tomography (ECT) [11][12][13][14][15][16], electrical impedance tomography (EIT) [17][18][19][20][21][22][23][24][25] and electromagnetic tomography (EMT) [26][27][28][29]. Compared with traditional detection methods, this novel real-time detection technique satisfies the high accuracy requirement of modern detection tasks, and enjoys broad application prospects in various fields, namely, twophase/multi-phase flow, geophysical exploration and biomedicine.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Hessian Matrix in Modified Newton-Raphson Algorithm for Electrical Resistance Tomography

Xiao¹

2019

EJEE

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To satisfy the accuracy of image reconstruction, this paper carries out offline optimization of the Hessian matrix in the modified Newton-Raphson algorithm (MNRA) for image reconstruction of electrical resistance tomography (ERT). Firstly, the selection strategy of regularization factor, which directly affects the accuracy of the reconstructed image, was discussed in details. Next, the improved particle swarm optimization (PSO) algorithm was adopted to alleviate the ill-posedness of the Hessian matrix through offline optimization. The variables of offline optimization include the radius ratio between each layer of the finiteelement model (FE model) to the sensitive field (SF) during the γ-refinement of the ERT, and the positions of the nodes added through element subdivision. The experimental results show that, under the same conditions, the above optimization measure can improve the solution accuracy of the ERT's inverse problem by alleviating the ill-posedness of the Hessian matrix, which is used to correct the dielectric resistance distribution (DRD) in the SF, without sacrificing the real-time performance of the MNRA.

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“…d) Physiologic research using imaging modalities such as electrical impedance tomography could be used to assess the impact of various manipulations in driving pressure. 35 Because increases in PEEP or a reduction in plateau pressure impacts driving pressure, differences in lung injury/atelectasis distribution as a result may be important to evaluate, 36 but may also differ depending on the amount of lung available for gas exchange based on imaging of the recruitable lung volume. 37 e) Basic studies regarding cell stretch and deformation of the lung are ongoing but could be used to identify which forces may have the greatest impact on injury and repair.…”

mentioning

confidence: 99%

Driving Pressure for Ventilation of Patients with Acute Respiratory Distress Syndrome

2020

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Regional Ventilation Displayed by Electrical Impedance Tomography as an Incentive to Decrease Positive End-Expiratory Pressure

Cited by 50 publications

References 14 publications

Lung Volume Measurement and Ventilation Distribution During Invasive Mechanical Ventilation

Lung Volume Measurement and Ventilation Distribution During Invasive Mechanical Ventilation

Optimization of Hessian Matrix in Modified Newton-Raphson Algorithm for Electrical Resistance Tomography

Driving Pressure for Ventilation of Patients with Acute Respiratory Distress Syndrome

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