The lack of significant correlation between PEEP and the IR, and the fact that in three patients, despite the change in PEEP (although small) and an unchanged EVLW, the IR remained within a 10% change, prove the independency of the IR in relation to the PEEP. Second, pleural effusion interfered with transthoracic impedance measurements of […]
Our data show that EIT, by using an IR that is based on ventilation-induced impedance changes in the anterior and the posterior parts of the lung, is a noninvasive technique that may be a reasonable estimate of EVLW in ARF. read more The explanation for the increase in the IR, and thus the presence of […]
Two reproducible measurements could not be obtained in two patients because of the disturbing influences of subcutaneous emphysema and edema on EIT measurements, and these were excluded from the analysis. The calculated CV was 4.1%, whereas the RC was 92%. A significant correlation of 0.91 (p < 0.001) between the analyses by both observers was […]
Assessment of EVLW Twenty-nine measurements in 14 patients could be performed. In two patients, no second day follow-up measurement could be performed due to damage to the fiberoptic catheter (patients 1 and 6); in one patient, it was impossible to collect correct EIT data due to the existence of severe subcutaneous edema (patient 7). Nine […]
Two independent observers blinded for the EVLW measurements by the TDD analyzed the EIT measurements. Interobserver variation was studied by calculating Pearson’s correlation coefficient. Receiver operator characteristic (ROC) analysis was used to assess the optimal cutoff level of the IR to diagnose an increased amount of EVLW (> 10 mL/kg). The ROC curve shows the […]
TDD: In this study, TDD assessment of the amount of EVLW was performed using the COLD System (Pulsion Medical Systems; Munich, Germany). The principle is based on the injection of two indicators (indocyanine green [ICG] and cold glucose 5% [4°C]), with detection of their dilution curves after passage through the pulmonary circulation. The ICG and […]
In ARDS, lung density increases from the ventral to the dorsal lung regions in the supine position and an increased amount of EVLW causes compression atelectasis in the posterior part. Because EIT can visualize regional ventilation, we hypothesized that differences in the ventilation-induced impedance changes occurring between the anterior part and posterior part of the […]
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