Related Experiment Video
Updated: Mar 5, 2026
Monitoring Lung Function with Electrical Impedance Tomography in the Intensive Care Unit
Published on: September 6, 2024
Bedside Breath-Wise Visualization of Bronchospasm by Electrical Impedance Tomography Could Improve Perioperative
Pedro de la Oliva1, Andreas D Waldmann, Stephan H Böhm
1From the *Pediatric Intensive Care Unit, Hospital Universitario La Paz, Madrid, ES, Spain; †Department of Pediatrics, Medical School, Universidad Autónoma de Madrid, ES, Spain; ‡Swisstom AG, Medical Research, Landquart, CH, Switzerland; and §Pediatric Anestesia and Reanimation Unit, Hospital Universitario La Paz, Madrid, ES, Spain.
Abstract:
Bronchospasm appears in up to 4% of patients with obstructive lung disease or respiratory infection undergoing general anesthesia. Clinical examination alone may miss bronchospasm. As a consequence, subsequent (mis)treatment and ventilator settings could lead to pulmonary hyperinflation, hypoxia, hypercapnia, hypotension, patient-ventilator asynchrony, volutrauma, or barotrauma. Electrical impedance tomography (EIT), a new noninvasive technique, can potentially identify bronchospasms by determining regional expiratory time constants (τ) for each one of the pixels of a functional EIT image. We present the first clinical case that highlights the potential of breath-wise EIT-based τ images of the lung to quickly identify bronchospasm at the bedside, which could improve perioperative patient management and safety.
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