Electrical Impedance Imaging of Patients on Mechanical Ventilation

Colorado State University2 enrolled

Overview

The goal of this study is to evaluate the sensitivity and specificity of Electrical Impedance Tomography (EIT) as a bedside diagnostic tool for lung pathologies in patients who are mechanically ventilated. In electrical impedance tomography low amplitude, low frequency current is applied on electrodes, and the resulting voltage is measured and used to computed the electrical properties of the interior of the chest as they change in time. The computed properties are used to form an image, which can then be used for monitoring and diagnosis.

The goal of this study is to characterize the ability of the electrical impedance tomography system (hardware and software) to distinguish between lung pathologies by assessing the sensitivity and specificity as well as the overall agreement with the CT scan in terms of spatial resolution. The study will test, as well as refine, the mathematical algorithms needed to create meaningful outputs on adult patients receiving mechanical ventilation and who also have received or will be receiving a CT scan as part of their standard of care.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Pneumothorax Pulmonary Contusion Pleural Effusion Pulmonary Edema Atelectasis

Interventions

Mechanical VentilationDEVICE

Subjects will receive mechanical ventilation as part of their standard of care, as specified in the enrollment criteria

CT ScanDEVICE

Subjects will receive a CT scan as part of their standard of care, as specified in the enrollment criteria

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patients admitted to the ICU at Medical Center of the Rockies and on mechanical ventilation * Age greater than or equal to 18 * Computed Tomography of the chest during normal course of hospital admission Exclusion Criteria: * Age \<18 * Any skin disorder that would prevent placement of the electrodes on the chest wall * Hemodynamic instability prohibiting patient from being moved to place the device

Outcomes

Primary Outcomes

Sensitivity and specificity for diagnosing lung pathology

The sensitivity and specificity of EIT for the detection and identification of different types of lung pathology will be assessed with clinical diagnosis aided by CT scan as the gold standard.

Time frame: One year

Secondary Outcomes

Regional correlation with CT scan

The spatial correlation between the organs and lung pathology in the CT scan image in the plane of the electrodes and the EIT image will be computed.