This is a prospective, observational study to assess agreement of pulmonary health parameters measured by a new non-invasive physiologic monitor, the VQm pulmonary health monitor (PHM)™ with clinical gold standards.
Prospective Non-Interventional Study Evaluating Non-invasive Measurements of Pulmonary Blood Flow, Functional Residual Capacity, Shunt Fraction Index and Airway Dead Space Measured With the VQm PHM™ to Clinical Gold Standards
The specific aim of this study is to evaluate the intermittent non-invasive measurements of pulmonary function: pulmonary blood flow (PBF), functional residual capacity (FRC), shunt fraction index (Qsi) and airway dead space measured by the VQm PHM™ compared to known clinical standards. PBF will be compared to continuous and intermittent bolus thermodilution cardiac output as measured through a Swan-Ganz catheter. FRC will be compared to an FRC measurement provided by the ventilator (GE Healthcare, FRC INview software module). Qsi will be compared to shunt fraction calculated through mixed venous and arterial blood gas values (VBGs/ABGs). Airway dead space will be compared to an airway dead space measurement provided by the ventilator (GE Healthcare, Vent Calculations software module).
