Skip to main content
Figure 3 | Critical Care

Figure 3

From: Expiratory time constant for determinations of plateau pressure, respiratory system compliance, and total resistance

Figure 3

Computerized bedside system for determining expiratory time constant and related parameters. Data from pressure, flow, and carbon dioxide sensors, positioned between the endotracheal tube and ventilator breathing circuit, are directed to a monitor (NM3, Respironics) for measurements of pressure, flow, and volume. Data from the monitor are in turn directed to a laptop computer containing software (Convergent Engineering) for the determinations of expiratory time constant (ƬE), inspiratory plateau pressure (Pplt), total respiratory resistance (Rtot), and respiratory system compliance (Crs).

Back to article page