The <Lung> page of the supervisory application is used to make adjustments to the respiratory state of the patient.
The values set on this page are all nominal - ie they represent the value of the parameter before any intervention or therapy has occurred.
The <QsQt> slider is used to set the nominal Shunt Fraction of the patient. In healthy patients, Shunt Fraction typically ranges between 0.03 and 0.10, whereas a patient in severe respiratory failure may have a shunt fraction of > 0.5.
The <VdVt> slider is used to set the nominal 'Physiological' Dead Space of the patient. In healthy patients, Dead Space is typically ~ 0.3, whereas a patient in severe respiratory failure may have a dead space of > 0.6.
The <Comp> slider is used to set the nominal Total Lung Compliance of the patient. The Total Lung Compliance of a normal adult is around 100 ml/cm H20. Many disease states (including Adult Respiratory Distress Syndrome (ARDS), pulmonary oedema, pulmonary fibrosis, and pneumonia) result in a decreased Total Lung Compliance .
The <Raw> slider is used to set the nominal Airway Resistance of the patient. The normal value for an adult is around 0.5 - 1.5 cm H20/L/sec.
The <FRC> slider is used to set the nominal Functional Residual Capacity of the patient. The normal value for an adult is around 2.0 - 2.5L.
The <Rate> slider is used to set the nominal Respiratory Rate of the patient.
The <Vt> slider is used to set the nominal Tidal Volume (in litres) of the patient.
The <FiO2> slider is used to set the initial inspired oxygen of the patient.