Medical Applications User Guide (pdf) - Freescale Semiconductor
Medical Applications User Guide (pdf) - Freescale Semiconductor
Medical Applications User Guide (pdf) - Freescale Semiconductor
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Ventilation and Spirometry<br />
12.1<br />
Introduction<br />
A ventilator is a machine designed to mechanically move air in and<br />
out of the lungs to intermittently or continuously assist or control<br />
pulmonary ventilation. This apparatus is principally used in intensive<br />
therapy to help improve the patient’s breathing by regulating the<br />
flow of gas in the lungs. The most common indices of the ventilation<br />
apparatus are the absolute volume and changes of volume of the gas<br />
space in the lungs achieved during a few breathing maneuvers. The<br />
ventilator is constantly monitored and adjusted to maintain appropriate<br />
arterial pH and PaO2.<br />
This system requires a set of sensors for pressure, volume and flow.<br />
The information from the sensors modulates the operations in the<br />
MCU/MPU. This MCU/MPU receives information from the airways,<br />
lungs and chest wall through the sensors and decides how the<br />
ventilator pump responds.<br />
64 <strong>Medical</strong> <strong>Applications</strong> <strong>User</strong> <strong>Guide</strong>
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