Mechanical Ventilation

Chapter 76 Mechanical Ventilation






Clinical Thinking


When encountering the patient with a respiratory problem, consider:














Medical Knowledge



Modes of Ventilation/Settings


Editor’s note: Understanding mechanical ventilation first requires familiarization with the vernacular used in the respiratory care field. A glossary of the different types of ventilatory approaches follows. Note that there are two basic modes of ventilation: volume limited (gas flow continues until a predetermined inspired volume is achieved) and pressure limited (gas flow continues until a predetermined airway pressure is reached). Following a description of the ventilation modes, primary and secondary ventilatory controls are outlined.



Volume-limited Ventilation


Volume-limited ventilation involves the delivery of gas until a preset tidal volume (VT) is reached; airway pressures can vary depending on compliance or stiffness of the lungs. Expiration is passive. The following settings vary by how the ventilator responds to spontaneous inspiratory effort.






Pressure-limited Ventilation


This mode involves the delivery of gas until a preset peak airway pressure is reached, so the actual volume of gas delivered can vary per breath based on lung compliance.




Mar 20, 2017 | Posted by in GENERAL SURGERY | Comments Off on Mechanical Ventilation
Premium Wordpress Themes by UFO Themes
%d bloggers like this: