Chapter 4 | Control Modes
Overview
In Chapter 2, we discussed the basics of mechanical ventilation, identified the basic categories of control and spontaneous modes of ventilation and the differences between the two. It is time to build on that foundation and dive into the specifics of control modes of ventilation and the differences between pressure and volume control.
In this chapter we will cover:
- Overview of volume control and pressure control
- The relationship between volume, pressure and time
- How lung compliance and resistance will impact the delivery of air into the lungs
Application
In order to use control modes of ventilation in practice, it is important to understand the significance of setting a ventilator according to pressure and according to volume. When additional factors, such as time, flow, and lung compliance are including in this understanding, you are better equipped to use control modes effectively for a specific patient’s condition.
Learning Objectives
At the end of this chapter, you will be able to:
- Explain the relationship between pressure and volume.
- Differentiate between set parameters in volume control and pressure control
- Describe the impacts of changing settings in control modes
- Describe how lung changes will impact volumes and pressures in the lungs
Key Terms
In this chapter, you will learn about all of the following key terms. These terms will be used throughout this book, so it is important to take the time to master them and practice your recall often.
- Inspiratory Time (IT)
- Flow
- I:E
- gas-trapping (or Auto-PEEP)
- lung compliance
- lung Resistance
- synchrony
Whenever these terms are first introduced in this chapter, they are bolded. However, if you need additional information about a term than what is provided here, you can research it in The Free Dictionary: Medical Dictionary.
