Page 85 - Clinical Application of Mechanical Ventilation

Classification of Mechanical Ventilators 51

Alarm Systems Self-Assessment Questions
Input Power Alarms Answers to Self-Assessment Questions
Control Circuit Alarms References
Output Alarms Additional Resources
Summary

Key Terms

compressors pressure-triggered
controller servo
cycle variable sine wave
flow-triggered solenoid valves
microprocessor time-triggered
pneumatic drive mechanism

Learning Objectives

After studying this chapter and completing the review questions, the learner
should be able to:
List the 3 drive mechanisms of a ventilator.
List and describe the 4 control circuits of a ventilator.
Describe the 4 control variables (controllers) of a ventilator.

Describe the 5 phase variables (controllers) of a ventilator.
Explain the difference between volume-controlled ventilation and pressure-
controlled ventilation.
Name and describe the characteristics of 12 modes of ventilation.
Identify the components of pressure, volume, and flow waveforms.
Name the 3 alarm systems of a ventilator.

INTRODUCTION

The role of patient management in many situations is dependent on the respiratory
care practitioner’s understanding of mechanical ventilators and their characteristics.
This applies to the acute care setting for all ages: adults, pediatrics, and neonatal
patients. The same is also true in the transport and long-term care environments.
Therefore, it is important for the respiratory care practitioner to understand classifica-
tion of mechanical ventilators and the design characteristics employed by a ventilator
to achieve the task of supporting a patient’s ventilation.
In this chapter, you learn how ventilators are classified according to Chatburn’s
classification system and how the common ventilators employed in various patient
care settings are classified.

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