Chapter 7. Operating Theory

Introduction

System Overview

Ventilator Breath Types

This chapter describes the ventilator’s breath delivery capabilities. It includes a system overview and descriptions of the ventilation modes and available breath types. For descriptions of button settings and general operating instructions, refer to Chapter 8, “Operating Instructions”.

The ventilator is a microprocessor-controlled ventilator capable of delivering a mixture of air and oxygen to a patient’s lungs in a predetermined manner to augment or replace the work normally performed by the patient’s respiratory system. The ventilator performs breath delivery via two different patient interfaces:

•endotracheal tube or tracheostomy tube (invasive ventilation)

•face mask, nasal mask, nasal pillows, or mouthpiece with a seal (non- invasive ventilation)

The ventilator provides the following ventilation breath types:

•Volume Control Ventilation (VCV) – invasive ventilation

•Pressure Control Ventilation (PCV) – invasive ventilation

•Non-Invasive Positive Pressure Ventilation (NPPV) – non-invasive ventilation

During mechanical ventilation, the operator selects one of the ventilation modes. The selected ventilation breath type, along with the selected mode, the patient breathing effort, and the ventilator settings determine the type of breath delivered. Each ventilation breath type has its own settings, alarms, and monitor screens. (Refer to Chapter 8, “Operating Instructions”.)

Volume Control Ventilation (VCV)

In Volume Control Ventilation, breaths may be controlled by the ventilator (mandatory) or triggered by the patient (spontaneous). When controlled by the ventilator, breaths will be flow controlled and time cycled, thus delivering an operator (TIDAL VOLUME) set volume. In Volume Control Ventilation, the flow pattern can be selected between square and descending ramp waveforms. Refer to Figure 7-1.

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Respironics V200 Ventilator Operator’s Manual

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Philips V200 manual Operating Theory, Introduction System Overview Ventilator Breath Types, Volume Control Ventilation VCV
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