Volume Control vs Pressure Control | Mode of Mechanical Ventilation

Volume Control vs Pressure Control: What are the differences? Watch the video to find out!

➡️ What is a Ventilator Mode?
A ventilator mode is a way to describe how the mechanical ventilator assists a patient with inspiration. The characteristics of a particular ventilator mode controls how the machine functions and assists with the pattern of breathing.

➡️ Two Primary Control Variables:
1. Volume Control
2. Pressure Control

➡️ Volume Control means that you can set, or control, the patient's tidal volume. So with a set tidal volume and a set respiratory rate, this means that there is a known minute ventilation. This is good when it comes to making adjustments to achieve a desired PaCO2. One of the negative aspects of using Volume Control is that, since the tidal volume is preset, if the patients lung compliance were to decrease, this could result in high peak pressures. Another drawback of Volume Control is patient-ventilator dyssynchrony.

➡️ Pressure Control means that you can set, or control, the patient's pressure in order to achieve a desired tidal volume. As with Volume Control, a Pressure-Controlled tidal volume and set rate can help you reach a desired PaCO2. The main disadvantage of using Pressure Control is the patient's tidal volume can potentially be unstable if there are changes in the patient's lung compliance or airway resistance.

So again, Volume Control and Pressure Control — those are the two control variables. When initiating mechanical ventilation on a patient, once you select the control variable, now you can choose the actual operational mode that determines the pattern of breathing for the patient. Understanding the different ventilator modes is one of the most important aspects of mechanical ventilation.

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🚑MEDICAL DISCLAIMER
Medicine and Respiratory Therapy are continuously changing practices. The information in this video is for educational and entertainment purposes only. For medical advice, please consult with a physician or qualified medical professional.

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⏰TIMESTAMPS
0:00 - Intro
0:06 - What is a Ventilator Mode?
0:28 - Two Primary Control Variables
0:37 - Volume Control
1:15 - Pressure Control

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