top of page

8 Modes of Anaesthetic Ventilation and Their Uses

There are several modes of anesthetic ventilation used in anesthesia machines, each serving specific purposes. This blog is a quick guide to the 8 modes and what scenarios they may be used for.

1. Volume Control Ventilation (VCV): Delivers a preset tidal volume to the patient with each breath. It is commonly used in general anesthesia and provides predictable ventilation.

2. Pressure Control Ventilation (PCV): Maintains a set airway pressure during inspiration. PCV is useful in patients with variable lung compliance and is often employed during laparoscopic surgeries.

3. Pressure Support Ventilation (PSV): Augments the patient's spontaneous breaths by providing additional pressure support. PSV is commonly used during weaning from mechanical ventilation.

4. Synchronized Intermittent Mandatory Ventilation (SIMV): Combines controlled mechanical breaths with the patient's spontaneous breaths. It allows patients to maintain some degree of respiratory effort while still receiving support.

5. Pressure-Controlled Inverse Ratio Ventilation (PC-IRV): Employs a prolonged inspiratory time compared to expiratory time. This mode is used in specific cases to improve oxygenation in patients with acute respiratory distress syndrome (ARDS).

6. Continuous Positive Airway Pressure (CPAP): Maintains positive pressure throughout the respiratory cycle, enhancing oxygenation. CPAP is often used in postoperative care and in treating conditions like sleep apnea.

7. Bi-level Positive Airway Pressure (BiPAP): Offers two different pressure levels, higher during inspiration and lower during expiration. BiPAP is utilized in non-invasive ventilation for conditions like chronic obstructive pulmonary disease (COPD).

8. Airway Pressure Release Ventilation (APRV): Utilizes two levels of continuous positive airway pressure with brief releases. APRV is beneficial in managing patients with acute lung injury.

Understanding these ventilation modes allows anesthesiologists to tailor respiratory support to individual patient needs, optimizing oxygenation and ventilation during various medical scenarios.

To learn more about Penlon's Anaesthesia Machines, preventative maintenance, and on-site training by Andar International, visit or email

26 views0 comments


bottom of page